Abstract:A series of cobalt ferrite materials (CoFe2O4-X) were successfully synthesized by a simple co-precipitation method at different calcination temperatures, and their structure and composition of the catalyst were analyzed by SEM, XRD, BET, XPS and other characterization methods. The obtained materials were used for activation Peroxymonosulfate (PMS) to degrade sulfamethoxazole (SMX). The effects of catalyst dosage, PMS dosage, pH value and inorganic ions on the degradation of SMX were investigated. The results showed that the CoFe2O4-550 obtained at 550℃ calcination temperature exhibited the best catalytic performance. Under the optimal reaction conditions, the degradation rate of SMX can reached to 95% within 20 min and the TOC removal rate was 80%. At the same time, the CoFe2O4-550/PMS reaction system exhibited excellent catalytic performance at a wide pH range (pH=5.00-9.00). The CoFe2O4-550 catalyst can be recovered by magnets, showing good stability and reusability. Free radical quenching experiments showed that a large amount of SO4-? and ?OH radicals were produced during the degradation reaction, and the corresponding catalytic degradation mechanism was proposed. This work will provide a new approach for the effective treatment of wastewater containing SMX compounds.

Abstract:Graphene oxide/fluorine-silicon acrylate (GO/FSiAc) composite emulsion finishing agent was prepared by using graphene oxide (GO) as functional filler and fluorine-silicon acrylate (FSiAc) emulsion as functional adhesive aids. And then, it was applied in the water-repellency and anti-UV multifunctionally finishing of flax fabric by roll-dry-bake process. The structure and particle size distribution of GO/FSiAc composite emulsion were characterized by FTIR, TEM and DLS; the surface elements and morphology of the finished flax fabrics were characterized by XPS and SEM; the effects of the mass ratios of soft monomer (BA) and hard monomer (MMA) and mass concentration of GO on the application properties and wearability of the finished flax fabrics were investigated, such as the heat resistance, water repellency, UV protection and physical and mechanical properties. The results showed that GO disperses well in FSiAc emulsion and uniformly covers the surface of flax fabric. When the m(BA)∶m(MMA) = 7∶3, the mass concentration of GO reaches 4 g/L, it shows excellent water repellency and UV protection performance with a water contact angle of 148.48°, a ultraviolet protection factor (UPF) of 179.77, and a transmission rate of 0.63% in the ultraviolet UVA band. Compared with the original flax fabric, the heat resistance, breaking strength and elongation?at?break of the finished flax fabric were improved by 60.67℃, 153 N, and 11.1%, respectively. Meanwhile, the better air permeability of the finished flax fabric were remained. The finished flax fabric has good durability with a water contact angle of 142.00°, UPF of 162.22, and the UVA band transmittance of 0.94% after underwent soap washing tests for 20 times.

Abstract:A series of porous polymers based upon polyacrylic acid crosslinked with Zn/Mn (Zn/Mn/PAA) were prepared by sol-gel method using polyacrylic acid as raw material, Zn2+ and Mn2+ as crosslinkers, and propylene oxide as coagulant. The adsorption performance of Zn/Mn/PAA for uranyl ions (UO22+) were then investigated by adjusting adsorbent dosage, pH, adsorption time, coexisting ions and ionic concentration. The results showed that the prepared Zn/Mn/PAA-2 with a molar ratio of Zn2+ to Mn2+ 1:1, the molar ratio of the total amount of crosskinkers to the polyacrylic acid 10:1, exhibited best adsorption performance for UO22+. Under optimal conditions of pH 4.3, initial UO22+ mass concentration 10 mg/L, adsorption time 30 min, adsorbent dosage 1 g/L and adsorption temperature 25 oC, removal rate of UO22 by Zn/Mn/PAA-2 reached maximum of 82.3% with the adsorption kinetics fitting the pseudo-second kinetic model. In presence of other metal ions, Zn/Mn/PAA-2 displayed selective adsorption for UO22+. The maximum removal rate of UO22+ in different water samples could reach 82.8%. After five times of recycling, the removal rate and desorption rate of UO22+ by Zn/Mn/PAA-2 still remained 65% and 72%, respectively.

