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Research Progress on Nanocellulose and Its Use in Lithium Batteries
Ying WANG, Chunhui MA, Jin ZHOU, Mengyang LI, Jinquan YUE
Chemistry and Industry of Forest Products    2021, 41 (6): 105-116.   DOI: 10.3969/j.issn.0253-2417.2021.06.014
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As a natural material with good biocompatibility and biodegradability, nano-cellulose has unique structure and excellent mechanical properties. It has been widely used in the construction of electrochemical energy storage system of lithium-ion batteries(LIBs), and has made significant progress. This thesis provided an overview of the preparation and modification methods of cellulose nanofibrils(CNF), cellulose nanocrystals(CNC) and bacterial cellulose(BC) in the context of the application of advanced energy storage devices LIBs and green materials nanocellulose, and reviewed the research progress on the application of nanocellulose in the field of LIBs. It was mainly divided into three aspects: first, nanocellulose-based flexible LIBs electrodes; second, carbon materials derived from nano cellulose as electrodes; third, nano cellulose derived battery separator. Finally, some problems in this field were analyzed, summarized and prospected.

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Research Progress in the Modification of Bio-based Poly(Ethylene 2, 5-Furandicarboxylate)
Xiaoqing LIN, Shunhui TAO, Lei HU, Xiaojie ZHENG, Xiaodong ZHANG, Yao LIU
Chemistry and Industry of Forest Products    2022, 42 (2): 125-136.   DOI: 10.3969/j.issn.0253-2417.2022.02.017
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With the depletion of petroleum resources and the increasingly serious white pollution, the preparation of bio-based poly(ethylene 2, 5-furandicarboxylate)(PEF) from lignocellulosic resources has become one of the research hotspots in the fields of biorefinery and green chemical industry. Compared with petroleum-based plastics, such as poly(ethylene terephthalate)(PET) and polycarbonate(PC), PEF not only has excellent thermal properties and mechanical strength, but also has more obvious advantages in gas barrier properties, which is considered as a perfect substitute for PET. However, PEF also has some drawbacks, including low elongation at break, dark color, difficult degradation and slow deep crystallization speed. Therefore, it is necessary to modify PEF before practical application. In this paper, the research progresses of PEF modification, including copolymerization, blending and other modification methods were reviewed. The effects of different diols or diacid modified monomers, catalyst types, reaction modes, additives on the properties of PEF were summarized, and the developing trend and application prospects of modified PEF were discussed.

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Preparation and Characterization of Hollow Mesoporous Silica Microspheres
Xiaolin HUANG, Jiaxin NI, Youqi HAN, Jiaheng LIU, Yuanyuan MIAO, Shiyan HAN
Chemistry and Industry of Forest Products    2022, 42 (1): 64-70.   DOI: 10.3969/j.issn.0253-2417.2022.01.009
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Hollow mesoporous silica microspheres SiO2-1 and SiO2-2 were prepared by sol-gel and hydrothermal synthesis using dichloride-N, N'-bis (3-hydrorosin loxy-2-hydroxypropyl) tetramethylenediamine (DHRT) as template agent and ethyl orthosilicate as silicon source.SEM, TEM, FT-IR, XRD and nitrogen adsorption-desorption were used to characterize SiO2-1 and SiO2-2.The results showed that silicon dioxide microspheres with amorphous structure were successfully prepared by both methods; the agglomeration phenomenon between silica particles gradually disappeared with the increase of the amount of template agent (0.1-1 g); SiO2-1 was mainly loose microsphere with patterns, and SiO2-2 was hollow microsphere with the wall thickness of 80-85 nm.The average particle size distributions of SiO2-1 and SiO2-2 prepared with different template dosages (0.3-1 g) were 0.22-0.33 μm and 0.34-0.41 μm, respectively.The morphology and particle size of SiO2-1-0.7 and SiO2-2-0.7 prepared by two methods exhibited good morphology and low particle size, with specific surface area of 561.52 and 463.41 m2/g, cumulative pore volume of 0.35 and 0.42 m3/g, and average pore size of 2.56 and 3.66 nm, respectively.Zeta potential analysis showed that the formation of SiO2 hollow mesoporous structure was mainly caused by the cooperative self-assembly process between the oligomer obtained by hydrolyzing polycondensation of ethyl orthosilicate and the template agent.

