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SSRN 2023年

作者： Li, Mingfu Feng, Sufei Min, Douyong Zhang, Pingjun Huang, Junsheng Zhang, Jian Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Zhejiang Ningbo315201 China Institute of Biological and Medical Engineering Guangdong Academy of Sciences Guangdong Guangzhou510316 China Guangxi University College of Light Industry and Food Engineering Guangxi Nanning530004 China Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Zhejiang Ningbo315201 China University of Chinese Academy of Sciences Beijing100049 China

A series of novel bifunctional biomass-derived carbon catalysts for the conversion of glucose to 5-hydroxymethylfurfural (HMF) and formic acid (FA) were designed and prepared by a simple method. The aluminum-modified bifunctional carbon catalyst was the most effective catalyst, which could simultaneously convert glucose into HMF and FA with yield of 64.6% and 18.6%, respectively. Al3+ sites generated via a post-synthetic modification to enhance Lewis–Brønsted acidity of carbon catalysts, thereby promoting the conversion of glucose to HMF and FA. The establishment of kinetic models indicated that the formation of HMF from fructose is superior to levoglucosan, the direct formation of FA from glucose is superior to fructose, levoglucosan and HMF when Brønsted or tandem Brønsted/Lewis’s acid sites are present. Synergistic effect of Brønsted and Lewis sites promoted the protonation and rehydration of glucose intermediates resulting in the cleavage of C1 in glucose to release FA. This work will help to identify a promising method for converting biomass to biofuels. © 2023, The Authors. All rights reserved.

关键词： Formic acid

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Improvement in Toughness of Poly(ethyiene 2,5-furandicarboxyiate) by Melt Blending with bio-based Polyamidel 1 in the Presence of a Reactive Compatibilizer

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Chinese Journal of Polymer Science 2020年第10期38卷 1099-1106,I0006页

作者： Yong Yang An-Ping Tian Ya-Jin Fang Jing-Gang Wang Jin Zhu Key Laboratory of Bio based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Weihai Honglin Electronic TechnologyCO LTDWeihai 264205 China

The objective of this study was to improve the toughness of bio based brittle poly(ethylene 2,5-furandicarboxylate)(PEF)by melt blending with bio based polyamide11(PA11)in the presence of a reactive multifunctional epoxy compatibilizer(Joncryl ADR-4368).The morphological,thermal,rheological,and mechanical properties of PEF/PA11 blends were *** with neat PEF,the toughness of PEF/PA11 blend was not improved in the absence of the reactive compatibilizer due to the poor compatibility between the two *** Joncryl was incorporated into PEF/PA11 blends,the interfacial tension between PEF and PA11 was obviously reduced,reflecting in the fine average particle size and narrow distribution of PA11 dispersed phase as observed by scanning electron microscopy(SEM).The complex viscosities of PEF/PA11 blends with Joncryl were much higher than that of PEF/PA11 blend,which could be ascribed to the formation of graft copolymers through the epoxy groups of Joncryl reacting with the end groups of PEF and PA11 molecular ***,the compatibility and interfacial adhesion between PEF and PA11 were greatly improved in the presence of *** compatibilized PEF/PA11 blend with 1.5 phr Joncryl exhibited significantly improved elongation at break and unnotch impact strength with values of 90.1%and 30.3kJ/m2,respectively,compared with those of 3.6%and 3.8 kJ/m2 for neat PEF,*** work provides an effective approach to improve the toughness of PEF which may expand its widespread application in packaging.

