Abstract:Amomum tsao-ko Crevost et Lemaire (ACL) is a kind of natural flavor plant. In order to determine the key odorants in dry ACL, the volatiles in the pericarp and kernel of Dried ACL were extracted by direct solvent extraction combined with solvent-assisted flavor evaporation (SAFE), and the isolates were analyzed by gas chromatography-mass spectrometry-olfactometry (GC-MS-O). Twenty-two odor-active regions were detected, and 22 odor-active components (OACs) were identified by comparing the odor characteristics, MS data, and retention indices with those of authentic compounds. OACs were quantitated by using 2-octanol and 2-isopropylphenol as the internal standards. The results showed that the concentrations of OACs in kernel were higher than those in pericarp. Their odor activity values (OAVs) were calculated. Based on the OAVs obtained, 19 flavor compounds were determined as the key odorants of dried ACL. Some key odorants, including (E)-2-decenal, 1,8-cineole, linalool, (E)-2-dodecenal, octanal, (E)-2-octenal, decanal, β-pinene, hexanal, α-terpineol and vanillin, were common in the pericarp and kernel of Dried ACL, and they made the pericarp and the kernel have some similarities in odor attributes. However, some odorants, including (E,E)-2,4-decadienal, nonanal, nerol, geraniol, geranial, geranyl acetate, (E)-nerolidol and 4-terpineol, only occurred in the pericarp or the kernel, which made their odors different from each other.

Abstract:In order to improve the packaging performance of sodium alginate (SA) films, carvacrol (CAR) / SA composite films were prepared using the solvent casting method. And the chemical structures, and morphologies were investigated using SEM, XRD, and FTIR. The thermal stability, physical, chemical, antifungal, and preservative activities of the composite films were also studied. These results showed that the roughness of the composite films has increased. And the packing of SA chains had been altered by the CAR due to the formation of strong interaction, namely hydrogen bonding and electrostatic, between SA and CAR. The thermal stability increased after adding CAR and then decreased obviously. The resultant composite film containing 0.8% CAR (volume fraction) exhibited the optimal comprehensive perfor-mance with a water solubility of 90.48%, a transparency of 0.23 mm-1, a water vapor transmission rate of 0.17 g/(d•cm2), a tensile strength of 72.24 MPa, an elongation at break of 83.41% and an inhibition efficiency against Trichoderma sp. of 65.79%. The CAR/SA composite films could effectively maintain the quality of postharvest white mushrooms and extend their shelf life.

Abstract:With the rapid development of software and hardware technology, molecular dynamics simulation technology has developed into a mature method to reveal the interaction of complex systems from the molecular atomic scale, which has been widely used in the research of surfactant self-assembly.This paper focuses on the research progress of molecular dynamics simulation technology in the self-assembly of surfactants, the formation of self-assembled bodies with different morphologies of surfactants, the structure of self-assembled bodies and the performance of self-assembled bodies. The research conducted an inductive analysis and summarized the underlying mechanism and dynamic formation process of self-assembly.On this basis, the problems of molecular dynamics simulation technology in the study of surfactant assembly and the future development direction are pointed out.

Abstract:In recent years, the wide application of organic pesticides caused serious contaminations of water, soil, and atmospheric. The development of fast, high-efficiency, and convenient determination of organic pesticides has become a significant research topic in the field of environmental science. In comparison to traditional detecting techniques of organic pesticides, determination of organic pesticides by fluorescent probes has advantages of high detection sensitivity, strong stability, and easy to handle. A full survey on the determination of organic pesticides by fluorescent probes of small organic molecules, supermolecules, and metal-organic frameworks (MOFs) have been reported in this review, respectively. And the conrresponding types of fluorescent probes, varieties of organic pesticides and solvents, reaction phenom-ena, and detection mechanisms have been discussed. Finally, the development tendency of MOFs fluores-cent probes in the determination of organic pesticides was summarized and prospected emphatically. In the future, the determination of organic pesticides will continue the tendency of exploring fast, efficient, and environmental friendly detecting techniques, and develop hyphenated techniques of organic pesticides detecting and pollution restoration in China.

Abstract:Using acrylic acid (AA), butyl acrylate (BA), hydroxyl ethyl acrylate (HEA), isobornyl methacrylate (IBOMA) and methyl methacrylate (MMA) as the main raw material, 1, 3 - divinyl tetramethyl two siloxane(DVMS)as the modifier, isopropyl alcohol(IPA) as the solvent, azodiisobutyronitrile (AIBN) as the initiator to prepare the acrylic resin pre-polymers. Using triethylamine as the neutralizer. Then add water to make a series of acrylic resin. At last, the resin film was prepared. The viscosity of the acrylate water dispersions were tested by viscometer. The characterization of the cured resin films were analyzed by FTIR,TGA,XPS,SEM,TEM and so on. In addition, the storage stability, the water absorption of the dispersoid and the gloss were also tested. The results show that when the amount of DVMS was 6wt%, the performance of the resin film was improved greatly and the storage stability of the resin was the best. At the same time, the tensile strength of the coating reached 14.3 MPa. The elongation at break was 324%. When the thermal decomposition weightlessness was 5% and the decomposition temperature was 283 ℃. When the coating temperature was 25 ℃-35 ℃, the coating compactness of resin film increased and had high gloss and good adhesion. The adhesion was 1 degree. The hardness was 2H.

