Abstract:As the development of intelligent society, thermochromatic material, as a special functional material, holds important application potentials in many fields. In this review, we first introduce the latest applications of thermochromatic materials in the context of intelligent society and then classifies thermochromic materials simply. According to the classification principles, we summarized the color-changing mechanism. Finally, we put forward some insights on its future development.

Abstract:As the demand to energy storage devices for renewable energy, portable electronics and electric vehicles increase, lithium-sulfur (Li-S) batteries have attracted much attention for its extremely high energy density. However, the scientific and technical problems such as low electrical conductivity of elemental sulfur and its discharge products, the polysulfides shuttled between the cathode and anode electrodes, large volume change of sulfur particles during charge and discharge, hinder the demonstration of practical Li-S cells. The advanced multifunctional binder system have been proposed and verified to retard the shuttle of polysulfides and extend the cycling life of a Li-S cell. In this review, the progress on multifunctional bind-ers for lithium sulfur batteries are summarized, including multifunctional binder inhibiting polysulfide shut-tles, binder with multidimensional bonding stabilizing the entire electrode and binder with low interfacial resistance. New insights into challenge and opportunities of multifunctional binder system are also pro-spected.

Abstract:Abstract:Lithium-ion batteries are one of the most popular rechargeable batteries so far. Industrial graphite has been widely used in lithium-ion battery anodes. However, its lower specific capacity and poor rate limit its further application in lithium-ion batteries. Nickel vanadate (Ni3V2O8 and NiV3O8) electrode materials, with economical sustainability, environmental friendliness, high specific capac-ity and excellent rate performance, are considered to be a series of promising new anode materials for lithium-ion batteries. However, the volume expansion of the Ni3V2O8 and NiV3O8 electrodes dur-ing charging and discharging is too large, which results in the powderization of the pole piece materi-al, rapid attenuation of the specific capacity, and poor cycle stability. In this review, the synthesis methods, structural properties of nickel vanadate and the research progress of these new anode mate-rials for lithium-ion batteries are introduced. In addition, several methods for improving the electro-chemical performance of nickel vanadate are emphatically discussed, which includes micro-nano synthesis of the electrode material, synthesis of complex material, surface coating, etc. Finally, the research work in the future is prospected.

Abstract:Phosphaphenanthrene (DOPO) derivatives were a kind of typical halogen-free organophosphorus flame retardants, which were also one of the research hotspots, exhibiting excellent flame retardant effect in both gaseous-phase and condensed-phase and improving the flame retardant performance of polymer materials. The characteristics, flame retardant mechanism, synthetic and application of phos-phaphe-nanthrene derivatives were described in thermoplastic resins (polyamide, polycarbonate, polyure-thane, ABS resin and polylactic acid) and thermosetting resins (epoxy resins and unsaturated polyester resin) in the past decade. Finally, the development trends of flame retardants were pointed out as follows: design of the molecules with high flame retardant performance; establish efficient synthesis method; pos-sess excellent mechanical properties.

Abstract:In this study, cellulose acetate (CA) / chitosan (CS) composite membrane was prepared by freeze-inducing phase separation (CIPS) method. CA and CS were used as fiber bottom and coating layer, respectively. After treating the CA/CS membrane (3.5 % CS) by liquid nitrogen directly, CS surface layer with micron-sized pores was obtained and the cross-section exhibited a thin layer with 1 μm. Pure water flux of CA/CS membrane could reach to 1.01×104 L/(m2•h). The permeate flux of acid blue could reach to 9.26×103 L/(m2•h), and the rejection rate was 98.6%. The adsorption process conforms to the pseudo-second-order kinetics and the Langmuir monolayer adsorption model. Furthermore, the adsorption capacities of membranes were investigated. It tended to be equilibrium in 30 min for dyes. The equilibrium adsorption capacities of membranes for acid blue, acid yellow, disperse yellow, and disperse blue were 92.10, 89.09, 85.03, and 79.62 mg/g, respectively.

