Abstract:Hydrogels have plentiful insights and opportunities in flexible and wearable fields due to their excellent flexibility, ion transport, and adjustable mechanical properties. However, hydrogel electronic devices are prone to freeze in cold climate, which severely limits the application potential of hydrogel electronic materials in cold environments. By introducing cryoprotectants into hydrogels, the anti-freezing properties of hydrogels can be endowed and the working temperature of hydrogels electronic devices also can be broadened. In this review, the preparation methods and freeze-tolerance mechanisms of anti-freezing hydrogels in recent years were summarized from the aspects of solute ions, ionic liquids, organic solvents or antifreeze proteins-modified hydrogels. Furthermore, the application progress of anti-freezing hydrogels in flexible electronics such as the supercapacitor, sensor, and battery were expounded thoroughly, and their problems and challenges were concluded. Finally, the development trend of anti-freezing hydrogel electronic materials was prospected, and it was pointed out that the utilization of natural raw materials in the exploration of anti-freezing hydrogels with excellent mechanical properties, electrochemical performances, bionontoxicity, biocompatibility and biodegradability will become the focus of further research, while the design optimization of flexible electronic devices, the improvement of the safe reliability of devices, and the output stability will be also an important research direction. The preparations and applications of anti-freezing hydrogels will promote the rapid development of flexible electronic functional materials.

Abstract:PVC-based damping materials are prepared with polyvinyl chloride (PVC) as matrix, dioctyl terephthalate (DOTP) as plasticizer, inorganic CaCO3 as filler, calcium and zinc as heat stabilizer, OP-10 as emulsifier and liquid paraffin as lubricant. Then properties and morphology of the sample were characterized by using DHR, DMA, SEM etc. The orthogonal design was used to explore the influence of each component on the performance. The results show that the ratio of filler CaCO3 and plasticizer DOTP has the most significant effect on its damping performance. When the raito of PVC: CaCO3: DOTP: OP-10 is 45: 33: 22: 2, and the frequency is within the range of 0.01～150 Hz at 25℃, tan δ maximum value increases from 0.497 to 0.604;the apparent viscosity at a shear rate of 0.1 s-1 is 3738 Pa·s, and at a shear rate of 150 s-1 is 2.19 Pa·s, which shows that the sample has excellent sag resistance and stability. The micro-aggregation model was constructed through LASD morphology analysis, and the mechanism of the agglomeration-de-agglomeration of rigid fillers and the deformation of polymer microspheres on rheological properties was proposed, which provided technical ideas and theoretical foundations for the continuous research of LASD.

Abstract:PS-g-SMCC micro-plates which are easy to immobilize proteins were prepared by initiating activated polystyrene (PS) micro-plates with acrylamide plasma and grafting succinimidyl 4-(N-maleimidomethyl)cyclohexane-1-carboxylate(SMCC) connector. The surface composition, structure, morphology and protein adsorption properties were characterized by FTIR, EDS, SEM, contact Angle tester and enzyme calibration. The results showed that acrylamide and SMCC were grafted successfully on the surface of PS micro-plates. When the discharge powers was 500 W and the processing time was 300 s, the grafting effect of acrylamide was the best, and the surface of the micro-plates showed excellent super-hydrophilic ability. When the SMCC concentration was 5 g/L, the maximum protein adsorption capacity of bovine serum protein was 903.08 ng/cm2. The protein adsorption capacity was 2.93 times higher than it of the untreated PS micro-plates, which effectively improved the sensitivity of PS micro-plates in ELISA detection.

Abstract:By using copper nitrate and trimesic acid as raw materials, a metal organic framework material HKUST-1 is rapidly prepared by the hydrotalcite method at room temperature (25 ℃) within ten seconds, and is characterized by XRD, SEM and N2 adsorption. The adsorption isotherms, kinetics and adsorption-desorption cycle performance of toluene on the HKUST-1 are measured. The results show that the addition of hydrotalcite enables rapid synthesis of HKUST-1 within ten seconds at room temperature. The BET surface area of HKUST-1 is 2170.7 m2/g and total pore volume is 0.97 cm3/g. The saturated adsorption capacity of toluene on the material at 25 ℃ reaches 6.67 mmol/g. Under low relative partial pressure (p/p0≈0.02), the toluene adsorption capacity on the HKUST-1 is about 10 times higher than other materials. After five adsorption-desorption cycles, the toluene saturated adsorption capacity on the material is almost unchanged, and it has good regeneration performance.

