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SSRN 2024年

作者： Xu, Zhou Chi, Junlin Wu, Zhenwei Yang, Zheng Miao, Yuanyuan Ma, Chunhui Li, Wei Luo, Sha Liu, Shouxin Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Heilongjiang Harbin150040 China

biomass porous nanocarbons has a promising application in electrochemistry. However, controlling the morphology and pore structure presents a formidable challenge. Monodisperse hierarchical porous carbon nanorods (HPCNs) are synthesized from D-xylose, sodium dodecyl sulfate and poly (4-styrenesulphonic acid-co-maleic acid) sodium salt in the hydrothermal condition, followed by activation of KHCO3. Similarly, raspberry-like and spindle-like hierarchical porous nanocarbons can be obtained using sodium laurate and sodium oleate instead of sodium dodecyl sulfate. The hierarchical porous structure facilitates the infiltration and mass transfer process and improves electrochemical performance. In a 6 mol·L-1 KOH electrolyte, the specific capacitance of the HPCNs reaches 302 F·g-1 at a current density of 0.2 A·g-1, and the retention rate is 97% after 6000 charge-discharge cycles at 10 A·g-1. In a pure 1-butyl-3-methylimidazolium tetrafluoroborate electrolyte, a symmetric supercapacitor assembled with HPCNs exhibits a specific capacitance of 125 F·g-1 and an energy density of 39.06 W·h·kg-1 at 0.1 A·g-1. © 2024, The Authors. All rights reserved.

关键词： Supercapacitor

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Developments of polyurethane in biomedical applications:A review

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Resources Chemicals and materials 2023年第4期2卷 262-276页

作者： Minghui Cui Zheng Chai Yao Lu Jin Zhu Jing Chen Department of Materials Science and Engineering Shenyang University of Chemical TechnologyShenyang 110142PR China Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Division of Polymer and Composite MaterialsNingbo Institute of Material Technology and EngineeringChinese Academy of SciencesZhejiangNingbo 315201PR China

Polyurethane is an excellent and widely used polymer *** synthesizing polyurethane,the structure of soft and hard segments in polyurethane could be adjusted,which can obtain better properties than other polymer materials,such as good mechanical properties and *** recent years,due to their excellent chemical stability,biocompatibility,and low cytotoxicity,polyurethanes have been widely used for biomedical *** solve the problems of degradation and recycling,the development of bio-based polyurethane has also become a current hot *** paper summarizes the research progress and applications of polyurethane materials for dressings,skin sensors,orthopedics,and *** also looks forward to the future development of polyurethane medical materials.

关键词： Polyurethane Dressings Skin sensors Orthopedics Cardiovascular applications

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A Bifunctional Brønsted Acidic Deep Eutectic Solvent to Dissolve and Catalyze the Depolymerization of Alkali Lignin

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Journal of Renewable materials 2021年第2期9卷 219-235页

作者： Lifen Li Zhigang Wu Xuedong Xi Baoyu Liu Yan Cao Hailong Xu Yingcheng Hu College of Forestry Guizhou UniversityGuiyang550025China ENSTIB-LERMAB University of LorraineEpinal88051France Special and Key Laboratory for Development and Utilization of Guizhou Superior Bio-Based Materials Guizhou Minzu UniversityGuiyang550025China Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education of China College of Material Science and EngineeringNortheast Forestry UniversityHarbin150040China

Lignin is an abundant renewable macromolecular material in nature,and degradation of lignin to improve its hydroxyl content is the key to its efficient *** lignin(AL)was treated with Brønsted acidic deep eutectic solvent(DES)based on choline chloride and p-toluenesulfonic acid at mild reaction temperature,the structure of the lignin before and after degradation,as well as the composition of small molecules of lignin were analyzed in order to investigate the chemical structure changes of lignin with DES treatment,and the degradation mechanism of lignin in this acidic DES was elucidated in this *** and NMR analyses demonstrated the selective cleavage of the lignin ether linkages in the degradation process,which was in line with the increased content of phenolic hydroxyl *** revealed that the O/C atomic ratio of the regenerated lignin was lower than that of the AL sample,revealing that the lignin underwent decarbonylation during the DES *** lignin with low molecular weight and narrow polydispersity index was obtained,and the average molecular weight(Mw)decreased from 17680 g/mol to 2792 g/mol(130°C,3 h)according to GPC *** lignin-degraded products were mainly G-type phenolics and ketones,and small number of aldehydes were also generated,the possible degradation pathway of lignin in this acidic DES was proposed.

