Abstract:Abstract: Active clay containing magnesium (AC-Mg) was prepared by composite modification with active clay as raw material. As an efficient adsorbent, AC-Mg reacted with low concentration ammonia nitrogen and phosphorus in simulated wastewater. BET, XRD, SEM, FTIR and particle size of the recovered products were analyzed by the modified active clay and reaction. The mechanism of low concentration ammonia nitrogen removal and recovery, the effect of reaction temperature and initial pH of solution on the effect were investigated. The results showed that the removal equilibrium was achieved under the conditions of ammonia nitrogen concentration of 60mg/L, phosphorus source concentration of 60mg/L and temperature of 25℃ for 2.5h. The removal process of ammonia nitrogen conforms to the quasi-second-order kinetic model (R2 > 0.98), and the adsorption of ammonia nitrogen is affected by both surface diffusion and internal diffusion. The adsorption process was in accordance with Langmuir model (R2=0.9983), and the maximum unit removal was 37.05mg/g, of which adsorption removal was 5.56 mg/g and crystallization reaction removal was 31.49mg/g. The optimal pH of this method is 9.0, and the removal rate of ammonia nitrogen is 54.57%.

Abstract:Recently, membrane separation technology has been widely used in the separation and recovery of organic compounds. Pervaporation has a great prospect in the field of organic separation and recovery because of its advantages of low cost, mild conditions, simple equipment, and no pollution. It can effectively separate azeotropic mixture, near-boiling mixture, isomers, heat-sensitive compounds, and other organic compounds, which is widely used in industrial production. In this paper, the research status of preferentially permeable organic compounds was reviewed. Firstly, the influence of the material on the structure and characteristics of the membrane, the influence of preparation and modification methods on membrane properties were analyzed. The application of pervaporation membrane in the separation and recovery of organic mixtures was discussed emphatically. The problems existing in pervaporation technology were summarized and the future research direction and ideas of preferentially permeable organic compounds had been prospected. With the help of new computational tools, the material selection, preparation, and modification method were emphasized, so that the pervaporation membrane will have a broader application prospect.

Abstract:Microbial electrosynthesis (MES) provides a sustainable biochemical transformation path for the reduction of carbon dioxide to acetate and other multi carbon substances. Using electric energy to drive microorganisms to fix CO2 has the characteristics of easy raw materials, mild operating conditions, no toxic substances and environmental sustainability, which brings new opportunities for global carbon neutralization and carbon emission reduction. Under the in-depth study of researchers on improving yield, conversion efficiency and carbon chain extension, based on the selection and modification of electrode materials, the domestication of flora and the limitation of operating conditions, the maximum yield of acetic acid was 1330g / (m2 ? d). The C2-C4 products and medium chain fatty acids with longer carbon chain were produced by catalytic conversion of C1 waste gas and coupled secondary fermentation. On the basis of summarizing the molecular mechanism of cathodic electroactive microorganisms absorbing extracellular electrons, capturing and transforming CO2, the metabolic principle of synthetic organic acids, the application status of two-dimensional and three-dimensional electrode materials, and the methods to improve product yield, product and carbon chain extension are reviewed, and the research direction of MES in the future is prospected.

Abstract:The N—Cl type haloamine antibacterial agent has high-efficiency, fast, stable, safe, and renewable antibacterial properties. The antibacterial materials developed by it are widely used in medical and health, textile, water filtration and other fields. However, during the application of the N—Cl type haloamine antibacterial material, the action of ultraviolet light will break the N—Cl bond on the material or the covalent bond between the antibacterial agent and the material matrix, resulting in a decrease in the content of active chlorine, which in turn causes a decrease in its antibacterial performance. How to improve the UV stability of halamine antibacterial materials has attracted the attention of scholars at home and abroad. This paper first describes the types of N—Cl halamine antibacterial agents and the two factors that cause the decrease of the chlorine content; then, it reviews the research on improving the UV stability of the halogen amine by changing the structure of the halogen amine precursor and introducing nano-TiO2, nano-ZnO, AgCl inorganic particles and organic UV absorbers; finally, the problems and challenges faced by the institute are discussed, and its future development trend is prospected.

