Abstract:The bromination oxyalkylation of isocoumarin derivatives at 4, 3-position with N-Bromosuccinimide(NBS) or N-chlorosuccinimide(NCS) as bromination reagent or chlorinated reagents, methanol as solvent and raw materials was realized. The addition reaction between 3,4 - sites can take place at room temperature to synthesize isochromanone compounds with potential pharmacological activity. After optimizing the reaction conditions, the results showed that When n(Halogenated agents) : n(Ⅲa)= 2:1, and the alcohol compound was 2 mL, the high yield isocouman-1-ketone derivatives (80%~90%) could be obtained at room temperature (25 ℃) for 7 h.the high yield of isocoumarin 1-ketone derivatives (80%~90%) could be obtained. The structures of the products were determined by 1 HNMR, 13CNMR and HRMS.

Abstract:The laser direct structuring (LDS) series materials based on polyamide 6 (PA 6) and polyphenylene sulfide (PPS), including LDS-PA 6, LDS-PPS, LDS-PA 6/PPS, and the long glass fiber (LGF) reinforced LDS material LDS-PA 6/PPS/LGF were prepared. The thermal and mechanical performances of were characterized by TGA, heat deflection temperature (HDT) and mechanical tests. The morphologies of regions after laser activation and layers after selective plating, and the reliability of plating layer were also evaluated by optical microscope, SEM, crosscut tape and salt spray tests. The results revealed that the thermal performances, water absorption resistance, flexural strength and modulus of LDS-PA 6/PPS were between those of LDS-PPS and LDS-PA 6. The initial thermal decomposition temperature of LDS-PA 6/PPS was increased by 20℃ by LGF, while HDT and flexural modulus were improved by 62% and 102% relative to the latter, respectively. It was found that increasing the laser power and repetition, as well as decreasing the scanning speed and hatch distance, have enhanced the superposition of laser pulse and effectively coarsened the surface of materials. These factors eventually contributed to the adhesion and deposition of copper particles during the subsequent selective plating process. The optimum laser parameters were laser power of 10 W, repetition of 70 kHz, scanning speed of 2500 mm / s and hatch distance of 25 µm. The plated copper particles distributed uniformly and the particle size was about 40 µm. The plating layer displayed a smooth surface and s strong adhesion with the substrate. And the electric resistance of the layer was less than 1.0 Ω, expressing an excellent electric conductivity.

Abstract:As the membrane material, polyether imide (PEI) was used to prepare PEI flat ultrafiltration membrane by phase inversion method. In order to improve the structure and performance of ultrafiltration membrane, HKUST-1 mixed matrix membrane doped with polyetherimide was prepared by adding metal-organic framework HKUST-1 into the casting solution. The structure, morphology and surface wettability of the prepared film were characterized by FTIR, SEM, AFM and water contact angle tester respectively. It is found that the mixed matrix membrane doped with 0.05% HKUST-1 nanomaterial has good performance. Under the operating pressure of 0.1 MPa, the pure water flux can reach 1304 L/(m2·h), and the rejection rate of 1.0 g/L bovine serum albumin (BSA) is over 97%. After soaking in acidic (pH =2) and alkaline (pH =12) solutions for 24 hours, the rejection rate of BSA only decreased by about 2% (the pure water flux remained basically unchanged), which showed good acid and alkali resistance. At the high temperature of 80℃, the pure water permeation flux of the membrane reached 1587 L/(m2·h) and the BSA rejection rate was still higher than 95%, which showed strong high temperature resistance. Finally, the antifouling performance test showed that its flux recovery rate (FRR) reached 92%, proving that the antifouling performance of the membrane was greatly improved.

Abstract:Fresh ginkgo leaves were used as carbon source to synthesize carbon dots (CDs) by hydrothermal method with good water solubility and high stability. The structure and optical properties of CDs was characterized by TEM, XRD, FTIR, UV-Vis and fluorescence spectra. It was found that rutin could reduce the fluorescence intensity of CDs. Based on the quenching phenomenon, a fluorescence probe with high selectivity and sensitivity was obtained. The results showed that the quenching degree of CDs fluorescence presented a good linear relationship with rutin concentration in the range from 10 to 80 μmol/L. The equation was ln(F/F0)= -0.0175c(μmol/L)-0.01492, and the correlation coefficient R was 0.9997. The detection limit is 1.5μmol/L. Moreover, citric acid CDs was synthesized using citric acid as carbon source. These two fluorescent probes were applied to the determination of Rutin in sophora flower bud, and a close result is obtained.

