Abstract:A temperature and pH dual sensitive P(DEA-co-DMAEMA)/Na2WO4 hydrogel was synthesized by one pot method with N,N-diethylacrylamide (DEA) and dimethylaminoethyl methacrylate (DMAEMA) as monomers, N,N-methylene bisacrylamide (BIS) as a crosslinking agent, respectively. The effect of Na2WO4 on the structure, temperature and pH response of hydrogels was investigated. The results showed that there existed a physical cross-linking (hydrogen bonding and coordination) between Na2WO4 and polymers in addition to chemical cross-linking in composite hydrogel. Futhermore, the LCST of the composite hydrogel decreased linearly with the increasingof Na2WO4 content. When the Na2WO4 content increased from 0 to 3%, LCST decreased from 41.6?C to 34.4?C. Besides, the composite hydrogels exhibit double pH response properties: it highly swelled under acidic conditions, then the swelling ratio decreased under neutral conditions and increased again under alkaline condition.

Abstract:Tin antimony oxide-graphene oxide (ATO/GO) sheet hybrids are fabricated using GO as a precursor, then anchoring ATO on GO sheets with the help of 3-aminopropyltriethoxysilane. Scanning transmission electron microscope (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) are performed on the resultant composites. By using ATO/GO as fillers, the effect of ATO/GO content on the anticorrosion and antistatic properties of waterborne epoxy coatings (AE) are researched. The results show that the surface resistance of composite coating increase as ATO/GO content is increasing. When m (ATO/GO) =3wt%, water vapor transmittance of coating decrease to 62.13g/(m2?h) , and has lowest corrosion current density (Icorr=3.73E-9 A/cm2) and Maximum corrosion voltage (Ecorr=-0.19926v), anticorrosive efficiency increased by99.95% compared with blank sample.

Abstract:ω-Chloromethyl longifolene (Ic) was synthesized via halogenation of ω-hydroxymethyl longifolene (Ib) with thionyl chloride as halogenating reagent and structurally characterized by means of FTIR, 1HNMR，13CNMR and HRMS (ESI). There were obvious effects of reaction temperature, reaction time and material ratio on the halogenations reaction. Under the optimum reaction conditions (85°C, 6h, molar ratio for thionyl chloride: compound Ib=1.10:1.00), the yield of compound Ic was up to 94.2%. The preliminary biological activity test showed that Ic could obviously inhibit the growth of two bacteria (staphylococcus aureus and Canidia Albicans) and one fungus (Klebsiella pneumonia) with MIC 31.25, 62.5, and 125mg/L, respectively, comparing with 500mg/L of MIC of longifolene. It was found that Ic exhibited obviously higher antimicrobial activity, which was associated with its lower HOMO (highest occupied molecular orbital)/LUMO (lowest unoccupied molecular orbital) energy gap (0.063 a.u), comparing with that of longifolene (0.256 a.u) calculated using the density function theory (DFT) at B3LYP/6-31G level.

Abstract:The walnut shell grafted polyacrylamide or poly(methyl methacrylate) were prepared using AGET ATRP by walnut shell macroinitiator and monomer (acrylamide or methyl methacrylate) in the catalytic system of FeCl3•6H2O/PPh3 and Vc. The structure and appearance of composite material was characterized by FTIR, TG and SEM. The adsorptive properties of walnut shell-g-polyacrylamide or poly(methyl methacrylate)for metal ions were evaluated. The adsorptive capacity of composite materials was higher than walnut shell for Pb(II) and Cu(II). The results indicated that the maximum adsorption capacity was 40.5, 48.5 mg/g at 293 K and pH 5. 0 when an initial concentration of Pb(II) was 50 mg/L. Kinetic and isotherm studies of Pb(II) revealed that adsorption data followed the pseudo-second-order kinetic model and the Langmuir isotherm. The minimum desorption rate of Pb (II) was 93.4% and 93.1% for 4 times of regeneration. It showed that the materials had better regeneration capacity.