Abstract:Under the synthesis of super absorbent resin(SAR), hexadecyl dimethyl allyl ammonium chloride (C16DMAAC) was introduced to graft copolymerization of soluble starch and acrylamide onto the preparation of Soluble starch-g-poly(AM-co-C16DMAAC). The hydrolysis by adding sodium hydroxide (NaOH) under airtight and high temperature environment was also performed. Meanwhile, the best synthesis conditions were optimized by a series of single factor experiments. The structure was investigated by FTIR and SEM, and the water absorption and expansion mechanism were analyzed by the model. The experimental results showed that the most effective preparation conditions of Soluble starch-g-poly(AM-co-C16DMAAC) were determined, the weight of soluble starch was 40% of 10g solid content in 50g polymerization system, the molar ration of AM to C16DMAAC was 99.2/0.8, the volume of ammonium persulfate(APS, 5000 mg/L) was 4mL, the amount of N,N-methylene bisacrylamide(MBA) was 0.02g, lastly the degree of hydrolysis(DH) was 80%. Under this experimental conditions, the maximum water absorbency of Soluble starch-g-poly(AM-co-C16DMAAC) was 1964.96g/g in distilled water and 76.77g/g in 0.9 wt.% NaCl solution, respectively.By simply mixing the polymerized intermediate products with NaOH under airtight conditions at 90℃, sodium hydroxide can participate in a nucleophilic addition elimination reaction with -CONH2 on polymer chains. In this reaction, the transformation of -CONH2 into -COONa is accompanied by the release of ammonia. In addition, the water absorbency of resin can greatly enhanced by introducing C16DMAAC into soluble starch and AM system. Finally, the swelling process of Soluble starch-g-poly(AM-co-C16DMAAC) showed good fittings of water absorbency data to Fickian diffusion model.

Abstract:Dextran-based nanogel with Schiff base structure were prepared by the inverse microemulsion technique, and its functions as drug carrier was studied using HPTS as model drug, which was loaded via the electrostatic adsorption with polyethyleneimine (PEI, crosslinker). The structure of dextran nanogel was characterized by FTIR、SEM and DLS. The dextran nano-hydrogel has a good spherical structure before and after drug loading, and the particle size is mainly distributed at about 459~648 nm. HPTS can be effectively loaded into the dextran nanogel and showed an obvious acidic environment sensitive release behavior. The stronger the acidity, the faster the drug released. The dextran nanogel with Schiff base structure can be used as a pH-sensitive drug delivery system.

Abstract:To utilize the fermentation residue of corn straw, the lignin component was extracted by using alkaline-ethanol method. Effects of ethanol concentration, temperature, residue/solvent ratio and alkaline amount on lignin yield were studied. The obtained lignin was characterized by fourier transform infrared spectroscopy (FTIR), carbon-13 nuclear magnetic resonance (13C NMR) and proton nuclear magnetic resonance (1H NMR) spectroscopy. Results showed that the extraction yield of lignin could reach 93.5% and the content of lignin was up to 94.1% under the condition (temperature was 200℃, ethanol concentration was 50%, m(residue)∶m(solvent)=1:20 and NaOH concentration was 0.5wt.%). In addition, hydroxyl content of the obtained lignin product was 66.5 mg KOH/g. For the preparation of lignin-based polyurethane film, the tensile strength and the elongation at break were 24.0MPa and 224% respectively, and the degradation ratio was 3.3% when the ratio of substitution of polycaprolactone by lignin was 27%. Furthermore, the appropriate addition of glucose into the lignin-based polyurethane film can increase the biodegradation rate and water resistance of the film, reduce membrane permeability and the degradation ratio of the film with 3% glucose adding was 11.0% in 60 days.

Abstract:In this study, LNMO materials with different Al3+ doping amount were prepared. The structure of Li1+xAlxNi0.5Mn1.5-xO4 was characterized by XRD and SEM. The electrochemical properties of the materials were determined by CV test and AC impedance spectroscopy. Discussed the influence of the doping amount of Al3+ on various aspects of the material. Studies have shown that proper doping increases the structural stability of the material and improves the cycle and rate performance of the material. The modification effect was best when the doping amount was x=0.06, and the retention rates of circulating 100 times at 0.5C and 2C reached 95.2% and 90%, respectively. Moreover, the potential difference of the redox peak is small, and the cycle reversibility is the best. The samples prepared by the polymer-assisted method further improved the cycle performance due to the stronger orientation of the {111} crystal face group, and the 100-time retention rate at 0.5C and 2C reached 97.1% and 93%, respectively.

