Hollow Fiber Membranes and Preparation Method and Use Thereof
AssigneesChina Petroleum & Chemical Corporation, Sinopec Beijing Research Institute of Chemical Industry
InventorsChangjiang WU, Xin WEI, Yiqun LIU, Liming DING, Hesheng LI, Yixiao XU, Renjie XI, Yujie WANG, Anqi TANG, Qi ZOU
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Abstract
The invention relates to the technical field of membrane separation, and discloses a hollow fiber membrane and preparation method and use thereof. The hollow fiber membrane includes a support, a selective layer, and a transition layer between the support and the selective layer, wherein at least a portion of the transition layer is embedded in the support. The hollow fiber membrane has a high selectivity and good mechanical properties.
Claims20
A hollow fiber membrane, characterized in that the hollow fiber membrane comprises a support, a selective layer, and a transition layer between the support and the selective layer, wherein at least a portion of the transition layer is embedded in the support.
A method for producing a hollow fiber membrane, characterized in that the method comprising:
- (1) preparing a casting solution comprising a polymer;
- (2) coating the casting solution onto a support, wherein a portion of the casting solution permeates into the support, so as to obtain a primary film coated on the support;
- (3) heating the primary film to form a selective layer;
- (4) injecting a bore fluid into the support to induce non-solvent induced phase separation of the casting solution permeated into the support to generate a transition layer;
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- (5) optionally, heating to remove substantially all of the solvent after the generation of the transition layer.
Dependencies are inferred from the claim text.