Abstract:In this paper, the ultrafiltration in separation of biological enzymes was reviewed, including the principle of ultrafiltration technology, separation process as well as the effects of fermentation broth properties, ultrafiltration membranes and ultrafiltration conditions on the ultrafiltration performance of biological enzymes. Meanwhile, the recent achievements in improving the ultrafiltration performance were summarized and discussed in three aspects of fermentation liquid treatment, ultrafiltration membranes and ultrafiltration process optimization. Finally, it is considered that the future development directions of biological enzymes ultrafiltration technology are as follows: the development of ultrafiltration mathematical models; the improvement of enzyme stability; the improvement and development of ultrafiltration membranes; the improvement of ultrafiltration technology.

Abstract:Higher diols are important chemical intermediates. Especially, 1,5-pentanediol and 1,6-hexanediol are high value-added fine chemical products, which are widely used in plasticizers, advanced inks, cosmetics, medicine, light curing (UV) coatings etc. In this paper，the status of the research and development on the production of 1,5-pentanediols and 1,6-hexanediolwas described and discussed. Compared with petroleum-based approach, biomass-based approach exhibits the advantages of renewable and abundant raw materials, simplified process（2-3 steps）,highly selectivity (>90%) and environmental friendly. But the challenges lie in high catalyst cost (Pt, Rh, Re, Ir),low conversion and insufficient research on fracture mechanism of C—O bond. Therefore, Itis of great significance to develop non noble metal replacement noble metal catalysts and improve the utilization of noble metals, new efficient preparation routes and clearfracture mechanism ofC—O bond.

Abstract:Based on the fabrication materials, this paper summarized and analyzed the structure characteristics, assembly principle and method, properties and applications of organic/organic and organic/inorganic hybrid one-dimensional photonic crystals (1DPCs). For organic/organic 1DPCs, studies on the self-assembly of block copolymers with different hydrophilic and hydrophobic chain segments and the introduction of polymerizable surfactant bilayer into cross-linked polymer gel network for the preparation of one-dimensional photonic crystals are introduced. For organic/inorganic hybrid 1DPCs, both multilayer films formed by direct assembly of polymer and inorganic materials, and 1DPCs assembled with inorganic materials and then filled with flexible polymers are discussed. It can be found that 1DPCs based on polymer materials can achieve a variety of functions, and have good application prospects in flexible sensors, flexible photoelectric devices, photonic crystal paper, electronic skin, 3D printing and so on. However, the current researches on 1DPCs are limited to small-scale assemblies and the uniformity needs to be improved. So, the large-scale fabrication of uniform functional 1DPCs is an important research direction and the key to their practical applications.

Abstract:Due to the deficiency of traditional heat-insulation materials in temperature control and water -proofing fields, they cannot be used for the protection of chemicals, precision instruments and other items within accurate temperature range. Doped tungsten vanadium dioxide microcapsules( PCMs/W-VO2 ) water-based coatings were prepared by water-based acrylic resin as the main film-forming materials, PCMs/W-VO2 as the main insulation filler, and some flatting agent, anti-water agent, etc., then the coatings were coated on white cardboard. The experiment analyzed the morphology, structure, temperature-control property, water contact angle and mechanical properties by SEM, FT-IR, EDS,DSC etc.; The results show that the the phase-change temperature is 45℃, and the thermal insulation temperature difference of intelligent temperature-control packaging paper can reach 10.7℃; EDS shows that the surface of intelligent temperature-control packaging paper contains PCMs/W-VO2 microcapsules and appropriate waterproofing agent. The water contact angle is improved obviously, which indicates that the surface of coated paper has excellent hydrophobicity. FT-IR analysis shows that the near-infrared light reflectivity of intelligent temperature-control packaging paper is increased by nearly 32.0%, which compared with 78% near infrared transmittance of packaging paper. The physical properties of the paper sheet were also improved, and considering the economic factors of intelligent temperature-control coating, the optimum tensile index and tearing index were 6.84 kN/m and 22.69 mN·m2/g, respectively.