Abstract:Abstract: A series of N-methylimidazole-CuCl2 complexes CuLnCl2 (L = N-methylimidazole = N-Mim, n = 1, 2, 4) were synthesized from N-Mim and CuCl2?2H2O and characterized by XRD, FTIR and TG. The catalytic performance of CuLnCl2 in the synthesis of 2, 4, 4, 4-tetrachlorobutyronitrile (TBN) by atom transfer radical addition (ATRA) reaction of CCl4 and acrylonitrile (AN) were compared. The effects of reaction temperature, reaction time, catalyst dosage and synergistic catalytic effect of solvent on the yield of TBN were investigated. The results showed that the Cu active cen-ter constructed by the spatial coordination of CuL2Cl2 showed the best catalytic performance. Under the conditions of acetonitrile (MeCN) as solvent, n(CuL2Cl2)∶n(AN)=1∶1000，n(CCl4)∶n(AN)=1.1∶1，the yield of TBN could reach 91.6% at 100 ℃ for 9 h. After being reused for 4 times, and the activity of catalyst did not decrease significantly. Based on the relevant experimental results, the oxidation-reduction catalytic cycle mechanism of Cu(Ⅱ)/Cu(Ⅰ) in the ATRA reaction of CCl4 and AN catalyzed by CuL2Cl2 was proposed.

Abstract:In order to replace "carbon" with "silicon" for synthetic leather coating materials, polydimethylsiloxane (PDMS) polymer coatings were prepared by in-situ polymerization reaction under thermal induction using divinyl-terminated polydimethylsiloxane (ViPDMSVi), polymethylhydrosiloxane (PMHS), divinyl-terminated polymethylvinylsiloxane (ViPMVSVi), and fume silica as the main raw materials. The properties of PDMS polymer coatings were characterized by mechanical properties, DSC, flexural resistance, abrasion resistance, hydrophobic and antifouling tests, and the effects of ViPDMSVi, PMHS active hydrogen, double bond to active hydrogen molar ratio, ViPMVSVi, and fume silica on the tensile strength, elongation at break and hardness of PDMS polymer coatings were investigated. The results show that the mechanical properties of PDMS polymer coatings were most significantly improved when the mass fractions of ViPMVSVi and fume silica were 7% and 40%, respectively. The tensile strength of the PDMS polymer coating produced under the optimized conditions was 5.96 MPa and the elongation at break was 481%. Synthetic leather coatings exhibit excellent low-temperature flexing, abrasion resistance, hydrophobicity, and anti-fouling properties.

Abstract:Using Ce(NO3)3·6H2O and (NH4)3PO4·3H2O as raw materials, the phosphorylated CeO2 catalysts were prepared by impregnation method, and the denitration performance of phosphorylated CeO2 catalyst for selective catalytic reduction of NO by NH3 as reducing agent (NH3-SCR) was investigated. The physicochemical properties of the catalysts were characterized by XRD, XPS, N2 adsorption-desorption, NH3-TPD and in situ DRIFTS. The results show that the NO conversion rate of the phosphorylated CeO2 catalyst reaches more than 90% in the range of 250~500℃, and the NO conversion rate of the phosphorylated CeO2 catalyst remains above 80% in the range of 300~400℃ after poisoning by alkali metals and alkaline earth metals. The enhanced catalytic performance of phosphorylated CeO2 can be attributed to the increase in the number of acid sites, especially Bronsted acid sites, while improving the reducibility of Ce species and generating more surface adsorbed oxygen. When the alkali metal is deposited on the catalyst, the alkali metal will be induced to migrate to the surface of phosphorylated CeO2 to bind to the Ce—O—P base capture site, thereby preventing the alkali metal from attacking the Ce active site.

