期刊
JOURNAL OF MEMBRANE SCIENCE
卷 631, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2021.119333
关键词
Microporous formation mechanism; PTFE fibers; Isotactic polypropylene; Microporous membranes
资金
- National Natural Science Foundation of China [51873112]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51721091]
The study revealed a new formation mechanism of PP microporous membranes, which utilizes the interface separation of PTFE fibers and PP matrix during stretching to create a microporous structure. Membranes fabricated using this method exhibited narrower pore size distribution, higher porosity, higher N2 flux, and pure water flux compared to beta-PP membranes.
Studying microporous formation and evolution mechanism plays a crucial role in fabricating high-performance microporous membranes. A formation mechanism of PP microporous membranes, different from those reported previously, was proposed based on the interface separation of PTFE fibers and PP matrix during sequential biaxial stretching. The experimental results indicated that the initial microcracks, which were filled by microfibrillated PP, were originated from PTFE fibers-PP matrix interfaces perpendicular to the longitudinal stretching direction. As the strain increased, microfibrillated PP was further elongated, ultimately forming microfibrillated PP membranes at a relatively low strain (200%). The subsequent transverse stretching caused the separation of fibrillated PP to form an excellent microporous structure. As a result, PTFE/PP membranes after biaxial stretching exhibited the narrower pore size distribution, higher porosity, higher N2 flux and pure water flux than beta-PP membranes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据