Abstract:In this study, polylactic acid(PLA)-degrading bacteria were isolated and screened from the soil with PLA/PBAT film（Weifang, Shandong），using inorganic salt medium in which carbon source was the PLA. The PLA-degrading bacteria were identified by morphological observation, physiological and biochemical experiments, 16S rRNA gene sequence analysis and phylogenetic tree construction. The degrading bacteria with high protease activity, a research object, was confirmed by hydrolysis circle method. And the protease-producing conditions of the degrading bacteria was optimized by using the folinphenol reagent method and response surface methodology. Under the optimal conditions, the morphology and structure of PLA before and after degradation were analyzed by SEM, FTIR and XRD. The results showed that the PLA-degrading bacteria (Pseudomonas mendocina) was isolated and screened. After optimization, the optimal culture conditions were pH 7.4, inoculum size 1.4 mL and culture temperature 32 ℃. The highest protease activity was up to 32.15 U/mL. At the same time, the protease of PLA-degrading bacteria could catalyzed the ester bond in the degradation material. The degradation rate of PLA could reach 29.35% within 5 days.

Abstract:Abstract: To efficient preparation of (R)-p-chlorostyrene oxide (pCSO), whole cells of E. coli/pveh1Z4X4-59 expressing a Phaseolus vulgaris epoxide hydrolase mutant PvEH1Z4X4-59 was used as biocatalyst to hydrolytic kinetic resolution racemic (rac-) pCSO. In the phosphate buffer (pH=7.0) system, the kinetic resolution of 250 mmol/L rac-pCSO catalyzed by E. coli/pveh1Z4X4-59 was perforemed, retaining (R)-pCSO with an over 99% enantiomeric excess (ees). Moreover, based on the effects of six nonionic surfactants on the EH activity and enantioselectivity of E. coli/pveh1Z4X4-59, Tween-20 was selected as the best reaction additive to construct a Tween-20/buffer system. In the optimized Tween-20/buffer (4%, volume fraction) system, the initial concentration of rac-pCSO catalyzed by 200 mg/mL E. coli/pveh1Z4X4-59 was significantly increased to 800 mmol/L (123.7 g/L), producing (R)-pCSO with 99% ees and 45.7% yield (theoretical yield was 50%). The space-time yield was reached 4.71 g/(L·h). Thereafter, 4.5 g (R)-pCSO was prepared with a total yield of 36.3% in extended 100 mL Tween-20/buffer reaction system.

Abstract:Hexagonal petal SAPO-5 zeolite was synthesized by ionothermal method with high efficiency under the conditions of microwave heating power of 400W, temperature of 180 °C and crystallization time of 20 min, in which a low-dosage eutectic mixture based on succinic acid, choline chloride and tetraethyl ammonium bromide was used as the solvent and template, nanosheets SAPO-5 molecular sieve synthesized by hydrothermal method acted as seeds.The product phase, morphology, pore structure and acidity of the synthesized samples were fully analyzed by XRD, SEM, N2 physical adsorption/ desorption and NH3-TPD techniques. The results of N2 physical adsorption/desorption analysis show that the synthesized sample SC2-T180-t20-P400 is a hierarchically porous SAPO-5 molecular sieve with micro-meso-macropore structure inside, and its external surface area is up to 85 m2/g.The atomic utilization efficiency of inorganic substances in zeolite products can reach 88%. Most importantly, the conversion of benzyl alcohol and the selectivity of diphenylmethane in the alkylation of benzene with benzyl alcohol reached 99.9% and 93.9% respectively, showing better catalytic performance than the traditional hydrothermally synthesized counterpart.

Abstract:A series of inverse уCeO2/CuχCo1-χOδ catalysts were prepared by combinations of co-precipitation method and impregnation method. The influences of the mass ratio of CuO∶Co3O4 and CeO2 loading on the catalytic performance in CO oxidation were investigated using XRD, BET, H2-TPR and XPS techniques. The results revealed that 15%CeO2/Cu0.2Co0.8Oδ catalyst demonstrated the best catalytic performance. It was mainly due to the large specific surface area of 15%CeO2/Cu0.2Co0.8Oδ, more interface, which led to a strong interaction between CeO2 and Cu-Co-O, the more oxygen vacancy, Cu and Co3 on the surface. The reduction temperature decrease of 15%CeO2/Cu0.2Co0.8Oδ enhanced the catalytic activity. Thus, 15% CeO2/Cu0.2Co0.8Oδ catalyst exhibited a higher catalytic activity in the carbon monoxide oxidation with 100% CO conversion at the temperature as low as 75℃ under atmospheric pressure．

