Abstract:Metal-organic cages (MOCs) are self-assembled compounds with specific cavities by coordination between metal ions and organic ligands. Metal ions with variable valence , functional ligands and cavity with different structures of MOCs provide some possibilities for catalytic active sites. The catalysis of confined MOCs improves the efficiency of different types of reactions. Therefore, this paper describes the research progress of metal-organic cages in the field of catalysis from three aspects: metal ions, functional ligands and their confined cavity. Firstly, metal ions of metal-organic cages are mainly reflected in photoinduced hydrogen production, photoinduced oxygen production and carbon dioxide reduction. Secondly, their functional ligands can regulate the enantioselective ability of asymmetric catalytic reactions. Thirdly, their confined cavity plays a good catalytic effect for the formation of photodimers, and can also significantly promote general organic reactions.

Abstract:As a high-value green natural polymer, nanocellulose has become a good carrier for inorganic antibacterial materials due to its excellent mechanical properties, film-forming properties, high transparency, biodegradability, and good biocompatibility. The composites antibacterial films have certain mechanical strength and transparency and it could improve the stability of inorganic antibacterial agents showing potential application in the field of antibacterial functional films. Therefore, in recent years, inorganic antibacterial nanoparticles are introduced into nanocellulose matrix to prepare nanocellulose-based inorganic composite antibacterial materials, which become important research for new antibacterial materials. Based on this, the research progress focuses on the role and efficacy of nanocellulose in the preparation and application advantages of nanocellulose-based inorganic composite antibacterial films. Finally, the future of nanocellulose-based composite antibacterial films are prospected providing the guidance for the research of nanocellulose-based organic-inorganic composite materials.

Abstract:This study provides a one-step pyrolysis method for the preparation of nanosized zero-valent iron biochar. A spherical ZVI/Biochar composite (ZVIBC) was successfully prepared via carbonization of Fe3+-crosslinked sodium alginate. The effects of pH, Cd(II) initial concentration, adsorbent time, coexisting anions, and aging under air on the adsorption of Cd(II) by ZVIBC are studied. The results of physico-chemical characterization obtained for the ZVIBC loaded with Cd(II) (FTIR, XRD, XPS, and EDS) allowed to propose the mechanism of adsorption. The results showed that the pH was a strong impact on the adsorption of Cd(II) by ZVIBC，4 was selected as the optimum pH value and used throughout the following experiments. The Langmuir model better describe the adsorption of Cd(II) on ZVIBC with the maximum adsorption capacity of 240 mg/g. The main adsorption mechanisms were that the active functional groups (O—H、C—O、C=C、C=O、COO) formed complexes with Cd(II), and Cd(II) generated Cd(OH)2 precipitation with Fe2+ on ZVIBC surface.

Abstract:Dialdehyde carboxymethyl cellulose (DCMC) modified collagen aerogel was prepared by freeze-drying technology using collagen extracted from tannery solid waste as raw material and DCMC as macromolecular cross-linking agent, and its morphology and structure were characterized by FTIR and SEM. The results showed that the introduction of DCMC didn’t change the triple helix structure of collagen, and the prepared DCMC modified collagen aerogel had rich porous structure, low density (8.83~10.38mg/cm3), and high porosity (94.99~97.65%) and good heat insulation performance. When the DCMC content was less than 15%, the compressive stress of the DCMC modified collagen aerogel increased with the increase of DCMC content. In addition, in order to further improve the thermal insulation performance and durability of DCMC modified collagen aerogels, the phase change materials were filled by vacuum impregnation and the hydrophobic coating was coated to prepare the DCMC modified collagen aerogel composite phase change materials.The experimental results of heat insulation, leakage and antifouling experiments showed that the aerogel composite phase change material has more excellent heat insulation effect than the aerogel, which expands its practical application range.