Abstract:Organic photodetectors have attracted much attention in frontier science and technology fields such as image display, optical communication, and biosensing due to their tunable detection wavelength, low-cost fabrication, and easy compatibility with flexible/lightweight devices. The photoactive layer is the core functional layer for organic photodetectors. As an important class of photosensitive materials, Phthalocyanine compounds have great potential for application in the photoactive layer because of the narrow and tunable optical bandgap, excellent physicochemical stability, and high photogenerated carrier efficiency. In this review, the structure, properties, and classification of phthalocyanine compounds were first introduced. Then, the detection principle, basic structure, and photoelectric properties of photodetectors were briefly described. Further, the research progress and influencing factors of different types of phthalocyanine compounds in the preparation of photoactive layer, regulation of detection wavelength, and global optimization of device performance were comprehensively reviewed and analyzed. Lastly, the future development direction of phthalocyanines in the field of organic photodetectors was summarized and prospected.

Abstract:This paper reviews the research progress in the preparation of blue, green, and red carbon dots (CDs) by carbonization, microwave, and water (solvent) thermal methods in recent years. The different properties of three-primary carbon dots prepared by different methods were analyzed. The main factors affecting the fluorescence color of CDs are summarized, including the types and concentrations of precursors, the types of reaction solvents, and the reaction temperature. The main challenges currently faced in the preparation of three primary color CDs are pointed out, and the potential solution to control the emission wavelength of CDs at 460 nm, 550 nm and 630 nm accurately is proposed. From the perspective of industrial application and intelligent response, the development direction of the series of fluorescent colors synthesized by the additive color method of three-primary CDs is prospected.

Abstract:Zeolitic imidazolate framework-8 (ZIF-8) is a porous crystalline material formed by the coordination and self-assembly of zinc (Ⅱ) and 2-methylimidazole. Due to the excellent performances of huge specific surface area, excellent pore structure and abundant surface functional groups. ZIF-8 have great potential in the treatment of water pollution in recent years. Firstly, the research progress of ZIF-8 in water treatment adsorption in the past three years were mainly reviewed. And analyze the influence of the water stability of ZIF-8 and environmental factors on the adsorption of pollutants in water by ZIF-8. Moreover, the challenges and prospects of ZIF-8 materials in environmental governance are briefly discussed, which provides references for future research and practical applications.

Abstract:An eco-friendly and low-cost hydrogel of BT-g-CMC were prepared vis chemical cross-linking, its structure and morphology were characterized, and it was used for phosphorus recovery from wastewater and slow-release phosphorus fertilizer. The adsorption studies indicated that the hydrogel showed good affinity for H2PO4- with an adsorption capacity of 18.78 mg/g at 298K when the quality ratio of CMC/BT was 1:1. The adsorption system could reach equilibrium within 120 min. Afterward, the phosphate-rich BT-g-CMC1.0 hydrogel was used as slow-release fertilizer (SRFs). The results showed that the product with excellent water-retention and slow-release capacities. The pot experiments showed that the SRFs played a positive role in vegetable growth. The soil remediation experiment displayed that 82.9% of Cr (Ⅲ) in the soil could be inhibited when SRF dosage was 0.3g for three times leaching. Therefore, SRFs has broad industrial and green agricultural applications.

Abstract:Huperzine A (Hup A)is as an acetylcholinesterase inhibitor used to treat Alzheimer's disease. We present a new the molecularly imprinted polymers( MIP), which can well control the release of Hup A. The MIP were prepared by precipitation polymerization using Hup A as template, methacrylic acid（MAA）as functional monomer, ethylene glycol dimethyl acrylate as the crosslinking agent. The synthesized MIP were characterized by SEM、TGA and FT-IR spectrometer. The performance of MIP was evaluated by static adsorption, dynamic adsorption, in vitro drug release and MTT. The results showed that MIP had specific and nonspecific binding sites to Hup A. Hup A tablets were rapidly released within 1 hour, and the cumulative release rate was more than 90%. MIP release gently after 1h and reach equilibrium near 24h, which can achieve the effect of slow release. The release kinetics conforms to the Peppas model and the release index is n = 0.48, which implies a non Fickian diffusion mechanism. The biocompatibility of MIP was good. The cytotoxicity data of L929 mouse fibroblasts to MIP showed that the cell survival rate was higher than 93%. were prepared by precipitation polymerization using Hup A as template, methacrylic acid（MAA）as functional monomer, ethylene glycol dimethyl acrylate as the crosslinking agent. The synthesized MIP were characterized by SEM、TGA and FT-IR spectrometer. The performance of MIP was evaluated by static adsorption, dynamic adsorption, in vitro drug release and MTT. The resμlts showed that MIP had specific and nonspecific binding sites to Hup A. Hup A tablets were rapidly released within 1 hour, and the cumulative release rate was more than 90%. MIP release gently after 1h and reach equilibrium near 24h, which can achieve the effect of slow release. The release kinetics conforms to the Peppas model, and the release index n = 0.48, which is a non Fickian diffusion mechanism. The biocompatibility of MIP was good. The cytotoxicity data of L929 mouse fibroblasts to MIP showed that the cell survival rate was higher than 93%.

