论文部分内容阅读
The majority of water filtration membranes are produced from fairly robust engineering polymers like PVDF and polymers of the polysulfone family (PSf/PES). Chemical properties such as oxidation resistance and long time stability in water are generally sufficient for most applications in water filtration. However, in some cases, the chemical stability of these polymers is insufficient.Poly(ethylene chlorotrifluoroethylene) (ECTFE) is a copolymer of ethylene and chlorotrifluoroethylene that has greater chemical and wear resistance than most other fluorinated polymers with an excellent combination of chemical and mechanical properties. In addition, ECTFE has good thermal stability as evidenced by a relatively high continuous use temperature more than 150℃. These attractive chemical, physical and mechanical properties make ECTFE a very desirable polymer for membrane applications.In this study, ECTFE hollow fiber micro-filtration membrane was fabricated by the non-solvent induced phase separation method. ECTFE membranes were characterized via scanning electron microscopy (SEM), pore size distribution, tensile strength, chemical resistance with pH and pure water permeation. These results indicated that membranes have asymmetric structure with continuous pores and narrow pore distribution having diameters in the microfiltration range (0.1 um) could be reliably fabricated.