Abstract:In order to develop covalent organic frameworks (COFs) with strong π-π conjugation effect, excellent photocatalytic performance and high photocatalytic oxygen evolution reaction (OER) activity, the N,N'-p-acetonitrile benzene-3,4,9,10-naphthalimide and 1,3,5-tris(p-formylphenyl)benzene were used as monomers to synthesize sp2-carbon-linked and hexagonal NP-COF by solvothermal method. Encouragingly, NP-COF was confirmed to be an excellent semiconductor photocatalytic catalyst with good light absorption performance, good carrier generation and mobility by structure, morphology and photoelectric performance characterization. It could efficiently catalyze the oxidation reaction of water molecules under visible light, and the average oxygen production rate reached 344 μmol/(g·h) with 7.4 mg Co(NO3)2?6H2O as a co-catalyst.

Abstract:A novel water-soluble Janus-type polyhedral oligomeric silsesquioxane (AS-POSS) was synthesized by thiol click reaction between acrylo polyhedral oligomeric silsesquioxane (Acrylo-POSS) and 3-mercapto-1-propane sulfonate (MPS) in one step. The water solubility of AS-POSS and the molar ratio of double bond to sodium sulfonate group can be regulated by changing the feed ratio. A series of AS-POSS/PAA/PAM hydrogels with different content of AS-POSS were prepared by copolymerization of AS-POSS with acrylic acid (AA) and acrylamide (AM). When the amount of AS-POSS is 1% of the total monomer mass, the equilibrium swelling ratio of 1% AS-POSS/PAA/PAM hydrogel reaches 512, the elongation at break was 1074%, the compressive strength was 583 kPa and the compressive strain was 89%. The yield strains were 330%, which were higher than those of MBA/PAA/PAM hydrogels in the control group, indicating that the introduction of AS-POSS significantly improved the swelling degree of hydrogels, and significantly enhanced the toughness, compression resistance and dynamic mechanical properties of hydrogels. AS-POSS/PAA/PAM hydrogel has good electrical conductivity. The ionic conductivity of 25%AS-POSS/PAA/PAM hydrogel was the highest with ionic conductivity of 0.401 S/m.

Abstract:Abstract: Modified basalt fiber (MBF) has been prepared by surface treatment of basalt fiber (BF) with γ -aminopropyl triethoxysilane (KH550), Ehtpb-based polyurethane (EPU) containing epoxy groups has been synthesized with epoxy-terminated hydroxyl polybutadiene (EHTPB) as matrix, the damping material MBF@EPU has been prepared by epoxy ring-opening reaction between MBF and EPU. The surface morphology and structure of basalt fiber before and after modification and polyurethane were characterized by SEM, FTIR and XPS. The results show that MBF and MBF@EPU are successfully prepared. The results of dynamic thermomechanical analysis (DMA) and tensile test show that basalt fiber can improve the damping and mechanical properties of EPU, The effective damping temperature range of 10MBF@EPU is 140.0℃, the tensile strength is 8.68 MPa and the elongation at break is 329.04%, showing the best comprehensive performance.

Abstract:Titania nanotube (TiNTs) is a new one-dimensional nano material, which has attracted much attention due to its large specific surface area and unique hollow tubular structure. The synthesis mechanism, influencing factors, advantages and disadvantages of preparation methods are reported. The promotional effect of TiNTs as the carrier of SCR (selective catalytic reduction) catalyst on the adsorption performance, oxidation-reduction performance and anti-poisoning performance of SCR catalyst as well as the effect mechanism was discussed. Finally, the main research direction of TiNTs as the catalyst carrier is to improve denitration activity at low temperature and anti-poisoning performance of catalysts by regulating the morphology and surface modification of TiNTs and coupling with the active components of catalysts.