Abstract:In this work, a series of polyimides were synthesized in m-cresol by one-step condensation polymerization with diamine monomer m-xylylenediamine (MXDA) and five aromatic dianhydride monomers 4,4'-oxydiphthalic anhydride (ODPA), 3,3',4,4'-benzophenone tetracarboxylic dianhydride (BTDA), 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), and 4,4'-(4,4'-isopropylidene diphenoxy) bis(phthalic anhydride) (BPADA). The structures and properties of the polymers were characterized by FTIR, 1HNMR, DSC, TGA, UV-Vis spectrophotometer, etc. The results show that Inherent viscosity number of PIs are 0.36~1.44 dL/g and all the PIs have good solubility in phenolic solvents. The glass transition temperatures (Tg) and the 5% thermal weight loss temperature of the PIs are 184~243 ℃ and 485~538 ℃, respectively, which implies that they have excellent thermal properties. Furthermore, the transmittances of the PI films are 24%~85% at 400 nm and 69%~88% at 500 nm, and the cutoff wavelengths are in the range of 308~367 nm, demonstrating the good optical properties of these polymers. The tensile strength, young's modulus and elongation at break of PIs are 41.1~85.3 MPa, 1.7~2.1 GPa and 2.5~8.7%, respectively, indicating that the PIs have good mechanical properties .

Abstract:Cinnamyl alcohol can be biotranformed into natural 2-phenylethanol with the endophytic strain Sphingomonas sp.Z45. To improve the conversion yield of cinnamyl alcohol and the concentration of 2-PE, the biotransformation conditions in organic solvent-water biphase system were investigated. Oleic acid was selected as the organic phase of the biphase system. 1 mL seed liquid was inoculated in 10 mL fermentation medium and cultured for 24 h, and then 10 mL oleic acid and 3 g/L cinnamyl alcohol were added. The reactions were performed at 30 ℃ and 200 r/min for 12 h, the conversion of cinnamyl alcohol reached 88%, and the final concentration of 2-phenylethyl alcohol was 2.64 g/L. Compared with the result of the mono-aqueous system reaction under the same conditions（the amount of cinnamyl alcohol added was 3.0 g/L), the conversion yield of cinnamyl alcohol and the concentration of 2-phenylethanol were increased by 88% and 120% respectively.

Abstract:The base film was prepared by dissolving and regenerating microcrystalline cellulose (MCC) with 1-butyl-3-methylimidazole chloride ([Bmim]Cl) as solvent system. The antibacterial composite film was prepared by coating chitosan (CS) and silver nanowire (AgNW) blend solution. The morphology and structure of the composite film were characterized by Fourier infrared spectroscopy, X-ray diffraction, scanning electron microscopy and thermogravimetric analysis, and the mechanical, optical and antibacterial properties were tested and analyzed. The results showed that chitosan and silver nanowires were successfully compounded on the cellulose based film. Compared with the regenerated cellulose film, when the mass fraction of AgNW was 0.5%, the tensile strength of the composite film increased by 12.2%, the light transmittance of the film remained at 89.82%, and had a good inhibitory effect on E. coli. A degradable cellulose / chitosan / silver nanowire antibacterial composite film with excellent mechanical, optical and antibacterial properties was prepared.

Abstract:With the development of economy society, wastewater treatment has become the focus of people's attention. Montmorillonite has been widely used in the field of wastewater treatment because of its advantages of cheap, easy to obtain and abundant reserves. At present, adsorption materials based on montmorillonite mainly focuses on single modification, such as acid modification, organic modification, but the single modification of montmorillonite has the problem of single function and poor activity. In this paper, the research progress of composite modified montmorillonite, for example, acid-organic modification, inorganic-organic modification and organic anionic cationic surfactant modification are reviewed. The preparation process and adsorption mechanism of composite modified montmorillonite are analyzed. The main research directions in the future are proposed. It is suggested that the main research direction of composite montmorillonite in the future is to synthesize the montmorillonite which can be easily separated from solution and can treat all pollutants in a variety of ways, such as the synthesis of composite montmorillonite with adsorption, photocatalytic and Fenton oxidation ability. This paper may provide some reference for the practical application of montmorillonite in the area of wastewater treatment in future.

