Enhancement of solvent uptake in porous PVDF nanofibers derived by a water-mediated electrospinning technique

作     者：Gajula Prasad Jun-Wei Liang Wei Zhao Yingbang Yao Tao Tao Bo Liang Sheng-Guo Lu 

作者机构：Guangdong Provincial Research Center on Smart Materials and Energy Conversion DevicesGuangzhou510006China Guangdong Provincial Key Laboratory on the Functional Soft Condensed MatterGuangzhou510006China School of Materials and EnergyGuangdong University of TechnologyGuangzhou510006China Dongguan South China Design Innovation InstituteBuilding D-1University Innovation City AreaSongshan LakeDongguan523808China 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2021年第7卷第2期

页      面：244-253页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 070303[理学-有机化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the Natural Science Foundation of China(Grant No.51372042,51872053) Guangdong Provincial Natural Science Foundation(2015A030308004) the NSFCGuangdong Joint Fund(Grant No.U1501246). 

主　　题：Polyvinylidene fluoride Electrospinning Thermally induced phase separation Viscosity Porous fibers Discharge capacity Solvent uptake 

摘      要：The effect of a N,N-dimethylformamide(DMF)/acetone solvent system(3:7,4:6,5:5,6:4,7:3)and spinning medium(air and water)on the membrane morphology and the structure-property relationship were investigated.A facile method was optimized to generate a porous,polymer-fiber membrane via the combinative effect of electrospinning and thermally inducing phase separation of the DMF/acetone(4:6)solvent system in a water medium.The attenuated total reflection(ATR)-Fourier transform infrared(FTIR)results showed an increased b-phase compared to the pristine poly(vinylidene fluoride)(PVDF).The XRD and DSC results further confirmed that the co-existing a-and b-phases in the pristine PVDF were converted into a unique b-phase in the electrospun membranes.In addition,the solvent uptake percentage of the DMF/acetone(4:6)solvent system in a water medium(540)is much greater than that in an air medium(320),and over two times better than that of commercial polyethylene(PE)membranes(190).Similarly,the discharge capacity of the PVDF membrane separator prepared with the DMF/acetone(4:6)solvent system in a water medium is higher than that of the air medium.This enhancement of solvent uptake might be due to the interconnected porous morphology present in the water medium.