Abstract:By using the F127((EO)106(PO)70(EO)106) as the template agent,methyl silicate(TMOS) as the silicon source and the avermectin as the model drug, the avermectin/mesoporous silica(HOMS) was prepared in the method of one-step synthesis.Copper ion, zinc ion and manganese ion were used during the synthetic process in order to form coordinate bond between avermectin and mesoporous silica,and thus,three kinds of pH-responsive slow-released systems(AVM/Zn-HOMS, AVM/Cu-HOMS and AVM/Mn-HOMS) were build up.The materials’ structures were systematically studied using Fourier transform infrared spectroscopy(FTIR),N2 adsorption-desorption, scanning electron microscopy(SEM) and thermogravimetric analysis(TGA) measurements, and the release behaviour under different pH values was also studied.The results showed that, stratiform structure, multihole structure and bubble structure were observed on the surface appearance of AVM/Zn-HOMS,AVM/Cu-HOMS and AVM/Mn-HOMS, respectively. Compared with AVM/HOMS, the surface areas of AVM/Zn-HOMS, AVM/Cu-HOMS and AVM/Mn-HOMS had an enlargement about 308.581,101.218 and 318.011 m2/g,respectively.The N2 adsorption-desorption isotherms of the systems were H1 hysteresis loops of the type LangmuirⅣ. AVM/Zn-HOMS and AVM/Cu-HOMS showed obvious pH responsiveness, while AVM/Mn-HOMS didn’t exhibited obvious pH responsiveness. The release process could be described by Higuchi kinetic model. The diffusion mechanism dominated the release process.

Abstract:In the extraction of crude oil to a series of sections produced a large number of sludge, if not treated, will cause serious harm to the environment. Due to the complexity of its composition, it is extremely difficult to study the physical and chemical processes at its interface, so flocculation mechanism is still at the exploratory stage. According to the sludge treatment process, the common flocculation process Summed up and different the main flocculation mechanism and the advantages and limitations of the analysis, In this paper, it summarized the process of common flocculation process according to the sludge treatment and analyzed advantages and limitations in terms of the different main flocculation mechanism. A popular view on flocculation mechanism is adsorption bridging, network scanning, etc. As for micro-organisms flocculation, the mechanism is extracellular cellulose fibrils, Sticky, capsule, extracellular polymer bridging, electrical neutralization, etc, Finally, the prospect of flocculant is prospected.

Abstract:Network polyurethane shell microencapsulated phase change materials (MicroPCMs) was successfully prepared by interfacial polymerization method using isophorone diisocyanate (IPDI) and triethanolamine (TEA) as monomers. The effect of different core/wall ratio on the surface morphology and particle size distribution of microcapsules was investigated, and the effect of TEA dosage on the surface morphology, chemical structure, thermal stability and compactness of microcapsules was also investigated. The results show that the prepared microcapsules were spherical with smooth and contact surface, and the surface cave of microcapsules disappeared when the core/wall ratio was greater than 3:1. When the core/wall ratio was 3:1 and the TEA dosage was 3.5g，the MicroPCMs has good thermal stability and compactness which can withstand high temperature of 200℃, and the mass loss rate was less than 6.2%wt after drying at 120℃ for 6h. The MicroPCMs have obviously thermal energy storage performance, and the melting temperature and melting enthalpy were 22.5℃ and 86.37J?g-1 respectively.

Abstract:Carbon-coated LiMnVO4 nanomaterials with different carbon mass fraction were synthesized by a combined sol-gel reaction and hydrothermal process, using LiAc•2H2O, Mn(Ac)2•4H2O, V2O5 and H2O2 as raw materials and glucose as carbon source. The morphology and structure were characterized by SEM、TEM、XRD、Raman、EDS、TG. The results indicated that the as-prepared samples presented cubic crystal structure, and had good dispersibility after carbon coated. Electrochemical measurement results confirmed that carbon-coated LiMnVO4 nanomaterials with different carbon mass fraction (0%, 5%, 10% and 15%) as anode materials for LIBs delivered initial reversible capacities of 682, 686, 696 and 580 mAh/g under the same conditions, remained 226, 336, 513 and 440 mAh/g after 60 cycles. Hence, carbon-coated LiMnVO4 nanomaterials with 10% carbon mass fraction have better cycling stability and higher reversible capacity than others．The appropriate carbon mass fraction not only increases the interface stability of nanomaterials, inhibits the growth and agglomeration of grains, but also improves the electronic conductivity of composite electrode materials.