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Research Progress in High-value Utilization of Furfural Residue
Mengyu LI, Peng YANG, Chun CHANG, Zhiyong CHEN, Jiande SONG
Chemistry and Industry of Forest Products    2021, 41 (6): 117-126.   DOI: 10.3969/j.issn.0253-2417.2021.06.015
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Furfural residue is the biomass waste in the process of furfural industrial production. In this paper, the sources and composition characteristics of furfural residue are firstly introduced. On this basis, the researches of furfural residue in the fields of biomass energy, composite materials, fine chemicals and agricultural supplies are reviewed, and the research progress in various application fields is analyzed and summarized. Finally, according to the characteristics of furfural residue, the existing problems and challenges in the application of furfural residue are pointed out and the high-value utilization of furfural residue are also prospected.

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Research Progress in Preparation and Application of Lignin-based Porous Carbon Materials
Xinglong HOU, Wei XU, Junli LIU
Chemistry and Industry of Forest Products    2022, 42 (1): 131-138.   DOI: 10.3969/j.issn.0253-2417.2022.01.017
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Lignin is an amorphous, highly cross-linked polyphenol aromatic polymer with a wide range of sources and rich carbon content, and is suitable for the preparation of porous carbon materials. Using lignin to prepare porous carbon is an important way to solve the problem that lignin is difficult to be used efficiently. It can solve environmental pollution and realize resource utilization. This article mainly introduced the research status of the preparation of microporous activated carbon with lignin as carbon precursor by physical and chemical activation method and the preparation of mesoporous carbon materials by template method in recent years. The pore structure and morphology of porous carbon materials prepared by different methods were compared and analyzed, as well as their application progress in adsorption, catalysis and electrochemistry.

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Research Progress in Electrochemically Catalyzed Depolymerization of Lignin
Chunhui MA, Jifang ZHANG, Wei LI, Sha LUO, Shouxin LIU, Jian LI
Chemistry and Industry of Forest Products    2022, 42 (1): 110-122.   DOI: 10.3969/j.issn.0253-2417.2022.01.015
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In this article, the research progress of electrochemical technology of lignin depolymerization recently, including micro electrochemical expression of lignin depolymerization, types of catalysts, electrode materials and electrode mechanism of electrochemical reactor and other strategies, were reviewed. The frontier research of lignin depolymerization by electrochemical technology combined with ionic liquid catalysis system, biological enzyme catalysis system and photocatalysis technology were analyzed. The influences of electrode material and current density on electrocatalytic efficiency were summarized, and the challenges as well as the opportunities of the application of electrochemical technology were presented.

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Thermal Properties and Thermal Decomposition Kinetics of Tannic Acid
Yuxin LU, Lingang LU
Chemistry and Industry of Forest Products    2022, 42 (3): 83-89.   DOI: 10.3969/j.issn.0253-2417.2022.03.011
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Tannic acid(TA) is a kind of multi hydroxyl aromatic biomass. The thermal properties of TA were analyzed by thermogravimetric experiment, the carbonization process of TA was observed by muffle furnace heating experiment, the apparent activation energy was observed by KAS and Ozawa method, and the most probable function was determined by Satava method. Thermogravimetric analysis showed that TA entered the state of rapid weight loss at about 182 ℃; when the temperature reached 800 ℃, the carbon residue of TA in nitrogen atmosphere was 15.29%. In air atmosphere, the carbon residue was 1.97% due to the second rapid weight loss in the temperature range of 436-538 ℃. It was found in the macro carbonization experiment that TA would form an expanded carbon layer when heated. Among them, a hollow carbon layer appeared at 100-200 ℃, and a solid carbon layer was formed at 300-400 ℃, which had obvious expansion, integrity, compactness and good gloss. It had the potential to become a new carbon source in intumescent flame retardants. The results of thermal decomposition kinetics showed that the apparent activation energy of thermal decomposition of TA in nitrogen atmosphere was 494 kJ/mol, lgA was 111.32, and the most probable mechanism function of rapid weight loss stage was G(α)=[-ln(1-α)]1/n, n=0.105 3, and its thermal decomposition mechanism belonged to random nucleation and subsequent nucleation growth reaction.