Abstract:In order to improve the stretchability of conductive fibers, a wet spinning method is used to prepare polyurethane fibers (TPU fibers). The fibrous nano-silver-polyurethane conductive fiber (AgNPs-TPU conductive fiber) is prepared by immersing in a silver trifluoroacetate solution and reducing it.Explore the effects of different preparation conditions on the conductivity and stretchability of AgNPs-TPU conductive fibers, and study the tensile sensing properties of AgNPs-TPU conductive fibers. The results showed that the quality score of the selected TPU concentration is 25%, the concentration of the immersed silver trifluoroacetate solution was 20mg/mL, and the immersion reduction is 4 times. The resistance of AgNPs-TPU conductive fiber is 10.79Ω.The tensile strength is 5.14MPa.The elongation at break is 576.18%, and it has good electrical conductivity and mechanical properties. In the case of different tensile strains, AgNPs-TPU conductive fiber can characterize different tensile strain information through the change of the resistance rate value. AgNPs-TPU conductive fiber can realize the stable conversion of the tensile strain signal into an electrical signal and has good tensile sensing performance.

Abstract:Magnetic Fe3O4 nanoparticles were deposited on the high-performance bacterial cellulose (BC) by the in-situ co-precipitation. Subsequently, the magnetic and conductive BC@Fe3O4/AgNWs composite films with hierarchical structures were successfully prepared via the two-step vacuum assisted filtration method. The microstructures and properties were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and vector network analyzer. The results show that when the AgNWs area fraction is 1.8 g/m2, the electromagnetic interference shielding effectiveness (EMI SE) of the composite films can reach 56 dB. Moreover, there is a good interface interaction between the AgNWs and BC@Fe3O4 matrix, thus leading to the excellent mechanical properties of BC@Fe3O4/AgNWs composite films. The maximum tensile strength and elongation at break are 84.6 MPa and 4.05%, respectively. The resultant flexible, mechanically strong and high EMI SE bacterial cellulose-based composite films have good application prospects in the fields of flexible wearable electronic devices.

Abstract:Polyurethane based flexible form-stable phase change materials (PU/APDMS/CNTs) with enhanced thermal conductivity were prepared by one-pot method using polyethylene glycol (PEG10000) and aminopropyl terminated polydimethylsiloxane (APDMS) as soft segments, toluene 2, 4-diisocyanate (TDI) as hard segments, and carbon nanotubes (CNTs) as functional materials. The structural characteristics and thermal properties of the materials were characterized by FTIR, XRD, DSC and TGA. When the content of APDMS is 10 wt%, the enthalpy of phase change of PU/APDMS/CNTs is 88.3 J/g. The PCM does not undergo thermal decomposition at 200℃, and has good thermal stability and figuration performance. The composite phase change material with 5 wt% carbon nanotubes can realize photothermal energy conversion and thermal energy storage with an efficiency is 62.8%. Compared with the phase change material without carbon nanotubes, the thermal conductivity is significantly enhanced and the heating and cooling temperature rate is increased by 2.75 times.

Abstract:Long-chain fatty acid sodium salts have high Krafft temperature (KT) and poor tolerance to inorganic salts, which is not conducive to their usages in low temperature and salt-containing systems. Therefore, dodecanoic acid (C12) were associated with trimethylamine (TMA), dimethylethylamine (DMA), methyldiethylamine (MDA), triethylamine (TEN), tetramethylenediamine (TMEDA), dimethylethanolamine (DMEA), methyldiethanolamine (MDEA), triethanolamine (TEA) to obtain counterion coupled surfactants of C12-TMA, C12-DMA, C12-MDA, C12-TEN, C12-TMEDA, C12-DMEA, C12-MDEA and C12-TEA. Both KT and NaCl tolerability were measured. The results showed that KT of C12-TMA, C12-DMA, C12-MDA, C12-TEN, C12-TMEDA and C12-DMEA were lower than that of sodium dodecanoate (C12-Na). The KT of C12-TMA, C12-DMA, C12-MDA, C12-TEN and C12-TMEDA were lower than 46 ℃ when the mass concentration of NaCl (ρNaCl) was 25.0 g/L. The appropriate amount of NaCl improved the stability of emulsions formed respectively by C12-Na, C12-TEN and C12-TMEDA solutions with dodecane, but excessive NaCl caused surfactants flocculation. The flocculation of C12-TEN and C12-TMEDA occurred when ρNaCl was 23.0 g/L, which was 53% higher than that of C12-Na (15.0 g/L). Fatty acid amines did have better NaCl tolerance than their sodium salts.