Abstract:The WO3 was synthesized by the hydrothermal method using sodium tungstate and ammonium tungstate as raw materials, nitric acid as acid source, and malic acid as surfactant. The samples were characterized analysis by XRD, SEM, and Raman. The experimental results indicated that the addition of malic acid was efficient for the synthesis of monoclinic WO3. A high hydrothermal temperature and a long hy-drothermal time were favorable for the formation of monoclinic WO3. The formation mechanism of monoclinic WO3 in the malic acid-assisted hydrothermal process was also given and discussed. Further-more, we investigated the activity of the synthesized tungsten trioxides composite with CuCrO2 in the photocatalytic water splitting. The reaction results indicated that the activity of WO3 was affected by the type of tungsten source, the amount of added malic acid, the hydrothermal temperature, and the hydrothermal time. A preheat-treatment of WO3 before mixing with CuCrO2 was found to significantly promote the photocatalytic activity of the WO3-CuCrO2 compound. The characterization results suggested that the crystallinity of WO3 was improved by the heat-treatment. In this paper, The WO3 composited with CuCrO2 have the activity of photocatalytic decomposition of pure water for produce hydrogen, and more than 8 μmol H2 was produced under the irradiation of a 300 W xenon lamp for 1 h. It is higher than the activity of the catalyst prepared in the early stage of the research group.

Abstract:A series of sulfonic acid functionalized Br?nsted/Lewis double acdic heteropoly acid based ionic hybrids were synthesized using double sulfonic acid functionalized quarter amunium organic cation, transition metal ions and Keggin type H4SiW12O40、H3PW12O40 as construction unit via molecular self-assembly in water. These compounds acted as catalysts in synthesis of acetal/ketal fragrancy were studied, and founded that the mole ration of ionic hybrid:keton/aldehyde or phenylethyl alcohol :diol or aectal is 0.012:1:1.5, under reflux condition until to no water or alcohol production, a series of benzaldehyde acetal, cyclohexanone ketal, fructone,fraistone and hyacinth body were obtained with yield of 80-99% re-spectively. Ionic hybrid could be recovered and reused by simple filtration, there are no significant decline in yield activity after recycling for 5 times.

Abstract:A new approach for dominating the channel form of the flexible MIL-53(Fe) was developed by using a surfactant-assisted modified method. The surfactant tetraethylammonium hydroxide (TEAOH) can control the channel form of MIL-53(Fe) for a “closed-pore” form, whereas the surfactant polyoxyethylene polyoxypropylene polyoxyethylene (P123) or polyvinyl alcohol (PVA) can dominate the channel form of MIL-53(Fe) for a “large-pore” form. The photocatalytic performance of MIL-53(Fe) with different channel forms was investigated through the degradation of rhodamine B (Rh B) in water under violet light irradiation. The results showed that MIL-53(Fe) with a “large-pore” form exhibited higher photocatalytic activity than that of MIL-53(Fe) with a “closed-pore” form. MIL-53(Fe)-PVA that exhibit the best photocatalytic activity degraded almost 100% Rh B in 90 minutes.

Abstract:Lycopene(Ⅵ) was synthesized via α,β-unsaturated aldehyde with α-tertiary center strategy. Firstly, Pseudoionone(Ⅰ), an inexpensive raw material, was adopted to synthesize 2, 6, 10-trimethylundeca-3, 5, 9-trienal (Ⅱ). Then the key intermediate, diethyl (3, 7, 11-trimethyldodeca-1, 4, 6, 10-tetraenyl) phosphonate(Ⅳ), was formed by Wittig-Horne reaction of the aldehyde II and tetraethyl methylenebis-phosphonate(Ⅲ). The final product, all-E lycopene, can be collected after Wittig-Horner reaction and isomers rearrangement of compound Ⅳ and 2, 7-dimethylocta-2, 4, 6-triene-1, 8-dial(Ⅴ). The synthesis of lycopene needed only 3 steps, with the yield of 37.0%. The structure of all-E lycopene was characterized by IR, HRMS and NMR techniques.

Abstract:Abstract: Flame-retardant polyurethane (TPUP) was synthesized from polyadipic acid 1,4 butanediol glycol(PBA), hexamethylene diisocyanate (HDI) and flame retardant N,N-bis(2-hydroxyethyl)aminomethylene phosphate diethyl phosphate (FCR6) as the main raw material. Flame-retardant polyurethane-based solid polymer electrolyte was prepared by mixing TPUP with LiTFSI and tested by infrared spectroscopy, thermogravimetric analysis, conical calorimetry, mechanical test, electrochemical window, ionic conductivity and charge-discharge performance test. The result showed that TPUP-based electrolyte TPUP25%Li possessed good mechanical strength (up to 2.09MPa) with a ionic conductivity of 3.09?10-4 S/cm at 80 ℃ . The discharge capacity of all-solid-state lithium battery assembled with flame retardant electrolyte reached 159mA?h/g at 0.2C at 80 ℃.