Abstract:Peptide foliar fertilizer (Pep) was prepared from edible gelatin by acid method. Then Pep was used as a chelating agent and iron sulfate was used as a iron source to prepare peptide chelated iron foliar fertilizer (Pep-Fe). FTIR, SEM, and TG were used to characterize and observe the structure and morphology of Pep and Pep-Fe separately, and the planting experiment was carried out. The reaction conditions for the preparation of peptide and peptide chelated iron were optimized based on peptide browning, amino nitrogen content and iron chelating rate. The results showed that the optimum reaction conditions were as follows: temperature 70 ℃, reaction time 7 h, mass ratio of gelatin protein to water 1:6, mass ratio of gelatin protein to concentrated sulfuric acid 1:1.25. The prepared peptide did not turn brown and the amino nitrogen content was 125.49 mg/ ml. Under the conditions of temperature 50 ℃, reaction time 1.5 h, pH4, and the mass ratio of peptide to iron sulfate of 2:1, the chelating rate of iron was 53.89%.

Abstract:The superabsorbent polymer was synthesized by using aromatic gum (KG), acrylic acid (AA), sulfamic acid(AA) and potassium perniobate as raw materials, ammonium persulfate (APS) as initiator and N，N'-methylene bisacrylamide (MBA) as cross-linking agent. The structure and morphology were characterized by FT-IR, SEM and TG. The water retention rate, maximum water retention capacity and anti-evaporation performance of the polymer were measured. The content of KG, AA, AS, APS, MBA, and the effect of neutralization on the water absorption ratio were investigated. The destertification area was simulated, and the effect of superabsorbent polymer on soil water evaporation is measured. The results show that under the optimal synthesis conditions, the water absorption ratio of the polymer in deionized water, tap water and 0.9% NaCl (1110, 210 and 108 g/g, respectively) were higher than that of water retaining agent 1 and 2 and has a good Salt tolerance; within 12 h, water retention at 25 ℃,45 ℃ and 60 ℃ reached 54%, 14.4% and 8% respectively; The maximum water holding capacity was higher than water retaining agent 1 and 2 respectively ; Superabsorbent polymers could reduce soil water evaporation effectively.

Abstract:P(diacetone acrylamide-co-vinylamine) (P(DAAM-co-VAm)) was obtained from the hydrolization of P(diacetone acrylamide-co-N-vinylformamide) (P(DAAM-co-NVF)) which was synthesized by solution free radical polymerization of diacetone acrylamide (DAAM) and N-vinylformamide (NVF), using ammonium persulfate and sodium hydrogen sulfite as initiator. Fourier transform infrared spectrometer (FTIR), nuclear magnetic resonance spectroscopy (1H-NMR), gel permeation chromatography (GPC) and thermal gravimetry (TG) have applied to character the structure, composition and molecular weight of the resultant polymers. The phase transition behavior of the resultant P(DAAM-co-NVF) and P(DAAM-co-VAm) was evaluated by UV-Vis spectroscopy and differential scanning calorimeter (DCS). Experimental results showed that LCST of P(DAAM-co-NVF) and P(DAAM-co-VAm) solutions could be controlled by changing the composition of the polymer and concentration of the solution. Moreover, LCST of P(DAAM-co-VAm) solution could be tuned by bubbling CO2 into the system. LCST of P(DAAM-co-VAm) solution has reversible response to CO2 and N2 switching.

Abstract:The paper shows a new terbium (Ⅲ) complex OSNP@Tb3+ based on oxidized starch nanoparticles (OSNP), which can emit strong green fluorescence at 320 nm excitation wavelength. The furazolidone will especially behave the highest sensitivity and selectivity during detecting different antibiotics by using OSNP@Tb3+ as fluorescence probe. The luminescence intensity of OSNP@Tb3+ aqueous dispersion gradually decreases with the increase of furazolidone concentration. The luminescence can almost be quenched completely (quenching efficiency > 90%) at the concentration of 2.3 × 10-4 mol/L. OSNP@Tb3+ aqueous dispersion presents high quenching constant (Ksv = 1.919 × 104 (mol/L)-1, good linear relationship (R2 = 0.992) and low detection limit (1.67 × 10-6 mol/L) when it was used for detecting furazolidone.