Abstract:Amphiphilic block copolymers were synthesized by RAFT polymerization using S, S-dibenzyltrithiocarbonate ( DBTTC ) as chain transfer agent, acrylamide ( AM ) as the first monomer and vinyltriethoxysilane ( VTES ) as the second monomer. The aqueous solution can be used as an aerosol fixer for the removal of radioactive aerosols in nuclear-related environments. The molecular structure and properties of the polymer were characterized by FTIR, 1H NMR, DSC and GPC. The results of viscosity characterization showed that with the decrease of and viscosity of the polymer increased with the decrease of the amount of chain transfer agent. The test results of surface tension and contact angle showed that with the introduction of VTES, the surface tension decreased to 40.44 mN / m ; the contact angle was reduced to 11.9°; the aerosol settling fixation experiment showed that the settling fixation efficiency of PTI-A2 dust was 91.04 %. It is expected to be applied as radioactive aerosol settling fixative in nuclear-related environment.

Abstract:A green process of synthesizing polyimide from phthalic anhydride and 4,4'-diaminodiphenyl ether monomer was studied. First, polyamic acid was formed between PMDA and ODA in N,N-dimethylformamide DMF solvent. And then, imidization of the polyamic acid was realized synergistically with urea-choline chloride deep eutectic solvent（DES）as both catalyst and solvent, and acetic anhydride as dehydrator. The obtaining high molecular weight product PI could be isolated by a simple and direct filtration. The products were characterized by FT-IR, TGA-DSC, and element analysis, respectively. Also, the effect of reaction temperature, reaction time, DES catalyst dosage and acetic anhydride adding amount on the imidization of PAA was investigated, respectively. Experimental results indicate that under the conditions of 80 ℃, volume ratio of DES to acetic anhydride1：2, molar ratio of PAA to DES 1：2, PI product yield and imidization degree reached an optimal value. the thermogravimetric curve of the prepared sample is close to that of polyimide reported in the literatures, and its infrared absorption spectrum is consistent with specific absorption peak of imide bond reported in the literature. In addition, the DES and DMF showed good reusability. The process is green and do not use such harmful imidization catalyst as pyridine, imidazole and isoquinoline etc.

Abstract:The expanded graphite (EG) prepared by electrochemical oxidation method was used as the carbon framework. The PANI/EG interlaminar composites, with tower-like porous polyaniline (PANI) coated on the surface of graphite layers orderly, were constructed via a vacuum-assisted intercalation in-situ oxidation polymerization method. The PANI/EG composites were characterized by SEM, TEM, XRD, FTIR, Raman, XPS and BET. The electrochemical detection of Cd2 were tested by SWASV, and the electrochemical properties were examined using CV and EIS. The results showed that the PANI/EG composites exhibited layered hierarchical structure. The PANI/EG12 modified electrode with EG content of 12% was employed for Cd2 electrochemical detection. The sensitivity was 7.814 μA/μM, the limit of detection was 3.24 nM and the linear range was 0.25~6 μM. The sensor has good repeatability and anti-interference.

Abstract:Based on free radical polymerization, a series of temperature and salt resistance amphiphilic polymers viscosity reducer were synthesized by using haloalkanes, polyethyleneimine(PEI), acrylamide(AM), 2-acrylanmido-2-methylpropanesulfonic acid(AMPS). By infrared spectrum(IR), microscope, Rotary interface tensioner, haake rheometer and sand pack experiment, the viscosity reduce property and flooding performance of polymers on Chunfeng heavy oil were studied. Experimental results showed that when the polymer mass fraction is 1.00% and the oil-water mass ratio is 7:3, the heavy oil with viscosity of 4753 mPa?s in Chunfeng oilfield can be reduced to 85 mPa?s, and the viscosity reduction rate can reach more than 98%; meanwhile, the oil-water interfacial tension is reduced from 11.59 m/Nm to 0.06 m/Nm. The polymer has good temperature and salt resistance. After aging at 110℃ for 24 hours, the mineralization degreesalinity is 1.45?105 mg/L, and the viscosity reduction rate was more than 93%. At 50℃, 4.84?104 mg/L, the viscosity of polymer with mass fraction of 0.50% is 56 mPa?s, which is compared to the viscosity of the commercial partially hydrolyzed polyacrylamide solution 32 mPa?s. The polymer viscosity reducer has better aqueous thickening capabilities under mineralization conditions. The results of the flooding experiment show that the viscosity reducer flooding can increase the oil recovery by 37.45% on the basis of water flooding. The results show that the polymer solution can improve the recovery by reducing the heavy oil viscosity and expanding the sweep volume.