Abstract:PureLi4Ti5O12 was prepared from lithium acetate andtetrabutyltitanate. ThenLi4Ti5O12/ Fe3O4 compound was synthesized as anode material for lithium ion batteries by simple hydrothermal method. XRD, SEMand battery testing system were employed to characterize the structure, morphology and electrochemical properties of pure Li4Ti5O12 and Li4Ti5O12/Fe3O4 compound. The results show that the prepared compound has a good spherical structure, a small particle size(200~300nm), and the electrochemical performance is good. Due to the high theoretical capacity of Fe3O4, the Li4Ti5O12/Fe3O4 nanoparticle compound exhibits a much larger capacity than the pure phase Li4Ti5O12,which can reach around 550.5mA?h/g, and the compound also exhibits superior rate performance over pure Li4Ti5O12.

Abstract:The effects of different factors on the output and current efficiency of electrolytic manganese and man-ganese dioxide in the yin-yang cell were investigated. Solution concentration, electrolysis temperature, pH, current density, additive content and plate material were studied. Experiment shows that the double membrane process 3 rooms, the control solution concentration of Mn2+ 35 to 41 g/L, electrolytic tempera-ture 35 to 37 ℃, cathode pH = 7~7.2; Anodic acid concentration of 2.5mol/L, cathode current density of 350~400A /m2; Anode 800A/m2, cathode additive SeO2 concentration 0.03~0.04g/L, cathode plate using stainless steel plate and anode plate using titanium coated lead dioxide plate, the anode and cathode have high yield, and the current efficiency is higher than 70%,and the output of manganese dioxide in anode 1L electrolyte is higher than 40g.

Abstract:The functionalized rice straw with polyamidoamine(PAMAM) was prepared with epichlorohydrin as crosslinking agent, and its structure was characterized and analyzed by FTIR, SEM, XRD and TG. The adsorption properties of the functionalized rice straw for Nd3+, Sm3+and La3+ were researched. Physicochemical factors such as adsorption time, initial rare earth metal ions concentration, adsorption temperature, and pH affecting magnitude of rare earth metal ions adsorption were researched. At the same time, the kinetics behavior, adsorption isotherm, and thermodynamics parameters of the adsorption process were further investigated. The results showed that the adsorption equilibrium time was about 4 h for Nd3+, Sm3+ and La3+. And adsorption capacity of Nd3+, Sm3+and La3+ were 47.14, 40.11 and 50.12 mg/g, respectively. At the same time, the adsorption process fit the pseudo-second-order kinetic model and Freundlich isotherm, which indicate that the adsorption process is chemical adsorption process. In additional, thermodynamic data of the adsorption process shows that the adsorption process is spontaneous. And the randomness is increased at the solid-solution interface during adsorption process.

Abstract:Zwitterionic diamine monomer N-aminoethyl piperazine propyl sulfonate (AEPPS) was incorporated into hyperbranched polyamide nanofiltration membranes by reacting with trimesoyl chloride (TMC) via inter-facial polymerization to improve the performance of the membranes. The effect of AEPPS concentration on the performances of the membranes were systematically evaluated. Different from the results reported about AEPPS in conjunction with piperazine or m-phenylenediamine, when using AEPPS and hyper-branched polyamide mixture as aqueous reactants, the desalination order of the prepared membranes changed from Na2SO4 > MgSO4 > MgCl2 > NaCl to MgSO4 > MgCl2 ≈Na2SO4 > NaCl and then to MgSO4 > Na2SO4 > MgCl2 > NaCl by increasing AEPPS concentration. Salt rejection rate first increased and then de-creased, while membrane flux showed the opposite trend. The hydrophilicity and anti-fouling properties of the membranes were enhanced by introducing AEPPS into the membranes. When concentration of AEPPS was 0.6 %, the prepared nanofiltration membrane NF06 showed excellent anti-fouling properties. After it being circulated in bovine serum protein or lysozyme pro-tein solution for three times, the flux recovery rates were 99.3% and 99.4% respectively.