Abstract:Mg/Al-CO3-LDHs precursors were prepared by coprecipitation method from magnesium nitrate and aluminium nitrate, and then the composite modified hydrotalcites (ITA-LDHs) with the itaconic acid intercalation and titanate copling agent NDZ-201 was prepared by anion exchange method. Polypropylene (PP) composites with good flame retardancy and good mechanical properties were prepared by melt blending. The structure of ITA-LDHs were characterized by FTIR, XRD, TGA and SEM. The results showed that the CO32- was replaced partly by itaconic acid, titanate coupling agent was attached on the surface of hydrotalcites. The limit oxygen index(LOI), vertical burning test(UL-94),TGA , HRR, THR and mass loss rate indicated that with the increase of the addition of hydrotalcites, both unmodified and modified LDHs can play a flame retardant effect on PP, and the modified LDHs effect is better than that of the unmodified LDHs. When the addition of hydrotalcites are 30% (based on the quality of 100g polypropylene), the LOI value of ITA-LDHs reaches 27.5%, which is significantly better than that of the unmodified 25.5%, and the UL-94 grade reaches V0 level, which is better than that of the unmodified V1 grade. By testing the bending strength and tensile strength of the material, it can be seen that the mechanical properties of the modified hydrotalcites are obviously improved compared with the unmodified hydrotalcite.

Abstract:Abstract:A series of red phosphor Li6Zr2O7:Eu3 was synthesized by microwave solid phase sintering.The composition and luminescence properties of the samples were characterized by XRD and fluorescence photometer.The effects of sintering time, sintering temperature and Eu3 dosage on luminescence properties of fluorescent powder were investigated.The results show that the Li6Zr2O7: Eu3 is as a pure phase.According to ionic electronegativity，leading to the place of by Eu3 （1.433） will take precedence over the positisn of Zr4 (1.610) with similar electronegativity. When the sintering time is 10min, the sintering temperature is 500℃, the dosage of Eu3 is 1.12mmol, the prepared Li6Zr2O7:1.12Eu3 fluorescent powder was excited at 465nm to generate the strongest red emission at 615nm,the intensity of the emission spectrum at 615nm is 2.9 times that of excitation spectrum at 465nm. at this point,the fluorescence pink coordinate is X=0.65, Y=0.35, it has high color purity. There are potential application prospects in white LED excited by blue light.

Abstract:Fluorinated polyurethane (PUFPA) emulsions of different fluorine monomers were synthesized by isophorone diisocyanate (IPDI), polyether diol (MDEA), N-mthyldiethanolamine (MDEA), trimethylolpropane (TMP), and Perfluoroalkyl acrylate (FA) via miniemulsion polymerization. The effects of the amount of FA on the properties of the self-organized gradient structure of latex film were investigated by infrared spectroscopy, surface free energy, atomic force microscope, scanning electron microscopy and X-ray photoelectron spectroscopy. The results shows: with the increasing of the amount of FA; the surface free energy difference between the F-A (film-air) surface and the F-P (film-polytetrafluoroethylene substrate) surface of PUFPA40 % film is obvious, the cross-section of PUFPA40% film is stratifie, the fluorinated component (FPA) is enrich at F-A surface and gradient structure is more obvious when the amount of FA is 40 %; The surface contact angle (water) of the latex film F-A reached 132.5?, which increased hydrophobicity significantly, and the gradient structure of PUFPA is more obvious after being heat treatmented (110 ℃/2 h).

Abstract:The symmetrical urea substituted by Quinoline ring was synthesized by the reaction of 6-aminoQuinoline with triphosgene in the presence of triethylamine in 88% yield. This symmetrical urea reacted respectively with three type of bromoalkanes to produce three of bis-Quinolineaternary ammonium bromides a novel Gemini surfactants with Quinoline ring in 74% yield, which structure was confirmed by FT-IR, 1H NMR, 13CNMR and ESI-MS. The optimum reaction conditions for the symmetrical urea are as follows: methylene chloride as reaction solvent; mole ratio of 6-aminoQuinoline and triphosgene, 5∶1, reaction time, 6 h. The optimum procedure for the synthesis of the Gemini surfactants are as follows: DMF as solvent, 110 ℃, 8 h, mole ratio of intermediate and bromoalkane, 1∶14. The interfacial tension of the Gemini surfactants were measured in the chloroform-water system. The results show that the diffusion of the Quinoline Gemini surfactants from the chloroform solution into the chloroform-water interface is controlled by pure diffusion adsorption.

Abstract:In this study, isoelectric point precipitation method and ultra-filtration purification technique was used to purify the collagen type I extracted from bovine tendon by using acetic acid and pepsin with low temperature. Tannic acidprecipitation and SDS-PAGE gel electrophoresis demonstrated that isoelectric precipitation could effectively remove pepsin; The purified collagen type I had a maximum absorption peak at 235 nm in Ultraviolet spectroscopy; SDS-PAGE spectra showed three characteristic bands of collagen type I; The Kjeldahl method also confirmed that the collagen purity was in line with the standard(YY/T 1511-2017); Fourier transform infrared spectroscopy andcircular dichroism confirmed that the triple helix structure of collagen was completely preserved. The data means the high purity of collagen type I and the integrity of the triple helical structure can be insured by the isoelectric precipitation method combined with ultra-filtration purification technique.