Abstract:The nano-particles of Zeolitic Imidazolate Frameworks ZIF-8 were prepared by solvent process, and the effects of reaction solvent, temperature and time on the structure and properties of ZIF-8 were investigated systematically. Then the synthetic ZIF-8 particles were used as the carrier of the anti-cancer drug doxorubicin hydrochloride (DOX), and the dissolution in vitro were studied. The results showed that the nano-particles of high crystallinity could be obtained in the solvent of methanol, n-octanol or deionized water, respectively. But in the case of deionized water, the triethylamine needed to be added to promote the deprotonation of Ligands. The optimized yield was achieved at the temperature of 25℃, and the 80% of the reaction processes were completed in the initial 3 hours determined by the turbidity. The synthetic nano-particles had good hydrothermal stability, and were sensitive to the acid environment. The drug loading efficiencies for DOX were from 16% to 20%, and the speed of the dissolution in vitro was faster obviously in acid environment than it in the neutral environment.

Abstract:By using anthracene-9-carboxylic acid (9-ACA) as the emitter and palladium(II)-octaethylporphyrin (PdOEP) as the sensitizer, highly effective pH-responsive TTA-UC system was obtained at the optimal mol ratio 80∶1. The UC intensity and pH value showed good linear relationship in the pH range of 4~8 and 8~11, respectively. In the control experiment, fluorescence of 9-ACA did not reveal linear relationship with pH, proving that the broad-range pH responsiveness is derived from the triplet-triplet energy transfer (TTET) process between the sensitizer and emitter.

Abstract:Octyl Alginate Derivative (OAD), prepared by bimolecular nucleophilic substitution reaction (SN2) with 1-Bromooctane as a hydrophobic modifier, was characterized by means of Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance (1H NMR) to confirm its structure. Meanwhile, the performance of OAD was characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), fluorescence spectrum (FM), surface tension (SFT), transmission electron microscope (TEM), laser particle size and zeta potential analyzers. The results of FTIR and 1H NMR showed that, the octyl group was suc-cessfully grafted onto the alginate backbone. It can be seen from the TGA and XRD that, due to the grafting octyl side chains, the intramolecular hydrogen bond of OAD was broken, thus resulting in the de-crease of its thermal stability, the increase of its weight loss rate in TGA study and the change of its micro-crystalline structure. From the fluorescence measurement, with the increase of OAD concentration, the ra-tio of the first electron vibration peak to the third electron vibration peak fluorescence intensity (I1/I3) that was related to the micro-environmental polarity surrounding pyrene molecules gradually decreased, indi-cating the reduction of the micro-environmental polarity. It can be deduced from I1/I3 value that, as a re-sult of the grafting of octyl side chains, the critical aggregation concentration (CAC) of sodium alginate (SA) decreased from 1.09 g/L to 0.34 g/L. Meanwhile, the SFT gradually decreased as the concentration increased. Both of the FM and SFT results revealed that OAD had good amphipathicity, though they ob-tained the different CAC. From the TEM, it intuitively displayed that OAD formed micelle-like self-aggregates, which appeared spherical structure. Furthermore, compared with SA, the hydrodynamic particle size (dH) of OAD decreased from 255 nm to 193.2 nm. Besides, its zeta potential also decreases from -36.4 mV to -39.3 mV. These results showed that OAD possessed certain colloidal interface activity. The drug-loaded micro-/nano-capsules were prepared by the use of OAD micelles to load ibuprofen, which have certain sustained-release property, Moreover, the release profile was fitted well with the Non-Fickian diffusion model.

Abstract:A series of Luteolin complex molecular imprinted polymers（LUT-CIPs）were synthesized in water with coordination of Zn（II），using luteolin as dummy template, acrylamide (AM) as monomer and N, N?- methylene diacrylamide (MBA) as cross-linker，and the adsorption ability of LUT-CIPs were also studied. The results showed that：when n(luteolin-Zn2 )∶n(AM)∶n(MBA) was 1∶4∶30, the obtained LUT-CIPs possessed the highest adsorption properties, and the adsorption capacity for luteolin from ethanol phase reached 36.4mg/g ，selectivity coefficient of luteolin for apigenin was 5.09 and for rutin was 3.35. The adsorption process of luteolin in LUT-CIPs conforms to the Freundlich isothermal adsorption model and the quasi-second-order kinetic equation. The adsorption capacity was increased when adding metal salts to solution, the influence was Pb(Ac)2> Ce2(SO4)3> Bi(NO3)3> Cu(Ac)2> Mg(NO3)2> Zn(Ac)2> Ba(NO3)2> MnSO4> NiSO4> ZnSO4> CdSO4，the adsorption of adding Pb(Ac)2 was 2.48 times that of adding Zn(Ac)2，5.20 times that of adding nothing.