关键词： Alkali lignin depolymerization Brønsted acidic deep eutectic solvent structural analysis

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Synergistic boosting the electrooxidation of biomass-based 5-hydroxymethylfurfural on cellulose-derived Co3O4/N-doped carbon catalysts

Materials Today Catalysis

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materials Today Catalysis 2024年 7卷

作者： Sun, Haixin Gao, Yingying Chen, Mengyuan Li, Ming Xia, Qinqin Liu, Yongzhuang Meng, Juan Dou, Shuo Yu, Haipeng Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin150040 China School of Resources and Environmental Engineering Jiangsu University of Technology Changzhou213001 China

Catalysts play a pivotal role in the efficient conversion of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) through electrochemical oxidation. In this work, a cost-effective and highly efficient cobalt-based electrocatalyst for the synthesis of bio-based carboxylic acids was reported. By the employment of cellulose, which was dissolved in the alkaline-urea with cobalt ion, as the precursor, it derived a carbon-coated Co3O4 (Co3O4@NC) catalyst with a high specific surface area and rich porous structure. When utilized in the electrocatalytic conversion of HMF to FDCA, the catalyst exhibited exceptional yields and Faradaic efficiency which surpassed 95 %. In-situ Raman spectra unveiled that a dual-pathway process occurred on this catalyst, with part of Co3O4 serving as active sites for HMF adsorption, while other Co3O4 transformed into CoOOH during the reaction. This dual-pathway electrocatalysis facilitated the highly efficient conversion of HMF. Additionally, using bio-based alcohols/aldehydes as the feedstocks, eight carboxylic acids were successfully synthesized with yields ranging from 91.5 % to 99 %. This study presents a highly efficient electrocatalyst derived from biomass, enabling diverse bio-based carboxylic acid production with significant potential for sustainable chemical synthesis. © 2024 The Authors

关键词： Electrochemical oxidation

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Soft-Template Hydrothermal Synthesis of N, B Co-Doped Walnut-Shaped Porous Carbon Sphere with Hydrophilic Surface for Supercapacitor

SSRN

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SSRN 2023年

作者： Xu, Zhou Wu, Zhenwei Chi, Junlin Lei, E. Liu, Yuxuan Yin, Yu Yang, Zheng Ma, Chunhui Li, Wei Luo, Sha Liu, Shouxin Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Heilongjiang Harbin150040 China

N, B co-doped walnut-shaped porous carbon spheres (NBCs) were prepared by soft-template hydrothermal carbonization of glucosamine, boric acid and block copolymer (P123). The NBCs formed a three-dimensional interconnected structure, and were doped with nitrogen in the forms of pyridine N (N-6), pyrrole N (N-5), graphite N (N-Q), nitrogen oxide (N-O) or N-B and boron in the forms of CB3, CB2O, CBO2 or B-N. Chemical vapor oxidation with controllable low concentration nitric acid was used to transform its super-hydrophobicity into well-hydrophilicity. The porous carbon sphere with hydrophilic surface maintained a relatively complete walnut-shaped structure, high specific surface area and stable heteroatom doping, and exhibited an improved specific capacitance of 281 F·g-1 at a current density of 0.2 A·g-1 and rate performance of 75 % at 5 A·g-1. The assembled symmetrical supercapacitor showed a high energy density of 6.56 W·h·kg-1 at 0.1 A·g-1 and superb cycling stability of 95% after 5000 cycles at 2 A·g-1. For electrode materials, walnut-shaped structure with short electron and ion transport paths enhanced the utilization efficiency. Heteroatom doping improved the conductivity and reactivity. High specific surface area contributed to the storage and transport of ions. Hydrophilic surface facilitated the penetration and mass transfer of ion and electrolyte. © 2023, The Authors. All rights reserved.