Abstract:Abstract: In this paper, CdS/RGO/MoS2 composites were prepared by simple hydrothermal method. They were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), UV-visible diffuse reflectance spectroscopy (UV-VIS DRS), electrochemical impedance (EIS) and transient photocurrent response. The results showed that CdS/0.75 wt % RGO/ 1.0 wt % MoS2 composite had significant photocatalytic degradation activity and stability for methyl orange (MO) under visible light irradiation. The photodegradation rate (0.05777 min-1) was 2.5 times than that of CdS (0.023 min-1), 19.3 times than that of MoS2 (0.003 min-1), 2 times than that of CdS/0.75 wt% RGO (0.02821 min-1) and 2.16 times than that of CdS/1.0 wt% MoS2 (0.02677 min-1)，respectively. After 5 cycles, the degradation effect did not change significantly, which proved that the catalytic system had good stability. The increase in photocatalyst activity was mainly due to the formation of composite materials, enhancing the separation and migration of carriers. These materials had excellent photocatalytic performance and good stability for the photodegradation of MO under visible light irradiation, thus had a wide range of application prospects and theoretical significance.

Abstract:Cleaning agent plays an important role in industrial production and daily life. As a novel green surfactant, alkyl glycoside (APG) has the advantages of high surface activity, strong decontamination, low ecotoxicity and complete biodegradability. It is an ideal surfactant for cleaning agent. However, the poor water solubility and hard water resistance of long alkyl chain APG limit its extensive application. The hydroxyl groups on APG sugar ring can be connected with a variety of groups to form derivatives with better performance. The derivatives not only overcome the shortcomings of glycosides, but also increase more functions and have broad application prospects. This paper introduces the decontamination mechanism of cleaning agent and the progress of synthesis of APG; The classification, synthesis and important applications of APG derivatives in cleaning agents were reviewed in detail; The future development direction of APG and its derivatives in the field of cleaning is also prospected.

Abstract:Using γ-Al2O3 as carrier, Mn-Ce/γ-Al2O3 was prepared by ultrasonic impregnation method, and it was used as catalyst to treat high-concentration and high-salt chlorpyrifos wastewater by catalytic wet air oxidation. The catalytic materials were characterized by FTIR, XRD, SEM. By single factor experiment, this paper discusses the reaction temperature, pH, catalyst dosage, the dosage of oxidant on the influence law of COD removal. The uniform design method was used to optimize the experimental conditions of catalytic wet air oxidation, when the influent COD concentration is 13550 mg/L, the optimal conditions of wet catalytic oxidation are as follows: reaction temperature is 230 oC, reaction time is 2 h, influent pH is 7, dosage of 30% hydrogen peroxide is 5.5 mL, dosage of Mn-Ce/γ-Al2O3 catalyst is 0.4 g, under this condition, COD removal rate reaches 90.63%; the primary and secondary order of various factors affecting the experimental results is reaction temperature > amount of catalyst > amount of oxidant > time. The density functional theory method is used to calculate the quantum chemical parameters of chlorpyrifos molecule, combined with free radical capture experiment and the results of the UV spectrum, the possible mechanism of catalytic wet air oxidation degradation of chlorpyrifos was preliminarily discussed. the results show that, MnO2 and CeO2 active components are loaded on γ-Al2O3, Mn-Ce/γ-Al2O3 can better promote H2O2 to produce •OH, and The kinetic experiments show that the degradation process of COD by catalystic wet air oxidation is in line with the quasi-second-order kinetic equation.

Abstract:Using oleic acid and hydroxy ethyl ethylene diamine as raw materials, an imidazoline intermediate is generated through amidation and cyclization reactions, and then ethylene oxide is added to polymerize to obtain an ethoxylated imidazoline rust inhibitor. The corrosion inhibition performance of this rust inhibitor on Q235 carbon steel in 3.5% NaCl saturated Ca(OH) 2 was evaluated by weight loss method, salt water immersion method, salt water immersion drying experiment, electrochemical comprehensive experiment and scanning electron microscope, and through the cement paste fluidity experiment, tested the influence of the rust inhibitor on the concrete fluidity.The research results show that the rust inhibitor can effectively protect Q235 carbon steel from corrosion in 3.5% NaCl saturated Ca(OH)2 corrosive medium. Through electrochemical experiments, it proves that the rust inhibitor is a mixed type rust inhibitor that mainly inhabits the anode reaction. When the mass concentration is 4%, the corrosion inhibition efficiency of the steel bar reaches 99.13%, and the scanning electron microscope shows that the surface of the carbon steel is smooth and flat. The experimental results of cement paste fluidity show that the rust inhibitor has no obvious adverse effect on the fluidity of concrete.

