Investigation of Voids in Polyacrylonitrile Fibers by USAXS and SAXS

doi:10.1007/s40242-019-9202-6

Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (6): 1070-1075.doi: 10.1007/s40242-019-9202-6

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Investigation of Voids in Polyacrylonitrile Fibers by USAXS and SAXS

TANG Haitong^1,2, MENG Fanling¹, LIU Yan³, JIN Shi², WANG Xiaodong¹, GAO Zhongmin⁴, CHE Xiaolei⁵

1. Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130012, P. R. China;
2. School of Material Science and Engineering, Jilin Jianzhu University, Changchun 130018, P. R. China;
3. First Hospital of Jilin University, Changchun 130021, P. R. China;
4. State Key Laboratory of Inorganic Synthesis&Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China;
5. College of Physics, Jilin University, Changchun 130012, P. R. China

Received:2019-07-29 Revised:2019-08-17 Online:2019-12-01 Published:2019-11-29
Contact: GAO Zhongmin, CHE Xiaolei E-mail:gaozm@jlu.edu.cn;chexl@jlu.edu.cn
Supported by:
Supported by the Special Foundation of the State Major Scientific Instrument and Equipment Development of China(No. 2012YQ24026407) and the Jilin Province/Jilin University Co-construction Project-Funds for New Materials, China(No. SXGJSF2017-3).

Abstract

Abstract: The void structure of polyacrylonitrile(PAN) fibers was investigated using ultra-small angle X-ray scattering(USAXS) and small angle X-ray scattering(SAXS). A quantitative method was developed to analyze connected USAXS/SAXS data and thus determine the void parameters of PAN fibers. The results showed that voids affected the mechanical performance of PAN fibers and were present throughout the entire wet-spinning process. When the absolute quantity and size of voids decreased, the tensile strength and modulus of PAN fibers increased. The void parameters were optimized by controlling the production process, and thus the tensile strength and modulus of PAN fibers were increased. The method for analyzing the void structure developed in this study is useful for analyzing voids over with larger size range, as well as the effect of the void structure on the mechanical performance of fibers.

Key words: Polyacrylonitrile (PAN) fiber, Void structure, Ultra-small angle X-ray scattering, Small angle X-ray scattering, Mechanical performance

TANG Haitong, MENG Fanling, LIU Yan, JIN Shi, WANG Xiaodong, GAO Zhongmin, CHE Xiaolei. Investigation of Voids in Polyacrylonitrile Fibers by USAXS and SAXS[J]. Chemical Research in Chinese Universities, 2019, 35(6): 1070-1075.

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Investigation of Voids in Polyacrylonitrile Fibers by USAXS and SAXS

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