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Directional Decomposition of Bamboo Powder in Bio-based Polar Aprotic Solvent/Aqueous p-Toluenesulfonic Acid Coupling Systems
Xiaoyan YIN, Tingting CAI, Chao LIU, Jianchun JIANG, Kui WANG
Chemistry and Industry of Forest Products    2022, 42 (1): 1-9.   DOI: 10.3969/j.issn.0253-2417.2022.01.001
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The effects of pretreatment with γ-valerolactone/p-toluenesulfonic aci aqueous solution coupling systemGVL/TsOH aq) an Cyrene/p-toluenesulfonic aci aqueous solution coupling systemCyrene/TsOH aq) on the chemical composition an enzymatic hyrolysis of maso bamboo were stuie. The results showe that the hemicellulose separation rates (SH) an lignin separation rate (SL) in GVL/TsOH aq system with 75 g/L TsOH an the solvent volume ratio of 4:1 were 98.5% an 98.4%, respectively, after pretreatment at 130℃ for 60 min, an the cellulose retention rate (RC) was 91.5%. In contrast, the Cyrene/TsOH aq system with 30 g/L TsOH an the solvent volume ratio of 0.8:1 was pretreate maso bamboo at 120℃ for 60 min, the RC was 87.3%, while the SH an SL were 85.5% an 79.4%, respectively. Characterization results of soli samples after pretreatment showe that after pretreatment with GVL/TsOH aq, the ense structure of lignocellulose of the samples was effectively estroye, an most of the amorphous hemicellulose an lignin were separate, with a crystallinity of 68.27%. Besies, the structure was closer to microcrystalline cellulose, an more free hyroxyl groups were expose, which was conucive to the subsequent enzymatic hyrolysis an saccharification process. The enzymatic hyrolysis results emonstrate that the glucose yiel of the soli sample obtaine by GVL/TsOH aq pretreatment (773 mg/g) was significantly higher than that of the sample obtaine by Cyrene/TsOH aq (306 mg/g), which was 19.3 times of that of bamboo. The two solvent systems coul be effectively recycle, an the separation rate of lignin an the retention rate of cellulose in GVL/TsOH aq system coul reach 90.3% an 91.5% respectively, an 94.8% of solvent coul be recovere after three cycles.

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Studies on Lignin-based Carbon Materials as Electrocatalysts of Fuel Cells Cathode Ⅰ: Pyrolysis Process of Modified Enzymatic Hydrolysis Lignin
Kainan JIN, Songlin ZUO, Youcai GUI, Baoshou SHEN
Chemistry and Industry of Forest Products    2021, 41 (6): 1-9.   DOI: 10.3969/j.issn.0253-2417.2021.06.001
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In order to prepare lignin-based high-performance electrocatalytic carbon materials for fuel cells, enzymatic hydrolysis lignin was used as raw material to prepare urea or melamine modified enzymatic hydrolysis lignin. TG and DSC were used to study the pyrolysis process of these three kinds of lignin. Meantime, lignin pyrolysis experiments were conducted by a vertical tube furnace at different pyrolysis temperatures. The yield of solid products was calculated, and the carbon, nitrogen, and hydrogen content of these solid products were tested by elemental analyzer. The results show that urea or melamine modified enzymatic hydrolysis lignin exhibit a significantly different pyrolysis process from unmodified enzymatic hydrolysis lignin. The pyrolysis of urea modified enzymatic hydrolysis lignin mainly take place in the temperature range of 180-360 ℃, and melamine modified enzymatic hydrolysis lignin in a narrower temperature range of 280-350 ℃. Although melamine is basically thermally decomposed at 400 ℃, melamine modified enzymatic hydrolysis lignin produce a carbon product with a nitrogen content of more than 10% at 900 ℃. Moreover, the yield of char derived from melamine-modified lignin is equivalent to that of unmodified lignin. Conclusively, the melamine modification produces a significant effect on the pyrolysis of lignin. Further comparative analysis revealed that melamine modification result into the formation of a large amount of nitrogen-containing organic compounds with high chemical activity during the lignin pyrolysis, which greatly increased the probability of secondary pyrolysis reactions of melamine modified lignin at a lower temperature, thus significantly affecting the yield and nitrogen content of the final solid products.

