Abstract
The structure of the reverse osmosis hollow fiber membrane of CTA made by gel-spinning method is described here. As everyone know, the structure of a chemical fiber not only depends on the polymer material, but also on the fabrication technology. It is also the same for reverse osmosis membrane. The membrane in this study has been made by the gel-spinning technology, therefore, the morphological structure of the membrane possesses the characteristics of gel-spinning fibers. First, there is a remarkable difference in the structure across the traverse section of the hollow fiber membrane, that is so called “core-skin” structure; secondly, there is a network structure in the hollow fiber. The experimental results showed that the flux of the membrane is closely related to the meltdraw ratio of the fiber. Based on the performance of the reverse osmosis membrane, this paper discusses the effect of the network structure on the membrane performance.
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