Abstract:In order to develop environment-friendly lubricant additives, ricinoleic acid and diethanolamine were used as raw materials to prepare ricinoleic acid diethanolamide (RA) by two-step synthesis method, and then ricinoleic acid diethanolamide borate (RAB) was synthesized with boric acid. The structures of RA and RAB were characterized by FTIR, and the tribological properties of RAB were investigated by using rapeseed oil as base oil. The optimal conditions for the synthesis of RA were obtained by single factor experiment: the molar ratio of ricinoleic acid to diethanolamine in the acylation reaction was 1.0:0.8, and the reaction time was 6 h at 150 ℃. The molar ratio of ricinoleic acid to diethanolamine was 1.0:0.4, the amount of sodium hydroxide was 1% of the total mass of ricinoleic acid and diethanolamine, and the yield of RA reached 88.10% at 95 ℃ for 3 h. The optimum synthesis conditions of RAB were as follows: the molar ratio of RA to boric acid was 1.8:1.0, the amount of p-toluenesulfonic acid was 1.5% of the total mass of RA and boric acid, and the yield of RAB reached 92.78% at 140 ℃ for 100 min. The rapeseed oil added with RAB formed a composite lubricating protective film containing B and N on the friction surface. When the amount of RAB was 2% of the total mass of rapeseed oil, the maximum non-seizure load (PB) of the oil sample increased by 61% compared with that of rapeseed oil. When RAB content was 1%, the oil sample showed good friction protection performance.

Abstract:3,4-Dichloroaniline (3,4-DCA) is a main intermediate of many fine chemical products, it is easy to remain in production wastewater, which is highly toxic and difficult to biodegrade. In this experiment, Gram-negative bacteria were isolated from dye wastewater, which could grow with 3,4-DCA as the sole carbon source and energy source. Two strains with great morphological differences, P11-1 and L13, were screened to construct mixed bacteria, which were used in the transformation test of 3,4-DCA. By optimizing the proportion of the mixed bacteria, the transformation rate reached 73.33%, which was significantly higher than that of single bacteria. The two strains were identified as Pseudomonas aeruginosa by observing the morphology of the strains and determining the 16S rDNA sequence. Through the single factor test to investigate the transformation ability of the mixed bacteria to 100 mg/L DCA in 3 days, and further optimizing the transformation conditions by orthogonal experiments, it is concluded that the best combination of the conditions for the transformation of the mixed bacteria is as follows: inoculums concentration 3% (volume fraction), 30 ℃, pH 8.0, shaking velocity 190 r/min. Under these conditions, the transformation rate is up to 89.26%, in which the pH value has the greatest effect on the transformation ability of the mixed bacteria. GC-MS analysis showed that the main metabolite of the mixed bacteria was 3,4-dichloroacetanilide. Enzyme activity analysis showed that the mixed bacteria had higher N-acetyltransferase (NAT) activity, that is, it detoxified 3,4-DCA by acetylation.

Abstract:pH responsive maleylated lignin-g-polyvinylpyrrolidone (MEHL-g-PVP) nanoparticles with a diameter of about 50 nm were synthesized by free radical polymerization and self-assembly using enzymatic lignin (EHL) and N-vinylpyrrolidone (NVP) as raw materials. The effects of chemical modification, polymer concentration, water addition rate, stirring speed, initial water content and drug dosage on the morphology, size and drug-carrying properties of nanoparticles were investigated. The results showed that the maximum drug loading of nanoparticles could reach 35.1% and the encapsulation efficiency was 64.3%. In vitro drug release showed that MEHL-g-PVP had obvious pH response ability, and the release amount of ibuprofen (IBU) was 11.1% and 63.75% in 72h in simulated intestinal environment and gastric juice of human body, respectively. The results of in vitro cytotoxicity test showed that MEHL-g-PVP drug-loaded nanoparticles had no cytotoxicity to normal cells and had a good inhibitory effect on colon cancer cells. MEHL-g-PVP nanoparticles are expected to become an ideal carrier material for oral drugs.