Abstract:A novel organic-cobalt ternary macrocyclic compound HL-Co was constructed by cobalt ion with (N,N′)-5-(dibenzylamino)-N1(E),N′3(E)-bis(quinolin-2-ylmethylene)isophthalohydrazide, which was synthesized by introduction of quinoline and dansylamide groups into 5-aminoisophthalic acid. The recognition process of glutathione was studied with HL-Co by electrospray ionization mass spectrometry (ESI-MS) and ultraviolet spectroscopy (UV-vis). The results show that HL-Co forms a stable [3 3] macrocyclic structure in solution and can encapsulate glutathione at molar ratio of 1: 1. The absorbance at 320 nm was gradually increased when the glutathione was added to the solution of HL-Co, and the absorbance at 425 nm gradually decreased until the equilibrium. The isobestic point at 357 nm was obtained. An equilibrium constant log K(GSH) of 4.41 was calculated by fitting of Benesi-Hildebrand data. The minimum detection limit of glutathione was 1.0?10-5mol/L. It indicated that HL-Co has good recognition property on glutathione.

Abstract:The bulk carbon materials were prepared via solidification, molding and pyrolysis using thermosetting phenolic resin as raw materials. The effects of pyrolysis temperature and FeCl3 catalyst on micro morphology, ordering degree and electromagnetic interference shielding effectiveness (EMI SE) in X-band of phenolic resin pyrolytic products were investigated through X-ray diffraction, TG-DSC, laser Raman spectroscopy and scanning electron microscopy. The results show that the final pyrolytic products of phenolic resin were amorphous carbon. The TG-DSC results indicate that the carbon yield of the phenolic resin pyrolyzing at 1000℃ was 55%. The ordering degree and the conductivity of phenolic resin pyrolytic products increased with pyrolysis temperature rising, and the EMI SE first increased then decreased. The EMI SE of sample pyrolyzing at 900℃ was 28.2dB. Large amounts of in-situ multi-walled carbon nanotubes grew and formed the conductive network in the phenolic resin pyrolyzing at 1000℃ with 0.5wt% FeCl3. These led to a high EMI SE. The EMI SE of phenolic resin significantly increased pyrolyzing at 1500℃ with 0.5wt% FeCl3, especially in low frequency.

Abstract:A flexible polymer membrane was synthesized by a emulsion polymerization with methyl acrylate (MA) and acrylonitrile (AN) as monomer and polyvinyl alcohol (PVA) as stabilizer. The physicochemical property of the resultant materials were characterized by fourier transform infrared (FTIR), scanning electron microscopy (SEM), mechanical strength measurements, thermal analysis, electrochemical impedance spectroscopy (EIS) and charge-discharge test. The results showed the mass ratio of MA to AN was 23:2, the polymer membrane possessed mechanical strength of 14.3MPa and elongation of 248%. And the ionic conductivity of the flexible electrolyte is 0.95 mS cm?1 at 25oC.The electrochemical performances were characterized using the S2 membrane as a separator, LiCoO2 and graphiteas cathode and anode, respectively. The battery initially delivers an initial discharge capacity of 140 mAh g?1 based on the LiCoO2active material in the cathode, 307 mAh g?1 based on graphite in the anode, and 132.7 mAh g?1and 323mAh g?1 after 50th cycle, respectively. The results indicate that the flexible polymer membrane demonstrates satisfactory electrochemical performances.

Abstract:α-CE/KGM composite hydrogels were prepared by mixing konjac glucomannan (KGM) and α-cellulose (α-CE) in different proportions to improve the thermal stability and gel strength of KGM hydrogels. We used the Rotational Rheometer to research the influence of different quantities of α-CE on the rheological properties of the KGM gels.The surface morphology, characteristic functional groups, thermal stability and microstructure of α-CE/KGM hydrogels were characterized by scanning electron microscope (SEM), infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC). Result reveals that the viscosity of KGM sol and α-CE / KGM sol decreases with the increase of shear rate. In the range of 0 to 300s-1, the shear stress increases with the increase of shear rate. At the selected frequency in the range of 0.1 to 100 Hz, the storage modulus G' of α-CE / KGM is lower than its loss modulus G'', and the addition of α-CE increases the modulus. Especially when m(α-CE):m(KGM)=1:1 (α-CE4), the melting absorption peak is 122.3℃, and the thermal stability is improved.