关键词： Poly(ethylene 2.5-furandicarboxylate) Polyamide11 bio based polymers Reactive compatibilization Toughening

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Intrinsically flame-retardant and biodegradable DDP-based adhesives for wet environments

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Chemical Engineering Journal 2025年 515卷

作者： Jiang, Qi Hu, Han Sun, Jinhao Cao, Weihong Luan, Qingyang Zhu, Hanxu Chen, Weiqi Liang, Peng Wang, Jinggang Zhu, Jin Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China University of Chinese Academy of Sciences Beijing100049 China

Adhesives have been increasingly utilized in multifaceted applications, such as furniture, electrical appliances, and buildings. Currently, in addition to fundamental requirements for high adhesiveness, there are increasing demands for environmental sustainability, flame retardancy, and high-performance in extreme conditions. (6H-dibenz[c,e][1,2]oxaphosphorin-6-ylmethyl)-p-oxide-butanedioic acid (DDP) is selected to be incorporated into the Poly(butylene adipate-co-terephthalate) (PBAT) backbone, enabling the synthesis of a novel adhesive (poly(butylene adipate-co-terephthalate-co-phosphaphenanthrene) (PBATDn). Due to the π-π stacking of DDP, PBATD20 exhibits an extremely high adhesion strength of 11 N/cm. Owing to the hydrophobicity of the aromatic ring and the insensitivity of π-π stacking to water, PBATD20 maintains a high adhesion even after being immersed in water for 15 days, thus meeting the requirements for wet-environment applications. In addition to meeting the demand for adhesives, PBATD20 has been shown to reduce the potential fire risk. DDP releases phosphorus-oxygen free radicals to capture the ·H or ·OH radicals generated by polymer burning, effectively inhibiting the burning process. PBATD20 leaves some compact char residues that act as barriers to slow down the transfer of heat, oxygen, and combustible gases, showing excellent flame retardancy. Furthermore, PBATD20 exhibits a superior biodegradation capacity in Candida antarctica lipase B (CALB) at 37 ℃ compared with PBAT, thus reducing environmental pollution. PBATD20 is considered highly suitable for diverse applications in daily production and consumer use, including degradable packaging adhesion, electronics assembly, and the bonding of environmentally friendly building materials. © 2025 Elsevier B.V.

关键词： System-on-package

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Polyether-polyester and HMDI based Polyurethanes:Effect of PLLA Content on Structure and Property

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Chinese Journal of Polymer Science 2019年第11期37卷 1152-1161页

作者： Lei Shi Ruo-Yu Zhang Wu-Bin Ying Han Hu Yu-Bin Wang Ya-Qian Guo Wen-Qin Wang Zhao-Bin Tang Jin Zhu Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China School of Material Science and Chemical Engineering Ningbo University Ningbo 315211 China

Thermoplastic poly(ether-ester-urethane)s were synthesized from poly(L-lactide) diols (PLLA diols), polytetrahydrofuran diol (PTMG diols), 4,4'-dicyclohexylmethane diisocyanate (HMDI), and 1,4-butanediol (BDO) by a two-step reaction, and the morphology and property of the resultant TPU could be adjusted by varying the PLLA contents. The soft segment was composed of PLLA and PTMG diols. By controlling the percentage of PLLA in the soft segment, the glass transition temperature and mechanical properties of the polyurethanes could be regulated. based on the FTIR spectrum, we found that two kinds of hydrogen bonding existed individually in soft matrix and hard domain. The hydrogen bonding in soft matrix was unstable, which could be destroyed during elongation. With in situ stretching WAXS and SAXS experiments, we found that the PLLA crystal was destroyed and the PLLA domain oriented along the stretch direction. Finally, we proposed a schematic model to illustrate the microstructures of these elastomers before and after stretch.

关键词： Poly(L-lactide) diol Polyurethane Mechanical property Hydrogen bonding

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bio-based poly(butylene furandicarboxylate)-b-poly(ethylene glycol) copolymers: The effect of poly(ethylene glycol) molecular weight on thermal properties and hydrolysis degradation behavior

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Advanced Industrial and Engineering Polymer Research 2019年第4期2卷 167-177页

作者： Hu, Han Zhang, Ruoyu Kong, Zhengyang Wang, Kai Ying, Wu Bin Wang, Jinggang Zhu, Jin Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences NingboZhejiang315201 China University of Chinese Academy of Sciences Beijing100049 China

