高耐热交联聚乙烯微孔膜的制备及性能研究  

Preparation and properties of high heat-resistant crosslinked polyethylene microporous membrane

作　　者：任冬雪 孙小杰 梁文斌 REN Dongxue;SUN Xiaojie;LIANG Wenbin(National Institute of Clean-and-Low-Carbon Energy,Beijing 102209,China)

机构地区：[1]北京低碳清洁能源研究院

出　　处：《膜科学与技术》2019年第6期80-86,共7页Membrane Science and Technology

摘　　要：以HDPE为原料,利用化学交联方法和热致相分离原理制备交联聚乙烯(XLPE)微孔膜.研究了稀释剂含量对XLPE材料流变性能、熔融结晶性能和成孔性能的影响,同时考察了XLPE微孔膜的耐热性.结果表明,稀释剂的含量越高,可控XLPE的加工性越好,安全加工窗口越宽.XLPE膜片的凝胶含量、熔点、结晶度等性能参数均随稀释剂加入量的增加而降低.XLPE微孔膜破膜温度比现有湿法UHMWPE膜片的破膜温度提高了30℃,耐热性优异,在拓宽锂离子电池隔膜安全窗口、提高锂离子电池安全性上有潜在应用价值.Crosslinked polyethylene(XLPE) microporous membrane was prepared by thermal induced phase separation(TIPS) with HDPE. The effects of diluent content on rheological property, melting crystallization property and pore-forming property of XLPE materials were investigated. The heat resistance of XLPE microporous membrane was also investigated. The results showed that higher diluent content contributed to good processing property and wider safety processing window. The gel content, melting point, crystallinity of the XLPE membrane decreased with increasing content of diluent. XLPE microporous membrane has excellent heat resistance. The rupture temperature of XLPE microporous membrane is 30 ℃ higher than that of the UHMWPE microporous membrane, and the heat resistance is excellent. It has potential application value in broadening the safety window of lithium ion battery separator and improving the safety of lithium ion battery.

关 键 词：聚乙烯 耐热性 微孔膜 

分 类 号：TQ316.6[化学工程—高聚物工业]