Abstract:The molecularly imprinted microspheres for crystal violet (CV) were synthesized by precipitation polymerization in which crystal violet was used as template, α-methacrylic acid (MAA) as functional monomer and ethylene glycol dimeth acrylate (EGDMA) as crosslinker. Meanwhile, the properties of microspheres for different crosslinkers and dosage, different mole ratio of functional monomers to templates were also investigated. The optimal conditions were as follows: shaking bath, 30 mL acetonitrile as solvents, EGDMA as cross-linker and the molar ratio of CV : MMA : EGDMA= 1 : 4 : 20. Under this synthesis conditions, the adsorption capacity of polymer microspheres were as high as 39.1 μmol/g，separation factor α and imprinting efficiency factor β are 3.76 and 3.18 respectively. It showed good identification and adsorption ability to target molecules.

Abstract:In this study, we developed the innovation of Zn-doped Chitosan aerogel using Chitosan as template and ZnCl2 as precursor, which employed the properties of three-dimensional porous structure. By adopting field-emmision scanning electron microscope (FESEM) and N2 adsorption/desorption, we learn that the Zn-doped Chitosan aerogels have three-dimensional porous structures featuring high surface area. When the mass ratio of Chitosan to ZnCl2 is 1:1, the measurements show that the aerogel has high BET surface area of 460 m²/g, average pore diameter about 3~10nm, which means the aerogel possesses the typical characteristic of porous.

Abstract:The encapsulated spherical activated carbon was prepared with polyvinyl butyral (PVB) under different PVB solution mass fraction and molecular weight. Then the adsorption performance of encapsulated spherical activated carbon was investigated in blood simulation system consisting of creatinine, VB12 and lysozyme. The single component and differential binary component adsorptions processes were analyzed by using adsorption kinetics and adsorption isotherms. The structure and morphology of encapsulated spherical activated carbon were characterized by SEM, BET, mercury intrusion porosimetry and FTIR. The results showed that the adsorption mechanism of activated carbon before and after encapsulating were chemical adsorption. PVB mass fraction was the factor which had the greatest influence on the adsorption amount and the adsorption rate. Adsorption decreased significantly with the increase of the mass fraction. The molecular weight of PVB had minor effect, but it was of great significance in enhancing the hydrophilic effect on the carbon surface. In the binary component system, lysozyme had a significant competitive adsorption effect on VB12, up to 30% adsorption strength of VB12. In another system consisting of creatinine and lysozyme, the adsorption strength of both components were below 8% and the competitive adsorption phenomenon was not obvious.

Abstract:Flax fiber (FF) was grafted chemically with maleic anhydride (MA) that gave MA-FF, then treated with sodium carbonate solution that gave the flame retardant modified FF with Na+, expressed as Na2CO3-MA-FF. The appearance of carbonyl peak in FTIR proves that MA was grafted to FF. The grafting degree (Gd) of MA on FF was determined by acid-base titration. The flame retardant effect of Na+ on FF was evaluated by LOI and vertical burning test. The FF crystallinity was analyzed by XRD. The results show that when MA and FF react for 2.4h in DMF with the mass ratio of 48:60 under 105 ℃, the Gd can reach 71~75%. The flame retardancy of FF increases with the increase of Na+ content. The LOI value of 20-Na2CO3-MA-FF（MA-FF was treated with 20 g/L Na2CO3 aqueous） was increased from 20% to 28.9%, the afterflame time decreased from 41 s to 0 s, damaged length decreased from 30 cm to 8.3 cm. After MA grafting, the FF crystallinity increased from 66.7% to 75.0%, the crystallinity of 20-Na2CO3-MA-FF was slightly reduced to 71.8%, but the 2θ angles have no change, are all still 14.8 ° , 16.7 ° and 22.8 °.

Abstract:Three diphenylamino modified cationic cyclometalated platinum(II) complexes Ⅰ-Ⅲ have been designed and synthesized with 1,10-phenanthroline as an auxiliary ligand. The photophysical, electro-chemical and oxygen sensing properties of the complexes were investigated systematically. The results show that the introduction of different groups at the 5-position of the pyridine ring of 2-(4-diphenylamino) phenylpyridine can tune the emission wavelength of the platinum(II) complexes from 544 nm to 583 nm. The maximum emission wavelength of the trifluoromethyl-substituted complex Ⅲ is 583 nm. The results of oxygen sensing tests show that the oxygen sensitivity of the complex Ⅲ is remarkably improved, with a value of I0/I2.17 up to 6.4 in DMF.