关键词： Supercapacitor

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Decorative Wood Fiber/High-Density Polyethylene Composite with Canvas or Polyester Fabric

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Journal of Renewable materials 2020年第8期8卷 879-890页

作者： Jialin Lv Rao Fu Yinan Liu Xuelian Zhou Weihong Wang Pengbo Xie Tingwei Hu Key Lab of Bio-Based Material Science&Technology of EducationMinistry Northeast Forestry UniversityHarbin150040China Taizhou University Taizhou318000China

Wood-plastic composite is an environmentally friendly material,due to its use of recycled thermoplastics and plant ***,its surface lacks attractive aesthetic *** this paper,a method of decorating wood fiber/high-density polyethylene(WF/HDPE)without adding adhesive was *** or polyester fabrics were selected as the surface decoration *** influence of hot-pressing temperature and WF/HDPE ratio on the adhesion was *** surface bonding strength,water resistance,and surface color were evaluated,and observation within the infrared spectrum and under scanning electron microscopy was used to analyze the bonding *** results showed that the fabric and WF/HDPE substrate could be closely laminated together depending on the HDPE layer accumulated on the WF/HDPE *** molten HDPE matrix penetrates canvas more easily than polyester fabric,and the canvasveneered composite shows a greater bonding strength than does the polyester fabric-veneered composite.A higher proportion of the thermoplastic component in the substrate improved the *** the hot-pressing temperature exceeded 160°C,the fabric-veneered WF/HDPE panels had greater water resistance,although the canvas fabric changed more obviously in terms of fiber shape and color,compared with the polyester *** the canvas fabric,140°C–160°C was a suitable hot-pressing temperature,whereas 160°C–180°C was more suitable for polyester *** proportion of the thermoplastic component in the composite should be not less than 30%to achieve adequate bonding strength.

关键词： wood-plastic composites high-density polyethylene polyester fiber canvas surface decoration

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biopolymer Nanofibers for Nanogenerator Development

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Research 2021年第1期2021卷 30-49页

作者： Lulu Bai Qing Li Ya Yang Shengjie Ling Haipeng Yu Shouxin Liu Jian Li Wenshuai Chen Key Laboratory of Bio-Based Material Science and Technology Ministry of EducationNortheast Forestry UniversityHarbin 150040China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

The development of nanogenerators(NGs)with optimal performances and functionalities requires more novel *** the past decade,biopolymer nanofibers(BPNFs)have become critical sustainable building blocks in energy-related fields because they have distinctive nanostructures and properties and can be obtained from abundant and renewable *** review summarizes recent advances in the use of BPNFs for NG *** will begin by introducing various strategies for fabricating BPNFs with diverse structures and ***,we will systematically present the utilization of polysaccharide and protein nanofibers for *** will mainly focus on the use of BPNFs to generate bulk materials with tailored structures and properties for assembling of triboelectric and piezoelectric *** use of BPNFs to construct NGs for the generation of electricity from moisture and osmosis is also ***,we illustrate our personal perspectives on several issues that require special attention with regard to future developments in this active field.

