The Structure and Properties of Polyacrylonitrile Nascent Composite Fibers with Grafted Multi Walled Carbon Nanotubes Prepared by Wet Spinning Method

Hailong Zhang; Ling Quan; Aijun Gao; Yuping Tong; Fengjun Shi; Lianghua Xu

doi:10.3390/polym11030422

The Structure and Properties of Polyacrylonitrile Nascent Composite Fibers with Grafted Multi Walled Carbon Nanotubes Prepared by Wet Spinning Method

Polymers (Basel). 2019 Mar 5;11(3):422. doi: 10.3390/polym11030422.

Authors

Hailong Zhang^{1

2}, Ling Quan³, Aijun Gao⁴, Yuping Tong⁵, Fengjun Shi⁶, Lianghua Xu⁷

Affiliations

¹ School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China. zhanghailongql@163.com.
² Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China. zhanghailongql@163.com.
³ School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China. quanling@ncwu.edu.cn.
⁴ Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China. bhgaoaijun@163.com.
⁵ School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China. tongyuping@ncwu.edu.cn.
⁶ School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China. shifengjun1962@126.com.
⁷ Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China. xulh@mail.buct.edu.cn.

Abstract

Polyacrylonitrile (PAN) grafted amino-functionalized multi walled carbon nanotubes (amino-MWCNTs) were synthesized by in situ polymerization under aqueous solvent. The grafted MWCNT/PAN nascent composite fibers were prepared by the wet spinning method. Fourier transform infrared spectroscopy and Raman spectroscopy indicated that the amino-MWCNTs and PAN macromolecular chains had interfacial interactions and formed chemical bonds. The grafting content of the PAN polymer on the amino-MWCNTs was up to 73.2% by thermo gravimetric analysis. The incorporation of the grafted MWCNTs improved the degree of crystallization and crystal size of PAN nascent fibers, and changed the thermal properties during exothermic processing in an air atmosphere. Morphology analysis and testing of mechanical properties showed that the grafted MWCNT/PAN nascent composite fibers with a more uniform diameter distribution and larger diameter had higher tensile strength and tensile modulus than the control PAN nascent fibers.

Keywords: morphological structure; multi walled carbon nanotubes; nascent fiber; polyacrylonitrile; thermal properties.