Abstract:A chiral tungstic ionic liquid was prepared with 1,12-dibromododecane, S-nicotine and sodium tungstate. Sodium silicate was taken as silicon source. And then functionalized hollow mesoporous silica spheres were prepared by a one-step hydrothermal method. They were characterized by SEM, TEM, FTIR, UV-Vis, N2 adsorption-desorption, XPS, ICP-OES, contact angles, electronic circular dichroism(ECD), etc. and their catalytic performance was investigated by the dihydroxylation of olefins. The results showed that the diameter of the hollow mesoporous silica sphere is about 100 nm, the BET surface area is 20-53 m2/g, and the average pore diameter is 7.7-16 nm. The chiral tungstic ionic liquid was successfully embedded in the mesoporous hollow sphere. The spherical solids presented the circular dichroism. The catalyst with n(W)∶n(Si)=0.25∶0.75 performed best during the olefin dihydroxylation reaction, with yield of (R)-phenylethylene glycol of 89.6% and even up to 87% after being recycled for 5 times. Since the contrast sample without tungsten was observed as amorphous nanoparticles, it can be speculated that the tungstic-based ionic liquid displayed a structure-directing effect on the formation of mesoporous hollow spheres.

Abstract:MoS2 has drawn significant attention in the field of electricity, energy and catalysis due to their unique two-dimensional "sandwiched" layered structure. MoS2 mainly exists in the form of 1T and 2H phases because the different coordination modes of Mo with S atoms. In general, 1T-MoS2 has a larger interlayer spacing and more catalytically active sites, and shows better performance than 2H-MoS2 in many fields. Via controlling the lateral displacement of the S-plane and as well as the electron filling state of the 3d orbital of Mo, the 1T-MoS2 could be synthesized by the directional regulation of 2H-MoS2. In view of this, the research progress of the preparation of 1T-MoS2 from 2H-MoS2 by directly regulating is reviewed, and the methods and mechanisms involved in the main influencing factors in the regulation process are described in detail. At the same time, the application of 1T-MoS2 in the fields of hydrogen evolution, battery, photo and thermal catalysis is summarized, which can lay a certain foundation for the directional synthesis and application of 1T-MoS2. In addition, the prospects for the practical application of 1T-MoS2 in the future are also prospected.

Abstract:Mo2C/Al2O3 and Ni-Mo2C/Al2O3 catalysts were prepared by co-impregnation and temperature-programmed carbonization, using macroporous alumina doped with molecular sieve as the carrier and Ni as the modification agent. The crystal structure, micro-morphology and pore structure of the catalysts were characterized by XRD, TEM and N2 adsorption-desorption, and their performances in the reverse water-gas shift were investigated. The XRD results reveal that the characteristic diffraction peaks of Ni3Mo3N appeared at 23.2?, 30.2?, 40.8?, 43.1?, 45.4?, 51.6?, 59.6?, 62.7? and 71.0? for the modified Ni catalyst MNCAS, this may be ascribed to insufficient carbon content due to the addition of Ni. TEM results also showed that that the lattice spacing of Ni3Mo3N in MNCAS catalyst is 0.21 nm, 0.22 nm and 0.27 nm respectively, and the addition of Ni effectively improved the aggregation of Mo2C. N2 adsorption-desorption demonstrate that the catalyst had good mesoporous structure. The catalytic evaluation results indicate that MCAS catalyst exhibits high activity for the RWGS reaction, the selectivity of CO is 93.87 %. Ni modified MNCAS-8 catalyst shifts the reaction further to methanation, and the methane selectivity reached 84.37 % at low temperature. This is ascribed to the formation of Ni3Mo3N after Ni addition, which has higher methane selectivity.