Abstract:In order to improve the thermal decomposition performance of AP in solid propellants, CuO/Al composite catalyst was prepared by sol-gel method, and its morphology and structure were characterized by SEM, XRD and other means. The catalytic effect of the catalyst on the thermal decomposition of AP was investigated by DSC method.Results show that the CuO/Al composite catalyst structure is complete, and the catalytic effect of composite catalyst CuO/Al on AP is obviously better than that of mixture catalyst CuO/Al. The catalytic effects of CuO/Al composite catalysts with different mass fractions of 1%, 3% and 5% were compared. It was found that the low temperature decomposition peak and high temperature decomposition peak decreased by 24.2℃ and 120.2℃, respectively, when the addition amount was 5%.The results show that the prepared CuO/Al composite catalyst can significantly reduce the thermal decomposition temperature of AP and improve its thermal decomposition performance.

Abstract:An polyacrylate amphiphilic macromolecule (MBDA copolymer) was prepared using methyl methacrylate (MMA), butyl Acrylate (BA), acrylic acid (AA) and diacetone acrylamide (DAAM). The amphiphilic macromolecule was able to co-assemble with fluorescein in water to form water-based fluorescent emulsion (MBDA/FM co-assembled emulsion). The fluorescent shape memory material (MBDA/FM-ADH film) was obtained by mixing with adipic acid dihydrazide (ADH) and curing at room temperature, which can get a wide range of potential applications in the field of anti-counterfeiting, decoration and fluorescent probes. The method for preparing functional shape memory material by self-crosslinking emulsion at room temperature has the features of simple process, friend-environment, good controllability and suitable for large-scale production. The results showed that the particle size of the co-assembled emulsions remained at 100~200nm and the fluorescence intensity of emulsions increased with the amount of fluorescein within a certain range. The films which have dual functions of fluorescence and shape memory emitted uniform green fluorescence under ultraviolet light (em=514nm) and can recovery almost 100% under T≥ 70 ℃ （Tg=31.9 ℃).

Abstract:A simple liquid phase method was used to deposit ZnO nano-sheets and nano-flowers on the stainless steel mesh at room temperature. Then, the superhydrophobic stainless steel mesh was modified by the impregnation method with the low surface energy substance stearic acid. The surface morphology, crystal structure, wettability, wear resistance and oil-water separation performance of the deposited stainless steel mesh were characterized. The results showed that the surface of the stainless steel mesh was composed of micro-nano structure ZnO with nano-sheets and nano-flowers. It was superhydrophobic and had a water contact angle of 161 °. The oil-water separation efficiency was 98%, and the separation efficiency remained at 95.5% after 20 cycles of recycling. It had good mechanical wear resistance and showed chemical stability in high salt environment.

Abstract:Bamboo cellulose fiber (BCF) were degraded by three microbial strategies, pure Brevibacillus brevi (BB), microflora carried by BCF (HM) and a combination of BB and HM (HBB). The enzyme production and degradation functions of different strategies were investigated by shaking flask fementations. The BCF’s structure and microbial community composition of optimal treatment group at different stages during degradation were analyzed, which were assisted by the viscosity method in cupri-ethylene-diamine, XRD, FTIR and 16S rRNA high-throughput sequencing technologies. The results indicated that under the three microbial strategies, BCF showed a certain degradation effects, which dry matter loss rate were 41.92%, 60.74% and 77.65%, respectively, when the fermentation was finished. Compared with BB and HM groups, HBB systerm showed the main degrading period’s highest CMCase and laccase activity, as well as abundant xylanase activity. Early acquisition of structural characteristics, such as the substrate’s size reduced sharply, carbohydrate-lignin linkages destroyed and removed, as well as the defect in crystallization zone, was of benefit to the availability of enzymatic hydrolysis, which was an important reason for BCF’s degradation effectively and speedily. Bacterial species of HBB covered 18 phyla, 26 classes,64 orders, 97 families, 170 genera. Firmicutes, Proteobacteria, as well as Bacteroidota, Actinobacteriota,Verrucomicrobiota were the dominant phyla in HBB. There were significant differences between the main and late degrading periods in microbial species and relative abundance at genus level. Devosia, Ochrobactrum, Taibaiella, Brevundimonas had a relatively high relative abundance in the main degrading period than that of in the late stage, while Pseudoxanthomona, Cohnella, unclassified_o_Flavobacteriales were relatively abundant in the late degrading stage. PCoA and ANOSIM analysis at phylum and genera levels indicated that there were differences in community structure of HBB samples obtained from the two typical degrading periods, but no statistical signigicance. The results showed that HBB could accelerate the degradation of BCF and obtain a relatively high dry matter loss rate compared with BB or HM alone. HBB showed a certain stability and reliability during degrading. Brevibacillus、Devosia, Ochrobactrum, Taibaiella, Pseudoxanthomona, Azospirillum, Cellulomonas were the main functional species of HBB for BCF degradation in efficiency.

