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Safe and economical preparation of amino acid-derived bio-based triazine char-forming agent for efficient intumescent flame retardant polypropylene

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Construction and Building materials 2025年 484卷

作者： Xu, Yue Hu, Haojie Tao, Bin Yin, Ru Liu, Lubin Li, Bin Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials College of Chemistry Chemical Engineering and Resource Utilization Northeast Forestry University Harbin150040 China Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin150040 China National and Local Joint Engineering Laboratory for Ecological Utilization of Biological Resources Northeast Forestry University Harbin150040 China

Triazine intumescent flame retardant (IFR) PP composites have been widely used in electronic appliances, rail transit, and aerospace fields due to their low smoke, high efficiency and environmental friendliness. However, with the increasing attention to safe production and sustainable development, the green and safe synthesis and biomaterialization of traditional triazine char-forming agents have received extensive attention. Herein, a bio-based triazine char-forming agent N-propionyltriazine-ethylenediamine copolymer (PTEC) was successfully prepared by bio-based β-alanine and cyanuric chloride as raw materials under a pure water system for the first time. A novel bio-based IFR (BIFR) system was constructed with ammonium polyphosphate. Only 24 wt% BIFR make PP pass the UL-94 V-0 rating, and the LOI of PP/BIFR was improved to 29.7 %. Compared to pure PP, the smoke and heat release rate of PP/BIFR composites were decreased by 54.5 % and 76.2 %, respectively. The introduction of BIFR promoted the dehydration and charring of PP composites, and released many inert gases during pyrolysis, which led to the rapid expansion of composites. The formed dense and high-strength char layer exerted excellent shielding effect in the condensed phase. In addition, the PP/BIFR composites retained excellent mechanical properties, and the flexural strength and ductility were significantly improved with the addition of BIFR. This study provided a new way for the safe production and biomaterialization of triazine char-forming agents, and the prepared bio-based PP composites with excellent flame retardancy and mechanical properties showed a great application prospect in construction, building materials and other emerging fields. © 2025 Elsevier Ltd

关键词： Bending strength

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Constructing Oxygen Vacancy-Regulated Cu/Fe2o3 Nanorod Array Electrodes for Boosting the Electrocatalytic Reduction of Nitrate

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SSRN 2023年

作者： Yang, Ziyi Li, Yudong Liu, Dan Song, Maosen Gao, Yang Yang, Bin Han, Enshan He, Yanzhen Yang, Xiaohui School of Chemical Engineering Hebei University of Technology Tianjin300400 China Key Laboratory of Bio-based Material Science and Technology Northeast Forestry University Ministry of Education Heilongjiang Harbin150040 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing400714 China

The adsorption of nitrate is the key to enhancing the electrocatalytic nitrate reduction reaction (NitRR). Constructing oxygen vacancies (OVs) has been an effective strategy that can modulate the local electronic structure and enhance the adsorption of nitrate. However, the existing methods for effectively regulating the concentration of oxygen vacancies are still limited. Herein, based on a detailed understanding of the NitRR mechanism, a typical hydrolysis-coupling redox (HCR) reaction has been designed to prepare unique 3D Cu/Fe2O3 core-shell nanorod array cathodes with controllable oxygen vacancy concentration. The optimal Cu/Fe2O3-13 achieves a high nitrate conversion of 99.10% and ammonia selectivity of 98.30% in a 0.2 M Na2SO4 solution with 100 ppm [[EQUATION]]-N at -1.4 V vs. SCE. Furthermore, the Cu/Fe2O3-13 exhibits exceptional stability throughout a 30-hour electrocatalytic process. The outstanding electrochemical performance is attributed to the enhancement mechanism of OVs and a unique nanorod array structure with a high density of surface-exposed OVs and high-throughput transport pathways for ions-aspects. © 2023, The Authors. All rights reserved.

关键词： Electrocatalysis

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bio-based and biodegradable Electrospun Fibers Composed of Poly(L-lactide) and Polyamide 4

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Chinese Journal of Polymer science 2020年第1期38卷 53-62,I0006页

作者： Tao Chen Guo-Cheng Zhong Yuan-Ting Zhang Li-Ming Zhao Yong-Jun Qiu School of Materials Science and Engineering East China University of Science and TechnologyShanghai 200237China Key Laboratory of Bio-based Material Engineering of China National Light Industry Council Shanghai200237China Shanghai Key Laboratory of Advanced Polymeric Materials Shanghai200237China School of Biotechnology East China University of Science and TechnologyShanghai200237China

