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Biomass Chemical Engineering ›› 2019, Vol. 53 ›› Issue (2): 26-34.doi: 10.3969/j.issn.1673-5854.2019.02.005

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Preparation and Properties of Melt-spun Kraft Hardwood Lignin-based Activated Carbon Fibers

Erqiang YIN,Shichao WANG,Hengxue XIANG,Zhe ZHOU*(),Meifang ZHU   

  1. State Key Laboratory for Modification of Chemical Fibers and Ploymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
  • Received:2018-02-07 Online:2019-03-30 Published:2019-04-09
  • Contact: Zhe ZHOU E-mail:zzhe@dhu.edu.cn
  • Supported by:


Kraft hardwood lignin activated carbon fiber(HKL-ACF) was prepared from carbon fiber(HKL-CF) by water vapor activation using melt-spun kraft hardwood lignin(HKL) fiber as raw material. On this basis, the effects of water vapor activation on the chemical structure and morphology of activated carbon fibers were investigated by infrared spectrometer and scanning electron microscopy. And the effects of different activation time, activation temperature and water vapor flow rate on specific surface area, pore structure and microcrystalline structure of the carbon fiber were studied by automatic physical adsorption instrument, X-ray diffractometer and Raman spectrometer. The results showed that the chemical structure of carbon fiber was changed greatly after water vapor activation, and the contents of C—O and C=C were increased. At the same time, the specific surface area increased with the increase of activation time, and increased firstly and then decreased with the increase of activation temperature and water vapor flow rate. With the increase of activation time and temperature, the grain size became smaller. The degree of graphitization of the fiber surface became larger with the increase of activation time. The maximum BET specific surface area of activated carbon fiber was 2 081.34 m2/g and the maximum pore volume was 1.60 cm3/g under the activation temperature of 800 ℃, activation time of 4 h, and water vapor flow rate of 1 mL/min.

Key words: Kraft hardwood lignin, melt spinning, water vapor activation, activated carbon fiber

CLC Number: