碩士 / 淡江大學 / 化學工程與材料工程學系碩士班 / 103 / In this study, the flat-sheet composite membranes of polyvinylidene fluoride (PVDF) supported on hydrophilic cellulose were prepared, and their performances in direct contact membrane distillation (DCMD) for seawater desalination were also investigated.
The simulated seawater of 3.5 wt% NaCl solution was adepted as the feed. The dope solution consisted of PVDF, Triethyl phosphate(TEP) and Tween-20, and four conditions, 10、20、40 and 60 wt% triethylphosphate (TEP) solution were applied in the coagulation bath. From the observation by SEM, the surface pore sizeof membrane increased with the increasing of TEP concentration in the coagulation bath.
The experimental results of DCMD showed that the membrane prepared from higher TEP concentration had a larger permeate flux because of its larger pore size on the surface. And increasing the feed temperature of the feed can significantly increase the flux, but the polarization phenomena become more serious, but the effect of increasing feed flow rate the effect is not obvious on the flux.
| Identifer | oai:union.ndltd.org:TW/103TKU05063007 |
| Date | January 2015 |
| Creators | Shin-En Chiu 邱士恩, 邱士恩 |
| Contributors | Tung-Wen Cheng 鄭東文, 鄭東文 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 87 |
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