Abstract:A coil-tube continuous flow reactor embedded with a special type of continuous spiral static mixing piece was designed and used for preparing nucleating agent intermediate diaryl phosphoryl chloride efficiently. At the flow rate ≥ 0.4 m/s (180 mL/min) and precipitation mass fraction ＜ 10%, the precipitation triethylamine hydrochloride could flow stably with the liquid phase in strong turbulent flow field, which successfully solved the serious clogging problem in reaction channel. The millimeter scale of the reactor maintained the great mass transfer characteristics. The rapid and uniform mixing of reactive materials could be conducted at high flow rates, and the throughput was greatly increased. The optimum synthesis process in this continuous flow reaction system was obtained: empty pipe was used in the last 20% section of the coil tube to reduce the overall pressure drop of the reaction system; T-jet was used to mix the reaction materials; residence time was 3.5 min and reaction temperature was 90 oC; n(diaryl phenol) : n(triethylamine) : n(POCl3) = 1 : 2.8 : 1.1; the initial feed concentration of diaryl phenol and POCl3 were 0.29 and 0.32 mol/L, respectively. The product yield increased from nearly 90% of batch synthesis to 96%, and the space time yield (STY) increased by 43~44 times.

Abstract:The interfacial bonding performance is of great significance to the preparation of composite materials with excellent performance. To study the combination of dicyclopentadiene (DCPD) and glass fiber (GF), we com-pared DCPD with equivalent epoxy resin and developed a kind of DCPD resin with favorable combination perfor-mance with glass fiber. Glass fiber reinforced PDCPD-based composite material with excellent comprehensive performance were prepared based on this. Through dynamic contact angle, 90? tensile strength and interlaminar shear strength experiments, the adhesion and the interface performance difference between different resins and glass fiber were measured. The results showed that SCB-600 DCPD resin has favorable bondability with glass fiber. The dynamic contact angle is 60.35??0.3?, the 90? tensile strength is (42.3?1.6) MPa, and the interlaminar shear strength is (61.3?3.2) MPa, which is equivalent to 1564 epoxy resin. The DCPD resin mass fraction was further optimized. When the resin mass fraction is (30%?2%), the glass fiber reinforced SCB-600 DCPD showed relatively optimal mechanic properties: the tensile strength of (1180.1?4.1) MPa, the bending strength of (1060.4?4.6) MPa, and the notched impact strength of (145.3?4.8) KJ/m2. Its flexural strength and tensile strength are basically equivalent to those of glass fiber reinforced epoxy resin-based composites, but notched impact strength is better than that of 1564 epoxy resin.

Abstract:Taking hypoglycemic peptides as models, Eudragit L-100 and HPMC as the carriers, the solid dispersions of hypoglycemic peptides were prepared by Solvent method, and their stability and in vitro release were studied. In this paper, the cumulative release rate and DPP-IV inhibition rate of the glycemic peptide solid dispersion at 2 h were evaluated, and the solid dispersion was characterized by scanning electron microscopy, Fourier infrared spectroscopy and transmission electron microscope by optimizing the ratio of enteric-coated carrier and release regulator, and the stability of the solid dispersion under different storage times and storage temperatures was investigated. The results showed that the optimal proportion of glycemic peptide solid dispersions was hypoglycemic peptides: Eudragit L-100: HPMC=1:2:0.2, and the cumulative release of the solid dispersions prepared under this ratio for 2 h could reach 93.54%, and the DPP-IV inhibition rate still had a high level. Scanning electron microscopy and transmission electron microscopy images show that the active peptide is dispersed in a solid dispersion, and infrared spectroscopy indicates that the conformation of the secondary structure of the active peptide has changed. After making a solid dispersion, the stability of hypoglycemic peptides was significantly enhanced, and the cumulative release rate after 10 days of storage at room temperature was still as high as 90.32%, which also showed strong stability in high temperature environment. In summary, the use of solid dispersion technology can significantly improve the stability and cumulative dissolution rate on the basis of maintaining the physiological activity of hypoglycemic peptides, and this method has great reference value for the comprehensive utilization of active peptides, especially the research and development of functional foods based on active peptides.