Abstract:Hepatocellular carcinoma targeted and pH-sensitive Ag2S loaded poly(lactic-co-glycolic acid (PLGA) nanoparticles (SP94—PLGA@Ag2S) were prepared by coprecipitation and chemical band combination method for near-infrared region Ⅱ fluorescence-guided surgical resection of hepatocellular carcinoma. The in vitro and in vivo experimental results showed that the nanoparticles tend leads to produce degradation under acidic conditions（pH6.5）, leading to the increase of the distance between Ag2S nanoparticles and the recovery of fluorescence（from 20% to 100%）. The degradation of the nanoparticles could realize the accurate differentiation between hepatocellular carcinoma tissues and normal tissues. In addition, the injection of nanoparticles with the assistance of near-infrared region (NIR) Ⅱ fluorescent surgical navigation equipment can effectively remove hepatocellular carcinoma, greatly prolong the lifetime （compared with the traditional surgery, the survival rate at 60 days after surgery increased from 40% to 90%） and postoperative life quality of tumor-bearing mice, and effectively reduce the postoperative recurrence rate.

Abstract:Styrene-isoprene-styrene block copolymer (SIS) can improve its physical and chemical properties and mechanical properties through catalytic hydrogenation, making it more widely used in industry. Here a simple chemical reduction method was employed for preparing Pt/g-C3N4 catalyst using chloroplatinic acid and urea as raw materials, and the influence of catalyst composition ,the amount of Pt and reaction conditions on the hydrogenation performance of SIS was investigated. The structure of catalysts and products was characterized by XRD, TEM, 1HNMR, DSC, etc. The results shows that Pt/g-C3N4 exhibits a superior activity with 85% hydrogenation degree of SIS and 95% selectivity to C==C bonds of isoprene units under the conditions of 140 ℃, 3 MPa, 2 h, with cyclohexane as solvent.

Abstract:A series of Co-N-C catalysts (Co/CNAA-T) were prepared successfully via the pyrolysis of precursor formed by N-acetyl-alanine modified chitosan and cobalt ion at different temperatures. Characterizations were employed to study the effect of pyrolysis temperature on the morphology, structure and composition of the Co-N-C catalysts. It is considered that the Co-Nx site is the catalytic activity center. The prepared Co/CNAA-T catalysts were applied in hydrogenation of methyl phenyl sulfoxide. Meanwhile, the effect of pyrolysis temperature on the catalytic hydrogenation performance of the catalyst was explored. Among them, Co/CNAA-900 shows the best catalytic activity at 140oC and 3MPa hydrogen pressure for 11 hours. The conversion rate reaches 97.2% and the selectivity is more than 99%.

Abstract:Dibutylfuran-2,5-dicarboxylate (DBF) was expected to be a new substitute for petroleum phthalate green plasticizer because of its chemical structure and physical properties similar to phthalate esters, good biocompatibility, and metabolism to human tricarboxylic acid cycle. In this study, the enzymatic synthesis process of bio-based plasticizer dibutylfuran-2,5-dicarboxylate was introduced. In toluene system, dimethyl 2,5-furandicarboxylate was esterified with butanol under the catalysis of lipase, and dibutyl 2,5-dicarboxylate was prepared. The synthesis process of dibutylfuran-2,5-dicarboxylate was optimized, and the effects of sugars and adsorbents as additives on the yield of enzymatic transesterification were discussed. The results showed that when the molar ratio of substrate was 1: 5, the dosage of Novozym435 was 0.005 g/ml, the reaction conditions was 45 ℃,180 r/min in 10 ml toluene solution, and the reaction time was 30 h, the yield of dibutylfuran-2,5-dicarboxylate was the highest. The addition of 4A molecular sieve could obviously promote the formation of dibutylfuran-2,5-dicarboxylate, and the addition of trehalose can also enhance the catalytic ability of lipase. The yield of dibutylfuran-2,5-dicarboxylate reached 87% after adding 0.2 g/ml 4A molecular sieve and 15% trehalose into the reaction system and reacting at 45℃ for 14 h.