Abstract:Nanocomposite TiO2/WO3/Bi2WO6 photocatalysts were firstly prepared from anatase TiO2 nanoparticle-doped WO3/Bi2WO6 nanosheets, which were synthesized via hydrothermal reaction of sodium tungstate dihydrate and bismuth nitrate pentahydrate at optimized temperature, and then went through surface modification by a high density tubular plasma discharge device. The samples were characterized and analyzed by XRD, SEM, TEM, HRTEM, XPS, UV-Vis DRS and PL followed by investigation of their photocatalytic performance on methylene blue (MB) degradation in water under visible light irradiation. The results showed the the optimal hydrothermal reaction temperature was 120 ℃, at which WO3/Bi2WO6 nanosheets synthesized displayed better photocatalytic performance. Moreover, The TiO2/WO3/Bi2WO6 nanocomposites doped with 10.7 wt% anatase TiO2 nanoparticles exhibited significant photocatalytic activity enhancement in comparision to WO3/Bi2WO6 nanosheets. More importantly, the tubular plasma discharge surface modification made the absorption edge of the TiO2/WO3/Bi2WO6 nanocomposites redshift at visible light, and the increase of discharge input power helped improve the photocatalytic activity of the nanocomposite. At peak discharge voltage of 1.1 kV, the degradation rate constant of the composite was 2.2-fold and 3.9-fold those of TiO2/WO3/Bi2WO6 without surface modification and WO3/Bi2WO6 nanocomposites, respectively.

Abstract:In order to solve the problem of low transfer efficiency of polymer inclusion membrane. A kind of matrix enhanced PIM using PVC as a polymer backbone as well as containing both solid and liquid carriers was prepared in this work. N-hydroxyn-octanamide (OHA) was employed as a novel carrier to be immobilized in the pore of the matrix, and the synergistic effect of OHA with the organic extractant di (2-ethylhexyl) phosphate ester (D2EHPA) was used to achieve effective mass transfer. The prepared matrix enhanced PIM was investigated and characterized by SEM, EDS, FTIR, XPS, mechanical properties and mass transfer performance. The results showed that the matrix enhanced PIM with a carrier ratio of 22% OHA + 17% D2EHPA was the most effective for the 10h recovery of 50 mg/L Zn_²⁺, with 59.86% and 51.10% extraction and stripping extraction rates, respectively. The initial mass transfer flux of matrix enhanced PIM was 587.36 mg.m_^-2.h_^-1 in five cycles, which was approximately twice that of PIM with only liquid extraction agent (312.64 mg.m_^-2.h_^-1). At the end of 5 cycles, the mass transfer flux of matrix enhanced PIM was still higher than that of PIM with only liquid extraction agent.

Abstract:In view of the poor water-solubility of melanin, this study extracted and purified melanin from the waste apricot shell and modified it with amino acids. The results showed that arginine and DL-arginine had the best modification effects, and the water-solubility was improved obviously. The best modification quality ratio was 1:4.5 and 1:1.5, respectively; then the stability, water?solubility and antioxidant properties of melanin before and after arginine and DL-arginine modification were compared. After modification with arginine and DL-arginine, the stability of melanin in the kernel and shell of apricot had no significant change, water solubility was improved, and it still had strong antioxidant and bacteriostatic effects. Finally, the dyeing performance of arginine modified melanin in apricot kernel shell was investigated and the optimal staining conditions were determined as follows: dyeing temperature 60 ℃, mass concentration of arginine modified melanin in apricot kernel shell 0.08 mg/mL, bath ratio 1:10, staining 4 times. This study provides a theoretical basis for the development of efficient natural food?additives and colorants with rich sources and non-toxicity.

