基于纳米碳纤维的碳碳复合纤维。

IF 4.703 3区 材料科学
Nitilaksha Hiremath, Sunay Bhat, Ramiz Boy, Maria Cecilia Evora, Amit K. Naskar, Jimmy Mays, Gajanan Bhat
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引用次数: 0

摘要

纺织级聚丙烯腈(PAN)被用作制备碳纤维的前体材料。经电子束辐照的聚丙烯腈接枝碳纳米纤维分散在聚丙烯腈溶液(溶于二甲基甲酰胺)中。注入聚丙烯腈溶液的碳纳米纤维(CNF)在实验室规模的湿法纺丝装置上进行湿法纺丝,形成直径为 50 至 70 µm 的纤维,其中包括 3.2 wt.% CNF-PAN、6.4 wt.% CNF-PAN 和纯 PAN。使用各种技术对原丝的热性能、机械性能和形态性能进行了表征。拉伸原丝纤维可进一步提高聚合物链的取向并凝聚空隙,与未拉伸纤维相比,拉伸强度和模量提高了 150% 以上。与原始 PAN 纤维相比,碳化后的原丝复合纤维强度提高了四倍,刚度提高了 14 倍。碳-碳复合纤维还通过 SEM/FIB、XRD 和拉伸强度进行了进一步表征。性能的改善取决于碳纳米纤维的均匀分布,而碳纳米纤维的表面改性进一步提高了其在复合纤维中的分散性。此外,与 PAN 纤维中 6.4 重量百分比的碳纳米管相比,PAN 纤维中 3.2 重量百分比的碳纳米管对性能的改善最大,这表明由于纳米纤维的均匀分布面临挑战,性能的改善经历了一个最大值,然后下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Carbon nanofibers based carbon–carbon composite fibers

Carbon nanofibers based carbon–carbon composite fibers

Textile grade polyacrylonitrile (PAN) was used as a precursor material for carbon fiber preparation. E-beam irradiated polyacrylonitrile grafted carbon nanofibers were dispersed in polyacrylonitrile solution (dissolved in dimethyl formamide). Carbon nanofibers (CNF) infused polyacrylonitrile solution was wet spun on a lab-scale wet-spinning setup to form 50 to 70 µm diameter fibers with 3.2 wt.% CNF-PAN, 6.4 wt.% CNF-PAN, and neat PAN. Precursor fibers were characterized for thermal, mechanical and morphological properties using various techniques. Drawing the precursor fibers further enhanced polymer chain orientation and coalesced the voids, enhancing tensile strength and modulus by more than 150% compared to those of the undrawn fibers. Precursor composite fibers on carbonization showed enhanced strength, compared to that of pristine PAN fibers, by four times and stiffness by 14 times. The carbon–carbon composite fibers were further characterized with SEM/FIB, XRD and tensile strength. The property improvements were dependent on the uniform distribution of carbon nanofibers, and surface modification of carbon nanofibers further enabled their dispersion in the composite fibers. Furthermore, 3.2 wt.% CNFs in PAN fibers showed maximum improvement in properties compared to 6.4 wt.% CNF in PAN fibers, indicating that the property enhancements go through a maximum and then drop off due to challenge in getting uniform distribution of nanofibers.

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来源期刊
Nanoscale Research Letters
Nanoscale Research Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
15.00
自引率
0.00%
发文量
110
审稿时长
2.5 months
期刊介绍: Nanoscale Research Letters (NRL) provides an interdisciplinary forum for communication of scientific and technological advances in the creation and use of objects at the nanometer scale. NRL is the first nanotechnology journal from a major publisher to be published with Open Access.
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