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Wicking-Driven Evaporation Self-Assembly of Carbon Nanotubes on Fabrics: Generating Controlled Orientational Structures
Langmuir ( IF 3.9 ) Pub Date : 2020-11-11 , DOI: 10.1021/acs.langmuir.0c02436
Chenglong Li 1 , Chuntao Lan 1 , Min Guo 1 , Ni Wang 1 , Ying Ma 1, 2
Affiliation  

Nanostructures with orientational order exhibit excellent electrical and optical properties; however, their construction on complex fabrics is challenging. Here, we demonstrate the potential of wicking-driven evaporation self-assembly in the oriented arrangement of carbon nanotubes (CNTs) on fabrics. The solution-evaporation self-assembly in combination with the fabric wicking effect leads to convective flows along the fibers, which makes it possible to prepare orientational nanostructures over large fabric surface areas. The orientation of CNTs is controlled by the fluid drag force from the convective flow during drying, thus the interaction between the CNT and the solution is crucial. We show that the nanostructures of CNTs on fibers depend, for example, on the evaporation temperature, component concentration, and solution pH. Weakening the viscous connection of the fluid with CNTs can lead to an interesting eddy nanostructure of CNTs. The electrical conductivity of the assembled fabrics increases strongly with the degree of orientation and the assembly cycles of CNTs. In this work, the large-scale orientational order of nanomaterial achieved by wicking-driven evaporation self-assembly offers a new strategy for constructing three-dimensional oriented conductive networks in electronic textiles.

中文翻译:

碳纳米管在织物上的芯吸驱动蒸发自组装:生成受控的定向结构

具有定向顺序的纳米结构具有出色的电学和光学特性;然而,它们在复杂织物上的构造具有挑战性。在这里,我们展示了在织物上碳纳米管(CNT)的定向排列中,芯吸驱动的蒸发自组装的潜力。溶液蒸发的自组装与织物芯吸作用相结合,导致沿纤维的对流流动,这使得可以在较大的织物表面积上制备取向纳米结构。CNT的取向受干燥过程中对流的流体阻力控制,因此CNT与溶液之间的相互作用至关重要。我们表明,碳纳米管在纤维上的纳米结构取决于,例如,蒸发温度,组分浓度和溶液pH值。减弱流体与CNT的粘性连接会导致CNT有趣的涡流纳米结构。组装好的织物的电导率随着CNT的取向程度和组装周期而大大增加。在这项工作中,通过芯吸驱动的蒸发自组装实现的纳米材料的大规模取向顺序为在电子纺织品中构建三维取向的导电网络提供了新的策略。
更新日期:2020-11-25
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