Abstract:In this paper, ultra-high pressure micro-jet was used to separate and extract β-glucan from Euglena (EBG). The effects of microfluidizing time, microfluidizing pressure, solid-liquid ratio and sodium dodecyl sulfate (SDS) concentration on the extraction rate of EBG were studied by single factor experiment and response surface optimization design experiment, and its structure was characterized by Congo red experiment, FT-IR, XRD and SEM. The results showed that the optimum extraction conditions of β-glucan from Euglena were as follows: microfluidization time of 93 s, microfluidization pressure of 340 bar, solid-liquid ratio of 1∶270 g/mL and SDS concentration of 4.2 g/L. Under these conditions, the extraction rate of EBG was 80.27%, which was close to the theoretical value of 81.69%. Congo red experiment, FT-IR, XRD and SEM results show that EBG has an orderly triple helix structure; the crystallinity of EBG decreases; SEM test results show that cracks and voids appear on the surface of EBG. By measuring the DPPH? scavenging capacity of Euglena β-glucan standard (EBGS) and EBG, the results showed that the DPPH? scavenging rate of EBGS and EBG was basically the same at the concentration of 0.4~2.0 mg/mL, and the DPPH? scavenging rate of EBG reached 50.26% at the concentration of 4.0 mg/mL, which was higher than that of EBGS by 35.14%.

Abstract:Ni-NCNT/AC catalyst support was prepared by in-situ synthesis of Ni single atom confined Ni-NCNT carbon nanotubes on the surface of activated carbon, and Ruthenium catalysts loaded on these support was prepared by impregnation method and degrade acetic acid wastewater.The morphology, structure, element valence, surface adsorption and chemical properties of the samples were analyzed and density functional theory(DFT) calculated by scanning electron microscope(SEM), transmission electron microscopy(TEM), X-ray absorption spectrum(XAFS), X-ray electron energy spectra(XPS),temperature-programmed reduction(H2-TPR) and Carbon monoxide diffuse reflectance infrared Fourier transform spectroscopy(CO-DRIFTS).The results show that Ni single atom as a catalytic promoter can promote the surface precious metals to play a higher catalytic activity for the oxidation of acetic acid by changing the electronic properties of the substrate material.Under the conditions of temperature 250℃, pressure 6.5MPa and continuous operation for 10 days, the removal rate of acetic acid remained stable at more than 95%, and the catalyst had high activity and good stability.

Abstract:A DES (deep eutectic solvent)-based two-phase system (TP-DES) was designed for simultaneous extraction and separation of flavonoids, terpene trilactones (TTLS), procyanidine (PAC), and ginkgolic acids (GAs) from Ginkgo biloba exocarp in our previous work. EOPO and microporous resin were used to recover hydrophilic and hydrophobic ingredients from TP-DES, respectively. Terpene lactones, flavonoids glycosides, and procyanidins were determined by spectrophotometry, and GAs was determined by HPLC. The contents of active components in each step of recovery process were determined for the calculation of the recovery effect respectively. EOPO solution (the molecular weight was 2650) of 90% (w/w) was used to recover flavonoids, TTLS, PAC, and the recovery rates were 89.44%, 53.27%, and 29.77%, respectively. HYA502B resin was used to recover GAs, and the recovery rate was 93.33%. operation, and have good application prospects.

Abstract:In order to develop of the efficient catalytic epoxidation of methyl oleate (MO) macromolecules to prepare the green plasticizer of the epoxidized methyl oleate (EMO). Titanium silicalite-1 (TS-1) and Silicalite-1 (S-1) were synthesized using conventional hydrothermal method, and small sized TS-1 (TS-1-s) and S-1 (S-1-s) catalysts were successfully prepared by steam-assisted crystallization. The effects of sol drying temperature, mass ratio of sol to water, steam-assisted crystallization temperature and crystallization time on the microstructure and catalytic performance of TS-1-s catalyst were investigated. Furthermore, the structure of catalysts was systematically characterized by XRD, UV-Vis, SEM and TEM. The results show that TS-1-s catalyst exhibits better catalytic performance (MO conversion 53.58%, emo selectivity 85.48%) than traditional large grain TS-1 catalyst (MO conversion 39.2%, EMO selectivity 82.56%).

