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Chemistry and Industry of Forest Products ›› 2021, Vol. 41 ›› Issue (2): 33-38.doi: 10.3969/j.issn.0253-2417.2021.02.005

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Effect of Temperature on Curing Performance of Lignin-based Phenolic Resin Fibers

Xin LI1,3, Yu REN1, Jianxiang LIU1, Zhengjun SHI1, Zhifeng ZHENG2, Can LIU1,*()   

  1. 1. Key Laboratory of National Forestry and Grassland Administration for Highly-Efficient Utilization of Forest Biomass Resources in the Southwest China, Southwest Forestry University, Kunming 650224, China
    2. College of Energy, Xiamen University, Xiamen 361102, China
    3. Rongxian Natural Resources and Planning Bureau, Zigong 643100, China
  • Received:2020-10-06 Online:2021-04-28 Published:2021-05-08
  • Contact: Can LIU E-mail:liucan@swfu.edu.cn


In order to study the influence of temperature factors on the properties of lignin phenolic resin fiber, different heating rates and curing reaction temperatures were set under the curing bath condition with the hydrochloric acid/formaldehyde mass ratio of 1:1. The properties of the cured materials were characterized by FT-IR, TG, DSC, and mechanical property test. The effects of different temperatures on the mechanical properties, thermal properties and surface morphology of the fibers were investigated, and the curing behavior of lignin phenolic fibers was studied. The results showed that the internal materials continued to cross-link and the diameter of the cured fibers was thicker than that of the raw fibers after curing. The degree of curing reaction and the thermal stability increased with the increase of heating rate. Too fast heating rate led to the decrease of mechanical properties. The higher the curing temperature was, the smoother the surface of lignin phenolic fiber was. The mechanical properties of the fibers decreased with the increase of curing temperature. The most suitable curing temperature factors were the curing heating rate of 20 ℃/h and curing temperature of 170 ℃. Under these conditions, the tensile strength of the cured fiber was 178.24 MPa, and the elongation at break was 1.49%.

Key words: lignin, phenolic resin, fiber, curing

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