Abstract:In order to meet the demand for ecological flame retardancy of silk fabric, adenosine phosphate (AMP) was introduced into silk fabric with the catalysts of 1 - (3-dimethylaminopropyl) - 3-Ethyl carbodiimide (EDC) and N-hydroxysuccinimide (NHS). The chemical structure, surface morphology and element content of the silk fabric before and after modification were characterized by FTIR, SEM and EDS. The flame retardancy and thermal stability were characterized by limit oxygen index tester, vertical flammability tester, cone calorimeter and thermogravimetric analyzer. The tensile breaking properties, fabric style and other physical and mechanical properties of the silk fabric before and after modification were tested. The results showed that there were obvious particle-like coverings on the surface of modified silk fabric, and phosphorus elements were evenly distributed. When the weight gain of modified silk fabric reached 13.3%, the limit oxygen index value reached 30.10%. Compared with the original silk fabric, the weight loss, heat release rate and damage length were decreased by 13.1%, 30.6% and 11.1 cm, respectively. After 50 times of washing, the limit oxygen index of modified silk fabric value reached higher than 25%, indicating that the modified silk fabric had a relatively good washing resistance.

Abstract:Iron-carbon composites(Fe/C pH2、Fe/C pH4、Fe/C pH6、Fe/C pH8、Fe/C pH10) were synthesized by hydrothermal-carbonization method using sucrose and anhydrous ferric chloride as raw materials and adjusting the pH of solution with ammonia. Fe/C pH10 was further prepared iorn-carbon composite material(Fe/C pH10-Q) with a particle size in the range of 100~1000 nm by ball milling method. The adsorption and degradation properties of product for trichloroethylene (TCE) were investigated. The morphology and composition of the products prepared at different pH were characterized by SEM, XRD, TG, N2 adsorption-desorption. Gas chromatography (GC) and ion chromatography (IC) were used for quantitative determination of TCE and degradation products (ethane, ethylene and chloride ions). The results showed that nano-zero-valent iron (nZVI) co-existed with biochar in iron-carbon composites, nZVI was randomly dispersed over carbon spheres or particles, agglomeration don’t occurred. The content and particle size of nZVI in the product increased to 36.35%、60 nm of Fe/C pH10 from 6.52%、20 nm of Fe/C pH2 as solution pH increased. The specific surface area of the product decreased to 302 m2/g of Fe/C pH10 from 369 m2/g of Fe/C pH2. The degradation rate of TCE by Fe/C composites was in the order of Fe/C pH10＞Fe/C pH8＞Fe/C pH6＞Fe/C pH4＞Fe/C pH2. The removal rate of TCE was closed to 100% by Fe/C pH10 when reaction time was 48 h. The particle size, content and reactivity of nZVI in Fe/C composites were not changed by ball milling. The transport performance of Fe/C pH10-Q was evaluated by quartz sand column, results showed that Fe/C pH10-Q had satisfactorilly underground transmission performance. Liquidity of Fe/C pH10-Q significantly increased by compared with commercial nZVI and Fe/C pH10

Abstract:Selenizing DMY was prepared with DMY as substrate and Na2SeO3 as selenizing agent. UV, FTIR, NMR, XRD, TG and atomic fluorescence spectrometer were used to characterize its structure and performance. CCK-8 method was used to detect the effect on HSC-3 cell proliferation, and the scratch experiment was used to study the effect on HSC-3 cell migration. The results showed that the basic nucleus of flavonoids still existed in selenizing DMY and the C-Se bond was newly formed, and the selenium content was 6.54%±0.22%. Both DMY and selenizing DMY have a good inhibitory effect on the proliferation and migration of HSC-3 cells, and the inhibitory effect is positively correlated with the concentration. The half inhibitory concentration (IC50) of DMY and selenizing DMY on HSC-3 cells were 25.27 μg/mL and 21.27 μg/mL, respectively. The selenization of DMY effectively improves the ability of inhibiting the proliferation and migration of HSC-3 cells.

Abstract:Vinyl-terminated fluoropolysiloxane (FSI) was prepared with 1,3,5-trimethyl-1,3,5 (trifluoroethyl) cyclotrisiloxane (D3F), octamethylcyclotetrasiloxane (D4) and tetramethyltetravinyl cyclotetrasiloxane (D4vi) as functional monomers using alkali glue as the catalysis. The plastic grade polypropylene (PP), perfluorohexylethylene (TE-6), trimethylolpropane triacrylate (TMPTA), and maleic anhydride grafted PP (MAH-g-PP) were used as matrix resin, secondary hydrophobic modifier, crosslinking agent, and compatibilizer respectively. As a result, interpenetrating network FSI/PP composite hydrophobic material was formed by high temperature melt polymerization. The structure of the composites was characterized by FTIR. The comprehensive properties and surface morphology of the composites were analyzed by tensile testing machine, contact angle measuring instrument, SEM, AFM, and TG-DSC. The results showed that when the amount of D4Vi end capping agent was 0.05wt% of the total FSI, the usage of MAH-g-PP was 6wt% of the total FSI/PP, and the addition of TMPTA was 3wt% of the total FSI/PP, the hydrophobic angle of FSI/PP reached 138.3o and the oil hydrophobic angle reached 46.1o, which was 55.56% and 157.54% higher than that of pure PP respectively.

