Abstract:Mustard gas is known as the "king of chemical warfare agents" and is a typical class of erosive chemical warfare agents. Catalytic degradation has the characteristics of high efficiency and good safety. It can not only degrade mustard gas but also prevent to degrade into other highly toxic products, such as toxic sulfone products. The materials used for catalytic degradation mainly include hypochlorite, hydrogen peroxide, enzymes, and metal-based catalysts. Among them, the metal-based catalyst has mildness, high efficiency and high selectivity, and the mustard gas is degraded into non-toxic products mainly through oxidation reaction, hydrolysis reaction and dehalogenation elimination reaction. This paper summarizes of the metal-based catalysts such as metal oxides, polyoxometalates (POMs), metal organic framework materials (MOFs) for the degradation of mustard gas and the principle of degrading mustard gas. The production method of metal-based catalyst material for degrading mustard gas was summarized. Finally, The research directions in metal oxides, POMs and MOFs are prospected so as to provide new ideas for subsequent research.

Abstract:Phosgene poses a great threat to public security and human health due to its lethal toxicity. Fluorescent probes have become powerful tools in the detection of phosgene owing to their good selectivity, high sensitivity, real-time monitoring, low cost and simple operation. Firstly, the research progress of small organic fluorescent probes for the recognition of phosgene in recent years is reviewed. Then, the design idea and recognition mechanism of different kinds of probes are summarized according to the recognition groups of fluorescent molecules. Finally, the future development of fluorescent probes for the detection of phosgene and their potential challenges are prospected.

Abstract:Boron nitride-based materials have long been widely used in thermal conductivity, aerospace, chemical engineering, etc. Due to the physical and chemical stability and good pore size characteristics, boron nitride-based materials have great application potential in the field of water pollution removal. Based on the research progress on the preparation and modification of boron nitride-based materials at home and abroad, this review summarizes the various methods of preparing boron nitride-based materials, compares the advantages and disadvantages of each method and the research status. Secondly, this article introduces the modification methods of boron nitride-based materials and the removal effect and removal mechanism of water pollutants, and further analyzes various factors that affect the adsorption performance of boron nitride-based materials. Finally, the application status of boron nitride-based materials is summarized and its development is prospected.

Abstract:Silicon-based anode material has become a hot topic in the field of new energy lithium-ion battery anode material because of its theoretical ratio of 4200mAh/g. However, due to the volume expansion rate of silicon-based material stoking rate of up to 400%, after multiple charge and discharge cycle, the silicon particles will rupture and powder it on the electrode substrate easily shed, resulting in the rapid decay of battery capacity, short life of the technical defects. In order to alleviate the stress caused by the huge volume change of silicon particles and maintain electrode integrity, scientific researchers at home and abroad from the composition of the battery, the active materials, conductive agents, binders, electrolytes and other systematic research, in which the polymer binder modification is a high life, anti-attenuation of one of the more effective means. Based on the excellent properties of lithium-ion silicon-based anode materials and the research status of lithium-ion battery anode bonding materials, the molecular chain design of silicon-based anode composition, structure, performance, action principle, molecular-to-molecular mechanism and anegative adhesive is reviewed, the influence law on the electrochemical properties of silicon-based lithium-ion battery is discussed, and theoretical and practical guidance is provided for the application and development of lithium-ion battery silicon-based negative-adhesive materials.

Abstract:As a bio-based surfactant, sucrose ester has been widely used in food, medicine and cosmetics fields. At present, the synthesis of sucrose esters is mainly conducted by esterification, acyl chloride esterification and transesterification. And, the transesterification method is the most widely used method. However, the poor compatibility between sucrose and methyl esters leads to many side reactions, such as sucrose coking and agglomeration, methyl ester hydrolysis and saponification, which significantly affected the reaction efficiency and the product quality. In this work, the synthesis method of sucrose esters such as solvent method, microemulsion method and solvent-free method was introduced. Subsequently, this work introduced application of new catalytic technologies, such as phase transfer catalysts, solid base catalysts and ionic liquids. Physical interface strengthening technologies in the synthesis of sucrose esters was summarized. In the synthesis of sucrose esters, the design of solid base catalyst and application of multi-process coupling and strengthening technology and mechanism was prospected. Therefore, it can provide a technical support for future synthesis of sucrose ester surfactants.