Poly (butylene furandicarboxylate) based poly (ether ester), with poly (ethylene glycol) (PEG) molecular weight from 600 to 20 K g mol−1 and mass fraction of hard segments fixed at 50%, are synthesized through transesterification and melt polycondensation. When Mn (PEG) is less than 1500 g mol−1, the copolymers tend to be homogeneous. The tendency of microphase separation is facilitated by the increasing Mn (PEG). The mechanical properties and water swelling are influenced by Mn (PEG), equilibrium water-uptake and PEG crystals. Elastic modulus of samples with no PEG crystals vary from 34 to 64 MPa, with elongation at break exceeding 1000%. The hydrolytic degradation is strongly affected by Mn (PEG), degradation medium and alkalinity. The degradation of copolymers with short PEG (−1) could be accelerated by ions and increasing alkalinity in medium. For copolymers with Mn (PEG) from 2 K to 6 K g mol−1, the degradation rate is relatively slow, due to relatively long PBF segments and improved PBF crystals hindering the hydrolysis of ester bond. For copolyesters of PBF50-PEG10K and 20 K, the oxidation of PEG dominates the degradation behavior while the PBF segments can hardly be damaged. The drastic degradation of these samples takes place in the solutions of pH = 12, suggesting the high alkalinity can break the long PBF segments. The distinct degradation behavior of the copolymers conduces to realize tuned hydrolysis for different biomedical applications. © 2019 Kingfa SCI. & TECH. CO., LTD.

关键词： Polyethylene glycols

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Effect of Adsorption of ZrO2 in Catalysts on the Efficiency of Hydrolysis of Cellulose to Sugar in Aqueous System under Microwave Radiation

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Chinese Journal of Chemistry 2020年第4期38卷 399-405页

作者： Ying Qiao Lixin Feng Zhongqiu Li Zhenyu Zhang Jing Chen Haining Na Jin Zhu Lai Chen Department of Polymer College of Material Science and EngineeringShanghai UniversityShanghai 200444Chino Key Laboratory of Bio-based Polymeric Materials of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboZhejiang 315201China Chemical College Shijiazhuang UniversityShijiazhuangHebei 050035Chino Hebei Building Ceramics Engineering Research Center Shijiazhuang UniversityShijiazhuangHebei 050035Chino

Summary of main observation and conclusion Five types of ZrO2 are used to simply establish an effective aqueous catalytic system with sulfuric acid for the hydrolysis of cellulose to sugar,*** adjusting surface roughness and particle size of ZrO2 dfferent adsorption is ***,following the thought to inhibit the self-aggregation nature of cellulose,after the introduction of ZrO2 with adsorption in catalysts,the efficiency of the hydrolysis of cellulose to sugar is *** results show different ZrO2 can produce different effects during the hydrolysis of the cellulose with rela-tively low *** the optimal conditions,the conversion of cellulose and TRS yield reaches 95.5%and 93.6%,*** this re-search,it reveals the critical point to organize a feasible and useful way for the hydrolysis of cellulose to sugar with high efficiency in an aqueous *** important theoretical and technical support is also provided for the conversion and utiliation of cellulose in the future.

关键词： hydrolysis sugar adsorption

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Chemical interactions between polyamide 66 and phosphorus flame retardants

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Polymer Degradation and Stability 2025年 240卷

作者： Zheng, Zixuan Yao, John Lou Yao, Qiang Zhejiang University of Technology Zhejiang Hangzhou310032 China Ningbo Hanvos Kent School Zhejiang Ningbo315202 China Key Laboratory of Bio-Based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Zhejiang Ningbo315201 China University of Chinese Academy of Sciences Beijing100049 China