Abstract:The fermentation medium and conditions of artemisinic acid produced by engineered S. cerevisiae 1211, were optimized in this paper. The yield of artemisinic acid was used as evaluation index to investigate the effects of temperature, pH, carbon source, nitrogen source and galactose concentration on the fermentation process by using single factor experiments and response surface methodology.The results showed that the production of artemisinic acid could reach 1529.7±12.6 mg/L under the conditions of temperature 30 °C, pH 5.5, sucrose 91.8 g/L, galactose 10.1 g/L, ammonium sulfate 10.3 g/L and monopotassium phosphate 8.7 g/L, which was increased by 67.1% compared with that in the initial medium. This study provided some reference for the further development of industrial production.

Abstract:To improve the imprinting efficiency of hyperoside (HYP), the theoretical calculation and UV spectral determination of HYP, acrylamide (AM), itaconic acid (IA), and its different molar ratios of HYP-AM and HYP-IA complexes were carried out by the method of density functional theory (DFT) and the experiment of ultraviolet-visible absorption spectroscopy (UV-Vis). The imprinted active sites of HYP, AM and IA were predicted by using the molecular electrostatic potential (MEP). The imprinting mechanism of the interaction between HYP and AM (IA) molecules was discussed. The results show that O11 of HYP can form strong hydrogen bonds with H9 (or H10) of AM, and H2 (or H15) of IA. While O12—H13, O15—H16, O25—H26, O27—H28, O41—H42, O44—H45, O47—H48 and O52—H53 can form strong hydrogen bonds with O7 of AM, and O4 (or O13) of IA. The high molar ratios of HYP-AM and HYP-IA complexes can increase the total interaction energy of the complex. The strength of the interaction between the active sites can be enhanced by selecting different functional monomers. The strong hydrogen-bond interaction between HYP and AM (IA) leads to partial redshifts of the absorption peak of Ⅰ, Ⅱ and Ⅳ. Moreover, the accuracy of DFT method was verified. The optimal imprinting molar ratios of HYP-AM and HYP-IA complexes were 〔n(HYP):n(AM)=1:8〕 and〔n(HYP):n(IA)=1:7〕, respectively. HYP-IA has stronger interaction with HYP-AM, and IA is a better functional monomer.

Abstract:The ultrahigh pressure extraction technology was used to extract polysaccharides from Polygonatum cyrtonema Hua. The single factor experiment and response surface method were applied to obtain optimal process parameters. Furthermore, the antioxidant activity of polygonatum polysaccharides was investigated. The results showed that the optimal extraction conditions were as follows: pressure 255 MPa, particle size of raw material 40 mesh, ratio of raw material to extraction agent 1∶17 (material refers the mass of the raw material, unit g；liquid refers to the volume of the extractant agent, unit mL ), extraction time 9.5 min, extraction temperature room temperature ，and extractant agent (water). Under these conditions, the extraction rate of polysaccharides was 25.01%. While the traditional decocting method had an extraction rate of polysaccharides of 19.83% at 100℃ for 90 min, which indicated that ultrahigh pressure extraction technology was more effective technology for extracting polygonatum polysaccharides. The scavenging ability of polysaccharides (mass concentration 1 g/L) toward 1, 1-diphenyl-2-trinitrophenylhydrazine (DPPH) free radical reached 34.14%.

Abstract:Taking deep eutectic solvent-water mixture (LAEG40) as extraction solvent, extraction yield of salidroside as main index, and extraction yield of tyrosol as auxiliary index, the effects of three main parameters solvent to solid ratio, extraction temperature and extraction time on the simultaneous extraction of salidroside and tyrosol from Rhodiola rosea L were optimized by response surface methodology. The optimal extraction conditions were obtained as follows: solvent to solid ratio of 12.05:1 (mL/g), extraction temperature of 60 ?C and extraction time of 35 min. Under these conditions, the extraction yield of salidroside reached 19.3552?0.6604 mg/g, and the extraction yield of tyrosol reached 1.7211?0.0585 mg/g, which were much higher than those of traditional solvents (water and ethanol). In order to recover the salidroside and tyrosol from the LAEG40 extraction solution, the adsorption and separation method with macroporous resin was carried out. After systematical optimization, the optimal conditions for adsorption and separation were obtained as follows: SP-825 as the adsorption resin, 30 mL LAEG40 extraction solution to 10 g SP-825, 80 % ethanol as the elution solvent, eluting volume of 40 mL, and volume flow at 1mL/min. Under these conditions, the recovery rates of salidroside and tyrosol attained to 60.47 % and 85.07 %, respectively.