Abstract:Mustard gas (HD) is the most widely used chemical warfare agent that is refractory and lethal. The new generation of MOFs material MOF-808 has been studied, which has a good degradation effect. However, the current research on the degradation of HD by MOF-808 is mostly used in powder form, which is easy to agglomerate and difficult to recycle. To solve this problem, this study uses electrospun polyacrylonitrile (PAN) to fix and recover MOF-808, and validates MOF- 808@PAN has excellent degradation effect on HD. The MOF-808@PAN nanofiber material was synthesized with ZrOCl2 and trimesic acid as raw materials, trifluoroacetic acid as a regulator, and template-free based on water as a solvent. The catalyst structure was characterized by SEM, XRD, FTIR, TG and nitrogen adsorption and desorption. The experimental results show that the MOF-808@PAN nanofiber has a specific surface area of 441.5m2/g. After 20 hours of exposure to 5μL of mustard gas simulant (CEES), 83.7% of CEES has been decomposed. Provide a new solution for HD degradation.

Abstract:In order to search for high activity acetylcholinesterase (AChE) inhibitors, thirteen 2H-thiazole[3,2-b][1,2,4]triazine-3,7-diones were synthesized from substituted benzaldehyde and N-Acetylglycine through five steps. The structures of the target compounds were confirmed by 1H NMR, 13C NMR and HRMS. Ellman method was used to test AChE inhibitory activity of the compounds at 10 μmol/L. The results showed that all the target compounds had inhibitory activity against AChE, and the compound 6-(4-methoxybenzyl)-2-(4-methoxybenzylidene)-2H-thiazolo[3,2-b]-1,2,4-triazine-3,7-dione (Ⅴk) had the best activity (80.1%). The binding mode of the compound Ⅴk and AChE was studied by molecular docking. The compound Ⅴk could bind to multiple catalysis sites of AChE. 2H-thiazole[3,2-b][1,2,4]triazine-3,7-diones could provide reference for the development of new AChE inhibitors with independent intellectual property rights.

Abstract:Ginkgo seed was used as raw foodstuffs to exact their proteins. The resulting ginkgo seed protein isolate (GSPI) was then subjected to pH-shifting treatments followed extreme acid (pH 2.0, pH 3.0, pH 4.0) or extreme alkaline (pH 10.0, pH 11.0, pH 12.0) by holding 2 h and then the pH was recovered to neutral. The solubility and emulsifying properties of pH-shifted GSPI were investigated. Upon the aqueous solutions (containing 0.5 mol/L NaCl), the physical and chemical analysis, spectroscopy and electrophoresis techniques were employed to detect the physical and chemical properties of the ginkgo protein solution to characterize the hydration properties, molecular components and structural modifications of the ginkgo protein isolate, as well as the aggregation behavior and emulsifying properties of the protein molecules, and investigate the effect of extreme acid and alkaline pH-shifting on protein structure and functionality thereof. The result indicated that extreme acid and alkaline pH-shifting processes cause the rise of protein hydrophobicity, sulfhydryl group content and fluorescence intensity, promotes protein unfolding, rearrangement and disclose their hydrophobic groups to form a disulfide-mediated aggregation, led to markedly improved solubility (particularly, the solubility is up to 31.91% from 13.42% of the control) and approximately 2-fold emulsion activity but decreased emulsion stability.

Abstract:A noval packaging material was prepared by adding tea polyphenol into chitosan/zein matrix and the solution casting method. The effect of tea polyphenol on the static and dynamic rheological properties, particle size and gel strength of blend solutions was investigated. And the mechanical and barrier properties of blend films were analyzed. Moreover, morphology, crystallography and thermomechanical analysis were performed. The results showed that the interaction of tea polyphenol and polymer matrix facilitated the formation of highly entangled network structure, which was benificial to the development of uniform blend films. It was apparent that the properties of films were improved by loading moderate tea polyphenol, and the tensile strength reached the highest value (10.966 Mpa) when the load of tea polyphenol was 1%. The results of SEM and XRD revealed the preferable miscibility among tea polyphenol, chitosan and zein on account of strong interaction. Furthermore, FT-IR showed that hydrogen bond interaction was observed between tea polyphenol and chitosan, zein. And the thermomechanical analysis demonstrated that blend films presented better heat stability when the mass fraction of tea polyphenol was 0.5% and 2% respectively.

