| Summary: | 碩士 === 中原大學 === 化學工程研究所 === 103 === In this study, the CTA membrane structure was controlled to obtain higher-performance than the commercial CTA membrane for forward osmosis (FO) process. This study investigated CTA / dioxane / H2O and CTA / dioxane-acetic acid / H2O system by the wet-phase inversion method. The morphology variation were observed in membrane formation mechanism by cloud point, light transmission, optical microscopy experiments. Furthermore, we also investigated the effects of CTA membrane structure on the FO separation performance.
The experimental results show that the closed pores CTA asymmetric membrane water flux is 17.38LMH and salt reverse flux is 17.72gMH in PRO mode test with 2.0M NaCl as draw solution and deionized water solution as the feed solution, but when we add acetic acid to improve the connectivity of membrane pores, the water flux can be raised to up to have 46.62LMH and salt reverse flux is 5.45gMH , in fact pores connectivity accounted a very important part except the thickness, tortuosity and porosity of the often mentioned factors affect the FO performance.
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