Abstract:5-Ethoxymethylfurfural (5-EMF) is considered as a new generation of biomass liquid fuel and fine chemical with important potential. The recent research progress on the synthesis of 5-EMF from biomass resources and its derivatives is summarized. The reaction pathways and mechanism of synthesizing 5-EMF from biomass materials such as cellulose are described. The characteristics, preparation methods and catalytic behavior of heterogeneous acid catalytic systems are introduced and the latest catalytic technology for the synthesis of 5-EMF is emphasized. On this basis, the future development direction is to directly convert biomass into 5-EMF in one step.

Abstract:Organic/inorganic hybrid materials are the one of most dynamic research areas in materials science currently. Polyhedral oligomeric silsesquioxane (POSS) achieves the combination of organic and inorganic components at the molecular level. The structure is a three-dimensional cage type supported by the Si-O-Si bond. It has excellent reactivity, thermostability, flame resistance, porosity and nano-size effects. It could be applied in many fields after being modified. In this paper, the modification methods of POSS were described from three aspects of graft modification, polymerization modification and coordination modification. Then the application research progress of POSS in heat-resistant materials, flame-retardant materials, reinforcement materials and porous materials was reviewed. Finally, the research direction of POSS was suggested. It should be conducted on the structure-effect relationship, modification method and safety of POSS deeply and systematically to promote the application of POSS materials.

Abstract:Cellulose textiles are flammable, and their application increases the possibility of fires, which poses a serious threat to people's lives. Flame retardant modification of cellulose textiles is an effective measure to improve its flame retardant performance. This article reviewed the different modification methods of cellulose textiles, and analyzed the research status of the flame retardant modification of cellulose textiles such as impregnation and coating finishing methods, graft modification and blending modification methods. At the same time, the factors restricting the development and application of flame retardant cellulose textiles were summarized, such as unstable system during preparation, poor flame retardant durability of products and the damage to mechanical properties. Finally, the development direction of flame retardant cellulose textiles was prospected. It was pointed out that the rational use of biomass raw materials, designing intelligent, multifunctional and flame retardant durable textiles is the future development direction of cellulose textiles.

Abstract:Intelligent drilling fluid is a new research direction in the oil drilling industry. Compared with the problems of insufficient directivity, weak adaptive ability, difficult monitoring and overly cumbersome manual operation of traditional drilling fluids, intelligent drilling fluids have better targeted, drilling fluid The performance is more prominent, and at the same time, the degree of manual intervention can be greatly reduced. Therefore, the research on the intelligentization of drilling fluid is of great significance. This article reviews the synthesis and development of intelligent drilling fluid chemical system, the enhancement of the function of drilling fluid intelligent auxiliary system, the development and application, and the current status of the main research. Other research directions have been developed, but in terms of intelligent chemical systems, precise control of drilling fluid performance parameters has not yet been achieved. The intelligent direction in the development of intelligent drilling fluids and the construction of intelligent drilling fluid platforms is too single to meet the needs of current drilling sites. It is suggested that the intelligentization of drilling fluid in the future should develop in a comprehensive and diversified direction.

Abstract:As an important way of energy supply, thermal energy is closely related to human’s daily life and social production. In order to improve the efficiency of the thermal energy utilization, the development of phase change energy storage materials has attracted much attention. Among them, polyurethane phase change materials solve the problems of poor formability, easy flow after phase change and extra packaging of tradition PCMs. At the same time, it has the advantages of large energy storage density, easy adjustment of phase change temperature, good processability, high mechanical strength and corrosion resistance and so on. so it has a broad application prospect. This paper classifies polyurethane PCMs according to their structural characteristics, summarized and analyzes the synthesis routes and phase change thermal storage properties, and summarized the application process of polyurethane PCMs in construction industry, intelligent textile and road traffic and other aspects, and prospects the future research work.