Abstract:Aniline/silicone-acrylate(Ani/SiAc) copolymer emulsion was prepared by emulsifier-free emulsion polymerization through grafting aniline(Ani) on vinyltrimethylsilane(VTMS) modified acrylate latex particles. The emulsion was characterization by FTIR and TEM, the anticorrosive property of its latex film was studied by polarization curves and electrochemical impedance spectra (EIS). The effect of temperature and the molar ratio of H2O2 and Ani to the anticorrosive property were discussed. The results showed that the electrochemical impedance value of Ani/SiAc copolymer latex film was 9.03×107 Ω•cm2 and the corrosion current density was merely 5.04×10-8 A/cm2 when the react temperature was 20°C for 6 h firstly, then 80°C for 2 h, and n(H2O2): n(Ani) was 2.5:1.

Abstract:In this paper, Li4Ti5O12@C was prepared by in-situ composite method using glucose as carbon source. The effect of different carbon content on Li4Ti5O12 was investigated. The structure and surface morphology of the composites were characterized by X-ray diffraction and scanning electron microscopy. The electrochemical performance was measured by constant current charge-discharge and electrochemical impedance spectroscopy. The results show that Li4Ti5O12 coated with 3 % carbon is homogeneous and has the best electrochemical performance. Its first discharge capacity is 185.9 mAh/g, and remains 161.5 mAh/g after 50 cycles at the charge and discharge rate of 0.5 C. Its first discharge capacity is 99.9 mAh/g, when disharged at 2.0 C.

Abstract:Isotactic polypropylene (iPP) and N, N’-bis(benzoyl) sebacic acid dihydrazide (TMC-300) blends were prepared by means of melt blending. The effects of TMC-300 on the crystallization and melting behaviors, crystal structure and mechanical properties of iPP were studies by DSC, XRD, SEM, POM and mechanical test. The results showed that the addition of TMC-300 had a significant nucleation effect on iPP. When the weight fraction (w) of TMC-300 was 0.6%, the crystallization temperature of iPP increased from 117.2℃ to 126.9℃, and the nucleation efficiency reached up to 56.3%. Pure iPP exhibited a half-time of crystallization (t1/2) of 4.85 min when isothermally crystallized at 130℃, however when w(TMC-300) was 0.2%, the value of t1/2 became 0.52 min and decreased by nearly 89%, indicating that the crystallization rate of iPP increased rapidly after adding TMC-300. Meanwhile, the crystal structure of iPP did not change with the incorporation of TMC-300. Moreover, the impact fracture surface of iPP with addition of TMC-300 showed obvious characteristics of multi fold ductile fracture. When w(TMC-300) was 0.2%, the elongation at break of the composites increased from 674.8% to 833.2% and the notched impact strength increased from 32.5 J/m to 43.2 J/m, which indicated that the addition of TMC-300 could effectively improve the toughness and plasticity of iPP. Finally, the effects of TMC-300 on the crystallization and mechanical properties of iPP were compared with that of nucleating agent TMC-328 and HPN-68L. When w(TMC-300) was 0.2%, the crystallization temperature was 126.2℃, which was slightly higher than that of 0.2% TMC-328 (125.2℃), and the notched impact strength (43.2 J/m) was 15.8% higher than that of 0.2% HPN-68L (37.3 J/m).

Abstract:Abstract：Low-powered up-conversion is a technique that low-energy light (long-wavelength) was absorbed by sensitizer and then high-energy light (short-wavelength) was emitted by the acceptor in the binary system, based on the triplet-triple annihilation mechanism. In order to enhance low-powered upconversion efficiency, a series of cyclodextrins (CD) such as -, - and -CD were firstly used to envelope the acceptor (2-chloro-9,10-xylene anthracene, DTACl) in the presence of sensitizer 5,10,15,20-tetraphenylporphyrin palladium (PdTPP) or 5,10,15,20-tetraphenylporphyrin platinum (PtTPP), which the ternary systems were formed. The results showed that -CD with appropriate cavity radius can effectively improve the fluorescence quantum efficiency (f) of DTACl and that sensitizer (PdTPP) with longer triplet lifetime is in favor of triplet-triplet energy transfer (TTT. As a result, the upconversion efficiency for ternary system (PdTPP/DTACl/-CD) was enhanced. Under the excitation of 523 nm diode laser (60 mW/cm2), bright green-to-blue upconversion was observed with the efficiency (UC) as high as 12.82%. With the help of Pt/WO3 photo-catalyst, the conversion from coumarin to 7-hydroxycoumarin was successfully achieved under the irradiation of our green-to-blue upconversion, indicating that low-powered up-conversion possesses potential application in the aspect of photocatalytic synthesis by solar energy.

