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首页> 美国卫生研究院文献>Polymers >The Structure and Properties of Polyacrylonitrile Nascent Composite Fibers with Grafted Multi Walled Carbon Nanotubes Prepared by Wet Spinning Method
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The Structure and Properties of Polyacrylonitrile Nascent Composite Fibers with Grafted Multi Walled Carbon Nanotubes Prepared by Wet Spinning Method

机译：湿纺法制备多壁碳纳米管接枝聚丙烯腈复合纤维的结构与性能

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摘要

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.
机译：通过在水性溶剂中原位聚合合成聚丙烯腈（PAN）接枝的氨基官能化多壁碳纳米管（氨基MWCNTs）。采用湿纺法制备了接枝的MWCNT / PAN新生复合纤维。傅立叶变换红外光谱和拉曼光谱表明，氨基MWCNTs和PAN大分子链具有界面相互作用并形成化学键。通过热重量分析，PAN聚合物在氨基MWCNT上的接枝含量高达73.2％。接枝MWCNT的加入改善了PAN新生纤维的结晶度和晶体尺寸，并改变了在空气气氛中放热过程中的热性能。形态分析和力学性能测试表明，接枝的MWCNT / PAN新生复合纤维具有较均匀的直径分布和较大的直径，其拉伸强度和拉伸模量高于对照PAN新生纤维。

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