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Thermal Degradation Characteristics of Lignin Nanoparticles and Its Reaction Kinetics Analysis
Jie TIAN, Rui LOU, Xiangyu XUE, Hong ZHANG, Shubin WU, Huimin XU
Chemistry and Industry of Forest Products    2021, 41 (6): 97-104.   DOI: 10.3969/j.issn.0253-2417.2021.06.013
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DES-lignin was extracted from pine feedstock by using deep eutectic solvents(DES) at treatment temperatures of 100, 130, and 150 ℃, and the resultant DES-lignin samples with nano scale were labeled as L100, L130, and L150, respectively. The yields and elemental compositions of DES-lignin were determined, and the thermal degradation characteristics of nanoscale DES-lignin were studied by fast pyrolysis and thermogravimetric analysis(TGA). The results showed that the yields of L100, L130 and L150 were 33.53%, 81.02% and 82.62%, respectively, along with lower H/C molar ratio. DES treatment temperatures of pine wood had significant effect on the thermal degradation properties of lignin nanoparticles. With the increment of DES treatment temperature, the yields of biochar derived from DES-lignin pyrolysis gradually increased, and biochar obtained by fast pyrolysis at 700 ℃ had great high calorific value(30.97-31.96 MJ/kg) and homogeneous mesoporous. Besides, TG analysis indicated that the intense pyrolysis reaction of DES-lignin took place mainly ranged from the temperature of 200 to 500 ℃, the peak temperatures of the maximum weight loss rate occurred around 265 and 385 ℃, respectively. In addition, non-isothermal Coats-Redfern integration method was used to fit the reaction kinetics of DES-lignin pyrolysis, which demonstrated that DES-lignin pyrolysis was a secondary kinetic reaction in the main reaction temperature zone(200-450 ℃), and the obtained activation energy of L100, L130 and L150 pyrolysis ranged 51.52-52.13 kJ/mol during temperature from 200 to 300 ℃ as well as 32.65-49.25 kJ/mol during temperature from 330 to 450 ℃.

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Preparation of Boron and Nitrogen Co-doped Porous Carbon Derived from Sword Bean Shell and Its Electrochemical Performance
Lu LUO, Lingcong LUO, Jianping DENG, Tingting CHEN, Mizi FAN, Guanben DU, Weigang ZHAO
Chemistry and Industry of Forest Products    2021, 41 (6): 43-50.   DOI: 10.3969/j.issn.0253-2417.2021.06.006
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The high surface area activated carbon was produced firstly by a simple two-step process of carbonization and KOH activation using forestry and agricultural residues sword bean shells as precursor. Furthermore, the N and B co-doped hierarchical porous carbon was prepared by hydrothermal post-treatment process using ammonium pentaborate tetrahydrate(NH4B5O8·4H2O) as nitrogen and boron source. The scanning electron microscopy, transmission electron microscopy, nitrogen adsorption/desorption isotherm and inductive coupled plasma emission spectrometer were used to investigate the morphological, structural and chemical properties. Meanwhile, the electrochemical performance was tested by a three-electrode system. The results showed that the maximum specific surface area, total pore volume, and micropore volume of the doped activated carbons could reach 2 859 m2/g, 1.34 cm3/g, and 0.99 cm3/g, respectively. The boron and nitrogen contents were 3.27% and 2.60%. The B and N co-doped activated carbon materials possessed excellent rate performance. Due to the synergistic effect of heteroatoms doping and also appropriate texture properties, the maximum specific capacitances were 369 and 240 F/g at the current density of 1 and 20 A/g, respectively.

