Thoughts on preparation technology of high performance polyacrylonitrile-based carbon fibers [高性能聚丙烯腈基碳纤维制备技术几点思考]

作者：Zhang Z.; Xu W.; Kang H.; Xu J.; Liu R.^*

来源：Journal of Textile Research, 2019, 40(12): 152-161.

DOI：10.13475/j.fzxb.20190905410

• Continuous polymerization
• Micro-void
• Phase separation
• Polyacrylonitrile-based carbon fiber
• Structure and property

Polyacrylonitrile (PAN)-based carbon fibers were developed rapidly in the past twenty years in China. Based on the current state of the development of PAN-based carbon fibers, basic problems in the production process of PAN-based carbon fibers were considered and summarized. In the preparation of PAN spinning solution, continuous polymerization of PAN was realized by the cooperation of polymerization process and equipment, by which homogeneous PAN spinning solution with stable properties can be prepared. In the preparation of PAN precursor fibers, the phase separation process of PAN spinning solution was controlled by coagulation parameters to reduce the size of micro-pores formed during phase separation. The drying and hot-drawing procedures, the temperature, humidity and tension were carefully controlled to optimize the micro-pores fusion, crystallization and orientation of PAN molecule to prepare high-quality PAN precursor. In the stabilization and carbonization procedures, the skin-core and turbostratic graphite structure were controlled by adjusting temperature and stress fields to control the structure and properties of the resultant PAN-based carbon fibers.

• 单位
  中国科学院大学