Abstract:KC-Al(OH)3/NR composites were prepared by adding a synergistic flame retardant system consisting of carrageenan (KC) precipitated by BaCl2 and nano-aluminium hydroxide (Al(OH) 3) to natural rubber (NR). The flame retardant was added into natural rubber (NR), and the flame retardancy and mechanical prop-erties of NR composites were tested by limited oxygen index (LOI), vertical burning test (UL-94), thermal gravimetric analysis (TG), cone calorimetry test (CCT). The NR containing 15 wt% KC and 15 wt% Al(OH) 3 displayed LOI value of 25% and UL-94 V-0 rating. CCT showed that the total heat release (THR), peak heat release rate (pHRR), peak smoke release rate (pSPR) and Average mass loss rate (AMLR) of NR de-creased by 65%, 12%, 23% and 62% when 15 wt% KC and 15 wt% Al(OH) 3 were added to pure NR.

Abstract:A hyperbranched polymer PADAH was synthesized by acrylamide(AM), acrylic acid(AA), cyclodextrin-modified hyperbranched functional monomer (MAH-β-CD-HPEA) and betaine (DEPS). The effects of initiator dosage, mass ratio of AM and AA, mass ratio of DEPS and MAH-β-CD-HPEA on the polymer solution viscosity were investigated. The results indicated that the optimum polymerization conditions were obtained as follows: initiator dosage of 0.3%, m(AM):m(AA)=2:1(85% of the total mass of the monomer),m(DEPS):m( MAH-β-CD-HPEA)=14.5:0.5(15% of the total mass of the monomer). The solutions properties of PADAH were evaluated. The results showed that the viscosity of 2000 mg/L polymer solution could reach 647 mPa•s, and the viscosity retention rate after shearing for 20 s was more than 80%, at 90°C, the viscosity of PADAH was 237 mPa•s and the viscosity retention rate was 37.5%, Compared with PADA(no hyperbranched functional monomer) and the partially hydrolyzed polyacrylamide (HPAM), PADAH has better solution properties.

Abstract:Four heptamethine cyanine dyes with active hydroxyl groups were prepared using 2,3, 3-trimethylindolenine and 1,1, 2-trimethyl-1H-benzo [e] indole as raw materials. Firstly, two kinds of quaternary ammonium salts were synthesized, then they were condensed with 2-chloro-1-formyl-3-hydroxymethyl cyclohexene respectively. Lastly, C-C substitution in dye medium was achieved by Suzuki-Miyaura coupling reaction. The dye structures were characterized by 1HNMR and FTMS spectra;The absorption spectra of four dyes were determined by UV-vis with ethanol as solvent;The high voltage xenon lamp with current of 13.4A was used as the source of the lamp to study the light resistance of the dyes;Investigated the effect of pH value on dye color and deduced the mechanism of color change. The results showed that the four kinds of four heptamethine cyanine dyes have strong absorption in the near infrared region, and have good light stability in anhydrous ethanol. The study on the spectral properties of dyes at different pH values found that the absorption spectrum of four heptamethine cyanine was greatly affected by pH, and the dyes have the best absorption in the near infrared region when the pH value is 5~7.

Abstract:A high temperature activated industrial gelatin wood adhesive was synthesized via the reaction between gelatin and isocynate groups released by crosslinking agent, using industrial gelatin extracted from waste leather as raw materials and blocked waterborne polyurethane prepared by methyl ethyl ketoxime as crosslinking agent. FT-IR and DSC showed that the hydroxyl group on the methyl ethyl ketone oxime molecule was polycondensed with the isocyanate group on the polyurethane prepolymer, and the maximum unblocking temperature was about 126 °C. SEM showed that the surface of the adhesive was smoother after curing at high temperature, indicating that the compatibility between gelatin and the blocked waterborne polyurethane component was improved. The application test results show that the wet shear strength of adhesive is up to 0.97MPawhen the content of the blocked waterborne polyurethane is 20%of the mass of gelatin aqueous solution, which meets the requirements of the national class II plywood. The optimum hot pressing process conditions are a hot pressing temperature of 150℃, a hot pressing time of 4 min, and a coating amount of 300 g/m2. Keywords: industrial gelatin, blocked waterborne polyurethane, wood adhesive, shear strength Foundation item: National Natural Science Foundation of China(No. 21776169)

