静电纺EVOH-SO3 Li/PEGDMA隔膜的性能  

Performance of Electrospinning EVOH-SO3 Li/PEGDMA Diaphragm

作　　者：巩桂芬[1] 徐阿文 王磊[1] 戴绍仕[2] GONG Gui-fen;XU A-wen;WANG Lei;DAI Shao-shi(School of Material Science and Engineering,Harbin University of Science and Technology,Harbin 150080,China;School of Naval Architecture,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150080 [2]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨理工大学学报》2019年第3期100-105,共6页Journal of Harbin University of Science and Technology

基　　金：山东省自然科学基金(ZR2011EMQ014);国家自然科学基金(5160030627)

摘　　要：用聚乙二醇二甲基丙烯酸酯(PEGDMA)改性聚乙烯-乙烯醇磺酸锂(EVOH-SO3Li),采用高压静电纺丝技术纺成相互交错结构的纤维隔膜。对制备的隔膜分别进行化学结构、微观形貌、吸液率和孔隙率、胀缩率、机械性能和热性能(TG和DSC)的测试和分析。结果表明:EVOHSO3Li/PEGDMA复合隔膜材料的纤维丝光滑、粗细均匀、无珠体结构;与EVOH-SO3Li隔膜材料相比,在EVOH-SO3Li/PEGDMA质量比为100/40时复合隔膜的综合性能最佳,孔隙率和吸液率分别为60%和258%,复合隔膜材料的胀缩率和拉伸强度都有所提高,分别为1.42和5.2 MPa;加入PEGDMA改性后的隔膜的热分解性能基本不变,起始热分解温度为270℃。Interchangeable structure of the fibrous separator was formed by lithium ethylene-vinyl alcohol copolymer sulfate(EVOH-SO 3Li)modified polyethylene glycol dimethacrylate(PEGDMA)using high-voltage electrostatic spinning technology.The mechanical properties,microstructure,absorbency and porosity,shrinkage rate,mechanical properties and thermal properties(TG and DSC)were tested and analyzed.The results showed that the fiber of EVOH-SO 3Li/PEGDMA separator composite was smooth with uniform thickness and non-bead structure.Compared with the EVOH-SO 3Li separator,the separator composite with the EVOH-SO 3Li/PEGDMA mass ratio of 100/40 has the best overall performance with the porosity and liquid absorption of 60%and 258%respectively.The shrinkage and tensile strength of the separator composite has increased-1.42 and 5.2 MPa respectively.The thermal decomposition performance of the modified PEGDMA separator was almost unchanged,and the initial thermal decomposition temperature was 270℃.

关 键 词：静电纺丝 PEGDMA 锂电池隔膜 EVOH 

分 类 号：TM215[一般工业技术—材料科学与工程]