Abstract:Aluminium sulphate (Al2(SO4)3·18H2O), silica sol, tetrapropylammonium hydroxide (TPAOH) and ammonium nitrate (NH4NO3) were used as the raw materials to synthesize HZSM-5 zeolite with a SiO2/Al2O3 mol ratio of 100. HZSM-5 zeolites were treated by adding TPAOH solution for secondary crystallization after pre-treating with sodium acetate solution. Pt/HZSM-5 catalysts were prepared for propane dehydrogenation by loading Pt on to HZSM-5 zeolites before and after treatment. The sam-ples were characterized by XRD, SEM, XRF, BET, NH3-TPD and H2 chemisorption. The effects of different TPAOH crystallization concentrations on the crystal structure, surface morphology, pore structure, surface acidity and propane dehydrogenation of HZSM-5 zeolites were investigated. The results showed that HZSM-5 zeolite treated with CH3COONa solution was recrystallized in TPAOH solution, which not only formed microporous-mesoporous hierarchical structure, but also modulated the surface acidity of the zeolite. If HZSM-5 zeolite is first pre-treated with CH3COONa and then crystallized for the second time in the presence of 0.3mol/L TPAOH and at 170°C for 24h, the Pt/HZSM-5 catalyst exhibited the highest initial propane conversion and propene selectivity, which were 34.2% and 99.0%, respectively.

Abstract:Metal ion and ammonium co-doped phosphotungstate were prepared and used as catalyst for the synthesis of tributyl citrate. Among them, (NH4)0.5Al2/3H0.5PW12O40 (I) showed relatively high catalytic activity and low cost. And the yield of tributyl citrate reached 97.1% with 4: 1 molar ratio of n-butanol to citric acid using 1.5% I as catalyst at 150oC in 3 h. The element composition, structure, surface acid strength and acid density of I were also characterized. The surface acid strength of I was in the range of -14.52 to -13.75, and the acid density of I reached 2.57 mmol/g, which was higher than that of traditional single cation doped phosphotungstate. In addition, the catalytic activity of I had no viewable change after 3 runs.

Abstract:In this work, sulfate-modified graphitic carbon nitride nanorods as efficient photocatalyst for H2O2 production was prepared via acid-hydrothermal method. XRD, N2 adsorption, UV-Vis, FTIR, SEM, XPS, TPD, EIS, and PL were used to characterize the obtained catalysts. Sulfate modification not only influences the morphology, structure property and optical property, but also promotes the O2 adsorption ability. Sulfate modified g-C3N4 catalyst shows the H2O2 concentration of 2.7 mmol•L-1, more than 2.7 time higher than that of neat g-C3N4.

Abstract:The Zr-SBA-15 catalysts with different Zr/Si ratio were prepared by one pot method using te-traethoxysilane and zirconium dinitrate oxide as precursors. The effects of Zr/Si ratio on the structure, tex-ture, surface acidity and catalytic performance of Zr-SBA-15 catalysts for the (Meerwein-Ponndorf-Verley) MPV transfer hydrogenation of cinnamaldehyde were investigated, by means of N2 physical adsorption, X-ray powder diffraction, NH3 temperature-programmed desorption and pyridine in situ infrared. The re-sults show that the prepared Zr-SBA-15 catalysts exhibited regular hexagonal mesoporous structure with L acid as the main surface acid center. With the increase of Zr/Si mole ratio, the most probable pore size of Zr-SBA-15 catalyst decreased gradually, the amount of L acid increased continuously, and the amount of B acid changed lightly. The cinnamaldehyde conversion increased first and then tended to be stable. The selectivity of the target product cinnamol increased, while selectivity of the by-product 1- benzene propyl-ene-2-propyl ether decreased. When the Zr/Si mole ratio was 0.1, the Zr-SBA-15 catalyst showed the op-timal catalytic performance: the conversion of cinnamaldehyde reached 96.2%, and the selectivity of cin-namyl alcohol was 95.2%. The conversion of cinnamaldehyde kept over 90%, and the selectivity of cin-namyl alcohol was above 95% after 8 times cycle application experiment.

Abstract:Three kinds of Pd1Ni1/ACx (x=3,5,7) catalysts were synthesized by precipitation co-reduction method with carbon black pretreated with different concentrations of potassium permanganate solution as the carrier, and the best catalysts for electrocatalytic performance were screened. Commercial Pd/C catalyst was as comparison. The physical characterizations (XPS, ICP and TEM) show that Pd1Ni1/AC5 have the largest Pd loading(3.66%) and the smallest average particle size(4.71 nm) of Pd grains which were homogeneously dispersed on carbon black support, so this catalyst has more active sites than the other two; XRD shows that Ni in all three Pd1Ni1/ACx catalysts exist in an amorphous form. In the electrochemical performance test, all three catalysts showed better electrochemical stability and survival than commercial palladium carbon; Pd1Ni1/AC5 had the largest electrochemical active surface area (62.21 m2/gPd) and the best ethanol catalytic activity (1797.85 A/gPd) which is superior to palladium carbon catalyst.

