文献类型：期刊文献

英文题名：Tailoring the morphologies of PVDF nanofibers by interfacial diffusion during coaxial electrospinning

作者：Ning, Jing[1];Yang, Miao[1,2];Yang, Hu[1];Xu, Zhenliang[1]

机构：[1]East China Univ Sci & Technol, Membrane Sci & Engn R&D Lab, Chem Engn Res Ctr, Shanghai 200237, Peoples R China;[2]Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Zhejiang, Peoples R China

年份：2016

卷号：109

起止页码：264

外文期刊名：MATERIALS & DESIGN

收录：;EI(收录号：20163002643900);WOS:【SCI-EXPANDED(收录号:WOS:000384105000029)】；

基金：The authors gratefully acknowledge the National Natural Science Foundation of China (No. 21276075) for financial support.

语种：英文

外文关键词：Coaxial electrospinning; PVDF; Morphologies; Interfacial diffusion

摘要：The morphology regulation of nanofiber (NF) plays an important role in its applications. In the present study, a simple method to tailor the cross-section morphology of polyvinylidene fluoride (PVDF) NFs by controlling the interfacial diffusion during coaxial electrospinning is presented. By choosing a soft bad-solvent of PVDF to prepare a partially miscible inner solution, the regulation of the interfacial diffusion can be simplified into the adjustment of the viscosity difference between the inner and outer solutions. When the viscosity of the inner solution surpassed that of the outer solution, the diffusion direction changed from outer-to-inner to inner-to-outer, which leaded to the change in the cross-section morphology of resultant NFs from a net-like to a hollow structure. Water contact angle also showed the effect caused by the interfacial diffusion. BET surface area of the as-prepared porous PVDF NFs can reach up to 42 m(2)/g, which is almost the highest data ever reported in the literature for polymer nanofiber. (C) 2016 Elsevier Ltd. All rights reserved.