Abstract:Polyethyleneimine-modified magnetic bentonite (PEI/KH560/MBent) was prepared by grafting polyethyleneimine (PEI) on the surface of magnetic bentonite (MBent) and characterized by FTIR, VSM, XRD, TGA, EA, SEM and EDS. The adsorption performance of PEI/KH560/MBent for Pb_²⁺ and Cu_²⁺ in aqueous solution was studied. The results showed that polyethyleneimine was successfully grafted onto the surface of magnetic bentonite and effectively increased the adsorption capacity for Pb_^2??+ and Cu_²⁺. The initial pH of solution had a great influence on the adsorption capacity. When the pH increased, the adsorption capacity increased. Under the conditions of pH=5 and the initial concentration of the solution of 300 mg/L, the actual adsorption capacities of PEI/KH560/MBent for Pb_{^{2 ??+}} and Cu_²⁺ were 96.21 and 61.08 mg/g, respectively. The adsorption process was more in line with the quasi-second-order kinetic model, and the adsorption behavior was more consistent with the Langmuir adsorption isotherm model. The results of thermodynamic studies indicated that the adsorption was a spontaneous endothermic process. After 5 cycles of recycling, the adsorption capacity remained above 60% of the original, indicating that PEI/KH560/MBent had certain reusability.

Abstract:Organic coatings, which isolate metal from corrosive environment through physical shielding, have become the main anti-corrosion measures because of their economic, effective and convenient operation. However, environmental factors often inevitably lead to cracks in the coating and eventually lead to the failure of coating. After the coating with self-repair ability is damaged, it has attracted extensive attention because of its ability to actively repair the damaged part of the coating. Compared with the coating with single physical shielding performance, the coating with self-healing performance can reduce the human and material cost during the maintenance of damaged coating, and has great potential in future development. Based on the healing mechanism and development history of self-healing coatings, this paper divides self-healing coatings into self-healing type, non-self-healing type with the help of external stimulation and intelligent self-healing coating that can respond to specific environment. And expounds its research status, advantages and disadvantages.

Abstract:In order to discover highly effective insecticide, a meta-dicaramide compound N-[2-bromo-4-(perfluoropropane-2-yl)-6-(trifluoromethyl)phenyl]-3-[N-(cyanomethyl)benzoylamino]-2-fluorobenzamide(NC-1) was designed and synthesized by using the strategy of active pharmacophore fusion with methyl 2-fluoro-3-aminobenzoate and 2-trifluoromethylaniline as starting materials. The structure of compound NC-1 was confirmed by 1H NMR, 13C NMR and HRMS. The preliminary bioassay results in greenhouse showed that compound NC-1 exhibited excellent insecticidal activity, the mortality of compound NC-1 against Plutellaxylostella was 96.67 % at 0.05 mg/L and 93.33 % against Chilosuppressalis at 0.625 mg/L. Compound NC-1 can be used as a lead compound or a candidate insecticide for further research and development.

Abstract:Palladium-copper nanoparticles which average particle size less than 10 nm were deposited on alumina balls by supercritical fluid deposition (SCFD) method. using alumina balls as carrier and palladium acetylacetonate and copper acetylacetonate as precursors. High-angle annular dark field-scanning transmission election microscope (HAADF-STEM), X-ray diffraction (XRD) and weighing methods were used to characterize the loading status and particle size distribution of palladium-copper nanoparticles. The results showed that the deposition temperature and the deposition pressure had important effects on the particle size of palladium-copper nanoparticles. The average particle size of palladium-copper nanoparticles could reach 2.37 nm at 65 ℃ and 15 MPa. For a fixed amount of metal precursor, the deposition time had an optimal value. The selection of co-solvent affects the particle size distribution and the average particle size of palladium-copper nanoparticles. At 65 ℃ and 15 MPa, when 8 mL of dichloromethane was used as a co-solvent, the average particle size of the palladium-copper nanoparticles was reduced to 1.81 nm. With the increase of Pd theoretical loading, the average particle size of palladium-copper nanoparticles decreased first and then increased. When Pd theoretical loading was 0.50%, the average particle size reached the minimum value 1.81 nm.