Novel bio-based and biodegradable block copolymers were synthesized by "click" reaction between poly(L-lactide)(PLLA) and polyamide 4(PA4). Upon tuning the molar mass of PLLA block, the properties of copolymers and electrospun ultrafine fibers were investigated and compared with those of PLLA and PA4 blends. PLLA and PA4 were found incompatible and formed individual crystalline regions, along with reciprocal inhibition in crystallization. Electrospun fibers were highly hydrophobic, even if hydrophilic PA4 was the rich component. The crystallinity of either PLLA or PA4 decreased after electrospinning and PLLA-rich as-spun fibers were almost amorphous. Immersion tests proved that fibers of block copolymers were relatively homogeneous with micro-phase separation between PLLA and PA4. The fibrous structures of copolymers were different from those of the fibers electrospun from blends, for which sheath-core structure induced by macro-phase separation between homopolymers of PLLA and PA4 was confirmed by TEM, EDS, and XPS.

关键词： Poly(L-lactide) Polyamide 4 "Click"reaction Electrospinning Fiber

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biomimetic Wood-Confined Hydrogel Ion Channel for Flexible Supercapacitors

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SSRN 2022年

作者： Gao, Chenxiang Liu, Yue Zhang, Jiuzhou Li, Hui Liu, Yang Gu, Jiyou Ma, Tianyi Huo, Pengfei Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin150040 China School of Science RMIT University MelbourneVIC3000 Australia Centre for Translational Atomaterials

Hydrogel is a promising electrolyte substrate;however, the dimensional stability and ionic conductivity need to be further improved. To tackle this issue, a flexible poly (acrylic acid-co-acrylamide) [P(AA-co-AM)]-filled wood hydrogel composite electrolyte (WHE) is rationally designed and fabricated. This is the first demonstration that flexible wood as a porous backbone for hydrogels can regulate ion transport pathways to improve ionic conductivity and enhance dimensional stability of hydrogels. Firstly, the wood is delignified. Then the P(AA-co-AM) is uniformly distributed in the low tortuosity pores of wood by an in-situ polymerization reaction. The straight pores of wood confine the transport of electrolyte ions along the shortest path. The regulation effect of wood on ion transport paths makes the ionic conductivity (3.0 × 10 -2 S cm -1 ) of the electrolyte standing among the best of composite polymer electrolyte. The optimized supercapacitor exhibits a specific capacitance of 155.64 F g -1 and an energy density of 7.45 W h kg -1 . It also exhibits good flexibility under bending conditions and can maintain similar electrochemical performance at a wide range of bending angles. This work provides an effective strategy for the efficient use of wood resources and the development of low-cost, environmentally friendly and high-performance hydrogel electrolyte materials. © 2022, The Authors. All rights reserved.

关键词： Hydrogels

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Design of heat-sealing starch-based bioplastics reinforced with different modified starches and TEMPO-CNF

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Industrial Crops and Products 2025年 232卷

作者： Di Xie Jinhong Li Congcong Zhang Siwen Yang An Yang Shanshan Song Yongming Song Key Laboratory of Bio-based Material Science and Technology (Ministry of Education) Northeast Forestry University Harbin Heilongjiang 150040 China

An increasing interest in utilizing biomass resources to develop bioplastics, aiming to mitigate the environmental and energy issues resulting from the use of petroleum-based plastics. However, bioplastics that suffering from poor interface bonding and hydrophilicity of the feedstock usually exhibit inadequate mechanical properties, water stability and functionality, which hinder their practical applications. Herein, a simple and effective strategy was proposed to develop high-performance starch-based bioplastics with thermoplastic by 2,2,6,6-tetramethylpiperidine 1-oxy-oxidized cellulose nanofibers and different modified starch fillers coupled with chemical cross-linking reinforcement. Due to the full utilization of the advantages of each component, outstanding interface bonding and rich chemical cross-linking, all the obtained modified starch-based bioplastics demonstrated excellent mechanical properties (up to 20.52 MPa) and superior water stability. Besides, the starch-based bioplastics could be reused after dissolution-regeneration, and completely biodegradable after disposal. At the same time, the starch-based bioplastics exhibited remarkable heat-sealing properties, which provided more convenient possibility of producing packaging materials for bioplastics used in different fields.