Abstract:Mn-Co spinel catalysts with different Mn/Co molar ratios were prepared by coprecipitation method using Mn(NO?)?, Co(NO3)2?6H2O, KMnO4 and Na2CO3 as raw materials and characterized by XRD, BET, TEM, XPS, H2-TPR and O2-TPD. The catalytic oxidation of ethyl acetate by the catalysts was evaluated. The results showed that the change of Mn/Co molar ratio could change the active sites of spinel catalysts. When Mn/Co molar ratio was 1∶1, the prepared Mn1Co1Ox (2≤x≤3) had the most active sites and exhibited the best catalytic activity [Temperatures at 50% and 90% conversion of ethyl acetate (T50 and T90) were 151 ℃ and 164 ℃, respectively. And the activation energy (Ea) was 120.2 kJ/mol], which was directly related to the oxygen vacancy (OV) content, Mn4+ and Co2+ concentration on the surface of catalysts. The synergistic effects of OV and metal cation electron exchange (Co2++Mn4+?Mn3++Co3+) on the catalyst surface constructed "OV-Mn4+-O-Co2+" efficient active sites.

Abstract:The process of resolution of ibuprofen by enzymatic esterification was explored using racemic ibuprofen as the reaction substrate. The racemic ibuprofen was selectively esterified by CAL-B. The reaction conditions were optimized, such as the type of alcohol, the reaction medium, the molar ratio of substrate, the amount of enzyme, the type and amount of desiccant, temperature and time. Optical pure S-ibuprofen was obtained with a yield of 56%. Chemical racemization of the esterification product was then carried out. Dimethyl sulfoxide was used as the reaction medium, racemic reaction of ibuprofen was catalyzed by lithium diisopropylamide, enzymatic resolution after complete racemization can still achieve the previous effect. The utilization rate of ibuprofen can reach more than 90% after seven cycles.

Abstract:In order to solve the problem that bindarit (BIN) is difficult to industrially produce, a new and efficient method for the synthesis of BIN was reported. Firstly, methyl 1H-indazole-3-carboxylate (Ⅰ) was prepared by using 1H-indazole-3-carboxylic acid as the starting material. Then, the intermediate Ⅰ reacted with benzyl bromide to obtain methyl 1-benzyl-1H-indazole-3-carboxylate (Ⅱ), and the ester group was further converted to (1-benzyl-1H-indazol-3-yl)methanol (Ⅲ) by reaction with sodium borohydride. Finally, the target product BIN was obtained by the reaction of the intermediate Ⅲ with chloroform and acetone in the presence of sodium hydroxide. The optimum conditions for the synthesis of BIN were obtained as follows: n(Ⅲ)∶n(NaOH)∶n(CHCl3) = 1∶10∶4, reaction temperature is 55 ℃, reaction time is 3 hours. The structure of the BIN was confirmed by 1H NMR, 13C NMR, HR-MS and elemental analysis. This method is characterized by high yield, simple and convenient operation, cheap and easily available raw materials and easy industrialized production.

Abstract:Ferroptosis is a newly discovered method of programmed cell death, the process of which is related to iron-dependent lipid peroxidation metabolism. In this paper, the FeⅢEGCG network structure formed by the coordination of epigallocatechin-3-gallate (EGCG) and Fe3 is used as the nanocarrier, and the ferroptosis inducer sorafenib (SRF) is loaded to prepare nanocomplexes. The nanocomplexes were characterized by particle size measurement, Zeta potential measurement and the content ratio measurement of each substance. The results of the activity evaluation showed that the nano drug containing SRF has obvious inhibitory effect on the growth of tumor cells, and the survival rate of tumor cells is about 30%. At the same time, it was found that the nanocomplex has a synergistic effect on tumor cell growth inhibition in various forms, and induction of cell ferroptosis is indeed one of the ways of action of the nanocomplex.

