A Novel Non-Planar Transverse Stretching Process for Micro-Porous PTFE Membranes and Resulting Characteristics

Type
Article

Authors
Chang, Y.-H.
Chen, S.-C.
Wang, T.-J.
Guo, J.

KAUST Department
Department of Chemical Engineering, King Abdullah University of Science and Technology, Jeddah, Saudi Arabia

Online Publication Date
2018-02-26

Print Publication Date
2018-03-02

Date
2018-02-26

Abstract
Polytetrafluoroethylene (PTFE) micro-porous membranes were prepared from PTFE fine powder through extruding, rolling, and uniaxial longitudinally stretching. In contrast to conventional planar transverse stretching, a novel 3D mold design of non-planar transverse stretching process was employed in this study to produce micro-porous structure. The morphology, membrane thickness, mean pore size, and porosity of the PTFE membrane were investigated. The results show that the non-planar transverse stretched membranes exhibit more uniform average pore diameter with thinner membrane thickness. Morphological changes induced by planar and non-planar transverse stretching for pore characteristics were investigated. The stretching conditions, stretching temperature and rate, affect the stretched membrane. Increasing temperature facilitated the uniformity of pore size and uniformity of membrane thickness. Moreover, increase in stretching rate resulted in finer pore size and thinner membrane.

Citation
Chang Y-H, Chen S-C, Wang T-J, Guo J (2018) A Novel Non-Planar Transverse Stretching Process for Micro-Porous PTFE Membranes and Resulting Characteristics. International Polymer Processing 33: 20–28. Available: http://dx.doi.org/10.3139/217.3309.

Publisher
Carl Hanser Verlag

Journal
International Polymer Processing

DOI
10.3139/217.3309

Additional Links
http://www.hanser-elibrary.com/doi/10.3139/217.3309

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