Abstract:In order to solve the problems of floating color and heavy washing after continuous dipping dyeing of polyester fabric, nanoscale disperse dye microcapsules (NDDM) with disperse dye as core and P(MMA-co-BA) as shell were prepared by emulsion polymerization method. The effects of core-shell feeding ratio, MMA and BA ratio, curing temperature and time on dyeing properties were investigated. The results showed that the color fastness and levelness of NDDM pad dyed fabrics were better than those of C.I. Disperse Violet 93 pad dyeing fabrics. When the core-shell feeding ratio was 1:2, MMA:BA feeding ratio was 1:1, curing temperature was 180 ℃, curing time was 5 min, the color properties of NDDM pad dyed fabrics were better, and their hand feel was close to that of the original polyester. Without washing, the color fastness was 4 or 4-5, and the COD value of reduction cleaning was 312.3 mg·L-1, which decreased by 58% compared with C.I. Disperse Violet 93 dyeing. Under high temperature conditions, disperse dyes in NDDM migrate out of the polyacrylate shell in molten state and dye polyester. The polyacrylate shell covers and binds the residual dyes on the surface of fiber.

Abstract:This article reviews the development methods and current situation of SF6 substitutes for power insulation. Its development methods include molecular design and confirmation (physical properties, safety evaluation, environmental impact evaluation, etc.) of substitutes, synthesis, and industrialization. At present, the developed SF6 substitutes include SF6 mixed gas, saturated and halogenated hydrocarbons, hydrofluoroolefins, perfluoroketones and perfluoronitriles. Among them, heptafluoroisobutyronitrile is currently the best-performing substitute for SF6 due to its excellent insulating properties. Meanwhile, the existing synthetic routes of heptafluoroisobutyronitrile are reviewed as well, of which catalytic reaction to synthesize heptafluoroisobutyronitrile with hexafluoropropylene and carbonyl fluoride as the starting materials has the advantages of high efficiency, greenness and environmental friendliness. Based on the past development process and the present situation of discovery, the future development trend of SF6 substitutes is prospected. It is proposed that future research should focus on the comprehensive development of heptafluoroisobutyronitrile application, and the development of next-generation SF6 substitutes including their green and efficient industrialization routes.

Abstract:Taking 2,6-dichlorophenol (2,6-DCP) as the target pollutant to degrade 2,6-DCP in the background of nitrite (NO2-) coexistence by combined activation of persulfate process by UV and carbon nanotubes (UV/PS/CNTs). The influencing factors and degradation mechanism were investigated, and the cyclic activation potential and by-product generation of the system were investigated. The results showed that the reaction time was 30 min, reaction temperature was 25 ℃, the concentration of 2,6-DCP was 0.05 mmol/L, the concentration of NO2- was 0.2 mmol/L, the dosage of PS was 0.5 mmol/L, and the dosage of CNTs was 50 mg/L, the degradation rate of 2,6-DCP by UV/PS/CNTs system was 95.9%. In this system, the degradation rate of 2,6-DCP increased with the increase of PS and CNTs concentration, and decreased with the increase of NO2- concentration. The solution pH on the degradation of the target compounds showed a trend of increasing first and then decreasing，the degradation rate of 2,6-DCP was 99.8% and 0.3483 min-1 at pH 9.0. CNTs have good recycling performance, and 89.0% of 2,6-DCP could still be removed after 5 repeated experiments, the degradation effect in actual water is good. The mechanism analysis showed that the degradation of 2,6-DCP in this system followed a non-radical oxidation pathway dominated by singlet oxygen, and monochloronitrophenol by-products were generated during the reaction.