关键词： bioplastic Mechanical properties Water resistance Heat-sealing property

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Photo-Fenton Degradation of Tetracycline Hydrochloride with Fe2o3-on-Zro2 Octapods Derived from Mil-88b-On-Uio-66-Nh2 within Full Ph Range: Kinetics, Degradation Pathway, Dft Calculation and Mechanism Insight

SSRN

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SSRN 2022年

作者： Zhang, Tingting Liu, Xing Jiang, Yanqiu Zheng, Xiaowei Zhang, Jian Li, Yudong Li, Defeng Lin, Kaifeng MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China Key Laboratory of Bio-based Material Science & Technology Ministry of Education Northeast Forestry University Harbin150040 China

Photo-Fenton reaction has received increasing attention in the removal of antibiotic pollutants in water. Herein, Fe 2 O 3 -on-ZrO 2 octapods, Fe 2 O 3 with rod-shaped cone precisely aligned on each lattice plane of ZrO 2 octahedron, were designed and synthesized via simple reflux heating and baking, combined lattice plane recognition with heteroepitaxial directional growth strategies. There are a large number of Fe 2 O 3 -on-ZrO 2 heterojunctions closely connected by Fe-O-Zr bond, which conduce to the separation and transmission between photoinduced e - and h + , accelerate the iron cycle and then generate more highly active free radicals to promote the decomposition of tetracycline hydrochloride (TC-HCl). Fe 2 O 3 -on-ZrO 2 had high adsorption energy for H 2 O 2 by DFT calculation, which greatly speeded the participation of H 2 O 2 . The results of photo-Fenton degradation experiments showed that under UV-vis light irradiation, more than 95% TC-HCl solution was degraded by Fe 2 O 3 -on-ZrO 2 in 25 minutes within full pH range, which demonstrated excellent photo-Fenton performance and the pH limit broken. Finally, the possible degradation path and reasonable degradation mechanism were speculated by HPLC-MS, SKP, ESR etc. This work exhibited a new structure and degradation mechanism, which would further encourage researchers to study the rational regulation of materials with special morphology and structure. © 2022, The Authors. All rights reserved.

关键词： Degradation

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One stone two birds: biosynthesis of 3-hydroxypropionic acid from CO2 and syngas-derived acetic acid in Escherichia coli

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Synthetic and Systems biotechnology 2021年第3期6卷 144-152页

作者： Ningyu Lai Yuanchan Luo Peng Fei Peng Hu Hui Wu State Key Laboratory of Bioreactor Engineering School of BiotechnologyEast China University of Science and Technology130 Meilong RoadShanghai200237China Shanghai Collaborative Innovation Center for Biomanufacturing Technology 130 Meilong RoadShanghai200237China Key Laboratory of Bio-based Material Engineering of China National Light Industry Council 130 Meilong RoadShanghai200237China Shanghai GTL Biotech Co. Ltd.1688 North Guoquan RoadShanghai200438China

Syngas,which contains large amount of CO2 as well as H2 and CO,can be convert to acetic acid chemically or ***,acetic acid become a cost-effective nonfood-based carbon source for value-added biochemical *** this study,acetic acid and CO2 were used as substrates for the biosynthesis of 3-hydroxypropionic acid(3-HP)in metabolically engineered Escherichia coli carrying heterogeneous acetyl-CoA carboxylase(Acc)from Corynebacterium glutamicum and codon-optimized malonyl-CoA reductase(MCR)from Chloroflexus *** of metabolic engineering included promoting glyoxylate shunt pathway,inhibiting fatty acid synthesis,dynamic regulating of TCA cycle,and enhancing the assimilation of acetic *** engineered strain LNY07(M*DA)accumulated 15.8 g/L of 3-HP with the yield of 0.71 g/g in 48 h by whole-cell ***,syngas-derived acetic acid was used as substrate instead of pure acetic *** concentration of 3-HP reached 11.2 g/L with the yield of 0.55 g/g in LNY07(M*DA).The results could potentially contribute to the future development of an industrial bioprocess of 3-HP production from syngas-derived acetic acid.

关键词： Syngas-derived acetic acid 3-Hydroxypropionic acid Metabolic engineering Escherichia coli Dynamic regulation

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Effect of an antioxidant on the life cycle of wood flour/polypropylene composites

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Journal of Forestry Research 2020年第4期31卷 1435-1443页

作者： Haigang Wang Jingfa Zhang Haitao Fu Weihong Wang Qingwen Wang Key Laboratory of Bio-Based Material Science and Technology(Ministry of Education) Northeast Forestry UniversityHarbin 150040People’s Republic of China College of Materials and Energy South China Agricultural UniversityGuangzhou 510642People’s Republic of China

This study assessed the life cycle of biocomposites with antioxidants by repeated *** effects of antioxidants on the life cycle of wood flour/polypropylene(PP)composites were determined by analyzing their mechanical and thermal *** composites were repeatedly processed for seven times with pelletizing and *** antioxidant,pentaerythritoltetrakys 3-(3,5-ditert-butyl-4-hydroxyphenyl)propionate,was *** mechanical strength of the biocomposites decreased after *** transformed infrared analysis showed that thermo-oxidative aging occurred during *** thermal performance of the resulting composites decreased because of *** flour/PP has a long lifetime and antioxidants can slow the thermo-oxidative and mechanical degradation during reprocessing.

