Publication Date:
2016-02-13
Description:
Poly(tetrafluoroethylene) (PTFE) porous hollow fiber membranes were prepared by a method involving billet preform, paste extrusion, stretching and sintering. A tensile tester was used during the stretching process to control the speed and evaluate the impact of stretching. The influence of stretching parameters including stretching ratio, temperature and speed was systematically investigated. The structure and properties of PTFE hollow fiber membranes were characterized by field emission scanning electron microscopy (FESEM), filtration performance and mechanical strength test. The results indicate that the stretching ratio is the most significant influencing factor for the formation of various regions in stress-strain curve. With the increasing stretching ratio, porosity, maximum pore size and ethanol flux increase remarkably while BSA rejection decreases. This work has a potential to facilitate PTFE membrane fabrication with finely-tuned micro-porous structure for various application processes.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
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