Abstract:SiO2-supported MoP (MoP/SiO2) catalyst was prepared by using molybdenum acetylacetonate and ammonium hypophosphite as raw materials through wetness impregnation method, which was reduced at high-temperature reduction without calcination, The obtained MoP/SiO2 catalyst was characterized by XRD, N2-physisorptions, TEM and XPS to study the effect of P/Mo mole ratios (n(P):n(Mo)=1:1,2:1,3:1) in impregnation liquid and reduction temperature (500,550,600 ℃) on the formation of MoP phase. Its catalytic performance in the selective oxidation of benzyl alcohol to benzaldehyde was further investigated. It was found that the prepared MoP/SiO2 catalyst with P/Mo mole ratio of 2 and the reduction temperature of 550 ℃ (MoP/SiO2-550-2) had the highest conversion （99.7%）and selectivity（99.8%）in the selective oxidation of benzyl alcohol to benzaldehyde, which is attributed to the formation of more and small MoP phases on the MoP/SiO2-550-2 catalyst.

Abstract:HPW@HKUST-1 from phosphotungstic acid (HPW) supported in HKUST-1 was prepared with one-pot synthesis. It had excellent catalytic performance in the etherification of isobutene and ethylene glycol to ethylene glycol monotert butyl ether (EGME). The structure of catalysts was analyzed by XRD, SEM, EDX, BET and ICP, and the acidity of catalysts was determined by pyridine infrared (Py-IR) and acid-base titration. The results showed that enhanced HPW loading amount increases the Br?nsted acid site of the catalyst, which was beneficial to improve the reactant conversion. Meanwhile, there was a negative correlation between HPW loading amount and the pore size of the catalyst, and the decrease of pore size was conducive to improve the EGME selectivity. The HPW@HKUST-1 catalyst loaded with 10% phosphotungstic acid (Molar fraction based on the amount of substance in HKUST-1) has better activity and good recyclability. The optimum reaction conditions were investigated and determined as follows: reaction temperature was 100 ℃, the molar ratio of isobutene to ethylene glycol (n(IB):n(EG) )was 6:1, and catalyst dosage was 10% of the mass of ethylene glycol. The ethylene glycol conversion in optimal conditions reached 97% and EGME selectivity was 85% respectively.

Abstract:A one step method was employed to synthesize D-biotin I from dibenzyl biotin Ⅱ in order to solve the problems of high energy consumption, pollution and toxicity caused by the two-step reaction of debenzyl hydrobromate and ring closure. Optimal reaction conditions were identified via optimization solid Lewis acid type and solvent type, molar ratio of Lewis acid to dibenzyl biotin Ⅱ, reaction temperature and reaction time, followed by product structural characterization by FTIR, NMR, HPLC and LC-MS. The results showed that the product yield was higher than 90% and HPLC purity reached 99% when using aluminum chloride, aluminum bromide, zinc chloride and zinc bromide as Lewis acid, trifluoromethyl as solvent, and n(Lewis acid):n(dibenzyl biotin Ⅱ) kept at 2:1, reaction temperature at 70~75 ℃ and reaction time for 2 h.

Abstract:To solve the problem of low solubility and poor transdermal performance of quercetin, Polyol-in-oil-in-water(P/O/W) double Pickering emulsions were prepared to encapsulate quercetin with hydrophobic silica AEROSIL?R202 and hydrophilic silica AEROSIL?200 as emulsifiers, dipropylene glycol and glycerol as polyol phases. The effects of mass fraction of internal polyol phase (dipropylene glycol and glycerol), mass fraction of hydrophobic silica AEROSIL?R202, water-to-primary emulsion ratio, and mass fraction of hydrophilic silica AEROSIL?200 on the P/O/W double Pickering emulsion were investigated, and the best preparation conditions were: mass fraction of internal alcohol phase〔m(glycerol):m(dipropylene glycol)=6:4〕was 20%, mass fraction of hydrophobic silica was 3%, water-to-emulsion ratio m（water）：m（primary emulsion）=5：5, and mass fraction of hydrophilic silica was 2%. Confocal laser scanning microscope (CLSM) observation proved that the P/O/W double Pickering emulsions were successfully prepared. X-ray diffraction (XRD) results showed that the crystalline peak of quercetin disappeared after being encapsulated by the double emulsions, indicating that the double emulsions had a good encapsulation effect on quercetin. The drug loading efficiency of the P/O/W double emulsion loaded with quercetin determined by centrifugation reached (0.45 ± 0.02) %. The in vitro transdermal experiment and pigskin CLSM showed that the transdermal performance of quercetin after the double emulsion encapsulation improved, this is mainly due to the fact that the solubility of quercetin in the internal alcohol phase〔m (glycerol):m (dipropylene glycol) = 6:4〕can reach 60±2.1 mg/g, which is much greater than that in water (<0.5 μg/g/g). g) or solubility in oil (<1 mg/g).