Abstract:A novel poly (ethylene glycol) grafted 4-dimethylaminopyridine dicationic functionalized ionic liquid ([DMAP-PEG1000-DIL][BF4]) was synthesized with water-soluble polymer poly (ethylene glycol) as raw material. Its structure and thermal stability were characterized by 1HNMR, 13CNMR, FTIR, ESI-MS and TGA. A series of 4H-chromen-4-yl-phosphonates in yields of 83%~94% were prepared by one-pot, three-component reactions of different substituted salicylaldehyde with malononitrile and triethyl phosphite in water under the conditions of [DMAP-PEG1000-DIL][BF4] dosage being 10 mol% different substituted salicylaldehyde and reaction temperature 100℃. This reaction used water as solvent and the catalyst could be reused for five times, which met the basic requirements of green chemistry.

Abstract:In this paper, the ZSM-5 zeolite was synthesized using coal-series kaolin as material, sodium silicate, fumed silica, silicon acetate and silicic acid as silicon sources, sodium hydroxide as mineralizer and tetrapropylammonium hydroxide as template. Then, HZSM-5 was synthesized by exchanging ion in ammonium chloride. The HZSM-5 samples were characterized by XRD, SEM，FTIR, NH3-TPD and BET. Finally, the catalytic performance of HZSM-5 samples were evaluated by Methanol to Gasoline(MTG) reaction. The results indicate that the HZSM-5 molecular sieve synthesized from silicic acid has an excellent catalytic performance, starting to deactivate at 43 h after MTG reaction, and the selectivity of higher hydrocarbons products was 38.99%.

Abstract:Acidic mesoporous ZSM-5 zeolite (HZSM-5-M) and silica (SiO2) supported Ni2P catalysts (Ni2P/HZSM-5-M and Ni2P/SiO2) were prepared by incipient wetness impregnation method, and their catalytic performance was investigated in the selective hydrogenation of phenylacetylene. The supports and catalysts were characterized by XRD, N2-adsorption, NH3-TPD, H2-TPR, SEM and TEM techniques. The activity results show that phenylacetylene conversion on Ni2P/HZSM-5-M catalyst is 98.5%, while that on Ni2P/SiO2 catalyst is 45.6% at the reaction time of 2 h, indicating that the hydrogenation activity of Ni2P/HZSM-5-M catalyst is much higher than that of Ni2P/SiO2 catalyst. This feature could be due to the highly dispersed Ni2P phase with small particle size on the catalyst. In addition, the Ni2P/HZSM-5-M catalyst showed good repeatability.Ni2P/HZSM-5-M catalyst, as compare to Ni2P/SiO2 catalyst. The Ni2P phase with small particle size shows high hydrogenation activity, nevertheless, the influence of the particle size of the Ni2P phases on the styrene selectivity is not significant.

Abstract:CuO/ZnO/Al2O3 catalysts with mesoporous Al2O3 as support were prepared by precipitation-deposition method using cupric nitrate and zinc nitrate as raw materials. Catalysts possessing different active component morphologies (globular clusters and rod-like structure) were obtained by changing calcination time and used for CO/CO2 hydrogenation reaction. The catalysts were characterized and tested by XRD, BET, N2 adsorption-desorption, TEM, H2-TPR, CO2-TPD, NH3-TPD and FTIR. The results showed that the morphology of the active components affects the CuO grain size, specific surface area, pore size and reduction performance of the catalyst and has a great influence on the relative quantity of acid sites and basic sites of the catalysts. The catalyst with globular clusters has high dispersion of active components, easy to reduce, more basic sites and less acid sites, which is favorable for the formation of methanol. While the rod-like catalyst has uneven pores, less basic sites and more acid sites, which is more conducive to the formation of dimethyl ether (DME). The activity test results revealed that the catalyst with globular clusters exhibited high methanol selectivity (95.05%) and low DME selectivity (4.18%). The rod-like catalyst displayed the opposite trend with high DME selectivity (75.41%) and low methanol selectivity (12.81%).