Abstract:In order to improve the acidizing effect of acid in heterogeneous reservoir, an acidizing self-diverting agent was synthesized. An acidizing self-diverting agent ADDA with low viscosity and automatic thickening with acid rock reaction was obtained by free radical aqueous solution polymerization of four kinds of monomers, AM, DMAPMA, DMAAC-18 and ACMO. The best synthetic conditions were as follows: the molar mass ratio of AM:DMAAC-18:DMAPMA:ACMO was 90:1.8:10:10, the amount of initiator (V50) was 0.5% of the total monomer mass, the monomer concentration was 30%, the reaction temperature was 55 ?C, the reaction time was 6 h, the system pH was 7. The structure of the product was characterized by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance spectroscopy (1H-NMR). The results showed that the molecular structure of ADDA was consistent with the design structure. At 90 ℃, the apparent viscosity of 1.3% ADDA acid solution can increase from 6 mPa?s to 126 mPa?s, which has good diverting performance. The apparent viscosity of 1.3% ADDA spent acid is 70 mPa?s after shearing at 90 ℃ for 1h at 170s-1, indicating that ADDA spent acid has good temperature resistance. The compatibility results showed that at 90 ℃, the apparent viscosity of 1.3% ADDA diverting acid of spent acid with acidification admixture was increased by 54 mPa?s compared with 1.3% ADDA diverting acid without acidification admixture, indicating good compatibility.

Abstract:Silicon is considered as one of the most promising anode materials with high capacity for lithium-ion battery due to its high theoretical specific capacity. Binder is an important part of lithium-ion battery, its adhesion performance quality directly affect the capacity and cycle performance of the electrode. However, commonly used commercial binders have relatively single function, which can not meet the requirements of high energy density battery to a certain extent. Therefore, the functional modification of binders is one of the important means to improve electrode capacity, long cycle and safety performance. In this paper, the latest research progress of functional binders for silicon-based anodes in lithium-ion batteries is reviewed. The self-healing binder, conductive binder and flame retardant binder are focused on. Finally， the development trend of binder for silicon-based anodes is prospected.

Abstract:The Mn-CeOx/AC@CNTs catalyst was prepared by impregnation method using carbon@carbon nanotubes (AC@CNTs) support. And the catalytic performance of the addition of Fe species to Mn-CeOx/AC@CNTs for the simultaneous nitrogen monoxide (NO) reduction and chlorobenzene (CB) oxidation were investigated. The physical and chemical properties of the catalyst were characterized by SEM, XRD, Raman, FTIR, XPS, H2-TPR, and other methods. The results show that the introduction of Mn species into CeO2 with a large ionic radius, which forms a Mn-Ce solid solution and promotes the generation of oxygen vacancies, and abundant C—H groups and oxygen-containing groups existed on the catalysts surface are beneficial to improve the low-temperature catalytic activity. Additionally, compared with the Mn-CeOx(1:7)/AC@CNTs (n(Mn):n(Ce) =1:7) catalyst, the relative proportion of oxygen adsorbed surface and the amount of medium acid increased significantly on the Fe-Mn-CeOx(1:7)/AC@CNTs catalyst, making it have the good redox properties and surface acidity. The Fe-Mn-CeOx(1:7)/AC@CNTs catalyst shows the highest catalytic activity throughout the temperature window, with the NO conversion reaches >90% at 225～300 ℃, and the CB conversion >90% at 300 ℃. In addition, the NO conversion of Fe-Mn-CeOx(1:7)/AC@CNTs catalyst reaches 95% at 300℃ when CB is present.

Abstract:The 2-methylthiobenzothiazoleis (MTBT) synthesized from the substrate of 2-mercaptobenzothiazole (MBT) and the methyl source of tetramethylammonium chloride (TMAC) by electrolysis method under the normal temperature and pressure condition. The solution with volume of 100 mL, c(MBT)=0.1mol/L and n(TMAC):n(MBT)=3:1 was electrolyzed under the condition of the quantity of electricity is 1.5 times of theoretical value (964.85 C), the yield of MTBT is higher than 88%. The DFT study believe that the species coming from electro-reduction of TMAC accelerate the electro-oxidation of MBT and formation of MTBT, this is in accord with experimental results.