Abstract:Boron nitride (BN) doped magnetic hydroxyapatite (MP) composites (MPBN) were prepared by co-precipitation method. The morphology, pore size, specific surface area, elemental composition, crystalline shape, surface functional groups and magnetic properties of MPBN were characterised by SEM, BET, FTIR, XRD, XPS and VSM, and the adsorption properties of MPBN on Pb(II) were investigated by single-factor adsorption experiments. The results showed that MP was successfully loaded in the lamellar structure of BN and MPBN was superparamagnetic. The adsorption amount reached 460.75 mg/g when the Pb(II) concentration was 250 mg/L, the temperature was 25 ℃, pH=6.0 and the MPBN was injected at 0.4 g/L. The adsorption process was in accordance with the Pseudo second-order kinetic model and the Langmuir isothermal model, indicating that the adsorption process of MPBN on Pb(II) was mainly attributed to the chemisorption of single molecular layer. ?H=94.76 kJ/mol and ?S=339.61 J/molK for the adsorption process were obtained by fitting the thermodynamic model, it can be inferred that the adsorption process is a spontaneous heat absorption process at room temperature. The MPBN also showed excellent stability and good recoverability after 5 cycles.

Abstract:A cathodic electro-Fenton system capable of efficiently treating tetracycline hydrochloride (TCH) in water was built by preparing a manganese oxide doped nano-graphite (Nano-G) electrode (MnOx/Nano-G electrode) and using it as the working electrode using the sol-gel and hot-pressing methods. The MnOx/Nano-G electrode was characterized by SEM, XRD, XPS, cyclic voltammetry and electrochemical impedance tests. The results demonstrated that MnOx doping could significantly improve the electrical conductivity, electrochemical stability and electrochemical activity of the Nano-G electrode, thereby improving the efficacy of cathodic electro-Fenton treatment of TCH. The best TCH degradation effect was achieved at an initial TCH concentration of 20 mg?L-1, current density of 30 mA?cm-2, initial pH of 5.0 and electrode plate distance of 10 mm. After 60 minutes, 59.27 percent of TCH had been effectively removed, and the TCH degradation efficiency had increased by 18.70 percent when compared to the unmodified Nano-G electrode. Furthermore, the cathodic electro-Fenton system of MnOx/Nano-G had a significantly higher treatment efficiency than the conventional RuO2-IrO2/Ti cathode and titanium mesh cathode. Results indicate that the cathodic electro-Fenton system of MnOx/Nano-G is an efficient and promising technology for TCH treatment.

Abstract:In order to screen out lactic acid bacteria that can protect cells from oxidative stress damage, five different lactic acid bacteria were fermented to obtain fermentation extracts, and the effectiveness and mechanism of the obtained fermentation broth was tested at the biochemical, cellular, and molecular levels. Results showed that the five kinds of lactic acid bacteria fermentation broth extracts have good ability to scavenging ?OH and O2-?. The Lactobacillus plantarum fermented extract (FE1) had the strongest scavenging effect on the two free radicals as 10g/L FE1 can scavenge 49.14% of hydroxyl radicals and 73.99% of superoxide anions. FE1, Lactobacillus paracasei fermented extract 2 (FE2) and Lactobacillus acidophilus fermented extract (FE3) can significantly improve the survival rate of cells (p< 0.05) and the activity of glutathione peroxidase (p<0.05), while reducing the intracellular reactive oxygen species content (p<0.05). Among them, FE1 significantly increased the activity level of catalase and superoxide dismutase in the cell and the total antioxidant capacity of the cell (p<0.05). The results of molecular biology experiments showed that the FE1 can promote the up-regulation of antioxidant genes Sirt1 and activate the key regulatory gene β-catenin in the Wnt/β-catenin pathway, thereby up-regulating the expression of MP30, FoxO3a, and Tbx3 antioxidant genes to enhance its antioxidant activity ability. The good antioxidant effect of the fermentation extract of Lactobacillus plantarum can slow down the oxidative damage of skin cells stimulated by H2O2.