Abstract:As an important derivative of graphene, graphene oxide not only has the advantages of abundant source, simple preparation procedure, and low cost, but also has excellent mechanical properties, wear resistance and adsorption properties. In addition, the reduction product of graphene oxide shows excellent electrical and thermal conductivity. Therefore, graphene oxide is an ideal filler for polymer-based nanocomposites. In recent years, with the continuous innovation of the preparation methods of composite materials, polymer-based graphene oxide nanocomposites have developed rapidly, and have achieved large-scale applications in the fields of energy storage, flame retardant and so on, which has an important leading role in the further development and application of polymer-based graphene oxide nanocomposites. This paper systematically introduces the modification methods of graphene oxide, reviews the research progress of polymer-based graphene oxide nanocomposites, and prospects the development prospects of polymer-based graphene oxide nanocomposites.

Abstract:Potassium doped graphitic carbon nitride (g-C3N4) sludge-based composite photocatalyst adsorbent (AC/K-CN) was prepared by calcination method using flocculation sludge of water-based ink wastewater, melamine and potassium carbonate as raw materials. The crystal structure, morphology and photoelectric properties of the composite were characterized by X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance (UV-vis DRS), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), specific surface area (BET), scanning electron microscope (SEM) and fluorescence (PL) spectroscopy. Meanwhile, the composite was applied to remove Cationic Blue X-GRRL from aqueous solutions by photocatalyst under visible-light irradiation. The results show that the photocatalytic activity of the AC/K-CN composite catalyst on cationic blue X-GRRL is significantly higher than that of pure g-C3N4 or AC, which is attributed to the effective electron-hole separation of the composite material. Compared with pure g-C3N4 and AC, the AC/K-CN composite catalyst increased the decolorization rate of cationic blue X-GRRL with a mass concentration of 20 mg/L by 43.17% and 46.76% under simulated sunlight.

Abstract:Poly(N-isopropylacrylamide) copolymers with side chain of pyrenyl group were synthesized by radical solution copolymerization of N-isopropylacrylamide (NIPAM) and β-pyrenebutanoyloxyethyl methacrylate (PyBEMA). The structure of the copolymers was characterized by IR, UV and 1H NMR spectra. The effects of different feed ratios on the yield, composition, relative molecular weight and distribution of copolymers were investigated. The results of the copolymers aqueous solutions show that the as-synthesized copolymers are a kind of thermosensitive polymers with lower critical solution temperature (LCST), and its LCST decreases with the increase of the pyrenyl content in the copolymers. Addition of α-cyclodextrins (α-CD) will cause a slight increase in LCST of copolymers, while addition of β-CD and γ-CD will cause a decrease in LCST, and γ-CD will cause a more significant decrease in LCST. The fluorescence properties of copolymer aqueous solutions show that the copolymers have slight hydrophobic aggregation in water because it exists of pyrenyl excimer fluorescence. At room temperature, the addition of β-CD can reduce the hydrophobic aggregation of pyrene groups in the copolymer side chains. With the increase of temperature, the fluorescence intensity (IM) of pyrenyl monomer first decreased, then suddenly increased, then reached a stable and slightly decreased. However, the fluorescence intensity (IE) of pyrenyl excimer first increased slightly, then remained basically unchanged, and then decreased slowly. The ratio of I1/I3 decreased with the increase of temperature, and decreased suddenly in the temperature range when the polymer phase transition occurred.