Abstract:Cage-type octavinyloctasilsesquioxane (POSS-Vi), acrylamide (AM) and methacrylic acid (MAA) were used as raw materials to prepare amino and carboxyl POSS/polymer composites (P (POSS-AM-MAA)) by free radical polymerization. The structure and morphology of P (POSS-AM-MAA) were characterized by Fourier transform infrared spectroscopy, X-ray diffractometer, and transmission electron microscope. The results showed that: POSS/polymer composites were prepared, and the POSS cage structure was covered by polymer segments. P (POSS-AM-MAA) combined with 4% glutaraldehyde was used in the tanning process of pickled goat skin, and the influence of amino content, molecular weight and composite material dosage on the properties of leather was investigated. The results showed that the shrinkage temperature of the tanned leather was 83.7 ℃, and the thickening rate was 109.5% , which were both higher than glutaraldehyde tanned leather, when the amino content was 433μmol/g, the number-average molecular weight of P (POSS-AM-MAA) was 27237, and the amount of P (POSS-AM-MAA) was 8% of the weight of pickled goat skin.The free formaldehyde content in crust leather was 28.3 mg/kg. The tensile strength, elongation at break and the tear strength of combined tanned leather sample was 16.5 MPa, 109.5%, and 58.8 N/mm,which was similar to glutaraldehyde tanned leather.

Abstract:Modified amphoteric polyurethane can be used in the retanning process of leather tanned by organic chrome-free tanning agent because of it’s structure is similar to leather collagen polypeptide and showed good compatibility and reactivity when added into leather. However, most amphoteric polyurethane modifiers have a single function and are derived from non-renewable petrochemical resources, which are not environmentally friendly. Hence, a amphoteric polyurethane was obtained by using isophorone diisocyanate (IPDI) and polytetrahydrofuran diether alcohol (PTMG) as raw materials, 2,2-dimethylolpropionic acid (DMPA) as anionic chain extender, N-methyldiethanolamine (MDEA) as cationic chain extender, then the product (COWPU) is obtained by using castor oil (CO), which is environmentally friendly and has a softening effect on collagen fibers, to modify amphoteric polyurethane. The results showed that COWPU was successfully prepared. It also has significant amphiprotic characteristics (isoelectric point 6.29) and good biodegradability (BOD5/COD=0.37). Then it was applied to retanning of leather tanned by chrome-free tanning agent TWS. The results showed that the tear strength (36.32 N/mm) and tensile strength (9.99 Mpa) of the leather retanned by COWPU were better than the leather retanned by the commercially available amphoteric acrylic retanning agent. In addition, COWPU has a certain softening effect on leather, which has the potential to realize an integrated process of fatliquoring and retanning. This research can provide a matching amphoteric retanning agent for leather tanned by organic chrome-free tanning system.

Abstract:A silica/poly (octadecyl methacrylate-co-methyl methacrylate-co-butyl acrylate) (SiO2/P(SMA-co-MMA-co-BA)) resin was synthesized by suspension polymerization method to adsorb chlorinated hydrocarbons from wastewater. The effects of particle size of unmodified SiO2 and the dosage of modified SiO2 on the adsorption properties of the resin were investigated by single factor experiment. The structure and surface morphology of the material were characterized by FT-IR, interface parameters, SEM and BET. The results showed that the resin had strong adsorption selectivity for chlorinated hydrocarbon, and when the particle size of the unmodified SiO2 is 50 nm, the dosage of modified SiO2 is 1.5% of the total mass of acrylate monomer, the modified resin within 6 h of CH2Cl2, CHCl3, CCl4 and C2Cl4 could achieved 49.10, 56.41, 46.50 and 43.45 g/g, which was 62.91%, 49.23%, 42.86% and 54.08% higher than that of the unmodified resin. After 10 cycles of adsorption and desorption, the adsorption capacity of the modified resin for CHCl3 is still 50.30 g/g, and the regeneration capacity of the modified resin was 42.21% higher than that of the unmodified resin.