Abstract:Polyphosphate kinase (PPK) and γ-glutamylmethylamide synthetase (GMAS) were recombinant expressed using pETDuet-1 plasmid in Escherichia coli BL21(DE3), and L-theanine was synthesized by whole cell catalysis with co-expression of PPK and GMAS. The parameters of reaction were investigated and optimized. The SDS-PAGE analysis showed that PPK and GMAS were successfully co-expressed in the recombinant strains. The optimal conditions for whole cell biocatalytic reaction were as follows: 35 oC, pH=7.0, 300 mmol/L monosodium glutamate, 420 mmol/L ethylamine hydrochloride, 100 mmol/L polyP, 2 mmol/L ATP. After 24 h in a 100 mL reaction system, under the optimal conditions the L-theanine yield can reach 199 mmol/L, and the conversion rate reaches 66.34%.

Abstract:Three glutamic acid dialkyl ester ribitol (abbreviated as 2C8GE、2C12GE and 2C14GE) as the nonionic surfactants were synthesized with n-octyl alcohol, lauryl alcohol, and myristyl alcohol, respectively. Lactobacillus helveticus L7 with the ability to biosynthesize cis9,trans11-conjugated linoleic acid in aqueous was coated with these surfactants. Effects of the surfactants type, concentration, solvent, buffer pH, time, temperature and dry methods on the activity of enzyme in coated bacteria were studied. The optimized conditions were bacteria resuspended in pH5.8 buffer and coated with 1.0%(w/w) 2C12GE in acetone, incubated at 4℃ for 4 h, and lyophilized. The Km for lionleic acid as the substrate was 35.7 mM, and Vmax was 5.6 mM/h. The affinity of linoleic acid isomerase and linoleic acid was decreased as the bacteria were surfactant-coated.

Abstract:Iridoid glycosides were extracted from Gentiana rhodantha Franch. by microwave-assisted aqueous two-phase system. The optimal extraction process was determined by single factor experiment and orthogonal experiment. The total antioxidant activity of iridoid glycosides and their ability to scavenge 1, 1-diphenyl-2-trinitrophenylhydrazine (DPPH) free radicals were evaluated. The results showed that the optimum extraction conditions were obtained as follows: ethanol 7.8 g (mass fraction 26%) and K2HPO4 3.0 g (mass fraction 10%) in the establishment of 30.0 g ethanol/K2HPO4 aqueous two-phase system, particle size of dry Gentiana rhodantha Franch. powder 400 mesh, microwave extraction temperature 70±1℃, microwave extraction time 110 s and dry powder 3.5 g. Under these conditions, the extraction yield of iridoid glycosides was 5.48%, higher than that obtained by traditional extraction process (3.61%). This method can inhibit the activity of endogenous hydrolase in the test material and neutralize phytic acid (the acid substance in Gentiana rhodantha Franch.) to reduce the polymerization of dissolved iridoid glycosides, which effectively solves the problem that the iridoid glycosides in Gentiana rhodantha Franch. must be enriched to be detected. Total iridoid glycosides had stronger antioxidant activity than 2,6-di-tert-butyl-4-methylphenol (BHT) in the range of 0.2~0.6 g/L, and stronger scavenging activity to DPPH radicals than BHT in the range of 0.2~1.0 g/L.

Abstract:Cu(x)/TiO2 (x=1, 3, 4, 5, 6, 7; x is the amount of copper loading based on the mass of TiO2 carrier, mass percent/%, the same below) catalysts were prepared by impregnation method using copper nitrate and TiO2 as raw materials. The catalysts were characterized by XRD, XPS, NO-TPD and H2-TPR. The performance of the catalysts for the selective catalytic reduction of NO with NH3 (NH3-SCR) was evaluated in a fixed-bed micro-reactor. The results showed that copper species existed in the form of Cu2O and CuO on the TiO2 carrier. The denitrification performance of catalysts was affected by the amount of copper loading. The Cu(6)/TiO2 catalyst exhibited excellent redox properties and good adsorption/desorption performance for reactants, which showed a good catalytic activity in denitrification reaction even at low-temperature (<300 ℃). When the conversion of NO reached 85% and 95%, the reaction temperature T85 and T95 were 195 ℃ and 218 ℃, respectively. The temperature range for the NO conversion over 95% was from 218 ℃ to 270 ℃ with a width of 52 ℃.