Abstract:In this paper, a multi-branched colorimetric rhodamine triformylphloroglucinol hydrazone probe RbTP was prepared by condensation reaction between rhodamine hydrazide and 2,4,6-Triformylphloroglucinol. In aqueous acetone solution, the probe can quickly recognize Cu2+ with good sensitivity and anti-interference ability, whereas other ions including Ag+ , Al3+, Fe2+, Fe3+, Zn2+, Pb2+, Ni2+, Cd2+, Co2+ and Hg2+ showed no such spectral change. There was a good linear relationship between the maximum absorption intensity and the volume of Cu2+ (0~36 μL). The limit of detection (LOD) for Cu2+ was estimated to be to 1.33?10-6 mol/L. After 5 times periodically alternating addition of Cu2+ and EDTA, the probe could still detect Cu2+ reversibly. The cyclic experiment and Job's Plot test confirmed that the reaction between RbTP and Cu2+ was through the complexation process and the stoichiometric ratio was 1:3.

Abstract:Nano-selenium is biosynthesized using lemon extract as a raw material. The formation process of nano-selenium is tracked by UV-Vis technology, the chemical composition and structure of the synthesized nano-selenium are characterized by XRD, the surface morphology is observed by SEM, and the nano-particle size is determined by a particle size analyzer. FTIR was used to analyze the chemical interaction between the nano-selenium surface and biomolecules. The scavenging abilities of the prepared nano-seleniumon on superoxide anion free radicals, hydroxyl free radicals and DPPH free radicals were examined. It was found that at pH = 10, the lemon extract can reduce 50 mmol / L selenite to produce amorphous selenium nanoparticles. The particle size of the synthesized nano-selenium is between 78.8~122.4 nm at 1 h. At 2 h, the particle size of nano-selenium is between 164.2~295.3 nm, which is spherical and has good dispersion; the lemon water extract is used both as a reducing agent and as a stabilizer for synthesizing nano-selenium. The essential reason is the chemical action between the biomolecule and the nano-selenium surface. Nano-selenium shows antioxidant activity positively correlated with concentration. Comparative studies show that the antioxidant strength is in order of vitamin C> small-sized nano-selenium> large-sized nano-selenium.

Abstract:In order to enhance the transparency and impact properties of iPP, the physical blending method was used to modify the iPP with the combination of elastomer SEBS and NX8000K nucleating agent. Differential scanning calorimetry (DSC), X-ray diffraction analysis (XRD), and polarization microscope analysis (POM) were used to study the effects of SEBS on the crystallization behavior, transparency, and mechanical properties of iPP/NX8000K complexes. The results showed that when the NX8000K content is 0.6 %( mass fraction, same as below) and the amount of SEBS is 40 %, the haze of the iPP/NX8000K/SEBS ternary composition reduced to 24.9%, which is 54.7% lower than that of pure iPP; the impact strength is increased to 50.7 kJ/m2, which is 10 times higher than that of pure iPP.

Abstract:In this paper, the supported phase transfer catalytic polyester fabric was prepared by dip-rolling with acrylate copolymer as modifier and polyester fabric as carrier. The catalytic performance and reaction mechanism for Williamson ether synthesis reaction with the catalytic fabric were analyzed. The effects of cross-linking of copolymers, length of hydrophobic alkyl chain, cationic structure, cationic content and loading amount of the modifier on the catalytic activity for the modified fabric were investigated. The results show that phosphoric acid and glycerin can improve the crosslinking degree of copolymer molecules, thus improving the catalytic stability of the catalytic fabric; the excellent catalytic activity of the modified fabric is observed when the length of hydrophobic chain ester is octadecyl ester, the cationic monomer is methylacrylamide propyldimethylbutylammonium bromide, the molar amount of the cationic monomer is 13.33% and the loading amount is 20%. The oil phase was adsorbed on the surface of the catalytic fabric, and the ion-exchange and bonding reactions were initiated. In Williamson ethers synthesis reaction with different phenols, the conversion rate can reach more than 92%. The catalytic activity has no obvious change after reused 10 times.