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Synthesis and Properties of a Rosin-based Anionic Surfactant
Shujing PANG, Hao CHEN, Binglei SONG
Chemistry and Industry of Forest Products    2022, 42 (1): 51-56.   DOI: 10.3969/j.issn.0253-2417.2022.01.007
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Using dehydroabietic acid (DA) and 6-aminocaproic acid as the raw materials, a rosin-based amino acid surfactant (R-6) was synthesized via reactions of chlorination, amidation and saponification reactions.The 1H NMR and 13C NMR signals of dehydroabietic acid were analyzed by using 2D NMR techniques, and the structure of the final product was also confirmed by 1H NMR and FT-IR.The solubility, surface tension and foam properties of R-6 were investigated.The results showed that at room temperature, R-6 showed excellent solubility of above 800 mmol/L in water.The critical micelle concentration (Ccmc) of the surfactant was 5.89 mmol/L, and the surface tension (γcmc) corresponding to Ccmc was 40.46 mN/m.With the increase of surfactant concentration, R-6 exhibited strong ability in stabilizing foams.When the concentration of R-6solution was 10 mmol/L, the foam half-life was as high as 1 966 min.

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Preparation of Copper Loaded Activated Carbon and Its Adsorption Performance of Gaseous Benzene
Zhou XU, Wei LI, Shouxin LIU
Chemistry and Industry of Forest Products    2022, 42 (3): 1-9.   DOI: 10.3969/j.issn.0253-2417.2022.03.001
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The modified coconut shell activated carbons were prepared by loading CuCl2, carbonization and CO2 activation. The Cu-loaded activated carbons were labeled as AC3, AC4, AC5, and AC7 to represent the mass fractions of cupric salt solutions 0.3%, 0.4%, 0.5% and 0.7%, respectively. The Cu-loaded activated carbons were characterized by means of N2 adsorption isotherm, SEM, XRD and XPS. Their dynamic adsorption-desorption performance was measured by the gravimetric method. After modification, the acidic oxygenated groups on the surface of activated carbon decreased. The results showed that cupric salt existed in two forms, i.e., CuO and Cu2O. It was found that the presence of Cu loading led to the decreasing of surface area and pore volume of modified sample, and the increasing of the surface area and proportion of micropore. AC5 showed the largest values of the surface area(733.20 m2/g) and proportion(72.99%) of micropore. Furthermore, AC5 had the optimal equilibrium adsorption capacity(356.40 mg/g) which increased by 33.38% compared to the raw sample, and the optimal equilibrium adsorption time(118.80 min) which increased by 33.38%. Moreover, the adsorption performance of AC5 was better than the activated carbons in the organic gas filter cartridge(3M-3301 CN and 3M-6001 CN). After five cycles of adsorbents regeneration test, 80% of adsorption capability was still able to be reserved. The Cu-loaded activated carbons improved the adsorption performance by transforming the style from physical adsorption to physical-chemical adsorption through complexation of π-bonds in benzene with hollow d-orbitals in Cu2+.

