SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 43 ›› Issue (3): 360-369.DOI: 10.1016/j.cjche.2021.12.031

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Top-down strategy for bamboo lignocellulose-derived carbon heterostructure with enhanced electromagnetic wave dissipation

Shaoxiang Cai1,2,3, Han Yan2,3, Qiuyi Wang2,3, He Han2,4, Ru Li2,3, Zhichao Lou2,3,5   

  1. 1. School of Textile Garment and Design, Changshu Institute of Technology, Changshu 215506, China;
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
    3. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;
    4. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China;
    5. College of Engineering, University of Georgia, Athens 30605, GA, USA
  • 收稿日期:2021-11-25 修回日期:2021-12-24 出版日期:2022-03-28 发布日期:2022-04-28
  • 通讯作者: Zhichao Lou,E-mail:zc-lou2015@njfu.edu.cn
  • 基金资助:
    This manuscript is supported by funding from the National Natural Science Foundation of China (31770609, 31570552), Jiangsu Agricultural Science and Technology Independent Innovation Fund (CX(20)3041).

Top-down strategy for bamboo lignocellulose-derived carbon heterostructure with enhanced electromagnetic wave dissipation

Shaoxiang Cai1,2,3, Han Yan2,3, Qiuyi Wang2,3, He Han2,4, Ru Li2,3, Zhichao Lou2,3,5   

  1. 1. School of Textile Garment and Design, Changshu Institute of Technology, Changshu 215506, China;
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
    3. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;
    4. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China;
    5. College of Engineering, University of Georgia, Athens 30605, GA, USA
  • Received:2021-11-25 Revised:2021-12-24 Online:2022-03-28 Published:2022-04-28
  • Contact: Zhichao Lou,E-mail:zc-lou2015@njfu.edu.cn
  • Supported by:
    This manuscript is supported by funding from the National Natural Science Foundation of China (31770609, 31570552), Jiangsu Agricultural Science and Technology Independent Innovation Fund (CX(20)3041).

摘要: Biomass-derived residue carbonization has been an important issue for “carbon fixation” and “zero emission”, and the carbonized products have multiple application potentials. However, there have been no specific research to study the differences in macro- and micro-morphology, electrical properties and many other aspects of the products obtained from carbonization of pure cellulose, pure lignin or their complex, lignocellulose. In this work, lignocellulose with cellulose to lignin mass ratio of 10:1 is obtained using p-toluenesulfonic acid hydrolysis followed by homogenization process at a controlled condition. Then, carbon heterostructure with fibers and sheets (CH-10) are obtained by pyrolysis at 1500 ℃. Detailed results imply that the fiber-like carbon structure possesses high crystallinity and low defect density, coming from carbonization of the cellulose content in lignocellulose (LC) nanofibers. Correspondingly, the graphite-like carbon sheet with high defect density and low crystallinity comes from carbonization of the lignin content in LCs. Further investigation indicates CH-10 possesses enhanced polarization and moderate impedance matching which makes it an ideal candidate for electromagnetic wave (EMW) absorption. CH-10 exhibits an excellent EMW absorption performance with a minimum RL value of -50.05 dB and a broadest absorption bandwidth of 4.16 GHz at a coating thickness as thin as 1.3 mm.

关键词: Carbon heterostructure, Conductive loss, Pyrolysis, Interface, Bamboo lignocellulose, Nanostructure

Abstract: Biomass-derived residue carbonization has been an important issue for “carbon fixation” and “zero emission”, and the carbonized products have multiple application potentials. However, there have been no specific research to study the differences in macro- and micro-morphology, electrical properties and many other aspects of the products obtained from carbonization of pure cellulose, pure lignin or their complex, lignocellulose. In this work, lignocellulose with cellulose to lignin mass ratio of 10:1 is obtained using p-toluenesulfonic acid hydrolysis followed by homogenization process at a controlled condition. Then, carbon heterostructure with fibers and sheets (CH-10) are obtained by pyrolysis at 1500 ℃. Detailed results imply that the fiber-like carbon structure possesses high crystallinity and low defect density, coming from carbonization of the cellulose content in lignocellulose (LC) nanofibers. Correspondingly, the graphite-like carbon sheet with high defect density and low crystallinity comes from carbonization of the lignin content in LCs. Further investigation indicates CH-10 possesses enhanced polarization and moderate impedance matching which makes it an ideal candidate for electromagnetic wave (EMW) absorption. CH-10 exhibits an excellent EMW absorption performance with a minimum RL value of -50.05 dB and a broadest absorption bandwidth of 4.16 GHz at a coating thickness as thin as 1.3 mm.

Key words: Carbon heterostructure, Conductive loss, Pyrolysis, Interface, Bamboo lignocellulose, Nanostructure