论文摘要
Fabrication of highly ordered and dense nanofibers assemblies is of key importance for high-performance and multi-functional material and device applications. In this work, we design an experimental approach in silico, where shear flow and solvent evaporation are applied to tune the alignment, overlap of nanofibers, and density of the assemblies. Microscopic dynamics of the process are probed by dissipative particle dynamics simulations, where hydrodynamic and thermal fluctuation effects are fully modeled. We find that microstructural ordering of the assembled nanofibers can be established within a specific range of the Peclet numbers and evaporation rates, while the properties of nanofibers and their interaction are crucial for the local stacking order. The underlying mechanisms are elucidated by considering the competition between hydrodynamic coupling and thermal fluctuation. Based on these understandings, a practical design of flow channels for nanofiber assembly with promising mechanical performance is outlined.
论文目录
文章来源
类型: 期刊论文
作者: GAO EnLai,WANG ShiJun,DUAN ChuanHua,XU ZhiPing
来源: Science China(Technological Sciences) 2019年09期
年度: 2019
分类: 工程科技Ⅱ辑,工程科技Ⅰ辑
专业: 有机化工,材料科学
单位: Applied Mechanics Laboratory, Department of Engineering Mechanics, and Center for Nano and Micro Mechanics,Tsinghua University,Department of Mechanical Engineering, Boston University,Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering,Southwest Jiaotong University
基金: supported by the Opening Project of Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province(Grant No.SZDKF-1601),the National Natural Science Foundation of China(Grant Nos.11222217,11472150)
分类号: TQ340.1;TB383.1
页码: 1545-1554
总页数: 10
文件大小: 2578K
下载量: 4
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