Journal of South China University of Technology(Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (2): 108-115.doi: 10.3969/j.issn.1000-565X.2017.02.015

• Materials Science & Technology • Previous Articles     Next Articles

Preparation and Properties of Polyimide Fiber Paper-Based Composite Materials

CHEN Gang1 WANG Chen-chen1 YAN Zhi-yuan2 FANG Zhi-qiang1 ZHU Peng-hui1   

  1. 1.State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.China Light Industry Wuhan Design &Engineering Co.,Ltd.,Wuhan 430000,Hubei,China
  • Received:2016-01-04 Revised:2016-04-26 Online:2017-02-25 Published:2016-12-31
  • Contact: 陈港( 1967-) ，男，教授，博士生导师，主要从事造纸技术与特种纸的研究． E-mail:papercg@scut.edu.cn
  • About author:陈港( 1967-) ，男，教授，博士生导师，主要从事造纸技术与特种纸的研究．
  • Supported by:
    Supported by the National Program on Key Basic Research Project of China( 973 Program) ( 2010CB732206)

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Abstract:

Polyimide fiber /epoxy paper-based composite materials were prepared from polyimide chopped fibers and polyimide fibrid fibers by means of wet papermaking combined with hot pressing and resin impregnation,and the effects of hot-pressing temperature,hot-pressing pressure and epoxy resin impregnation increment on the properties of polyimide fiber paper-based composite materials were investigated.The results show that ( 1) after the hot pressing,the contact area of polyimide fibers increases,which results in the improvement of mechanical and electrical properties of the polyimide fiber paper; ( 2) resin impregnation further improves the mechanical and electrical properties of polyimide fiber paper-based composite,concretely,the tensile index increases by 1. 25 fold and the dielectric strength increases by 17%; and ( 3) at a hot-pressing temperature of 210 ℃,a hot-pressing pressure of 120 N/mm and an impregnation increment of 20%,the composite possesses good mechanical and electrical properties,namely a tensile index of 57. 5 N·m/g,a tear index of 6. 86 mN·m2 /g and a dielectric strength of 12. 3 kV/mm,which means that the composite is potentially useful in such fields as aerospace,insulation barrier and environmental protection.

Key words: polyimide fiber paper, composite material, hot-pressing temperature, hot-pressing pressure, epoxy resin, impregnation, mechanical property, electrical property