Abstract:Vegetable oil-based polyols were prepared from epoxidized soybean oil and methanol by ring-opening reaction. The effects of catalyst dosage, cocatalyst dosage, reaction time, reaction temperature and molar ratio of alcohol to oil on the ring-opening conversion of epoxidized soybean oil were studied under the conditions of tungsten dioxide dichloride (WO2Cl2) as catalyst and silver trifluoromethanesulfonate (AgOTf) as cocatalyst. And the epoxy values of the products were tested. Under the conditions of catalyst dosage 3% (based on the total mass of methanol and epoxidized soybean oil, the same below), AgOTf dosage 4%, reaction temperature 70℃, reaction time 8 h, and the molar ratio of alcohol to oil 28:1, the ring-opening conversion of epoxidized soybean oil was up to 89.13%.The ring-opening product was characterized by IR, 1HNMR, TG and rheological analysis. The TG analysis revealed that the decomposition temperature of polyols was 334℃, higher than that of epoxidized soybean oil (305℃). The rheological analysis showed that the viscosity of epoxidized soybean oil and polyols decreased with the increase of temperature. At low temperature, the viscosity of epoxidized soybean oil polyols was significantly lower than that of epoxidized soybean oil.

Abstract:Co-graphene composites were prepared by a simple one-step method using glucose as carbon source, NH4Cl as blowing agent and nano-metal Co as catalysts for promoting graphitization of glucose. The formation of graphene and the in-situ growth of Co nanoparticles are simultaneously performed. The structure and morphology of the composites were characterized by XRD, FTIR, XPS, Raman, UV-Visand and TEM. The composite was applied to catalytic reduction of p-nitrophenol (4-NP) and the results showed that 4-NP was completely reduced in 8 min using 4 mg catalyst at room temperature. It can be recycled by simple magnetic separation and has good cycle stability.

Abstract:In order to find antibacterial candidate agents. Using fragment based drug discovery methods, fifteen sulfanilamide derivatives were designed and synthesized with aminophosphonate and sulfonyl chloride as raw material. Their structures were confirmed by IR, 1HNMR and 13CNMR. MICs of the target compounds were determined by double dilution method. The results showed that some compounds have potential inhibitory activities against standard bacteria and drug resistant bacteria, the MIC of the compoundⅡf〔N-[（diethoxyphosphonyl -4-fluorobenzyl]-4-methoxybenzenesulfonamide〕 for S.aureus, E. coli, MRSA and MREC was 32, 64, 128, 128μg/mL, respectively, and the MIC of the compoundⅡl 〔N-[（diethoxyphosphonyl -4-fluorobenzyl]-4-fluorobenzenesulfonamide〕was 32, 32, 64, 64μg/mL, respectively. Its antibacterial activities were better than that of the control drug sulfadiazine.

Abstract:Three extraction methods in terms of organic solvent extraction (OSE), microwave -assisted extraction (MAE) and ultrasonic-assisted extraction (UAE) extraction of anthocyanins from blueberry pomace (BP) were optimized by single factor test and orthogonal test, and anthocyanins components and anti-tumor activity were comparative analysised. The results showed that MAE is superior to OSE and UAE in obtaining anthocyanins content, and the optimum extracting parameters to achieve the highest anthocyanins contents of 46.880.63 mg C3G/g from BP was obtained under the microwave power of 300 W, extraction time of 60 s and solid-to-liquid ratio of 1:40 g/mL. Under the optimal combination of parameters, six anthocyanins components were obtained by the three extraction methods, namely, delphinidin-3-glucoside, cyanidin-3-glucoside, cyanidin-3-rutinoside, petunidin-3-glucoside, malvidin-3-galactoside and peonidin-3,5-two hexoside. The BP extracts obtained by three extraction methods inhibited the growth and the invasion ability of HepG2 hepatoma cells and A549 lung cancer cells, and the inhibition effect of A549 lung cancer cells was stronger.

Abstract:4,4’-Dinitrocarbanilide(DNC) was synthesized by 4-nitroaniline and triphosgene. The by-product hydrogen chloride gas was absorbed by cold methanol. It produced HCI-methanol solution which can be used for synthesizing 2-hydroxy-4,6-dimethylpyrimidine(HDP). The HDP was synthesized in the HCl-methanol as solvent with urea and acetylacetone as raw materials. Coccidiostat nicarbazin was synthesized through the reaction of DNC and the solution of HDP in methanol. Its structure was characterized by 1H NMR. The factors that influenced the reaction such as solvent, reaction temperature and feed ratio etc were optimized. The result shows, when the 4-nitroaniline to triphoshene ratio was 6:1 in xylene as solvent, reaction temperature was 130℃ and reaction time was 15h, the yield of DNC was 94%; when the acetylacetone to urea ratio was 1.0:1.1 in the HCl-methanol as solvent, reflux reaction time was 5h, the yield of HDP was above 93%; when the DNC to HDP ratio was 1.0:1.1 in methanol as solvent, the reaction was through 5h under room temperature, the total yield of Nicarbarzin could reach to 93%. Meanwhile, the production cycle was shortened and the stability of product quality was improved through parallel reactions.