Abstract:Two dihydroxypyranone compounds were synthesized by acetylation, palladium hydrogenation, carbonyl α-acetoxylation and deacetylation from maltol or ethyl maltol. The structure of each reaction products were characterized by 1H NMR, 13C NMR and high-resolution mass spectrometry, the synthesis process was optimized, and the antioxidant activity of the compounds were tested by quenching free radical reaction system. The results showed that the scavenging rates of dihydroxypyranone on ABTS+?, DPPH? and galvinoxyl? were 88.9%, 83.8% and 68.4% respectively, which were significantly higher than those of vitamin E and butylated hydroxytoluene. The structure-activity relationship study shows that the introduction of hydroxyl groups into the structure of pyranone or the enhancement of the electron donating ability of side chain substituents can improve the free radical scavenging ability of compounds, which provides a reference for the synthesis and development of new antioxidants.

Abstract:A series of composite films were obtained by blending lotus root starch and whey protein at mass ratios of 1:0.3, 1:0.4, 1:0.5, 1:0.6 and 1:0, and the effects of different proportions of whey protein on membrane properties were explored. The composite films were characterized by SEM, XRD, FTIR, DSC and TG, and the mechanical properties and barrier properties of the composite films were measured at room temperature. The results showed that the addition of whey protein improved the mechanical properties and barrier properties of the film, especially when the lotus root starch: whey protein = 1:0.5, the interaction between the film-forming substrates, the tight binding, good compatibility, and the mechanical properties and barrier properties are the best, the tensile strength and elongation at break reach 11.66 MPa and 14.71 % respectively, and the thermal stability is good.

Abstract:In this study, CX-TiO2-La(x) series composites were prepared by sol-gel method and doped with metal element lanthanum to modify TiO2, which were used to treat simulated soil leaching (solubilization) wastewater under visible light, and the structure and properties of the materials were characterized. The results show that CX-TiO2-La(x) series composites can achieve enrichment and degradation of solubilized PHE. All CX-TiO2-La(x) series composites is mainly composed of amorphous carbon, rutile TiO2 and La2Ti2O7. When the addition of lanthanum chloride was 0.5%, the removal efficiency of CX-TiO2-La(0.5) for solubilized PHE was the best, reaching 83.6% (irradiated with 500 W xenon lamp for 5 h). CX-TiO2-La(x) series composites were all with characteristics of mesoporous, moreover, the composite second-order kinetic model of PHE adsorption process fits well with Langmuir model with a spontaneous chemical adsorption process. It was speculated that the heterojunction structure formed to expanded the corresponding photocatalytic range of TiO2, and achieved high photocatalytic degradation efficiency under visible light. After 8 cycles, CX-TiO2-La(0.5) still had a high removal efficiency of solubilized PHE.

Abstract:The ferroferric oxide @ silicon pillared montmorillonite catalytic material (Fe3O4@SPC) was prepared by a one-step interlayer template method using calcium-based montmorillonite (Ca-MMT).The morphology and structure of the material were characterized by XRD, FTIR, BET and SEM. The results showed that Fe3O4@SPC has d001=3.30 nm large crystal plane spacing and 4.47 nm mesoporous aperture, and most of Fe3O4 particles were dispersed on the surface of SPC. The catalytic activity and stability of Fe3O4@SPC were evaluate with phenol. The optimized conditions were as follows: the mass concentration of phenol is 100 mg/L, the pH value is 3.5, the mass concentration of catalyst is 0.5 g/L, H2O2 dosage of 0.2 mL and the reaction time is 120 min, the degradation rate of phenol is 100%. The removal rate of phenol remained above 90% after the catalyst was recycled for 5 times. Tert-butyl alcohol quenching experiment, revealed that ?OH oxidation played a key role in heterogeneous Fenton-like catalytic oxidation degradation of phenol. And the possible degradation path of phenol was speculated by the intermediates of phenol degradation with GC-MS.

Abstract:Using sodium tripolyphosphate (STPP) as core material and chitosan (CS) as wall material, the flame retardant microcapsules CS@STPP were successfully prepared by ionic gel method. The surface morphology and chemical structure of the microcapsules were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The effect of synergistic effect between CS@STPP and expandable graphite (EG) on flame retardant performance of NR/EUG rubber was investigated by adding CS@STPP and EG to natural (NR)/ EUG rubber in a certain proportion. The flame retardancy of FRBR was analyzed by limiting oxygen index (LOI), vertical combustion test (UL-94) and cone calorimetry (CCT). The results showed that the combustion performance of FRBR decreased significantly,LOI reached 28.4%,UL-94 reached V-0 grade, and the maximum heat release rate decreased by 30%.

