Optimization of polyacrylonitrile precursor and preparation of hollow carbon nanofibers
LI Shu-feng1,2, LUO Yong-sha2, XU Jing-wei2, YUAN Liang2, HAI Dian2
1. Key Laboratory of Advanced Textile Composite Materials of the Ministry of Education, Tiangong University, Tianjin 300387, China; 2. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
Abstract: To prepare polyacrylonitrile (PAN) based hollow carbon nanofibers with good mechanical properties through coaxial electrospinning,the orthogonal experiment is at first used to optimize the polymerization of PAN.Then,PAN suitable for spinning is selected to perform coaxial electrospinning,pre-oxidization and carbonization.Finally,the obtained PAN-based hollow carbon nanofibers are characterized.The experimental results show that the initiator dosage has the biggest impact on the relative viscosity-average molecular weight of PAN,the content of itaconic acid,the second co-monomer,has the greatest influence on cyclization heat release,and the content of methyl acrylate,the third co-monomer,has the largest effect on the yield of PAN polymerization.SEM analysis reveals that the cross section of the prepared PAN-based hollow carbon nanofibers shows obvious hollow structure and compact surface.BET test shows that the pore volume of the nanofibers is 0.069 69 cm3·g-1,and total specific surface area is 55.719 m2·g-1.
李树锋, 罗永莎, 徐经伟, 袁亮, 海滇. 聚丙烯腈前驱体的优化及其中空碳纳米纤维的制备[J]. 现代化工, 2019, 39(11): 108-112.
LI Shu-feng, LUO Yong-sha, XU Jing-wei, YUAN Liang, HAI Dian. Optimization of polyacrylonitrile precursor and preparation of hollow carbon nanofibers. Modern Chemical Industry, 2019, 39(11): 108-112.
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