Abstract:An oil-soluble nanocomposite copolymer was prepared by free radical polymerization, using octadecyl acrylate, 4-vinylpyridine and acrylamide as monomers, azobisisobutyronitrile as initiator and toluene as reaction solvent, graft copolymerization with nano-silica. The nanocomposite copolymer can reduce the viscosity of heavy oil. The influences of monomer ratio, SiO2 mass ratio, viscosity reducer dosage, temperature and shear rate on viscosity reduction were investigated by single factor experiment. The performance of viscosity reducer is evaluated by the chenping heavy oil of shengli oilfield. The results show that nanocomposite copolymer is effective in reducing the viscosity of chenping heavy oil and superior to nano-SiO2 and EVA on the market. When the addition of viscosity reducer is 700 mg/kg, apparent viscosity reduction rate of heavy oil is 69.1%, and the net rate of viscosity reduction is 34.0%, under the test condition of 50 ℃, 10 s-1.

Abstract:The free radical solution polymerization method was used to synthesize acrylamide(AM)/itaconic acid(IA)copolymer IAPAM,its structure was characterized by FTIR,1HNMR,elemental analysis and GPC,and having evaluated the ability of the reducing viscosity of resisting monovalent and divalent cations and resisting redox substances. The experiment determined that the viscosity average molecular weight of IAPAM was as high as 1.716×107. The evaluation results of IAPAM salt resistance performance show that compared with Partially hydrolyzed polyacrylamide(HPAM),IAPAM has better resistance to monovalent and divalent cations to reduce viscosity. When the Na+/Ca2+ concentration is 30000mg/L and 500mg/L,the viscosity of IAPAM is respectively 196.8mPa·s and 161.56 mPa·s,the viscosity reduction rates were 22.44% and 35.51% respectively. The results of anti-oxidation and reduction substance evaluation experiments show that IAPAM has good resistance to degradation of Fe2+ and S2-. When the concentration of Fe2+/S2- is 10mg/L the viscosity reduction rate is 23.67% and 0.56%, respectively. The structure of the monomer IA is related. However, the complex stabilization effect of IAPAM on Fe2+ takes a certain amount of time. When the stable state of complexation is not reached,the oxidative degradation of the polymer by Fe2+ can still proceed.

Abstract:Silicone-containing acrylate pre-polymer (PDMS-g-HPMA) was prepared from hydroxylterminated poly (dimethysiloxane)(PDMS-OH), hydroxypropyl methacrylate (HPMA), 3-Isocyanatomethyl-3,5,5-trimerhylcyclohexy isocyanate (IPDI). Then, a series of silicone-containing modified acrylic resin polymers with different content of PDMS-g-HPMA were prepared with 2-Acetoxy-1-methoxypropane (PMA) as solvent and 2,2-azobis (2-methylpropionitrile) (AIBN) as initiator. Last, a series of waterborne acrylic resin dispersions were prepared by emulsification with N,N-dimethylethanolamine as neutralizer in the presence of water. The dispersions and coatings were characterized by FTIR, XPS, TGA, AFM and SEM. And the storage stability of the dispersions, the hardness, adhesion, water resistance and other properties of the coatings were test. The results showed that when PDMS-g-HPMA content was 4% (based on the total mass of polymerized monomers, the same below), the prepared dispersion had evenly distributed, right particle size (208.57nm) and better storage stability. The prepared coating had dense, transparent surface and exhibited good properties. The coating’s hardness was H, adhesion was grade 1 and water contact angle was 100.5?. Moreover, the prepared coating had excellent water and acid resistance.And the tensile strength of the coating was 15.6MPa and elongation at break reached 356%.The TGA analysis demonstrated that the temperature at which 10% mass loss of the coating reached 302.4℃.

