Abstract

Nanofiller reinforcement is an effective approach to realize high performance of regular synthetic fibers. In this paper, graphene oxide nanoribbons (GONRs) with complete morphology were prepared via unzipping single-walled carbon nanotubes (SWCNTs) through long-time freeze-drying after oxidation. GONRs derived from SWCNTs (SGONRs) did not need any modification and could be directly added to poly(vinyl alcohol) (PVA) to form uniform dispersions and then continuous fibers were fabricated using wet spinning and hot-drawing. SGONRs provided abundant hydrogen bonding interaction with PVA chains, so SGONRs could not only obviously improve the dispersibility in PVA, but also enhance the mechanical properties of the composites. The tensile strength of PVA/SGONRs composite fibers with 0.4 wt% loading of SGONRs reach 1032 MPa, improved by 121 % compared with PVA/SWCNTs fiber, and by 200% with PVA fiber, respectively.

中文翻译：

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通过冷冻干燥获得具有完整形态的单壁氧化石墨烯纳米带的增强而生产的具有优异机械性能的聚乙烯醇纤维

抽象的

纳米填料增强是实现常规合成纤维高性能的有效方法。本文通过氧化后长时间冷冻干燥解压缩单壁碳纳米管（SWCNT），制备了具有完整形态的氧化石墨烯纳米带（GONR）。衍生自SWCNTs（SGONRs）的GONRs不需要进行任何修饰，可以直接添加到聚乙烯醇（PVA）中以形成均匀的分散体，然后使用湿法纺丝和热拉伸工艺制造连续纤维。SGONRs与PVA链具有丰富的氢键相互作用，因此SGONRs不仅可以明显提高其在PVA中的分散性，而且可以增强复合材料的力学性能。SGONRs负载量为0.4 wt％时，PVA / SGONRs复合纤维的拉伸强度达到1032 MPa，