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Pyrolysis Behavior Analysis of Enzymolysis Lignin Based on TG-FTIR-MS Technology
Xinglong HOU, Xiaopeng JIAN, Wei XU, Qi GUO, Junli LIU
Chemistry and Industry of Forest Products    2021, 41 (6): 36-42.   DOI: 10.3969/j.issn.0253-2417.2021.06.005
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The thermogravimetric analysis of enzymolysis lignin(EL) and phosphoric acid impregnated enzymolysis(EL-P) lignin was carried out at constant heating speed and variable heating speed to simulate the preparation conditions of activated carbon and provide a theoretical basis for analysis. The constant heating speed thermogravimetric experiments found that the EL pyrolysis process mainly occurred at 300-360 ℃, the EL-P pyrolysis temperature was advanced, which proved that phosphoric acid would interact with EL at low temperature. Variable heating speed increased the pyrolysis reaction time of lignin. The main weight loss peaks in the constant-rate heating process of EL split into two weight loss peaks, and the pyrolysis of lignin was more complete. The residual amount of EL-P pyrolysis products was reduced from 57.42% at the constant heating speed to 39.93% at the variable weating speed. Compared with constant speed pyrolysis, variable speed pyrolysis added the constant temperature process, the final pyrolysis residue decreased, more substances were released as gas, which indicated that the pyrolysis reaction was more sufficient. It verified the necessity of holding a constant temperature for a period of time during the impregnation and activation stages of the activated carbon preparation process. The chemical analysis of the released components showed that the pyrolysis of ligin mainly included CO, CO2, CH4, methanol, propionaldehyde and aromatic compound and so on. After H3PO4 impregnation, the content of pyrolysis products of EL-P reduced and the components were roughly the same.

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Preparation and Electrochemical Properties of Bamboo Based Ultra-thick Carbonaceous Electrode Materials
Tingting YU, Zongze LYU, Xiang LI, Jindong HU, Peiyan LI, Zhiguo LI
Chemistry and Industry of Forest Products    2022, 42 (2): 10-18.   DOI: 10.3969/j.issn.0253-2417.2022.02.002
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The 2.5 mm bamboo charcoal ultra-thick electrode material was prepared by direct carbonization of bamboo which preserved its straight pore structure. The bamboo charcoal materials Z-700, Z-800, and Z-900 were prepared at 700, 800 and 900 ℃, which were characterized by SEM, XPS, Raman spectra analysis. The results showed that the original bamboo structure was maintained after carbonization. Among them, the carbonized sample Z-900 owned a higher BET specific surface area(SBET) of 483 m2/g, total pore volume(Vtotal) of 0.23 cm3/g, mesoporous pore volume(Vmes) of 0.05 cm3/g, and micropore volume(Vmic) of 0.18 cm3/g. Electrochemical performance tests showed that the specific capacitance of the prepared ultra-thick bamboo charcoal electrode Z-900 was as high as 22.0 F/cm2 in the 6 mol/L KOH electrolyte with the current density of 10 A/m2. When the current density was 200 A/m2, the specific capacitance still reached 14.5 F/cm2 and the capacitance retention rate was 65.9%. The symmetric supercapacitor Z-900//Z-900 assembled with ultra-thick bamboo charcoal electrode Z-900 owned a specific capacitance of 14 F/cm2 at the current density of 10 A/m2, which had a discharge time of 3 500 s, an energy density of 4.9 W·h/m2, and a power density of 5 W/m2. At the current density of 100 A/m2, the coulomb efficiency could reach 99.8% after 10 000 cycles, and the capacitance retention was 88%, which demonstrated that Z-900 had an excellent electrochemical stability.

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Preparation and Performance of Bio-based Intrinsic Flame-retarding Epoxy Resin
Zheng PAN, Zhuo LI, Caiying BO, Guodong FENG, Xiaohui YANG, Lihong HU
Chemistry and Industry of Forest Products    2022, 42 (1): 71-78.   DOI: 10.3969/j.issn.0253-2417.2022.01.010
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The epoxy monomer 1, 3, 3'-tri-oxirane-2'-methoxy-benzophenone(DEBP) was synthesized with vanillic acid, m-diphenol, epichlorohydrin and so on as raw materials by simple two-step method. And DEBP was structurally characterized and determined via FT-IR, and was then mixed with 4, 4'-diaminodiphenylsulfone(DDS), followed by heating and curing to obtain DEBP/DDS epoxy resin. For comparative purpose, commercially used diglycidyl ether of bisphenol A(DGEBA) was cured with the identical curing agent was used as a control. The results showed that DEBP monomer had higher curing activity than that of DGEBA monomer. The glass transition temperature of DEBP/DDS epoxy resin was 183℃, which was higher than that of DGEBA/DDS. The DEBP/DDS epoxy resin outperformed DGEBA/DDS epoxy resin in terms of flexural and tensile properties. The flexural modulus and strength of DEBP/DDS epoxy resin were measured as 2 437.8 and 98.6 MPa and the tensile modulus and strength of DEBP/DDS were 2 523.4 and 71.1 MPa. The cured DEBP/DDS also demonstrated excellent flame retardant property. The char residue at 800℃ reached 35%, the limiting oxygen index(LOI) was 34%, the UL 94 level was V-0 and the total heat release was measured as 17.8 kJ/g. This research suggested that without indroducing any flame retardant element, an intrinsic flame-retarding epoxy resin was synthesized with bio materials.