Abstract:A gelatin-based adhesive was prepared by the diethanolamine, methyl acrylate, trimethylolpropane and epichlorohydrin were used as raw materials to synthesize the different generation of epoxy-terminated hyperbranched poly (amine-ester) (EHPAE). And then, with gelatin extracted from leather wastes as main material and the different generation of EHPAE are respectively as cross-linking monomer, an environmental-friendly of adhesives for footwear or bags were success-fully synthesized. The structure and relative molecular mass distribution of hyperbranched polymer and adhesive were characterized by FT-IR, 1H-NMR and GPC, moreover, the bonding performance of adhesive were measured. The results showed that the modification effect of EHPAE-III was better than the others, when the amount of EHPAE was 30% of the gelatin, the solid content of the modified adhesive was increased from 11.42% to 30.33%. meanwhile, the shear strength and T-peel strength of the adhesive was improved to 2.216 MPa and 3.375 MPa, respectively, and the water contact angle was 100.9o. The adhesive properties and hydrophobicity of the prepared adhesive were better than the commercial available adhesive, in which the shear strength and T-peel strength are 1.88 MPa and 2.864 N/mm, the water contact angle was 84.8o.

Abstract:The epoxy group-containing fluororesin is obtained by copolymerization of perfluorohexane ethyl acrylate and glycidyl methacrylate; and two amine curing agents are prepared by using perfluoropolyether alcohol, diethylamine and polyether amine as raw materials respectively. Agent. The structure of the fluororesin and curing agent was characterized by FTIR. The fluororesin coating agent with a mass fraction of 1% (based on the total mass of the coating agent) was cured on the surface of the copper plate to form a film. The coating was studied by water contact angle, neutral salt spray test, EIS, polarization curve and the like. Corrosion resistance to copper plates. The results show that the contact angle of fluororesin FX on the surface of copper plate is above 120°, and the salt spray corrosion resistance of F-6 and F-5 series coatings can be more than 24h, which is twice that of commercially available electronic coating liquid EGC-1702, F-5 series fluororesin coating impedance modulus can reach 600Ω or more and double the EGC-1702, and the corrosion current density of F-6 series fluororesin before and after corrosion increases from 1.201×10-4A to 2.649×10-4A, electrochemical impedance spectroscopy and The polarization curve analy-sis showed that the synthesized fluororesin was excellent in corrosion resistance. Thermogravimetric analy-sis showed that the thermal decomposition temperature of the coating was higher than 330 °C and the thermal stability was good.

Abstract:2,3-thiirane-1-(2-furyl)-3-phenyl-1-one (TFPO) was synthesized via a“one-pot” reaction with 1-(2-furyl)-3-phenyl-2-propen-1-one (FPPO), hydrogen peroxide, thiourea as raw material, and Tetrabutylammonium bromide as catalyst. Based on the influence regular of TFPO yield, several parameters such as time, temperature, oxidant dosage and catalyst dosage were screened. And then the orthogonal optimization method was used to in optimize its process parameters. Finally, the optimal synthesis conditions for TFPO were determined as follows: epoxidation temperature is 5℃, vulcanization time is 2 h, vulcanization temperature is 35℃, the molar ratio of FPPO to thiourea is 1:1, and catalyst dosage is 1 g. The yield of TFPO was 85.8% under the above optimized reaction conditions. The structure of TFPO was confirmed by FTIR, 1H NMR and 13C NMR, and TGA、UV were applied to test the perormance of TFPO. The TGA test results showed that the heat resistance temperature of TFPO was 160°C and showed good thermal stability. The UV test results showed that the transmittance of TFPO was over 90% and has excellent light transmission properties.

Abstract:D6-clorprenaline was synthesized with D6-acetone (99.9% atom D) and 2'-chloroacetophenone as starting materials. 2'-Chloroacetophenone is brominated by copper bromide to obtain 2-bromo-2'-chloroacetophenone. D6-isopropyl-amine was synthesized by reduction, bromination, amina-tion, hydrazinolysis and alkali hydrolysis reaction with D6-acetone. Then a one-pot method of amination and reduction was designed to synthesize D6-clorprenaline. The yield based on the amount of substance of D6-isopropyl-amine was 26.2%. The structure of target product was confirmed by NMR, MS, HPLC and X-ray crystal diffraction. Its chemical purity was higher than 98%, and isotopic abundance was 99.7% (atom D). The above compound could be used as an internal standard reagent for the determination of residual clorprenaline.