Abstract:Nano micelles are good carriers for anticancer drug - doxorubicin (DOX). It has received great attention in the application of controlled release of hydrophobic drug. In this study, we used three times of Activators Regenerated by Electron Transfer Atom Transfer Radical Polymerization (ARGET ATRP) to prepare a thermally responsive amphiphilic triblock polymer: poly (perfluoroacyl fluoride polyether hydroxyethyl methacrylate9)-b-poly(dimethyl methacrylate) Acrylamide)-b-poly(polyethylene glycol methacrylate360) (P(PFPHM9-b-DMAA-b-PEGMA360)). The self-assembly ability, lower critical solution temperature (LCST), biological toxicity, DOX encapsulation rate, simulated human temperature (37 ℃) and cancerous tissue temperature (42 ℃) were investigated to test the drug release ability of nano micelles. The results showed that the critical micelle concentration of P(PFPHM9-b-DMAA-b-PEGMA360) was 1.0 μg/L。, the drug loading capacity of P(PFPHM9-b-DMAA-b-PEGMA360) micelles was 20.6 %, the encapsulation rate was 86.7 %, LCST was 39 ℃, and the drug release rate was 95.9 % and 33.5 % at 42 ℃ and 37 ℃, respectively. These results indicate that P(PFPHM9-b-DMAA-b-PEGMA360) is temperature sensitive and has great potential as a drug carrier for DOX.

Abstract:Ultrathin graphitic phase carbon nitride (g-C3N4) was prepared by a simple thermal polymerization method using melamine as the precursor. The two-dimensional bismuth iodide/graphite phase carbon nitride (2D/BiOI/g-C3N4, BICN-x) Z-type heterojunction with different BiOI mass ratios were compounded and constructed by in situ deposition-precipitation method to generate bismuth iodide (BiOI) on the surface of g-C3N4 for synergistic persulfacte (PS). The structure, surface functional groups, morphological characteristics, specific surface area and optical properties of the photocatalysts were characterized by XRD, FTIR, SEM, HRTEM, BET and UV-vis DRS. The results showed that the photogenerated electron-hole pair separation efficiency was higher when the mass ratio of BiOI to g-C3N4 was 2:1 (BICN-3) through close interfacial coupling, the photogenerated e- reached the surface of the structure with a faster migration rate, and the catalytic system formed by BICN-3 and PS (BICN-3/PS) removed 88.2% of tetracycline (TC, 10 mg/L), with a degradation rate 3.82 times higher than that of BICN-3 alone.

Abstract:Using glycerol and fatty acid with different structures (octoic acid, 2-ethylhexic acid, pentic acid and 2-methylbutyric acid) as raw materials, four glyceride-derived fatty acid esters with different structures were prepared by direct esterification method, and were applied as plasticizers for PVC. The structure and purity of the plasticizers were analyzed by FTIR and 1HNMR. The PVC films plasticized by the four plasticizers were studied and compared with the PVC film plasticized by bis(2-ethylhexyl) phthalate (DEHP). The results showed that, compared with the PVC film plasticized by DEHP, the percentage of breaking elongation of glycerol trivalerate was increased by 151% in the plastic PVC film, the initial degradation temperature of the glycerin tricaprylate plasticized PVC film was 12.3 ℃ higher, the extraction resistance of glyceryl tri(2-methylbutyl) ester plasticized PVC film was better, indicating the potential to replace DEHP. Furthermore, the analysis of the relationship between the structure and performance of the plasticizers found that the PVC plasticized by plasticizers with more branches had better compatibility and extraction resistance, but the thermal stability and volatility resistance were weaker.