To elucidate chemistry taking place during thermal degradation of polyamide 66 in the presence of phosphorus flame retardants and understand how commonly used phosphorus flame retardants achieve their flame retardancy, PA66 and a series of model compounds which include N,N'-dibutylhexanediamide, 1-butylazepane-2,7-dione and 1,8-diazacyclotetradecane-2,7‑dione have been subjected to thermal treatments together with melamine polyphosphate, aluminum diethylphosphinate or their combination respectively. Analyses of degradation products indicate that aluminum diethylphosphinate accelerates a cyclization reaction but does not change degradation mechanisms of polyamide 66 and its model compounds while melamine polyphosphate significantly shifts their degradation pathways to dehydration via a modified Hofmann elimination reaction which produces adiponitrile and water. Adiponitrile intumesces strongly when heated with polyphosphoric acid. Water hydrolyzes amides to amines, accompanied by the formation of amino-6-oxohexanoic acid which cyclizes to cyclopentanone. Water and amines together convert aluminum diethylphosphinate to diethylphosphinic acid. On the basis of the identification and transformation of reactive species, modes of flame retardant action of the combination of aluminum diethylphosphinate and melamine polyphosphate for PA66 have been proposed. © 2025 Elsevier Ltd

关键词： Dehydration

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Acid-Triggered, Degradable and High Strength-Toughness Copolyesters: Comprehensive Experimental and Theoretical Study

SSRN

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SSRN 2022年

作者： Tian, Ying Li, Jiayi Hu, Han Chen, Chao Li, Fenglong Ying, Wu Bin Zheng, Linjie Zhao, Yi-Lei Wang, Jinggang Zhang, Ruoyu Zhu, Jin Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhenjiang 315201 China University of Chinese Academy of Sciences Beijing100049 China Institute for Chemical Research Kyoto University Uji Kyoto611-0011 Japan State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic & Developmental Sciences School of Life Sciences & Biotechnology Shanghai Jiao Tong University Shanghai200240 China Department of Chemistry and Biochemistry University of California Los AngelesCA90095 United States

With the acceleration of the commercialization of degradable polymers, their poor mechanical properties continuously limit their applications. It is important to find a balance between the degradable properties and mechanical properties. Herein, poly(butylene terephthalate) (PBT) modified by SPG from 10% to 40 mol% were synthesized through a two-step polycondensation. Chemical structures, thermal properties, mechanical properties, viscoelastic behavior and degradation of poly(butylene terephthalate-co-spirocyclic terephthalate) (PBST) were investigated. The SPG could toughen the copolyesters and the elongation at break of PBST20 was up to 260%. Moreover, the introduction of SPG enables to hold an acid-triggered unit in the main chain. PBSTs copolymers maintain stable structures in a neutral environment, and the degradation under acid conditions will be unlocked. As tailoring the content of SPG, the degradable rate of the chain scission in response to acid stimuli will be adjusted. The acid degradation was proved to be occurred at the SPG units in the amorphous phase by DSC, XRD, GPC and 1 H NMR tests. After the acid degradation, the hydrolysis rate will also be accelerated, adapting to the requirements of different degradation schedules. The plausible hydrolytic pathways and mechanisms were proposed based on Fukui function analysis and density functional theory (DFT) calculation. © 2022, The Authors. All rights reserved.

关键词： Degradation

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Acetal-thiol Click-like Reaction: Facile and Efficient Synthesis of Dynamic Dithioacetals and Recyclable Polydithioacetals

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Angewandte Chemie 2024年第31期136卷

作者： Shuai Du Shuaiqi Yang Binbo Wang Pengyun Li Prof. Dr. Jin Zhu Prof. Dr. Songqi Ma Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University Wuxi 214122 P. R. China Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. China Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China

Dithioacetals are heavily used in organic, material and medical chemistries, and exhibit huge potential to synthesize degradable or recyclable polymers. However, the current synthetic approaches of dithioacetals and polydithioacetals are overwhelmingly dependent on external catalysts and organic solvents. Herein, we disclose a catalyst- and solvent-free acetal-thiol click-like reaction for synthesizing dithioacetals and polydithioacetals. High conversion, higher than acid catalytic acetal-thiol reaction, can be achieved. High universality was confirmed by monitoring the reactions of linear and cyclic acetals (including renewable bio-sourced furan-acetal) with aliphatic and aromatic thiols, and the reaction mechanism of monomolecular nucleophilic substitution (S N 1) and auto-protonation (activation) by thiol was clarified by combining experiments and density functional theory computation. Subsequently, we utilize this reaction to synthesize readily recyclable polydithioacetals. By simple heating and stirring, linear polydithioacetals with w of ~110 kDa were synthesized from acetal and dithiol, and depolymerization into macrocyclic dithioacetal and repolymerization into polydithioacetal can be achieved; through reactive extrusion, a semi-interpenetrating polymer dynamic network with excellent mechanical properties and continuous reprocessability was prepared from poly(vinyl butyral) and pentaerythritol tetrakis(3-mercaptopropionate). This green and high-efficient synthesis method for dithioacetals and polydithioacetals is beneficial to the sustainable development of chemistry.