Abstract:Abstract：Solid upconversion materials were prepared by using polydimethylsiloxane (PDMS) as polymer matrix to soak PdTPP (sensitizer) and DPA (emitter), the resulting solid upconversion system (PdTPP/DPA/PDMS) can prevent triplet-states of both sensitizer and emitter from quenching by oxygen, which can maintain stability for more than 10 h in the air. More importantly, PDMS can effectively enhance upconversion efficiency (UC) as high as 26.3%, which was the highest value in the reported literatures.

Abstract:Abstract:In this work, Extraction process of flavonoids from the drynaria rhizome by using microwave radiation produced by mechanical cavitation broken cell walls of plant cell and with response surface and Box-Benhnken design method was optimized qualitative and quantitative standards between yields of flavonoids and influence factors to confirm interactions between factors and best level combination. The antioxidant activty was estimated by the scavenging activitiy against hydroxyl radical with the oxidation of ferrous sulfate-salicylic acid-hydrogen for rhizoma drynariae flavonoids application and the development of functional products provide theoretical parameters and data index. The results showed that the best extractionof flavonoids was ration of liquid to materials 、microwave power micrwavere and microwave time（1:35 g/mL、400W、9min） and achieved the maximum yield of 10.12% (2.50 mg/ml). The above experimental results show that extraction yield was determined by the response surface and quadratic multinomial function model between influence factors, which provides a theoretical basis for the extraction of quantitative and rhizoma drynariae flavonoids has antioxidant activity in vitro which can be used in food and pharmaceutical industry for a natural preservative oxidation reagents by going deep into research and development.

Abstract:In this paper, 3-acetylaconitine and songorine were extracted and separated from the total alkaloids of Aconitum szechenyianum Gay., and their physiological activity on inhibition of human liver cancer cells were studied by MTT method to study the cytotoxic patterns of drugs, cell morphology experiment to observe cell morphology, flow cytometry to analysis cell apoptosis and cell cycle, and laser confocal microscopy to analysis cell apoptosis. The antitumor experiments of 3-acetylaconitine and songorine showed that the antitumor effects were gradually enhanced with the increase of the concentration. The number of cells was significantly reduced, and the growth of HepG2 was inhibited significantly after the drugs act on HepG2. In addition, the ratio of cells early apoptosis and late apoptosis increased, and the G1 phase cells gradually increased, but G2 and S phase cells gradually decreased with the prolonging of treatment time. The antitumor research of 3-acetylaconitine and songorine in vitro had confirmed their effects on inhibition tumor cell proliferation and induction liver cancer apoptosis, which showed that 3-acetylaconitine and songorine could become the new cell apoptosis inducers of liver cancer, and laied the foundation for new antitumor drug lead compounds.

Abstract:With the Zn2 coordination ，the luteolin-Zn(II) coordinate molecularly imprinted polymers(MIPs) were synthesized using luteolin as template, acrylamide(AM) as monomer，N，N?- methylene bis ester amide(MBA) as cross-linker and ethanol as solution. And then C-glycosyflavones from Indicalamus leaf in alcohol-water system were separated by solid phase extraction using MIPs. The results showed that when n(luteolin-Zn)﹕n(AM)﹕n(MBA)=1:5:30，the obtained MIP possessed the highest adsorption capacity of luteolin from methanol phase with a value of 103.4mg?g-1，that is 1.71 times of MIP without coordination，13.75 times of blank polymer. The MIP can revealed selective enrichment capability of C-glycosyflavones from Indicalamus leaf in alcohol-water system, the recovery rates of Orientin, Isoorientin, Vitexin and Isovitexin are 91.95%、80.87%、60.43% and 63.63%, the contents are 55.46、48.78、36.45 and 38.38 times of that in crude extract, the total content of the four kinds of C-glycosyflavones is from 0.70% to 32.68%.

