文献类型：期刊文献

英文题名：Theoretical selection of solvent for production of electrospun PMMA fibers with wrinkled surfaces

作者：Li, Lu[1];Li, Ruosong[1];Li, Mengmeng[1];Rong, Zongming[2];Fang, Tao[1]

机构：[1]Xi An Jiao Tong Univ, Dept Chem Engn, Xian 710049, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2014

卷号：4

期号：53

起止页码：27914

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20142817932479);WOS:【SCI-EXPANDED(收录号:WOS:000339012400036)】；

基金：The authors would like to acknowledge the following financial supports: National Natural Science Foundation of China (no. 21376186), the Ministry of Education (Doctoral Special Research Foundation no. 20110201110032), China and the Fundamental Research Funds for the Central Universities (New Teacher Research Support Plan no. 08141002, International Cooperation Project no. 2011jdhz37 and Integrated Cross Project xjj2014136 in Xi'an Jiaotong University), Natural Science Basic Research Plan in Shaanxi Province of China (no. 2012JM2010), and the Ministry of Human Resources and Social Security of China (Sci. & Tech. Project for Overseas Scholars, no. 19900001).

语种：英文

外文关键词：Fibers - Phase separation - Esters - Graph theory - Electrospinning - Organic solvents - Spinodal decomposition

摘要：A Bagley graph is a 2D solubility chart that contains the Hansen solubility parameters of polymers and solvents to provide a systematic and theoretical method for selecting solvents during electrospinning. The interaction radius of the solubility circle of poly methyl methacrylate (PMMA) is 8.59 MPa0.5. In the Bagley graph of PMMA, ethanol is located outside of the solubility circle and is therefore a non-solvent for PMMA. In the current study, ethyl acetate (EA) was chosen as the solvent for electrospinning PMMA to investigate the effects of variations in the applied voltage and solution concentration on spinnability and fiber morphologies. Statistical analysis showed that varying the applied voltage (14-20 kV) and solution concentration (6-8%) does not produce a significant difference in average fiber diameter. The surface of the PMMA fiber was irregularly wrinkled due to spinodal decomposition from thermal induced phase separation. Software developed with the Delphi 7.0 programming language was used to predict the liquid-liquid phase separation of mixing systems. Conclusively, the wrinkling was caused by the thermodynamic instability of the polymer solution undergoing rapid volatilization of EA.