Abstract:Osimertinib mesylate in a total yield of 41.9% was obtained via four steps of substitution, condensation, reduction and amidation, and salt formation with 3-(2-chloropyrimidin-4-yl)-1-methylindole as raw material. The key parameters of each step were optimized by single factor experiment and a fast and efficient synthetic route was obtained. The “one-pot method” used in the process of reduction and amidation not only simplifies the operation steps, but also solves the problem that the intermediate product is unstable and difficult to separate and purify. And the yield of osimertinib from Ⅴ reached 61%, higher than that reported in the literature (33%). Besides, in this process, acryloyl chloride was replaced by cheap acrylic acid, which not only reduced costs, but also made the reaction conditions milder and easier to operate.

Abstract:In order to discover new compounds with high bactericidal activity and broad inhibition, fifteen series of new 2-substituted-4-chloro-5-aryl-2H-1,2,3-triazole derivatives were synthesized using aryl aldehyde, nitromethane and sodium azide as starting materials through cyclization, chlorination and alkylation reactionin. The structures of title compounds were confirmed by 1H NMR, 13C NMR, mass spectra and elemental analyses. The in vitro antifungal activities of target compound were evaluated against six phytopathogenic fungi (Gibberella zeae, Phytophythora capsici, Alternaria alternate, Botrytis cinerea, Rhizoctonia solani and Sclerotonia sclerotiorum) using the mycelium growth rate method under the test concentration of 25 mg/L. The results of bioassay showed that some compounds exhibited excellent fungicidal activities. For example, the inhibition rates of compound 4d against Gibberella zeae, Botrytis cinerea and Sclerotonia sclerotiorum were 70.4%, 74.1% and 72.9%, respectively. The inhibition rates of compound 4k against Botrytis cinerea and Sclerotonia sclerotiorum were 87.0% and 84.7% respectively. The inhibition rate of 4d against Phytophythora capsici was 61.4%, which was higher than that of commercial difenoconazole 42.5%.

Abstract:Polycarbonate-based polyurethane (PCPU) was prepared using polycarbonate (PC) and 4,4-dicyclohexylmethane diisocyanate (HMDI) as the main raw materials. Fourier transform infrared spectroscopy (FT-IR), tensile machines, and simultaneous thermal analyzers were used to characterize the structural, mechanical, and thermal stability of the synthesized polyurethanes. The electrochemical stability window, ac impedance, rate and cycling performance of the cells were tested. Compared with the traditional PVDF binder, the electrode prepared with PCPU binder has a higher peel strength of 0.21 N/cm; the assembled SS/PCPU/Li half cell does not occur significant electrochemical oxidation decomposition within the voltage range of 0 to 5V. The battery fabricated by the cathode with the mass ratio of LiFePO4: SP: PCPU = 60:20:20 showed the best comprehensive performance with the discharge capacity of 143 mAh g-1 at 1C at 60? C，the capacity retention reached 97 % at 0.2C after 50 cycles, which show the excellent electrochemical performance.

Abstract:By solvent thermal method, Fe-based MOFs (MIL-53) with terephthalic acid (H2BDC) as ligand was prepared. When chrome tanning agent was used as main tanning agent and weight at 3% tare (as for Cr2O3 is 0.75%), ultrasonic MIL-53-Fe was used as retanning agent and weight as 2% tare, the shrinkage temperature reached 101.8 ℃, reducing the dosage of chrome tanning agent 40%, tanned leather thickening rate reached 18.1%, the tensile strength reached 29.56 MPa, the elongation at break was 89.77%, the tannage leather performed a good water resistance and high absorption rate of chrome tanning agent. When the MIL-53-Fe have tanned leather alone, the shrinkage temperature reached 72.5 ℃, compared with the acid skin, there is a certain improvement, showing certain tanning. Experiments show that MIL-53-Fe can used with chromium tanning agent, improving the performance of washed leather,the rest of MIL-53-Fe can adsorb the organic waste in wastewater, and reduce the content of harmful substances in wastewater, which owns a good meaning in lesser chromium tanning and reducing the polluting of wastewater.

Abstract:Sodium hypochlorite (NaClO) was synergistically activated with Peroxymonosulfate (PMS) and ozone (O3) to treat simulated printing and dyeing wastewater. The indicators are the degradation rates of dyes such as Rhodamine B (RhB), Reactive Brilliant Blue (Knr), Reactive Red (X-3B), and Methyl Orange (MO). UV-visible absorption spectroscopy analysis method is used to explore the influence of factors such as the ratio of material mass, pH, Cl-, NO3-, SO42-, and HCO3- in wastewater. The results show that the ratio of the optimum mass of NaClO-PMS and NaClO-O3 systems are n(NaClO): n(PMS)=1:1 and n(NaClO):n(O3)=2:3, which have good degradation of RhB at the pH of 3-11 and 3-9, respectively. The NaClO-PMS system has better degradation of RhB under acidic conditions, the degradation rate reaches 96.18% at pH=3. The NaClO-O3 system has a good degradation effect on RhB under the neutral pH con-dition, and the degradation rate reaches 97.91% at pH=7. The concentration of anions have a little influ-ence on the treatment effect of printing and dyeing wastewater by NaClO-PMS or NaClO-O3 system.