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Synthesis of Allyl Modified Lacquer and Its Characteristics of UV/Oxygen Curing
Jian CHEN, Guomin WU, Shuping HUO, Zhenwu KONG
Chemistry and Industry of Forest Products    2022, 42 (2): 1-9.   DOI: 10.3969/j.issn.0253-2417.2022.02.001
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The allyl ether modified lacquer(AGE-L) was successfully prepared by the reaction of lacquer with allyl glycidyl ether(AGE), and subsequently reacted with methacrylic anhydride(MAA) to form a novel lacquer-based monomer with ether bond and ester bond(MAA-AGE-L). Their structures were then characterized by FT-IR, 1H NMR and 13C NMR, and their physical and chemical properties were tested. Additionally, the UV and oxygen(air) curing processes of raw lacquer, AGE-L and MAA-AGE-L were investigated, and the mechanical properties as well as the resistances to chemical media of the cured films were also studied. The results confirmed the successful synthesis of AGE-L and MAA-AGE-L, which were all brownish red liquids. The hydroxyl value of AGE-L was 193 mg/g, the iodine value was 1.89 g/g and the viscosity was 400 mPa·s. The hydroxyl value of MAA-AGE-L was 20 mg/g, the iodine value was 1.39 g/g and the viscosity was 2 000 mPa·s. Compared with lacquer, the surface drying time of MAA-AGE-L was shortened from 2 h to 50 min in presence of the oxygen(air) environment at 30 ℃ with the relative humidity of 80%, and the UV curing surface drying time was shortened from 50 s to 10 s. The pencil hardness of the cured film was H when AGE-L was irradiated by ultraviolet light for 120 s, whereas the pencil hardness of the paint film cured under oxygen(air) for one week was 2H. Moreover, they exhibited good adhesion, flexibility and impact strength. Allyl-modified lacquer films obtained by two curing methods had good water resistance, ethanol resistance, salt water resistance and acid resistance.

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Preparation of Biomass-derived Fe-N-C Porous Carbon Material and Its Catalytic Reduction of Nitrobenzene
Xing LIU, Zhu YIN, Beili LU, Fengzhen WU, Biao HUANG
Chemistry and Industry of Forest Products    2022, 42 (2): 63-70.   DOI: 10.3969/j.issn.0253-2417.2022.02.009
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Fir sawdust, urea and FeCl3·6H2O were mixed thoroughly at a mass ratio of 1∶[KG-*9]1∶[KG-*9]2 to generate the nitrogen doped porous carbon materials loaded with iron(Fe-N-C) after annealing the mixtures at the temperature of 700-1 000 ℃. The elemental composition, structure and surface properties of the obtained carbon materials at different temperatures were analyzed. Following that, the catalytic performance of the reduction of nitrobenzene were investigated. The results showed that the carbonization temperature had a significant effect on the iron and doped nitrogen species. At 700 ℃, the iron species in Fe-N-C-700 were mainly Fe3O4, whereas the nitrogen species were mainly pyridinic-N and pyrrolic-N. As the temperature rose, the iron species became mostly metallic iron, and a portion of the pyridinic-N was changed to graphitic-N. When the temperature was 900 ℃, the manufactured porous carbon material(Fe-N-C-900) had a Fe content of 43.42% and a N content of 2.19%, of which the graphitic-N was 37.7%, pyridinic-N was 23.8%, pyrrolic-N was 22.9% and oxidized-N was 15.6%. When the reaction duration was 2.5 h at 55 ℃. The conversion and selectivity of catalytic reduction of nitrobenzene were close to 100%.The high catalytic performance of Fe-N-C-900 might be due to the synergistic effect between the high content of iron species and graphite nitrogen formed during the calcination process. When Fe-N-C-900 was used for catalytic reduction of nitroarenes with electron-donating substituents such as methyl, amino or hydroxyl group, the corresponding products might be produced with high conversion and selectivity. In additon, when the nitroarenes contained electron-withdrawing substituents such as chlorine or iodine group, the reaction time must be extended to 4 h, and the conversion rate could reach up to 97.3% with the product selectivity above 99%. It indicated that Fe-C-N-900 had good universality for various substrates. And the catalyst had good stability and magnetic recyclability. After 5 times of recycling, the catalytic performance did not decrease obviously, the nitrobenzene conversion remained at 98.3% with the selectivity of 96.5%.