Abstract:α-Muricholic acid was synthesized from hyodeoxycholic acid via esterification, selective oxidation, hy-droxylation of C-7 methylene, carbonyl reduction at C-6 and hydrolysis reactions. The resulting product was finally confirmed by 1H-NMR, 13C-NMR and HRMS. The overall yield from hyodeoxycholic acid was calculated to be 28.9±0.3%. The effect of catalysts on the yield of intermediateⅡand the process stability of the esterification reaction was investigated. The oxidants on the selective oxidation of C-3 or C-6 hy-droxyl group in intermediate Ⅱ were screened, and 2-iodobenzoic acid (IBX) was approved to be good candidate in selective oxidation of the C-6 hydroxyl group in intermediate Ⅱ. The effects of the molecu-lar ratio of Ⅱ to IBX on the yield of intermediate Ⅲ and the process stability under the conditions were explored, and the results were as follow: 1) the yield of intermediate Ⅱ was 99.0% by using concentrated HCl as the catalyst; 2) IBX could selectively oxidize hydroxyl group at C-6 of intermediate Ⅱ and the yield of the intermediate Ⅲ was 82.3% when the ratio of n (Ⅱ): n (IBX) was 1: 1.20; 3) the single crystal structure of intermediate Ⅲ was determined, and its absolute configuration was as expected.

Abstract:This paper takes the basic object of brown granulated sugar remelted syrup to introduced the purification effect and mechanism of magnesium nitrate-phosphoric acid composite detergent on the remelted syrup under the condition of high pH. It makes the option to optimize the purification condition in way of orthogonal test on the basis of the single factor test to determine the element and level of the orthogonal test. The optimum conditions are like this: 2% magnesium ion and 1.70% phosphoric acid composite detergent dosage 2%, pH value 11.0, PAM dosage 2 mg?L-1, temperature 30 ?C, these conditions registers 88.2% of the decolorization rate and 69s of the best falling time. The equipment of SEM, TEM, Nano-ZS90 ZETA potential analyzer, and XRD are harnessed to characterize the complexes in the sucrose system and the brown granulated sugar remelted syrup system and to discuss the related mechanism.

Abstract:Introduced β-cyclodextrin (β-CD) into a mixed casting solution using polyvinyl alcohol (PVA) and quaternized chitosan (QCS) as a film matrix, and then crosslinked three substances in the aforementioned casting solution through a combined crosslinking agent (glutaraldehyde (GA) and melamine (MA)), a series of host-guest complex (CDX-QCSY-PVAY) OH- conductive membranes based on cyclodextrin molecule with full interpenetrating network structure were prepared. The results showed that with the growth of β-cyclodextrin content, the content of —OH increased, and the amount of OH- adsorption by complexing Ca2+ increasesed, cause to the ion exchange capacity(IEC) and conductivity and tensile strength and so on increased, but water uptake, swelling ratio and elongation at break decreased. When the content of β-cyclodextrin was 20%, the comprehensive performance was the best. The water uptake and swelling ratio were 91.3% and 83.4%, separately, the tensile strength and elongation at break were 69.5% and 48.5%. And the ion exchange capacity was 2.64 mmol/g, conductivity can reached 7.1 × 10-2 S/cm at 70 ℃. The conductivity of the above film samples can reached 83% of the original conductivity after soaking for 240 h in an alkaline environment of 6 mol/L KOH solution at 70 ℃, and still maintained good alkali stability.

Abstract:BiVO4/MnO2 composite catalyst-oxidizer are successfully prepared by one-step hydrothermal method, and its structure and properties were analyzed by XRD, FTIR, SEM, EDS and UV-vis DRS. The catalytic-oxidative activities of the samples were evaluated by the degradation of Rhodamine B(RhB). The results exhibited that the composite formed the porous structure, the crystal structure of BiVO4 in BiVO4/MnO2 composite did not change, and shows a leaf-like profile with flaky combination’smorphology. The band gap of BiVO4/MnO2 is smaller than that of BiVO4. When the mass ratio of BiVO4/MnO2 was 10%, the composite showed the highest photocatalytic-oxidative activity. The degradation rate of RhB reached 98.4% at 20 minutes as the pH of solution was 5, and it is much higher than that of pure BiVO4(13.1%). Due to the oxidizing properties of MnO2, BiVO4-MnO2 composites can be used as photocatalytic-oxidants.

Abstract:The heteropoly acid H6P2W18O62 was introduced into the MIL-101(Fe) by solvothermal synthesis to prepare a new adsorbent H6P2W18O62/MIL-101(Fe), and its adsorption performance for methylene blue (MB) was tested. The adsorption properties of the materials under different conditions such as the loading of H6P2W18O62, the mass concentration of methylene blue solution, the pH value of the solution and the temperature were investigated. The materials were characterized by XRD, SEM, FTIR and N2 adsorption-desorption. The experimental results show that the adsorption capacity increased with the increase of the mass concentration of MB before the adsorption equilibrium, when the loading amount of H6P2W18O62 is 35% of the mass fraction of the composite, the adsorption effect of the adsorbent H6P2W18O62/MIL-101(Fe) on methylene blue solution was the best in solution pH=4. The maximum adsorption capacity of MB by H6P2W18O62/MIL-101(Fe) can reach 148.1 mg/g at 303k. By kinetic and thermodynamic analysis, the adsorption process conforms to the pseudo-second-order kinetics and Langmuir isothermal adsorption model. The adsorption is also an endothermic and spontaneous process.