Abstract:In order to improve the poor temperature and salt resistance of Polyacrylamide in the field of crude oil tertiary recovery, a soap free emulsion polymerization method without using a helper solvent was developed. Trace (0.05 mol%) capsaicin derived monomer N-[3- (acryl amino methyl) -2- hydroxyl -4,5- two methyl benzyl] acrylamide (HMMAM) was used as functional monomer. New hydrophobically associating polymers PACSAM and PACIAM were synthesized by copolymerization with octadecyl methacrylate (SMA) and isobornyl methacrylate (IBOMA) to improve the tolerance of polyacrylamide. The structure and morphology were characterized by FTIR, 1HNMR, TGA and SEM; The hydrophobic association characteristics, temperature and salt resistance, solubility and corrosion inhibition of the polymer were discussed. The results showed that PACIAM and PACSAM had stable three-dimensional network structure, and the critical Association concentrations were 4.5 × 10-3 g/mL and 4 × 10-3 g/mL respectively. The introduction of trace capsaicin derived monomer increased the apparent viscosity of 0.01 g/mL polymer solution to 776 mPa·s and 1224 mPa·s at 30 ℃, the viscosity retention rates at 90 ℃ were 37.57% and 41.44%, and the viscosity retention rates in 0.01 g/mL NaCl solution were 37.57% and 42.12%, The corrosion inhibition efficiency of 4 × 10-3 g/mL polymer solution can reach 96.76% and 97.28%, indicating that the introduction of trace HMMAM greatly increases the properties of the polymer.

Abstract:A novel salt-resistant hydrophobic polymer HLMY was synthesized from acrylamide (AM), octadecyldimethylpropyl ammonium chloride (ODAAC) and Salt-resistant Nonionic functional Iso-decane polyoxyethylene ether acrylate (ECY) by aqueous solution polymerization. The self-assembly association performance of HLMY in aqueous solution and the effects of salt and temperature on its association behavior were studied by viscosity, fluorescence, scanning electron microscopy (SEM) and rheological tests. The results showed that the critical association concentration of HLMY was about 0.30%~0.35%. The addition of salt enhanced the quasi-spatial network structure, and HLMY molecules clustered more closely in NaCl solution than in CaCl2 solution. When the shear time of 0.6%HLMY solution (5%NaCl solution as solvent) is less than 500 s at 90, 120 and 180℃, 170 s-1, the viscosity increases with the increase of temperature, indicating that HLMY has excellent salt thickening ability in NaCl. When the shear time continues for 2500 s, The viscosity is still greater than 50 mPa·s.. The elastic modulus(G') increases with the increase of HLMY mass fraction, the elasticity of the system increases, and the number of hydrophobic structural units increases, forming a dense quasi-spatial network structure.

Abstract:We have established an effective and general catalyst-free strategy for accessing dibenzo[b,f][1,4]oxazepine derivatives and the yield of the products obtained were good to excellent (up to 90%). The process involves a catalyst-free decarboxylative addition reaction of β-keto acids and cyclic imines.

Abstract:Benzimidazo[2,1-a]isoquinolin-6(5H)-one moieties are one of the most important compounds exten-sively existed in many pharmaceutically active compounds and functional materials. It is of great scientific significance to develop a new efficient and green method for the synthesis of benzimidazo[2,1-a]isoquinolin-6(5H)-ones. In this paper, a visible-light promoted fluoresce-in-catalyzed oxidative coupling of N-methacryloyl-2-phenylbenzoimidazole with dioxolane has been successfully developed, which underwent radical addition/ cyclization to construct benzimid-azo[2,1-a]isoquinolin-6(5H)-one derivatives. Under the optimized reaction conditions, eleven ben-zimidazo[2,1-a]isoquinolin-6(5H)-ones were obtained in 48%-78% yields. Their structures were de-termined by 1HNMR and 13CNMR. This protocal has the advantages of mild condition, green and simplicity.

Abstract:In this paper, the cheap and easily available 1, 8-dihydroxyanthraquinone and 1, 4-dihydroxyanthraquinone were used as starting materials, and different routes were designed to prepare the key intermediate product 1, 8, 13, 16-tetrahydroxytriptycene. and 1, 4, 5, 8-tetrahydroxytriptycene, and then esterified with trifluoromethanesulfonic anhydride to obtain 1, 8, 13, 16-tetra[(trifluoromethanesulfonyl)oxy]triptycene and 1, 4, 13, 16-tetra[(trifluoromethanesulfonyl)oxy]triptycene,the yields were 46.2% and 70.5%, respectively. The structure of the products were characterized by ESI-HMS and NMR (1H NMR, 19F NMR). The synthesis method is simple, efficient, and the intermediate products are stable, which can provide a reference for the industrialized production of the aryl trifluoromethanesulfonate with triptycene as the skeleton.