Abstract:Alumina sol, acrylic acid-acrylamide co-polymer (AC-1) and hexamethylenetetramine were used to synthesize alumina spherical granules via oil-drop method, which was then used to prepare Pd/Al2O3 catalyst for the hydrogenation of alkyl-anthraquinone by wet impregnation. The structure of catalysts was characterized by N2 adsorption, XRD, TEM, and CO pulse titration and the effect of adding acrylic acid-acrylamide co-polymer (AC-1) was studied. The result showed that the addition of AC-1 did not alter the crystal structure of the catalyst, but increased specific surface area and pore size, and reduce the size of Pd particles. After using AC-1, catalytic activity in a laboratory reactor rose from 12.5 to 14.5 g/L, space-time yields in the model plant with hydrogen peroxide capacity of 10 kg/d and in the industrial plant with hydrogen peroxide capacity of 7000 t/a were improved by around 77% and 70.0% respectively. Space-time yield in the industrial plant with hydrogen peroxide capacity of 0.2 million t/a increased to 8.35 kg H2O2/ (kg CAT•d), significantly larger than that of commercial counterpart, which was less 6.50 kg H2O2/ (kg CAT•d).

Abstract:With n-octyl triethoxysilane and 3-mercaptopropyl triethoxysilane as modifiers and hydrogen peroxide as oxidant, the surface of hydrophilic nano-SiO2 particles was modified in a water-based environment to obtain amphiphilic nano-SiO2 particles with sulfonic groups and octyl groups, and their chemical structure and thermal stability were analyzed by FT-IR and TG. The amphiphilic nano-SiO2 particles were dispersed in the formation water to prepare the nanofluid, and the stability, interface properties, and imbibition efficiency of the nanofluid were evaluated. Nuclear magnetic resonance technology was used to explore the migration rule of crude oil in core pores during the nanofluid imbibition. The results indicated that the nanofluid was stored for 30 d without delamination phenomenon and therefore exhibited good stability. The hydrophilicity of the core treated with the nanofluid was enhanced. Furthermore, the amphiphilic nano-SiO2 particles could reduce the interfacial tension to 1.7 mN/m. An imbibition recovery factor of up to 22.6% was achieved with the nanofluid. In the initial stage of the imbibition, crude oil in small pores was discharged, while in the later stage of the imbibition, crude oil in large pores was discharged.

Abstract:The layered double hydroxide (LDH) was grown in situ on the surface of montmorillonite (MMT) by hydrothermal method, and the layered double hydroxide@montmorillonite (LDH@MMT) was obtained. LDH@MMT was characterized by XRD, SEM, FTIR and other means, and the results showed that LDH and MMT were compounded together through hydrogen bonds, forming a flower-like structure. The layered double hydroxide@montmorillonite/modified zanthoxylum bungeanum seed oil (LDH@MMT/MZBMSO) was prepared by introducing LDH@MMT into zanthoxylum bungeanum seed oil(ZBMSO). TEM results showed that LDH@MMT was evenly dispersed in MZBMSO. Appling LDH@MMT/MZBMSO to the leather fatliquoring process, compared with MZBMSO, When the quality of LDH@MMT accounts for 12% of ZBMSO, the flame retardant performance of LDH@MMT/MZBMSO treated crust leather was significantly improved, and the oxygen index of crust leather increased from 22.8% to 28.3%, the after flame time was reduced from 87 s to 43 s, the heat release rate, total heat release rate, and smoke production rate of LDH@MMT/MZBMSO treated crust leather were reduced by 43.6%, 73.6%, and 63.5%, respectively. LDH@MMT wrapped on the surface of the crust leather fiber to form a "torrtuous path" that could slow down the release of heat and smoke, a dense carbon layer was formed on the surface of the fiber to further block the heat and smoke released, and isolated oxygen during the burning process of the crust leather, thus improving the flame retardant and smoke suppression performance of the crust leather.

Abstract:This paper reviews the synthetic routes and application of 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd). In terms of the synthetic routes, the route to synthesize HCFO-1233zd(E) with 1,1,1,3,3-pentachloropropane (HCC-240fa) as raw material through gas phase fluorine-chlorine exchange has easy access to raw materials, high conversion rate, high selectivity and industrial value; the route of HCFO-1233zd(Z) synthesis by gas phase isomerization using HCFO-1233zd(E) as raw material not only has the advantages of long catalyst life and high target product selectivity, but also it is easy to realize industrialization. In terms of application, HCFO-1233zd(E) is mainly used as foaming agent and heat transfer fluid, HCFO-1233zd(Z) is mainly used as cleaning agent. It is proposed that the future research focuses in the field of HCFO-1233zd are the development of high-activity non-chromium catalysts and the development of new application technologies for HCFO-1233zd.