Abstract:Herein, a novel ultra-high salt hydrophobic association polymer UUCPAM was produced using acrylamide, acrylic acid, 2-acrylamide-2-methyl propane sulfonic acid, and hydrophobic monomer UUC. The scanning electron microscopy and transmission electron microscopy studies showed that the polymer had complex network structures and this phenomenon was considerably noticeable in NaCl solution. Rheology studies indicated that the polymer had good temperature and shear resistance in NaCl solution. Moreover, the apparent viscosity of the polymer solution remained greater than 80 mPa?s when 0.3 wt% UUCPAM was added at 90?C, shear rate of 170 s?1, and 20000 mg/L NaCl solution. The storage modulus increased with an increase in the polymer concentration, indicating super elasticity. Meanwhile, the number of hydrophobic micro-zones increased, forming dense spatial network structures. Drag reduction performance test showed that when UUCPAM was remained in low concentration, its drug reduction effect was better than that of PAM which demonstrated its good property as fracturing fluid.

Abstract:An organic boron crosslinkerwas synthesized by the reaction between polyamine com-pound(diethylenetriamine、1,4,7,10,13-pentaazatridecane、polyethylene-polyamines、polyethylenimine-600) and boric acid ester. Due to several boron-based crosslinking sites in this crosslinker, the amount of thickening agent used in fracturing fluid was reduced and the heat re-sistance of fracturing fluid was also enhanced. The structures of different crosslinkerswere charac-terized by FTIR 、1H-NMR and 11B-NMR, and the reaction mechanisms were discussed. Several factors including the type of polyamine compounds, the ratio between two raw chemicals, reaction temperature and time were studied.The results show that when the mass ratio of borate esterto poly-ethene polyaminewas 3:2, reaction time was 4 h, reaction temperature was 150℃, the product with the best performance was obtained and named as BNX-1. The heat and shear resistance, gel-breaking performance and static fluid-loss performance of the BNX-1 based fracturing fluid were studied. Af-ter being sheared at a shear rate of 170 s-1 for 120 min under 140℃, the fracturing fluid (guar gum 0.35%, crosslinking ratio 100:0.4) could maintain the viscosity up to 122 mPa·s. However, the vis-cosity of an industrial crosslinker (TCB-1) based system (guar gum 0.5%, cross-linking ratio 100:0.5) was 98 mPa·s via the same measurement.

Abstract:A water-soluble cationic hydrophobic monomer, N, N-dimethyl octadecyl allyl ammonium bromide, was synthesized by using 3-bromopropene and N,N-dimethyloctadecylamine in acetone. Using water as solvent, a partially hydrolyzed polyacrylamide containing high proportion of hydrophobic monomer was synthesized and aimed to be used as drag reducer agent (DRA). NMR spectrum confirmed that structure of the product was consistent with the preset and hydrophobic monomer accounted for 1%, molecular weight of the drag reducer was 1.22×107 g/mol which characterized by laser light scattering. The critical association concentration measured by the viscosity method is 0.28%. Friction of diluent solution at different flow rates in the pipeline was tested, and drag reductions (DR) were calculated by using the clear water as blank group. When the concentration of DRA is 0.13%, DR can reach up to 72%. In salt water, DR decreases. By increasing concentration of DRA, DR can be increased. When the amount is 0.2%, DR is up to 70.06%. It is known from SEM that network structure formed by DRA in water is the direct cause of the resistance reduction of DRA.

Abstract:The functional monomer (DVE) was synthesized between 1,4,3,3-tetramethyl-1,3-divinylsilazane (DVDZ) and 2,2,3,4,4,4-Hexafluorobutyl methacrylate(EINECS) via Michael addition reaction. Subsequently, The hydroxy acrylic resin secondary dispersion was prepared using methyl methacrylate (MMA) , hydroxyethyl methylacrylate (HEMA), DVE and other monomers as materials, azobisisobutyronitrile (AIBN) as intiator, isopropanol (IPA) as co-solvent and triethylamine (TEA) as neutralizer. The modified 2K-WPU which cured by polyisocyanate and DVE were characterized by means of FTIR, 1H-NMR, TG, XEM and XPS. Moreover，the effect of DVE content on the property of acrylic resin secondary dispersion and 2K-WPU films was investigated.The results showed that when DVE content was 6% (mass fraction)， the cured film had the best comprehensive performance.The characteristic decomposition temperature at 5% and 50% mass loss was 220.9℃ and 438.5℃, the water absorption was only 8.2%, and the water contact angle was 91.5°. The heat resistance，water resistance，acid resistance，alkali resistance and other performance have improved.

