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首页> 外文期刊>Nano letters >High-Strength Composite Fibers: Realizing True Potential of Carbon Nanotubes in Polymer Matrix through Continuous Reticulate Architecture and Molecular Level Couplings
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High-Strength Composite Fibers: Realizing True Potential of Carbon Nanotubes in Polymer Matrix through Continuous Reticulate Architecture and Molecular Level Couplings

机译：高强度复合纤维：通过连续的网状结构和分子水平偶联，实现聚合物基质中碳纳米管的真实潜力

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摘要

Carbon nanotubes have unprecedented mechanical properties as defect-free nanoscale building blocks, but their potential has not been fully realized in composite materials due to weakness at the interfaces. Here we demonstrate that through load-transfer-favored three-dimensional architecture and molecular level couplings with polymer chains, true potential of CNTs can be realized in composites as Initially envisioned. Composite fibers with reticulate nanotube architectures show order of magnitude improvement in strength compared to randomly dispersed short CNT reinforced composites reported before. The molecular level couplings between nanotubes and polymer chains results in drastic differences in the properties of thermoset and thermoplastic composite fibers, which indicate that conventional macroscopic composite theory falls to explain the overall hybrid behavior at nanoscale.
机译：碳纳米管具有前所未有的机械性能，可作为无缺陷的纳米级构建块，但由于界面处的弱点，其潜力尚未在复合材料中得到充分发挥。在这里，我们证明了通过有利于负载转移的三维结构以及与聚合物链的分子水平偶联，如最初设想的那样，可以在复合材料中实现CNT的真实潜力。与以前报道的随机分散的短CNT增强复合材料相比，具有网状纳米管结构的复合纤维强度提高了几个数量级。纳米管和聚合物链之间的分子级偶联导致热固性和热塑性复合纤维的性能发生巨大差异，这表明常规的宏观复合理论无法解释纳米级的整体杂化行为。

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