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首页> 外文期刊>Physical review letters >Ribbon-to-Fiber Transformation in the Process of Spinning of Carbon-Nanotube Dispersion
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Ribbon-to-Fiber Transformation in the Process of Spinning of Carbon-Nanotube Dispersion

机译：碳纳米管分散体旋转过程中的碳带到纤维转变

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摘要

We describe a phenomenon of ribbon-to-fiber transformation observed in the process of spinning of single wall carbon nanotubes dispersed in polymer solutions. In the process of spinning, a gel-like ribbon comprised of nanotube bundles bound by polymer is withdrawn from a solvent bath. We show that upon crossing the liquid-air interface, the ribbon may either retain its flat shape or fold into a compact hairlike fiber. The ribbon-to-fiber transformation is caused by the capillary action of the liquid meniscus embracing the ribbon. Only sufficiently stiff ribbons can withhold the capillary compression. The critical conditions of folding, as well as the number of folds in the contractive ribbon, depend on the ribbon width, its flexural rigidity, and the solvent surface tension. We show that the ribbon rigidity can be efficiently modulated by varying the solvent composition, allowing us to control the pore structure of carbon-nanotube fibers.
机译：我们描述了在分散在聚合物溶液中的单壁碳纳米管的纺丝过程中观察到的碳带到纤维转变的现象。在纺丝过程中，从溶剂浴中取出由聚合物结合的纳米管束构成的凝胶状带。我们表明，在穿过液-气界面时，色带可能保持其扁平形状或折叠成紧密的毛状纤维。色带到纤维的转变是由液体弯月面包裹色带的毛细作用引起的。只有足够坚硬的色带才能阻止毛细管压缩。折叠的关键条件以及收缩色带的折数取决于色带的宽度，其抗弯刚度和溶剂表面张力。我们表明，通过改变溶剂成分可以有效地调节带的刚性，从而使我们能够控制碳纳米管纤维的孔结构。

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