Abstract:The double-bonded cross-linked waterborne polyurethane was synthesized by using isophorone diisocyanate (IPDI), polyadipate-1,4-butylene glycol diol (PBA) as the main raw material and melamine as the crosslinking agent. The acrylate modified waterborne polyurethane adhesive was prepared by in-situ polymerization. The structure and properties of the polyurethanes were characterized by FTIR, XRD, DLS, DTA, electronic tensile machine and Shore hardness tester. The polyurethane performance was optimized by adjusting the mass ratio of aqueous polyurethane to acrylate and the amount of melamine added. The results showed when the mass ratio of waterborne polyurethane to acrylate was 6:4 and the mass of melamine to waterborne polyurethane was 0.53%, the degradation temperature of adhesive with 5% could reach 312 °C, water absorption rate was only 4.7%, The T-peel strength was 5.3 kN/m.

Abstract:Based on the principle of like dissolves like principle, 1,4-diamino-2,3-dicarboxylic anhydride anthraquinone was used as a raw material to prepare eight oil-soluble 1,4-diamino-2,3-phthalimide anthraquinone dyes by substitution reaction with primary amines of different carbon chain lengths. The solubility and UV absorption properties of the synthesized 8 dyes in common organic solvents were tested. The results show that the maximum absorption wavelengths of the eight products are all in the range of 669～672 nm, which is not affected by the length of the alkyl chain in the product. The oil solubility of dyes is significantly improved relative to 1,4-diamino-2,3 dicarboxylic anhydride anthraquinone. Among them, 1,4-diamino-2,3-dicarboxylic anhydride anthraquinone is insoluble in an organic solvent such as tetrahydrofuran, and the product Anthra-n-6 (n-hexylamine substituted) has the highest solubility in tetrahydrofuran which can reach 9×10-3 g/mL (25 ℃). 1,4-Diamino-2,3-dicarboxylic anhydride anthraquinone can not be used as a printing dye and Anthra-n-6 has the best printing effect. The printed density value was 1.17, and the Lab values were 79.7, -10.-2, -25.9, respectively.

Abstract:Isophorone diisocyanate (IPDI), polyoxypropylene diol (N220), polyhexane adipate diol (PNA), polyadipate-1,4-butanediol diol (PBA) as the main raw material, three waterborne polyurethane (WPU) binders were prepared. Three aqueous polyurethane films were characterized by infrared spectroscopy (IR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). Their mechanical properties and swelling properties were tested. The electrochemical performance of lithium batteries using these three aqueous polyurethanes as binders was investigated by cycles, magnifications, etc. and compared with batteries using PVDF as a binder. The results show that the tensile strength of waterborne polyurethane film with N220 as soft segment is 11 MPa, the glass transition temperature is -52 ?C, the initial decomposition temperature is 273.6 ?C, which meets the requirements of battery binder, and it is used as a binder. After 200 cycles, the capacity retention rate can reach 97.8%, which is significantly higher than the other three groups.

Abstract:Styrene-butadiene latex with high rubber content was prepared by high-low temperature composite process using butadiene and styrene. Then powdered styrene-butadiene rubber (PSBR) with uniform particle size distribution (<1 mm) was prepared by coagulation method. The coagulation mechanism and preparation technology of powdered styrene-butadiene rubber were investigated. Furthermore, the morphology of the rubber powder was observed by polarized light microscopy. The results showed that the flocculation agent, coagulant and isolating agent in the coagulation stage have the greatest influence on the morphology of PSBR. A mixture of sodium stearate, sodium oleate and simethicone was the best isolating agent. When the addition amount of sodium chloride as flocculant was 1.3% (based on the mass of latex, the same below) and that of magnesium sulfate as coagulant was 2.5%, the PSBR had uniform particle size. The prepared PSBR was used to modify 70# matrix asphalt. When the additive content of PSBR was 1% of the mass of asphalt, the softening point of the modified asphalt was 51.8℃, higher than that of 70# matrix asphalt (47.6℃). The modified asphalt prepared in this paper showed a 5℃elongation of over 100 cm, better than any market samples of powdered styrene-butadiene rubber in modifying asphalt process.

Abstract:Abstract：Cyclobutane-1,2,3,4-tetracarboxylic dianhydride（CBDA）was continuously and efficiently synthesized by photodimerization of maleic anhydride（MA）in microreactor under UV irradiation. The influences of residence time of solution in reactor tube, tube size, reaction temperature and reactant concentration on product yield were studied, which showed that longer residence time, smaller inner diameter of the tube and lower reactant concentration were found to result in higher product yield. The yield and the unit time output of product could reach as high as 51.75% and 4.64g/h under reactant concentration of 0.15g/mL, reaction temperature of 5℃ and residence time of 80 min in the reactor tube with 2.00mm inner diameter. The photoreactor has better photon utilization efficiency, uniformity of irradiation, mixability and heat transfer performance compared to traditional batch photoreactor.