Abstract:Using acrylic acid (AA) and chitosan (CTS) as raw materials and ascorbic acid (VC) as reducing agent instead of traditional amine reductant, the contunious ion exchange adsorption medium rich in -COOH group and -NH2 group was prepared by one step copolymerization. The polymerization time was shortened from 18 hours reported in literature to 5 hours. The optimum polymerization parameters were as follows: the total mass fraction of initiator was 0.75%. The mass ratio of VC to APS was 0.5, the total mass fraction of monomer was 7%, the mass ratio of CTS to AA was 0.2, and the mass fraction of cross-linking agent was 1.05%. The pore structure of p(AA-co-CTS) adsorption medium prepared was continuous and the pore size scale was 100~500μm. The abundant groups of -NH2 and -COOH on the inner surface of p(AA-co-CTS) adsorption medium had strong adsorption capacity for polypeptide. The relationship between mass transfer parameters and adsorption operation conditions was studied by number of mass transfer units (NTU) method. The optimum adsorption operation conditions were determined as follows: the flow rate of adsorption liquid was 3~4 mL?min-1, the adsorption temperature was 293.15K, the feed concentration was 400~500 mg?L-1, and the maximum dynamic adsorption capacity was 74.5~79.4 mg?g-1. The amphoteric separation medium has continuous pores and can be directly used to adsorb active polypeptides from enzymatic hydrolysate of marine fishery resources. It can replace the traditional adsorption unit operations such as filtration, centrifugation and bulk resin chromatography.

Abstract:Temperature-resistant and salt-tolerant polymer microspheres (AMPST) were prepared by inverse emulsion polymerization using acrylamide (AM), acrylic acid(AA), 2-acrylamide-2-methyl propane sulfonic acid (AMPS) and -methyl styrene (α-MSt) as monomers. And the synthesis process of microspheres were optimized. The structure and performance of AMPST microspheres were characterized by FTIR, GPC, optical microscope, SEM, TG, rheological analyzer and core plugging experiments. The results showed that temperature and AMPS content were closely related to the initial particle size of microspheres, and temperature and initiator content determined the expansion ratio of microspheres. When the hydration temperature was 65℃ and the salinity of simulated formation water was 2.8937×103 mg/L, reaction temperature 50℃, mass of AMPS 12g, the average initial particle size of AMPST-8 microspheres was 2.01 μm, and 18.45 μm after 240 hours of hydration, with an expansion ratio of 8.18. Furthermore, AMPST-8 microspheres had smooth surface, large specific surface exhibited an aggregate state. Core plugging experiments showed that the residual resistance coefficient of AMPST-8 microspheres was 8.4 and the plugging rate was 88% after 7 days of hydration expansion in the core, higher than other microspheres provided on site. After 7 days of hydration expansion, the residual resistance coefficient and plugging rate of pilot plant product, ZS-2 microspheres were 7.8 and 87.24%, respectively.

Abstract:The demulsification performance of 3 fluorinated multi-block copolymers with dumbbell-shaped structure (FMCDSs) containing different hydrophilic polyethylene glycol (PEG) segment in diesel/water emulsion were investigated, and compared with the demulsification performance of polyether demulsifiers and dumbbell-shaped polyglycerol-PEG polymers. The results show: FMCDSs have better demulsification performance than hydrocarbon polymers; the chain length of PEG has a significant effect on the demulsification performance, and the FMCDSs with PEG-4000 as hydrophilic segments separated 95% oil from the emulsion within 30 min at a dosage of 300 mg/L(30℃). In addition, based on the results of interfacial tension and interfacial dilation rheology measurements, it can be found that FMCDSs can effectively adsorbed to the diesel-water interface, and the fluorined groups are the major factor in producing good demulsification properties.

