Preparation of porous polyacrylonitrile fibers by electrospinning a ternary system of PAN/DMF/H2O

被引：85

作者：

Yu, Xiaolan

Xiang, Haifan

Long, Yuhua

Zhao, Ning

Zhang, Xiaoli

Xu, Jian ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Inst Chem, Beijing 100190, Peoples R China

来源：

MATERIALS LETTERS | 2010年 / 64卷 / 22期

基金：

美国国家科学基金会;

关键词：

Electrospinning; Polyacrylonitrile; Porosity; Ternary system; Phase diagram; NANOFIBERS; POLYMER;

D O I：

10.1016/j.matlet.2010.08.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polyacrylonitrile (PAN) porous fibers were prepared in one step by electrospinning a ternary system of PAN/N, N-dimethylformamide (DMF)/water at ambient environment. The formation of porous structures was mainly due to the spinodal decomposition phase separation occurred during the electrospinning process The concentration of PAN varied from 3 to 10 wt % with the water content changing from 2 to 8 wt % When PAN concentration was above 5 wt %, the composition of the ternary system was close to the "cloud point" and fibers with porous structures were obtained In addition, the surface tension and viscosity of PAN solutions increased with water which may lead to the diameter increase of the fibers. The Brunauer-Emmett-Teller (BET) surface area of porous PAN nanofibers obtained from 8 wt.% PAN solution containing 7 wt % of water was 46.4 m(2)g(-1), which was 3 times higher than that of nonporous PAN nanofibers prepared under the same conditions from a solution without water. (C) 2010 Elsevier B.V. All rights reserved

引用

页码：2407 / 2409

页数：3

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