Abstract:The Sn2 doped TiO2 photocatalyst with high specific surface area and high crystallinity was prepared by one-step hydrothermal route. The effects of different molar doping amount on hydrogen production performance were studied. The structure and spectral characteristics of the samples were characterized by XRD, UV-vis, SEM, EDX, XPS and Low temperature N2-adsorption and desorption. Xenon arc lamp was used as the light source to test the photocatalytic activity of different sample under full band and visible light. It turned out that the samples of the molar ratio of n(Ti):n(Sn)=20 had shown maximum photocatalytic activity of hydrogen production performance , the hydrogen production efficiency in the full band and visible light ware 50.3μmol?h-1?g-1 and 33.09μmol?h-1?g-1 respectively. And in multiple cycle test, hydrogen production efficiency had not significantly reduced, witch mean the sample has a stable nature.

Abstract:A series of novel DESs were synthesized by low temperature eutectic by imidazole and its derivatives and Bu4NBr.The dibenzothiophenes in the simulated oil were extracted. The experimental results show that when the molar ratio of Bu4NBr and imidazole was 0.6,the DES showed the best extraction effect on the dibenzothiophene, and the effect of the ratio of the oil volume and the temperature on the desulfurization effect was investigated. The selectivity and recycling performance of DESs were also investigated. The results showed that the desulfurization rate of DBT was 89.2% under the conditions of 1: 6, the extraction temperature T= 20 ℃，and the desulfurization rate can be up to 95% after 4 times extractions. Under the same conditions, the order of removal ability of different thiophene derivatives is：DBT> BT> 4,6-DMDBT＞T. DESs were regenerated and the desulfurization effect was good after regeneration. DESs still had higher desulfurization rate for DBT after 7 times of repeated extraction.

Abstract:Volatile flavor components in thermal reaction of ordinary pressure and pressure pork flavoring were extracted by solid-phase micro extraction，and identified by gas chromatography-mass and gas chromatography-olfactometry spectrometry. The results showed that, a total of 46 volatile compounds were identified in the ordinary pressure pork flavoring, including 5 hydrocarbons（6.58%）, 16 aldehydes（21.2%）, 10 alcohols（6.07%）, 9 esters and acids（4.98%）, 6 heterocyclic compounds and others（37.19%）. Total of 38 volatile compounds were identified in the pressure pork flavoring, including 3 hydrocarbons（1.49%）, 14 aldehydes（9.65%）, 6 alcohols（1.96%）, 5 esters, ketones and acids（2.09%）,10 heterocyclic compounds and others（47.73%）. The common identified substances are Copaene、Nonanal、Benzaldehyde、(E)-2-Nonenal、4-(1-methylethyl)-Benzaldehyde、(E,E)-2,4-Decadienal、1-Octen-3-ol、Terpinen-4-ol、4-methyl-5-Thiazoleethanol 、2-pentyl-Furan、Estragole、Anethole et al.

Abstract:In order to study the effect of adding salt on the taste active compounds of chicken soup, the nucleotides, organic acids, free amino acids and TAV values of taste substances were tested by HPLC,EUC values and sensory evaluation were used to evaluate the taste of chicken soup. The results showed that the concentration of CMP, GMP, lactic acid, succinic acid, histidine ,glutamic acid and the total concentration of free amino acids in the pre-cooked add salt chicken soup were all higher than the other two kinds.The TAV of lactic acid and succinic acid were over 1, which influenced the taste of the chicken soup directly. The concentration of aspartic acid in three samples did not have a significantly change. As shown in the sensory evaluation, the score of the pre-cooked add salt chicken soup was highest.

Abstract:Twenty two 2-(4-aryloxyphenoxy)propionic acid derivatives were designed and synthesized from (R)-2-(4-hydroxyphenoxy) propanoic acid, and their structures were characterized by 1HNMR, 13CNMR, HRMS or elemental analysis. The bioassay results indicated that most of the compounds exhibited excellent activities and selectivities against monocotyledonous weeds at 75 g/hm2. In particular, compounds Ⅳa, Ⅳc, Ⅳf, Ⅳg and Ⅳi exhibited 100% herbicidal efficiency in both pre- and postemergence treatments against Digitaria sanguinalis, Echinochloa crus-galli L and Setaria viridis.