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Cross-linked Acrylic Emulsion and Its Application in Decorative Paper
Gaowei FU, Wanglong FENG, Dingkun WANG, Riqing CHEN, Chunpeng WANG
Chemistry and Industry of Forest Products    2021, 41 (6): 57-66.   DOI: 10.3969/j.issn.0253-2417.2021.06.008
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The acrylic emulsion adhesive was prepared by semi-continuous seed emulsion method with using acetoacetoxyethyl methacrylate(AAEM) as the crosslinking agent. The effects of AAEM amount on acrylic emulsion polymerization and its application as an adhesive for the decorative paper were investigated by infrared spectrometer, differential scanning calorimeter, thermogravimetric analyzer, scanning electron microscope, universal material testing machine, etc.. The IR results showed that AAEM was successfully participated in the emulsion copolymerization reaction. The particle size and viscosity of the acrylate emulsion modified by AAEM were below 90 nm and 21.0 mPa·s, respectively, and the monomer conversion rate was above 97% and the crosslinking degree of the film obtained from acrytic emulsion reached 90.61%. The modification of AAEM improved the crosslinking degree, thermal stability and water resistance of the obtained acrylate polymer. The impregnation test of the impregnated paper verified that the acrylic emulsion was successfully impregnated into the decorative papers, and greatly improved their mechanical properties, surface bonding strength, surface water resistance. The volatile content and pre-curing degree of the impregnated paper prepared by cross-linked acrylic emulsion, basically maintained at 12%-15% and 62%-65% when it was dipped; the tensile strength and elongation at break were up to 25 MPa and 26.9%, respectively, which were increased by 13 MPa and 25.1% while compared with that of the controlled sample. And the maximum contact angle was 113° and the surface bonding strength reached 0.826 MPa.

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Research Progress on Application of Rosin and Its Derivatives in Inorganic Functional Materials
Tong LIU, Yuxuan DONG, Wanting GU, Bing HAN, Chunrui HAN
Chemistry and Industry of Forest Products    2022, 42 (1): 123-130.   DOI: 10.3969/j.issn.0253-2417.2022.01.016
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Rosin is an important biomass resource in China, and its main component resin acid contains tricyclophenylene skeleton strong hydrophobic rigid group and carboxyl weak hydrophilic group. Rosin can be used to disperse inorganic nano materials and reduce the aggregation of inorganic nano materials. The surfactant with excellent hydrophilic and lipophilic properties can be obtained by chemical modification of acid double bond and carboxyl group of rosin resin, which has better "fusion" with inorganic materials. Rosin based surfactant can be used as template and dispersing agent to prepare a variety of inorganic functional materials. The rosin based small molecule/inorganic hybrid materials and rosin modified polymer/inorganic hybrid materials can be obtained by designing functional rosin derivatives to bond with inorganic materials. Based on the structural characteristics and chemical properties of rosin and its derivatives, the application of rosin and its derivatives in inorganic functional materials was reviewed, and the application prospect of rosin derivatives in the development of inorganic functional materials was prospected.

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