Abstract:In order to improve the dispersion of zeolite in rubber and enhance the interfacial interaction between zeolite and rubber. In this paper, natural zeolite (NZ) was modified by bis - (γ -triethoxylsilyl propyl) tetrasulfide (S) and nitric acid（H）, and then modified zeolite (S-HNZ) and natural rubber (NR) were mixed to prepare modified NR/NZ composites. The effects of different modified zeolite on the properties of natural rubber were studied. The structure of natural rubber and modified zeolite was characterized by Fourier infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscope (SEM). The vulcanization properties, dynamic thermal mechanical properties (DMA) and mechanical properties of the rubber composite were investigated. The results showed that the framework of natural zeolite (HNZ) was dealuminated and becomes hydrophobic after acid treatment, and silane was successfully grafted onto the surface of natural zeolite. The scorch time and curing time of rubber composite with S-HNZ were shortened, which was accelerated the curing reaction rate of rubber composite. In addition, compared with those of NR composites, the stress at 300% strain and tensile strength and properties of NR/S-HNZ composites were increased by 46.7% and 10.8%, respectively. DMA results revealed that NR/S-HNZ storage modulus (E') and glass transition temperature (Tg) were higher than NR, indicating that after compound modification, the cross-linking density of the composite material increases, forming a stronger cross-linking network, which greatly improves the interfacial bonding strength between zeolite and rubber macromolecular chain.

Abstract:In order to meet the requirements of flame retardant and environmental protection of woven wool, using biomass phytic acid (PA) and feather keratin (FK) as raw materials, terpolymer 〔P(GMA-co-FHBMA〕-g-PEGMA) as crosslinking agent, based on the process of dip rolling and baking.PA/P(GMA-co-FHBMA)-g-PEGMA/FK flame retardant coating was constructed on the surface of woven wool fabric. FR-IR, SEM, limiting oxygen index (LOI) and TG were used to characterize and measure the infrared characteristic absorption, surface microstructure, flame retardancy and thermal stability of woven wool before and after flame-retardant finishing. The results showed that PA/P(GMA-co-FHBMA)-g-PEGMA/FK flame retardant coating was successfully constructed on woven wool fabric by the process of dip rolling and baking. Compared with the unfinished woven wool fabric, the LOI value of the woven wool fabric after PA/P(GMA-co-FHBMA)-g-PEGMA/FK flame-retardant finishing can reach 32.5%, the damage length is reduced to 96mm, Both the after-flame time and after-glow time is reduced, and it has little influence on the breaking strength and feel of the fabric. The thermal stability of wool fabric is improved and stable carbon layer is formed. After 15 times of washing, its LOI value is greater than 27.0%, showing good durability.

Abstract:Graphene oxide (GO) was applied to UV protective finishing of silk fabrics. And the GO absorbed on the surface of silk fabrics was reduction to reduced graphene oxide (RGO). The UV protective performance of GO and RGO finished silk fabrics was researched. And the UV protective durability of RGO finished silk fabrics was tested. The silk samples were characterized by SEM and Raman spectra. The results showed that the optimal UV protective finishing process, GO 0.5 g/L, sodium hydrosulfite 1 g/L, reduced at 75 ℃ for 5 min, the UPF of finished silk fabrics was above 40, obtained excellent UV protection effect. The anti-UV performance of RGO finished silk fabric changed little after several times of washing, indicating that the durability of RGO finished silk fabric is excellent. The SEM and Raman results showed that the GO was deposition on the surface of silk fabrics.