Abstract:Using waste bamboo as raw materials, a semi-liquefied bamboo powder was prepared for the bonding of bamboo and wood boards under the action of a liquefaction aid formed by chromium-containing leather shavings (LS), hydrochloric acid and a small amount of phenol. Single factor experiment was used to investigate the influence of liquefaction time, liquefaction temperature, the dosage of LS and liquid-solid ratio on the effect of liquefaction. The difference of bamboo powder before and after semi-liquefaction was analyzed by FTIR, SEM and DSC. Under the conditions of 12% LS addition, a liquid-solid ratio of 5:1, and a microwave heating temperature of 150 ℃ for 15 min, the liquefaction rate of bamboo powder can reach 60.95%. The liquefaction rate proves that LS has a catalytic liquefaction effect on bamboo powder, and the prepared liquefied product can be used as a binder to prepare plywood to meet the category II plywood index in GB/T 9846-2015 "Ordinary Plywood". Therefore, it provides reference for the recycling utilization of two kinds of waste resources.is heated to the reaction temperature of 150 ℃ for 15 min. The liquefaction rate of bamboo powder reaches 60.95 %. It is proved that the chromium-containing leather shavings can catalyze the liquefaction of bamboo powders, and the liquefied product can meet the requirements of plywood adhesive, which provides a reference for the recycling utilization of two kinds of waste resources.

Abstract:Abstract: The surface epoxy nano SiO2 was prepared by sol-gel method using four tetraethyl orthosilicate (TEOS), sixteen alkyl three methyl ammonium bromide (CTAB), and gamma (2, 3- epoxprooxy) propyl trimethoxysilane (KH560) as raw materials. The ODA-SiO2 was prepared by affinity addition reaction of the primary amine end group of the eighteen amine (ODA) with the epoxy on the surface of the nano SiO2, and used for the preparation of waterborne epoxy. Anticorrosive coating. Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used to characterize the successful grafting of ODA onto SiO2 surface. The corrosion resistance of waterborne epoxy coating was analyzed by electrochemical test and salt spray resistance test. The results show that the waterborne epoxy coating containing 0.3 wt% ODA-SiO2 has good corrosion resistance and salt spray resistance time is 500h.

Abstract:In this paper, the basalt flakes were added to the epoxy coating to In this paper, the basalt flakes were added to the epoxy coating to improve its corrosion resistance. In order to prevent the agglomeration of basalt scale, the mechanochemistry modification process was adopted. The basalt flake was hybrid coated with tetraethyl orthosilicate, hy-311 titanate coupling agent and E-44 epoxy resin. The results showed that the settling time of basalt flakes increased from 2 h to 96 h by hybrid coating. The epoxy coating with 20% hybrid coated basalt flakes has the best performance, the adhesion is 13.40 MPa, and the salt spray resistance time is 2000 h, after immersed in 3.5% NaCl solution for 2000 h, the impedance modulus of 0.01 Hz still has 5.15×109 Ω·cm2.

Abstract:1-Methyl-glucose was obtained from δ-gluconolactone via three steps. δ-gluconolactone was protected by TMSCl firstly. Subsequently the addition reaction was employed to form TMS protected 1-methyl-glucose (Ⅱ), and then 1-methyl-glucose (Ⅲ) was obtained by hydrolysis of compound (Ⅱ) using acid cation exchange resin in acetonitrile solution. The target compound was confirmed by 1HNMR, 13CNMR and HRMS. The thermal pyrolysis behavior of 1-methyl-glucose was also investigated using on-line pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS).The results indicated that the compound (Ⅲ) synthesized was 1-methyl-α-D-glucose, and under these optimal conditions, the yield of compound (Ⅲ) was 86%. 1-Methyl-glucose could be transformed to corresponding glucoside easily in alcohol catalyzed by acid. The synthesized 1-methyl-glucose after pyrolysis could release 2-acetylfuran, 5-methyl-2-acetylfuran, 5-hydroxymethyl-2-acetylfuran and other aromatic components, which could be used in food, tobacco and other industries.

Abstract:2′,3′,5′-Tri-O-acetyl-6-chloropurine nucleoside was obtained from inosine via acetylation and chlorination. Then, 2′,3′,5′-tri-O-acetyl-6-chloropurine nucleoside was transformed into 2′,3′,5′-tri-O-acetyl-6-triphenylphosphonine nucleoside with triphenylphosphine. Finally, C—P bond was cleavaged in the presence of K2CO3, and acetyl groups were removed simultaneously. The product Nebularine was obtained in 4 steps and 62% overall yield. The effects of the formation and cleavage of C—P bond on the yields were investigated, and the optimized reaction conditions were obtained. The reaction scale could be expanded to 200 g. 6-Deuterated Nebularine was obtained in 76% yield from 2′,3′,5′-tri-O-acetyl-6-triphenylphosphonine nucleoside in deuterated water and deuterated methanol.