关键词： fibers polymer moisture

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Recyclable nanocellulose-confined palladium nanoparticles with enhanced room-temperature catalytic activity and chemoselectivity

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science China materials 2021年第3期64卷 621-630页

作者： Juan Meng Yongzhuang Liu Xiaochao Shi Wenshuai Chen Xianquan Zhang Haipeng Yu Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbin150040China

We describe the synthesis of even-dispersed palladium nanoparticles(Pd NPs)confined within a cellulose nanofiber(CNF)matrix for developing a high-performance and recyclable *** CNF matrix was composed of CNF-assembled mesoporous nanosheets and appeared as soft and hydrophilic *** Pd NPs(∼6 nm)with high-loading(9.6 wt%)were in situ grown on these mesoporous nanosheets,and their dense spatial distributions were likely to generate nano-confinement catalytic effects on the ***,the CNF-confined Pd NPs(CNF-Pd)exhibited an enhanced room-temperature catalytic activity on the model reaction of 4-nitrophenol hydrogenation with a highest rate constant of 8.8×10^−3 s^−1 and turnover frequency of 2640 h The CNF Pd catalyst possessed good chemical stability and recyclability in aqueous media which could be reused for at least six cycles without losing ***,chemoselective reduction of 3 nitrostyrene was achieved with high yield(80%–98%)of 3-aminostyrene in alcohol/water ***,this work demonstrates a positive nanoconfinement effect of CNFs for developing stable and recyclable metal NP catalysts.

关键词： nanocellulose deep eutectic solvents palladium nanoparticles catalysts nano-confinement

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Ultrathin and Highly Flexible Layered Silver Nanowires/Carboxymethyl Cellulose Nanofiber Nanocomposite Films for Electromagnetic Interference Shielding

SSRN

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SSRN 2024年

作者： Dai, Yaohui Jiang, Dexing Bai, Long Li, Zhiguo Huo, Pengfei Liu, Yang College of Material Science and Engineering Northeast Forestry University Harbin150040 China Key Laboratory of Bio-based Materials Science & Technology Ministry of Education Northeast Forestry University Harbin150040 China

The development of electronic information technology has led to an increasingly serious problem of electromagnetic radiation pollution. It is urgent to explore a lightweight, flexible, and easy to manufacture electromagnetic interference (EMI) shielding material. In this study, we employed one-dimensional carboxymethyl cellulose nanofibers (CMCs) and silver nanowires (AgNWs) to fabricate a silver nanowire/carboxymethyl cellulose nanofiber (AgNWs/CMC) nanocomposite film with a layered structure through a one-step vacuum filtration self-assembly technique. The results indicate that the unique layered structure of AgNWs/CMC nanocomposite film significantly increases the conductive pathway in the film, which endows the AgNWs/CMC nanocomposite film with significant EMI shielding performance, reaching 87.7dB in the X-band with a thickness of only 20 μm and achieving effective shielding of electromagnetic signals in mobile communication. In addition, AgNWs/CMCs nanocomposite films exhibit excellent Joule heating, heat dissipation, and photothermal conversion performance. Therefore, this layered AgNWs/CMCs nanocomposite film is expected to broaden new application fields, such as wearable heating devices, flexible electronic devices, and other new applications. © 2024, The Authors. All rights reserved.

关键词： Nanocomposite films

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Self-healing Polymeric Hydrogels:Toward Multifunctional Soft Smart materials

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Chinese Journal of Polymer science 2021年第10期39卷 1262-1280,I0006页

作者： Xiao-Ling Zuo Shao-Fan Wang Xiao-Xia Le Wei Lu Tao Chen College of Materials Science and Engineering Guizhou Minzu UniversityGuiyang 550025China Key Laboratory of Bio-Based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

The concept of self-healing that involves a built-in ability to heal in response to damage wherever and whenever it occurs in a material,analogous to the healing process in living organisms,has emerged a couple of decades *** primarily by the demands for life-like materials and soft smart materials,therefore,the development of self-healing polymeric hydrogels has continually attracted the attention of the scientific ***,this review is intended to give an in-depth overview of the state-of-the-art advances in the field of self-healing polymeric ***,recently emerging trends in self-healing polymeric hydrogels are summarized,and notably,recommendations to endow these hydrogels with fascinating multi-functionalities including luminescence,conductivity/magnetism and shape memory etc are *** close,the current challenges and future opportunities in this field are also discussed.

关键词： Polymeric hydrogels Self-healing Multi-functionalities Smart materials

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