Abstract:Using glycidyl oleate and glycerol as raw materials, under the action of solid acid catalyst（sulfuric acid supported on activated carbon）, dipolyglycerol oleate is prepared by ring-opening reaction. The structure of the product was analyzed and characterized by FTIR and 1HNMR, and it was used as a softening and moisturizing agent to be coated on facial tissue to study the paper's properties such as softness, moisture retention, and tensile strength. The results show that dipolyglycerol oleate has excellent softening and moisturizing properties. When the amount of dipolyglycerol oleate is 0.25% of the mass of glycerin aqueous solution, the softness (49 mN) of facial tissue is better than that of silicone softeners on the market. The softness of the modified facial tissue (68 mN) is due to the fact that the macromolecular softener can repair the defects on the fiber surface, thereby improving the flatness of the fiber surface. And when the temperature is 30 ℃ and the humidity is 60%, the water retention rate (98.2%) of the facial tissue coated with dipolyglycerol oleate softener is also slightly higher than that of the facial tissue coated with silicone softener (96.5%).

Abstract:To improve the bonding strength and water resistance of starch adhesive, a high properties biomass adhesive was prepared by grafting copolymerization using corn starch as main raw material, itaconic acid and silica sol as graft monomers. The effects of reaction conditions on grafting rate, viscosity, bonding strength and water resistance of starch adhesive were investigated by single factor experiment, the structure and properties of starch adhesive were characterized by FTIR, TGA, XRD and SEM. The results indicated that itaconic acid was successfully grafted onto starch molecules with grafting rate of 6.35% and grafting efficiency of 87.03%, and when the starch mass fraction was 30%, the graft monomer itaconic acid content was 7.5%, reaction temperature was 70 ℃, reaction time was 3.5 h, the modified starch adhesive had the best performance, the water resistance time was 95 h (original starch adhesive was 4 h), the dry and wet strength was 2.28 MPa and 1.52 MPa respectively (original starch adhesive was 0.85 MPa and 0 MPa respectively), which met the national standard for type Ⅲ plywood, the thermal stability of starch adhesive was improved simultaneously.

Abstract:4-Ethoxycarbonyl-3,5-dimethyl-2-cyclohexen-1-one was obtained in 95 % yield via Robinson annulation of ethyl acetoacetate with acetaldehyde over sodium carbonate. The Robinson annulation catalyzed by sodium carbonate system was extended to diverse substrates. Under the catalysis of this system, both aliphatic aldehydes and aromatic aldehydes can be smoothly converted into corresponding disubstituted cyclohexenones. The cyclization product, 4-ethoxycarbonyl-3,5-dimethyl-2-cyclohexen-1-one can be almost quantitatively converted into the key intermediate 3,5-dimethyl-2-cyclohexenone through saponification and decarboxylation, and the yield of 3,5-dimethyl-2-cyclohexenone was 99 %. Direct dehydrogenation aromatization of 3,5-dimethyl-2-cyclohexenone was successfully realized to yield 3,5-dimethylphenol. The structures of the product and intermediates were characterized by 1HNMR and 13CNMR. The total yield of 3, 5-dimethylphenol was 66 % under the strategy established in this paper. Besides, this method was successfully applied to the synthesis of 3-methyl-5-propylphenol, which exhibited universal applicability.

Abstract:Abstract: Aryl ketones are important organic compounds, which are widely used in organic synthesis, biomedicine and functional materials. Herein, using acidic zeolite HBeta as a heterogeneous catalyst, the hydration reaction of aryl alkynes to prepare aryl ketones is realized under mild conditions without noble metal catalysts and toxic ligands. By comparing the reactivity of the both Beta catalysts with different amounts of acid sites, it can be seen that the weak acid and medium strong acid sites of the catalyst are most likely the active sites for the alkyne hydration reaction. HBeta catalyst possesses more weak acid and medium strong acid sites than Beta, showing excellent catalytic activity in this system. The best yield (100%) was obtained at 120 ℃ for 6 h of the HBeta-catalyzed phenylacetylene hydration reaction. As an ideal alkyne hydration catalyst, HBeta zeolite showed good reproducibility with no obvious loss of activity after at least 5 cycles. The catalytic system showed good compatibility with different alkyne substituents, providing a valuable process route for the preparation of ketones.