Abstract:Sn-MCM-22 catalysts were synthesized using a post-synthetic method of MCM-22 zeolite with SnCl4 for converting 1,3-dihydroxyacetone (DHA) and alcohol to alkyl lactates. The characterization results of XRD, SEM, N2 adsorption-desorption, UV-Vis, Py-IR demonstrated that Sn was incorporated into the tetrahedral framework and uniformly grafted as SnO2 nanoparticles on Sn-MCM-22. Sn-MCM-22 possessed Lewis and Brønsted acid sites, and effectively catalyzed DHA to prepare alkyl lactates. The yield of methyl lactate reached 96.3 %, under the conditions: DHA methanol solution (0.25 mol/L), the reaction temperature was 120 oC, and the reaction time was 15 h. In addition, the high yields of alkyl lactates, up from 86.4% to 88.4%, were produced from ethanol, n-propanol, and n-butanol, respectively. The catalyst displays good cycling and stability performance.

Abstract:A new semi-synthesis method for flavonoid glycosides diosmin was performed. And the antiproliferative activity of the diosmin sample against six common cancer cells was determined. Diosmin was prepared from available and inexpensive hesperidin using DDQ as the dehydrogenating agent. After purified through the Sephadex LH-20 column, diosmin was identified by HPLC-MS and 1H-NMR. It was confirmed that the transformation method is feasible for the synthesis of flavonoid glycosides. The final synthesis process is: raw material ratio 1:0.4, reaction temperature 110℃ (oil bath temperature), and reaction time 6 hours. The results of this study will provide a new idea for the synthesis and application of diosmin.

Abstract:A series of nopinone thiazolidazone drivatives were obtained from nopinone by aldol condensation, acylhydration and cyclization, therein nopinone was obtained from -piene by xidation reactions. All the target compounds were structurally characterized by 1H NMR, 13C NMR and HR-MS, and the antibacterial activitesof these compounds against Staphylococcus aureus, Candida albicans and Klebsiella pneumoniawereinvestigated. The results showed that 2-{2-{6,6-dimethyl-3-(4-nitrobenzylidene)bicyclo[3.1.1]heptan-2-ylidene}hydrazinyl}-4-(4-fluorophenyl)thiazole (Ⅲe), 4-{2-{2-{6,6-dimethyl-3-(-4-nitrobenzylidene)bicyclo[3.1.1]heptan-2-ylidene}hydrazinyl}thiazol-4-yl}phenol (Ⅲf), 2-{2-{3-(4-fluorobenzylidene)-6,6-dimethylbicyclo[3.1.1]heptan-2-ylidene}hydrazinyl}-4-phenylthiazole (Ⅲg), 2-{2-{6,6-dimethyl-3-(4-methylbenzylidene)bicyclo[3.1.1]heptan-2-ylidene}hydrazinyl}-4-phenylthiazole (Ⅲj) had significant inhibitory effect on staphylococcus aureus, and the minimum inhibitory mass concentration was 3.51 μg/L, 0.88 μg/L, 7.03 μg/L and 3.52 μg/L, respectively; 4-{2-{2-(3-benzylidene-6,6-dimethylbicyclo[3.1.1]heptan-2-ylidene)hydrazinyl}thiazol-4-yl}phenol (Ⅲc) had good inhibitory activity on Candida albicans, and the minimum inhibitory mass concentration was 28.12 μg/L. However, all the target compounds had no significant inhibitory effect on Klebsiella pneumoniae. It was indicated that the difference of the substituent groups R1 and R2 leaded different inhibiting activities of the target compound to Staphylococcus aureus from the structure-activity relationship. When R1 is a strong electron-withdrawing group, the antibacterial activity of the compound significantly improved, especially, the inhibitory effect of compound Ⅲf to Staphylococcus aureus is comparable to that of kanamycin sulfate, which has potential development value.