Abstract:In this paper, five different NHCs catalyst precursors were grafted onto the surface of attapulgite to form five supported NHCs catalysts. The five catalysts were characterized by FT-IR, elemental analysis, BET and SEM, and characterization results showed that NHCs catalyst precursors were successfully immobilized on the surface of the attapulgite. Further experimental results showed that these supported NHCs can be used as efficient catalysts for benzoin condensations. Then, the optimal conditions of the benzoin condensation catalyzed by these supported catalysts were explored. It was discovered that the optimized conditions employed BTBCl@ATP (Catalyst B, 1 mmol% imidazolium salt) as catalyst, 0.4 equiv. NaOH as base and 2ml CH3OH as solvents at 110oC in Ar atmosphere. Under this optimized condition, the supported NHCs catalyst could catalyze benzoin reactions of various aromatic aldehydes with 61-86% yields. The reuse experiment of the catalyst showed that these supported catalysts can be simply separated from the reaction system, and the catalytic activity of these supported catalysts does not decline significantly after reuse for four times.

Abstract:A series of tristyryl phenol polyoxyethylene ether sulfates salt (TSPOES) with different ethylene oxide (EO) numbers were synthesized with tristyryl phenol polyoxyethylene ethers (TSPOE), sulfamic acid and urea as original materials. Liquid disperse dyes were prepared using TSPOES as dispersant, and the storage stability of liquid disperse dyes was explored through particle size analysis, then the dyeing properties of liquid disperse dyes with good storage stability were explored. The results showed that the content of anionic active substances（ TSPOES )was above 85% when the molar ratio of TSPOE to sulfamic acid was 1:1.6. With increasing of the EO number of dispersant TSPOES, the particle size and PDI of the prepared liquid disperse dyes decreased first and then increase. When the EO number of dispersant TSPOES was 20, the particle size of the prepared liquid disperse dyes was 165.9 nm, the according PDI was 0.195. At the same time, its storage stability

Abstract:Element doping is known to not only modify the electronic structure but also improve the electrochemical activity of electrode materials. Aluminum-doped NiCo2S4 composite electrode material (CC@Al-NiCo2S4) was successfully grown on carbon cloth(CC) via a two-step hydrothermal method with conductive carbon cloth as substrate, nickel chloride and cobalt chloride as raw material, aluminum nitrate as a aluminum source. Scanning electron microscopy shows that the hollow nanotube structure of CC@Al-NiCo2S4 can provide a large number of reaction sites; X-ray photoelectron spectroscopy shows that aluminum mainly exists in CC@NiCo2S4 in the form of Al3+, which can improve the conductivity of CC@NiCo2S4. Based on the results by the electrochemical performance, the specific capacitance of the original CC@NiCo2S4 electrode is 844.5 F/g at the current density of 1 A/g, and the specific capacitance of Al-doped CC@NiCo2S4 is 1515.8 F/g. After 10000 cycles at a current density of 6 A/g, the capacitance retention rate of CC@Al-NiCo2S4 is as high as 87.8%, indicating that aluminum doping can significantly improve the specific capacitance and cycle stability of CC@NiCo2S4.