关键词： Wood-plastic composites Polypropylene Reprocessing Antioxidant

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Subtle Side Chain Triggers Unexpected Two-Channel Charge Transport Property Enabling 80%Fill Factors and Efficient Thick-Film Organic Photovoltaics

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The Innovation 2021年第1期2卷 173-182页

作者： Yonghai Li Lu Yu Liangliang Chen Chenyu Han Huanxiang Jiang Zitong Liu Nan Zheng Jiuxing Wang Mingliang Sun Renqiang Yang Xichang Bao CAS Key Laboratory of Bio-based Materials Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China School of Material Science and Engineering Ocean University of ChinaQingdao 266100China Functional Laboratory of Solar Energy Shandong Energy InstituteQingdao 266101China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640China School of Materials Science and Engineering Qingdao UniversityQingdao 266071China Key Laboratory of Optoelectronic Chemical Materials and Devices(Ministry of Education) School of Chemical and Environmental EngineeringJianghan UniversityWuhan 430056China

To clearly show how important the impact of side chains on organic solar cells(OSCs)is,we designed three acceptors IDIC-CxPh(x=4,5,or 6)via subtle side-chain *** this small change,significant distinctions were ***-C4Ph devices achieve an optimal efficiency of 13.94%under thermal annealing,but thermal-assistant solvent-vapor annealing hugely suppresses the efficiencies to 10%.However,the C6Ph side chain endows extremely disordered stacking orientations,generating moderate efficiencies of~12.50%.Excitingly,the IDIC-C5Ph affords an unexpected two-channel p-p charge transport(TCCT)property,boosting the fill factor(FF)by up to 80.02%and efficiency to 14.56%,ranking the best among five-ring fused-ladder-type ***,the special TCCT behavior of IDIC-C5Ph enables 470 nm thick-film OSC with a high FF of up to 70.12%and efficiency of 13.01%,demonstrating the great promise in fabricating largescale OSCs.

关键词： organic solar cells side chain molecular assembly twochannel charge transport thick-film

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Polyzwitterionic Hydrogel Electrolytes Via Ultrafast Autocatalytic Gelation Process for Flexible Zn-Ion Hybrid Supercapacitors

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SSRN 2023年

作者： Liu, Jiankang Wang, Fangfang Jiang, Weikun Zhao, Qian Li, Wei Wang, Chunyang Liu, Shiwei Liu, Yu State Key Laboratory of Bio-based Material and Green Papermaking Qilu University of Technology Shandong Academy of Sciences Shandong250353 China Faculty of Light Industry and Chemical Engineering Dalian Polytechnic University Liaoning 116034 China College of Chemical Engineering Qingdao University of Science and Technology Shandong266061 China

Hydrogel electrolytes with high intrinsic toughness and ionic conductivity are considered essential for realising flexible energy storage. Polyzwitterionic hydrogel electrolytes typically exhibit excellent ionic transference number and conductivity because of their distinct rapid anionic and cationic channels, thereby achieving superior ionic transport kinetics. This paper presents an ultrafast autocatalytic gelation process, which can produce a self-adhesive hydrogel electrolyte (PAD@SC) via copolymerization of vinyl monomer acrylic acid and zwitterionic monomer sulfobetaine in a time scale of seconds instead of hours at room temperature (approximately 20 ℃). The incorporation of bio-based functional enhancement components, namely, sodium lignosulfonate and nanocellulose, into the hydrogel precursor solution facilitated the reconstruction of noncovalent hydrogen bond networks within the hydrogel, resulting in enhanced mechanical properties. Moreover, the PAD@SC hydrogel electrolyte prepared using this autocatalytic system can effectively inhibit the growth of Zn dendrites to realize a stable Zn anode. The assembled PAD@SC-based flexible Zn-ion capacitors possess high specific capacitance (85.4 mAh g-1), rate performance, and cycling stability (10000 cycles at 5 A g-1), indicating remarkable potential for practical application in flexible power supplies. © 2023, The Authors. All rights reserved.

关键词： Hydrogels

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