超临界CO2诱导相分离法制备石墨烯改性PVDF膜的研究  

Study on Graphene-Modified PVDF Membrane Fabricated by Supercritical CO2-Induced Phase Separation

作　　者：吴艳[1] 向艳慧[1] 徐意[1] 林海波[2] 龚正朋[1] 余健[1] 李兴俊[1] 王记彩[1] 覃宗盛 WU Yan;XIANG Yanhui;XU Yi;LIN Haibo;GONG Zhengpeng;YU Jian;LI Xingjun;WANG Jicai;QIN Zongsheng(Jiaxing Nanyang Polytechnic Institute, Jiaxing 314003, China;Ningbo Institute of Materials Technology &Engineering, Chinese Academy of Sciences, Ningbo 315201, China)

机构地区：[1]嘉兴南洋职业技术学院,浙江嘉兴314003 [2]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《中国塑料》2019年第6期56-62,共7页China Plastics

基　　金：浙江省教育厅一般科研项目(Y201738733),浙江省教育厅一般科研项目(Y201738721)

摘　　要：以聚偏氟乙烯(PVDF)为基体,N,N二甲基甲酰胺(DMF)为溶剂,通过超临界CO2诱导相转化法制备PVDF/石墨烯微孔膜,并对其微观形貌、热稳定性能、热力学性能、晶型转化和亲水性能等进行表征。结果表明,在8MPa,45℃的制备条件下,低含量石墨烯掺杂比可以制备得到良好网络结构的PVDF微孔膜,孔径和粗糙度均有所降低,亲水性能提高,整体热稳定性提高;石墨烯添加对微孔膜热力学性能的影响较小,但增强了PVDF晶型转换,趋向于形成更多的β或γ晶型。A type of graphene-modified polyvinylidene fluoride (PVDF) membranes were fabricated by supercritical CO2-induced phase separation using DMF as a solvent, and their morphology, thermal stability, thermodynamic properties, crystal transformation and hydrophilicity were studied. The results indicated that the microporous membranes obtained a good network structure at a low content of graphene under the process conditions of 8 MPa and 45 ℃. The pore size and roughness of the membranes were found to decrease, and however their hydrophilicity and thermal stability were improved. In addition, the introduction of graphene had little effect on thermodynamic properties but enhanced the transition of crystal form to form more β or γ crystals.

关 键 词：聚偏氟乙烯 石墨烯 微孔膜 形貌 热稳定 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]