Abstract:In this paper, ultrasonic modified soy protein was used as emulsifier and gel matrix to prepare soy protein emulsion gel induced by glucono-δ-lactone (GDL), and the effects of ultrasonic treatment on the emulsion and emulsion gel properties of soy protein and the transport properties of quercetin were investigated. Through the analysis of intermolecular interaction and texture properties of emulsion gel, the optimized ultrasonic conditions were determined, which were ultrasonic power 400 W, temperature 55 °C, and time 30 min. The test results showed that the ultrasonic modification destroys the hydrophobic interaction inside the protein, exposes the hydrophobic groups, and increases the charged groups, led to a decrease in the average particle size of the emulsion, an increase in the absolute value of the Zeta-potential, an increase in the interface protein content, and a decrease in the apparent viscosity. After the ultrasonic modification treatment, the final G'value of the soy protein emulsion gel increases, and the degree of gelation gradually increases, forming a gel material that is closer to elastic properties; the relaxation time in low-field NMR decreased, the peak ratio distribution changes, the hydration characteristics of the emulsion gel increase, and the ability of the dense gel structure to bind water molecules is enhanced. At the same time, microscopic observations showed that the modified soybean protein emulsion gel had a more uniform porous structure, and the oil droplets were better embedded in the network structure of the gel. In addition, ultrasonic treatment improved the transport properties of soy protein emulsion gels. The experimental results showed that the encapsulation rate, bioavailability and lipolysis rate of ultrasonically modified soy protein quercetin emulsion gels were significantly improved. The ultrasonic modification treatment has laid a theoretical foundation for the development of a protein emulsion gel delivery system with excellent performance.

Abstract:Transition metal catalyzed allylic functionalization reaction plays an important role in organic synthesis, and is an important method to construct carbon-carbon bonds and carbon-heteroatom bonds. With its unique stereochemical properties, the sulfoxide ligand not only achieved excellent results in the traditional (Tsuji-Trost) allylic substitution reaction, but also showed great potential in the allylic C-H activition. According to the catalytic reaction mechanism of the allylic palladium intermediate and the coordination mode of the sulfoxide ligand, the research progress of sulfoxide ligands in the traditional allylic substitution, allylic C-H functionalization and asymmetric allylic C-H functionalization in recent years is summarized, points out the key factors and existing problems that affect each catalytic system and made a prospect for the future development.

Abstract:To design and synthesis of indole schiff base derivatives and investigate their anti-HIV-1 activities. Indole Schiff base derivatives were synthesized from 3-indole-formaldehyde derivatives by aldehyde-amine condensation with aromatic amines under the catalysis of base. The anti-HIV activities was determined by MTT assays in MT-4 cells.Thirty-two indole schiff base derivatives were synthesized and the structures have been confirmed by 1H NMR and MS spectra. The preliminary biological results showed that all synthesized indole schiff base derivatives had good inhibitory effect on HIV-1 growth, and a broad spectrum of anti-HIV activities. Specifically, compound 31 (EC50 = 0.06 mol/L) exhibited the greatest anti-HIV potency, which was equipotent to reference drug delavirdine. Moreover, the toxicity of compound 31 was very low, and the selectivity index (SI) was as high as 2500, which was significantly higher than that of delavirdine (DLV, SI = 1272.9) and efavirapine (EFV, SI = 321g). Indole and schiff base unit are both important anti-HIV pharmacophore, HIV-1 non-nuclear nucleoside reverse transcriptase inhibitors (NNRTIs) with high efficiency and low toxicity can be obtained by coupling of indole and Schiff base, and this study provides a new idea for the development of new, structurally diverse NNRTIs.

Abstract:Tanning is a magical procedure for the transformation from raw hides to leather. Chrome tanning agents play a leading role in leather production due to excellent penetration and comprehensive performance. Whereas the restrictions on waste emission contain Cr increase around the world in recent years, it’s necessary to develop and promote chrome-free tanning agents. Nature polysaccharide biomass materials allow for adjustable molecular size, abundant functional groups and excellent penetration, but they show insufficient tanning. A large amount of metal ions in nanomaterials contribute to firm crosslinks with collagen fibers and poor permeability of nanomaterials. Therefore, if polysaccharide biomass materials can be integrated with nanomaterials, the composite could take advantages of these two resources to replace chrome tanning agents, thus achieving environmentally friendly chrome-free tanning in the future. In this review, latest progress about chrome free tanning agents is summarized, especially for the investigation and application of polysaccharide (like starch and cellulose) and nano(like montmorillonite and hydrotalcite) series tanning agents. Accordingly, the current issues and future trends of chrome-free leather tanning agents were discussed.