Abstract:Diethanolamine and maleic anhydride were used as the starting materials to to synthesize hyperbranched unsaturated poly (amide-ester) HP. The anionic-nonionic hyperbranched surfactant HPSA-4 was synthesized by the esterification of succinic acid monolauramide sulfonic acid and HP. The HPSA-4 and characterized by Fourier transform infrared (FTIR), 1HNMR and GPC。The CMC, SFT, IFT, wetting properties, anti-aging properties under high temperature and high salt, emulsifying properties and oil displacement of HPSA-4 were tested. The results showed that the cmc of HPSA-4 was 0.162 g•L-1, γcmc=23.4mN/m, δcmc=0.07mN/m. Under high temperature(150℃) and high salt(ωNaCl=2*105mg/L), the surface tension is about 25mN/m after aging 15 days. Besides, HPSA-4 has good wetting properties and wetting reversal properties. Moreover, the emulsification performance of HPSA-4 is comparable to that of sodium dodecyl sulfonate, but its emulsification performance under high salt(ωNaCl=8*104mg/L，ωCaCl2 =104mg/L) is superior to that of sodium dodecyl sulfonate. The core flow test indicate that 0.3g/L HPSA-4 can improve EOR about 5.3% on the basis of water flooding when the injection volume is 0.5 PV. All the above studies indicate that HPSA-4 can be used as an oil displacement agent in high temperature and high salinity oilfield.

Abstract:The corrosion inhibition of PBA on the Q235 steel in 1 M hydrochloric acid solution and its adsorption behavior on the Q235 steel surface were studied by means of weight loss method, electrochemical tech-nique and atomic force microscope (AFM) observation. Results show that PBA is a mixed inhibitor that inhibits both cathode and anode. the inhibition efficiency increases with the increase of PBA concentra-tion, and decreases slightly with the increase of temperature, when the mass concentration of PBA is 80 mg/L, the inhibition efficiency is the best. The adsorption of PBA on the carbon steel surface is exothermic, following the Langmuir's adsorption isotherm, which is a mixed adsorption based on chemical adsorption. PBA formed a compact protective film on the steel surface, which greatly hindered the steel corrosion. The inhibition mechanism of PBA was analyzed by quantum chemical method, these results indicate that the active sites of PBA are concentrated on the benzene ring and the heterocyclic ring, and the ability of PBA molecules to accept electrons is greater than the ability to provide electrons.

Abstract:In order to improve the hydrophobicity of waterborne flame retardant coatings, epoxy resin (EP) was used as coating material to encapsulate the flame retardants (ammonium polyphosphate, melamine and pentaerythritol) by single component modification and mixed component modification respectively. The surface groups of the flame retardant were analyzed by FTIR and the microstructure was observed by SEM. The contact angle of the flame retardant was measured and the particle size distribution was analyzed. The flame retardant and water-borne flame retardant coatings were tested by TG, respectively. The water resistance of the coatings was tested by the national standards GB/T 1733-93. The results show that: the flame retardants prepared by the two processes are coated with EP, and the optimum content of EP is 15wt%; with the decrease of the solubility of the flame retardants, the contact angle increases, and the water resistance of the waterborne flame retardant coatings is significantly improved; in addition, the flame retardant is more efficient by mixing components; The crosslinking of ammonium polyphosphate and EP results in unsaturated carbon-rich structure, which strengthens the stability of carbon skeleton and increases the quality of coating residues.

Abstract:A heterogeneous catalytic system has been developed for synthesis of heteroaryl-substituted triphenylamine derivatives via a Pd/C-catalyzed aerobic and ligand-free Suzuki-Miyaura reaction of heteroaryl halides with 4-(diphenylamino)phenyl boronic acid (DPBA) in aqueous media. The reaction conditions (solvent, base, temperature and Pd/C loading) were optimized using a model cross-coupling reaction between 2-bromopyridine and DPBA. The optimal conditions were: 2-bromopyridine (0.25 mmol), DPBA (0.375 mmol), Pd/C (1.5 mol%), ethanol/water (4 mL, volume ratio of 3:1), K2CO3 (0.5 mmol) and 80 °C. Twelve triphenylamine derivatives were prepared with yields of 54-99% under the optimal conditions. The structures of the products were confirmed by 1H NMR. The reaction was performed under aerobic and aqueous conditions, and the catalyst was easily separated and recovered, therefore, this protocol is convenient and environmental benign for the preparation of important heteroaryl-substituted triphenylamine derivatives.

Abstract:(1S, 3R)-methyl 1-(4-(methoxycarbonyl)phenyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3- carboxylate hydrochloride, the key intermediate of RSL3, was synthesized by an efficient and parctical method from D-Tryptophan through a two-step reaction, involving esterification and Pictet-Spengler reaction. The Pictet-Spengler reaction conditions were investigated, and the optimal conditions were as follows: the molar ratio of D-tryptophan methyl ester hydrochloride and methyl 4-formylbenzoate is 1:1.1, the mixture was stirred in acetonitrile and refluxing for 6 h. The trans-isomer (RSL3 intermediate) was obtained by suction filtration. The structures of intermediate and the product were confirmed by 1HNMR, 1H-1H NOESY and ESI-MS.