Abstract:The carboxymethyl salix psammophila powder(CMS) as carrier, the carboxymethyl salix psammophila powder supported nanoscale zero-valent iron(NZVI/CMS) was prepared by using liquid phase reduction method. The micro structures of nanoscale zero- valent iron(NZVI) and NZVI/CMS were characterized by means of SEM, FTIR, XRD and TEM. The effects of the adsorbent dosage, initial concentration of Pb2 , adsorption time, adsorption temperature and pH on adsorption properties of NZVI and NZVI/CMS for Pb2 were studied. The characterization results show that NZVI was loaded on the CMS successfully, and the NZVI were scattered obviously on CMS, reunion phenomenon had been resolved effectively, CMS played a role in dispersing NZVI particles.The adsorption results showed that the adsorption capacities of NZVI and NZVI/CMS reached a maximum of 390.30 mg?g-1 and 535.50 mg?g-1 as the dosage was 0.05 g and 0.01 g respectively, the initial concentration of Pb2 was 600 mg?L-1 and 400 mg?L-1, the adsorption time was 120min, the adsorption temperature was 30℃ and the pH of Pb2 solution was 4.5 and 4.0 respectively.

Abstract:Fluorine-containing polyacrylate composite emulsion modified by active nano TiO2 was prepared with -methyl methacrylate alkoxy silane (KH570), nano - TiO2 modified by KH570, perfluorinated octyl ethyl acrylate (FM) as the main raw material, and copolymerized with propenyl monomers. The structure and performance of copolymer were studied by means of infrared spectroscopy (FT-IR), atomic force microscope (AFM) and contact angle measuring instrument. The results showed that the modified nano-TiO2 and fluorinated monomers were successfully introduced into polyacrylate copolymer. The granules were spherical, smooth and monodisperse with an average of 184nm. Compared with acrylate polymer, the roughness of modified film was improved, which was advantageous to the waterproof and oilproof. The addition of fluorine and silicon monomer largely increased the contact angle, and the contact angle of water and diiodomethane was 125° and 110° respectively. At last, the composite emulsion was used as a paper surface sizing agent, the water contact angle was 147°, the diiodomethane contact angle was 133°, the paper’s waterproof and oil repellency were significantly increased with the introduction of fluorine monomer.

Abstract:Aimed at the problems of strength’s slow development, slow setting and even super retarding happening at the top of cement slurry in deep and ultra-deep wells with long cementing intervals,a new type of polymer/inorganic composite retarder(PMC-180)was prepared by in-situ intercalated polymerization method.2-acrylamido-2-methylpropanesulfonic acid(AMPS),acrylic acid(AA),two diallyl dimethyl ammonium chloride(DMDAAC)were used as monomer,Modified montmorillonite was used as active polymerization filler,the structures and the thermal stability of PMC-180 were characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD) and thermogravimetric analysis(TGA).Then, the application performance was evaluated and the retarding mechanism in cement slurry was discussed.The results show that the synthesized copolymer (PMC-180) is the target product with intercalation/exfoliation composite structure,The initial pyrolysis temperature of which reaches 267.27℃ and has good thermal stability.The cement slurry containing PMC-180 has good retarding property and salt/temperature resistance performance,the thickening time of the freshwater or brine cement slurry can be regulated effectively by adjusting the additives amount of PMC-180,moreover, the thickening curve of different kinds of cement paste is stable and no abnormal phenomenon such as bulging. The compressive strength of slurry containing PMC-180 is well developed at low temperature,which can be applied to long sealing and large temperature difference cementing and effectively alleviates super retarding phenomenon at the top of cement slurry.The slurry with PMC-180 which is easy to regulate and control has good compatibility with different cement slurry system and additives,and has good comprehensive performance.the retarding mechanismand temperature adaptation mechanismof PMC-180 were discussed by characterization methods of chemical analysis, X ray diffraction and scanning electron microscope:(1)PMC-180 is adsorbed on the surface of cement particles to formed a layer of hydration adsorption and the complexation reaction between PMC-180 and Ca2 is inhibiting the normal growth of Ca(OH)2 crystal nucleus or crystal, so the retarding effect is achieved finally;(2)the binding or release of effective retarding groups were controlled by the change of lamellar spacing being related to temperature in PMC-180,at the same time, the anions and cations in the molecular structure compete to adsorb each other on the surface of cement particles,therefore,The PMC-180 has good adaptability to large temperature difference,which mainly shows that it has a strong retarding effect at high temperature, and has a partial retarding effect at low temperature.