Abstract:Hydroxyl ferrocene is an important intermediate for the synthesis of ferrocene derivatives. There are several methods for the synthesis of 1-ferrocenylethanol whereas the synthesis of 2-ferrocenylethanol is rarely reported. In this work, the target compound 2-ferrocenylethanol was synthesized through a three-step reaction: first, acetyl ferrocene was prepared from ferrocene and acetic anhydride by Friedel-Grafts acylation reaction, then ferrocenylacetic acid was synthesized by Willgerodt-Kindler reaction, followed 2-ferrocene ethanol was obtained by reduction reaction. The effects of different reaction conditions on the yield of 2-ferrocenylethanol from ferrocenylacetic acid were studied. The optimum reduction conditions were determined as follows: the reducing agent was lithium aluminum hydride; n (lithium aluminum hydride): n (ferrocenylacetic acid) was 8 : 1; the solvent was tetrahydrofuran; the reaction temperature was 25C; the reaction time was 24 h, and the yield of 2-ferrocenylethanol was 82 %. Subsequently, anti-tumor activities of 2-ferrocenylethanol were evaluated against human breast cancer MCF-7 and MDA-MB-231, human liver cancer HepG2, human cervical cancer HeLa cell lines in vitro. The preliminary activity test results showed that 2-ferrocenylethanol showed obvious inhibitory activities, against MCF-7, MDA-MB-231, HepG2 and HeLa, and its half inhibitory concentration (IC50) value was 17.4, 12.9, 20.7, 24.6 μmol/L, respectively. Additionally, 2-ferrocenylethanol was nontoxic to normal MCF-10A cells, while the positive control drug 5- FU exhibited essential toxicity.

Abstract:In this paper, natural polysaccharides sodium alginate (SAL) and chitosan (CS) are used as basic raw materials, and CaCl2 is used as a cross-linking agent. The sodium alginate solution is dropped into the chitosan-calcium dispersion solution. While physical crosslinking occurs between the sodium alginate and the chitosan molecular chain, it is also simultaneously crosslinked with calcium ions, the millimeter-grade chitosan-calcium-sodium alginate (CS-Ca2+-SAL) hydrogel with a sphere plastic form was prepared by one-step method. The hollow Gel spheres with smooth surface, uniform shape and shell were successfully prepared by adjusting the amount of raw materials, the speed of the centrifuge, the diameter of the needle and the crosslinking method. Using fluorescent carbon nanodots as label, the swelling properties and slow-release properties of Gel spheres were investigated. The results show that the swelling performance of the hydrogel spheres is significantly affected by pH. The swelling rate is the smallest when the solution is at pH = 1.2, and the swelling rate is the largest when it is at pH = 6.8. The experimental results of release rate of fluorescent carbon nanodots in pH=7.1 Tris-HCl buffer solution indicate that the release mechanism is fitted to Hixcon-Crowell models and it conclude that the Gel sphere has the dissolution sustained release process, accompany with diffusion of nano-drugs.

Abstract:The ionic liquid 1-methyl-3-(3-sulfopropyl)imidazolium chloride ([MIMPs]Cl) as a catalyst demonstrates high efficiency in the one-pot aerobic oxidative condensation of arylmethylamines with 1,2-phenylenediamines to give benzimidazoles. The products were characterized by 1H NMR. First, the condensation of benzylamine with o-phenylenediamine to give 2-phenylbenzimidazole was used as a model reaction to screen the catalysts and optimize the reaction conditions, which were found to be [MIMPs]Cl with 25 mol% of basic substrate as catalyst, oxygen of 0.1 MPa as oxidant, dimethylformamide (DMF) as solvent, benzylamine to o-phenylenediamine molar ratio of 2.5:1, reaction temperature of 100 ℃, and reaction time of 20 h. Under the optimal conditions, the yield of 2-phenylbenzimidazole reached 92%. Then, the method was applied to other substituted substrates and good to excellent results were obtained, indicating its broad substrate tolerance. This strategy is benign to the environment and suitable for the synthesis of pharmaceutical intermediates due to its advantage of using molecular oxygen as the oxidant under metal-free conditions.