关键词： dynamic bond dithioacetal recyclable polymer closed-loop recycle covalent adaptable networks

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Novel 2D layered g-C3N4 nanocomposite materials for sustainable wastewater treatment by catalytic degradation of toxic dye

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Optik 2024年 311卷

作者： Khatun, Most Munera Miah, Mohammad Raza Yan, Chunjie Foijunnesa, Most Bashar, M.Mahbubul Khandaker, Shahjalal Kuba, Takahiro Alzahrani, Khalid A. Shenashen, M.A. Rahman, Mohammed M. Asiri, Abdullah M. Islam, Aminul Hasan, Md. Munjur Awual, Md. Rabiul Faculty of Materials Science and Chemistry China University of Geosciences Lumo Road 388 Wuhan430074 China Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China University of Chinese Academy of Sciences Beijing100049 China College of Chemistry & Chemical Engineering Wuhan Textile University Wuhan430079 China Department of Textile Engineering Mawlana Bhashani Science and Technology University Tangail Santosh1902 Bangladesh Department of Textile Engineering Dhaka University of Engineering and Technology Gazipur Bangladesh Department of Urban and Environmental Engineering Graduate School of Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka819-0395 Japan Center of Excellence for Advanced Materials Research King Abdulaziz University Jeddah21589 Saudi Arabia Chemistry Department Faculty of Science King Abdulaziz University Jeddah21589 Saudi Arabia Department of Chemistry Faculty of Science Islamic University of Madinah Madinah42351 Saudi Arabia Department of Petroleum and Mining Engineering Jashore University of Science and Technology Jashore7408 Bangladesh Department of Applied Chemistry & Chemical Engineering University of Dhaka Dhaka1000 Bangladesh Department of Chemistry Graduate School of Science Osaka University Osaka560-0043 Japan Western Australian School of Mines: Minerals Energy and Chemical Engineering Curtin University GPO Box U 1987 PerthWA6845 Australia

The photocatalytic degradation technique is one of the suitable ways of dealing with environmental pollutant decontamination. This study demonstrates the ability of graphitic carbon nitride (g-C3N4) nanocomposites containing tellurium (Te) and molybdenum disulfide (MoS2) to photocatalytically destroy organic cationic methylene blue (MB) dye, which is primarily used in the textile industry. Using the alkali treatment approach, layered graphitic carbon nitride (g-C3N4) was created. Using MoS2 and Te, several g-C3N4 nanocomposites were created using ultrasonic calcination techniques. After the MoS2 and Te were immobilized individually, the composites underwent a methodical characterization process utilizing a variety of instruments, including XRD and SEM. Using a 2D layered nano-g-C3N4 substrate, the photo-catalytic degradation reaction of MB was observed, and a UV spectrophotometer was used to determine the absorbance of the MB dye. Using 0.2 % MoS2/g-C3N4 and 5 % Te/g-C3N4, the photocatalytic degradation efficiency of the MB dye (10, 15, and 20 mg/L) solution was examined. In comparison to other produced nanocomposites, the 5 % Te/g-C3N4 composite was shown to have the highest photocatalytic activity in terms of dye degradation ability, and about 100 % of the MB dyes were degraded in less than 60 minutes. As the concentration of MB increased, the dye degradation efficiency of g-C3N4 nanocomposites steadily dropped, and the degradation rate of MB was around 1.5 mg/L. © 2024 The Authors

关键词： Wastewater treatment

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