Abstract:Yttria-stabilized zirconia (YSZ) hollow fiber membrane was prepared by a combined phase inversion/sintering method. The effects of YSZ content and sintering temperature on the microstructure and properties of the prepared hollow fiber membrane were investigated. The results show an asymmetric structure of YSZ hollow fiber membrane containing finger-like structure and sponge-like structure. The YSZ content impacted the ratio between finger-like structure and sponge-like structure, and sintering process caused a densification of microstructure. Under the conditions of m(YSZ):m(PSF):m(NMP)=5.0:1:4, sintering temperature of 1200 ℃, the pure water flux was 2.33 m3/(m2·h·MPa) and the bending strength was 134.5 MPa.

Abstract:Polyaspartic Acid/3-Amino-4-hydroxybenzenesulfonic acid Graft Copolymer (denoted as PASP/3A4HBSA) was synthesized via the reaction of 3-Amino-4-hydroxybenzenesulfonic(3A4HBSA) and polysuccinimide (PSI). The obtained graft copolymer (PASP/3A4HBSA) was characterized by FTIR and 1HNMR. The static scale inhibition method was used to evaluate the scale inhibition behavior of PASP/3A4HBSA and PASP against calcium carbonate. The experimental results showed that: Under the condition of single variable experiment, PASP/3A4HBSA possessed the best scale inhibition property against CaCO3. Inhibition efficiency of PASP/3A4HBSA reached 92.7%, but that of PASP was only 77.1% when the dosage was 100 mg/L in the experiment at 70℃, 24h, pH=7. The scale surface structure and phase structure before and after treatment were characterized by SEM and XRD,Further analysis of the scale inhibition mechanism of the scale inhibitor against CaCO3 was analyzed by FTIR. And it was found that the scale inhibition was mainly caused by lattice distortion of CaCO3, complexation of the scale inhibitor and Ca2+．

Abstract:The CdS/ZnO-ZnFe2O4 composites (CdS/Zn-Fe LDO) were prepared by high-temperature roasting with complex using the method of precipitation CdS and zinc iron layered double hydroxides (Zn-Fe LDH).The structure, morphology and optical properties of the composite were characterized by XRD, SEM, UV-Vis DRS and PL. The photodegradation of malachite green by CdS/Zn-Fe LDO was studied under visible light. The experimental results showed that the photocatalytic degradation capacity of CdS/Zn-Fe LDO composites were higher than CdS or Zn-Fe LDO. The photocatalytic activity of m(CdS) : m(Zn-Fe LDH)=1 : 1 (CdS/Zn-Fe LDO（1:1）) was the biggest among composites. The degradation rate of malachite green was 96.6% under the optimal conditions of 20 min, initial concentration 20 mg/L, CdS/Zn-Fe LDO (1:1) dosage of 20 mg as well as visible light. Furthermore, the composites also degraded other dyes such as, rhodamine b, methylene blue, methyl orange and crystal violet. The kinetics of photodegradation reactions were followed with pseudo first order kinetic.

Abstract:A closed water-dispersible isocyanate modified acrylate copolymer was gradually synthesized by solution polymerization. The polymer is based on amphiphilic properties acrylate long chain, which was synthesized from methoxypolyethylene glycol acrylate (MPEG350A), butyl acrylate (BA), hydroxypropyl acrylate (HPA). Subsequently, condensed with isophorone diisocyanate (IPDI) and finally blocked with methyl ethyl ketoxime (MEKO). Then, a composite sizing agent (PMP) was prepared with 1% wt PAIM and 4% wt polyvinyl alcohol (PVA), which was used for sizing kapok mixed paper. The structure of PAIM was characterized by FTIR and GPC, the effects of the ratio of hydrophilic and hydrophobic monomers and the amount of HPA monomer on the particle size and stability of PAIM dispersion were discussed using DLS and TSI. The effects of isocyanate content on the physical properties of paper were studied, and the application performance was compared with the commercial sizing agent. The results showed that when n(MPEG350A):n(BA)=2:1, w(HPA)=10.1%, w(—NCO)=17.3%, the sizing concentration was 10 %, the paper had a folding endurance of 569 time, a tensile index of 66.83 N·m/g, a tear index of 11.54 mN·m2/g, a stiffness of 92.16 mN, and a contact angle of 80.3°. Compared with the commercially available sizing agent, PMP-3 had a longer storage period. After PMP-3 sizing, paper folding resistance, tensile strength, tearing degree and stiffness were increased by 29.3% ，32.3% , 22.1% ，19.5%, PMP had excellent business application prospects.

Abstract:Hydroxypropyl guar was hydrophobically modified by1-bromotetradecane. The modified product was characterized by FTIR and thermogravimetric analysis. Then, a composite fracturing fluid composed of mass fraction of 0.15%modified hydroxypropyl guar and mass fraction of 0.8% Gemini surfactant, 1,3-N-bis(3-dodecylpropanamide)-1,1,3, 3-N-tetramethyl isopropanol-1,3-ammonium dibromide was prepared. The heat and shear resistance, rheological property, dynamic proppant transport capacity, interfacial property, and formation damage of the composite fracturing fluid were investigated. The results showed that the hydrophobic carbon chains were connected to hydroxypropyl guar successfully. The composite fracturing fluid exhibited good thermal stability with a viscosity of over 109 mPa·s at 90 ℃ and typical viscoelasticity and favorable dynamic proppant transport. The oil/water interfacial tension of the broken fracturing fluid was 0.9 mN/m, which could significantly enhance the hydrophilicity of reservoir rocks. The loss rates of matrix permeability for the oil phase and crack conductivity were only 9.1% and 5.3% respectively.

Abstract:A matrix alkyd resin was synthesized using oleic acid, pentaerythritol, phthalic anhydride, and benzoic acid as raw materials and propylene glycol methyl ether acetate (PMA) as a solvent; benzoyl peroxide ana tert-butyl peroxybenzoate double initiators were used to initiate the copolymerization of olefin monomers in steps to prepared. A styrene-acrylic resin was modified and a water-based alkyd resin was prepared. The effects of different oil degrees on the structure and properties of water-based alkyd resins were studied. The structure, stability and emulsion properties of the resin were characterized by Fourier transform infrared spectroscopy (FTIR), thermal weight loss (TGA), and laser particle size scattering (DLS). The film properties of the resin were measured, including water resistance, surface drying time, hardness, salt spray resistance, and electrochemical properties. The results show that when the molar ratio of oleic acid: pentaerythritol: terephthalic anhydride: benzoic acid is 1: 1: 1: 0.3 mol and the oil degree is 47%, the particle size of the polymer emulsion is 74.4 nm, and the PDI is 0.262. The water absorption of the film is 14.5%, the contact angle is 70.87 ?, and has good water resistance. The surface drying time of the modified alkyd resin is shortened to 0.5 h. The dry time of the modified alkyd resin is shortened to 24 h, and the hardness reaches HB.

Abstract:An alkaline protease was used to catalyze the hydrolysis of gelatin to prepare base solution of the foaming agent, and it was compounded with sodium dodecylbenzenesulfonate and fatty alcohol polyoxyethylene ether sodium sulfate to prepare a variety of new protein-based foaming agents. These foaming agents were preselected based on the foam indexes, and then air-foam treated lightweight soil samples were prepared using these foaming agents. Then the densities of these samples were measured. According to foam indexes and sample densities, the best foaming agents are the homemade foaming agent F-6 (10% gelatin, 11.4% sodium dodecylbenzenesulfonate, 12.6% fatty alcohol polyoxyethylene ether sodium sulfate ) and F-7 (10% gelatin, 7.8% sodium dodecylbenzenesulfonate, 15.4% fatty alcohol polyoxyethylene ether sodium sulfate). The 1 hour defoaming ratio of these two foaming agents is 52.52% and 53.18%, respectively, and the foaming multiples are 82.61 and 81.66, respectively. The comprehensive performance of these two foaming agents is better than that of general commercially available foaming agents, and the densities of the samples were relatively small.The compressive strength can reach 4MPa, fully meeting the engineering requirements.