Method for preparing porous membranes based on selective swelling of block copolymers

A block copolymer and selective technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as by-products, lack of universal applicability, complicated operation process, etc., to achieve high Intensity, ease of handling, results with less use
CN102764600AActive Publication Date: 2012-11-07NANJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF TECH
Publication Date
2012-11-07

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Abstract

The invention relates to a method for preparing porous membranes based on selective swelling of block copolymers. The method includes the steps of preparing a block copolymer (a block copolymer is formed by a block A and a block B) solution, preprocessing microfiltration basement membranes, coating the block copolymer solution on the processed microfiltration basement membranes, placing the microfiltration basement membranes coated with the block copolymer solution in a drying cabinet for vacuum heat treatment (a block copolymer layer solvent is volatilized to form membranes in the process), submerging the microfiltration basement membranes coated with the copolymer thin membranes in a solvent which has a selective swelling effect on one block of the block copolymer to be processed for a while, and taking out the microfiltration basement membranes coated with the copolymer thin membranes from the solvent for drying to obtain the compound porous membranes with block copolymer layers as separation layers and microfiltration basement membranes as supporting layers. The method is simple to operate, convenient and controllable. Chemical reaction is not involved, the prepared compound membranes have high mechanical strength, neat surface structure, and apparent potential of hydrogen (pH)-stimulus sensitivity, show good separation performances and have broad application prospects.
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Description

technical field

[0001] The invention relates to a composite porous membrane, in particular to a method for preparing a porous membrane using a mesoporous layer based on block copolymer selective swelling as a separation layer and a commonly used microfiltration base membrane as a support layer, that is, based on block copolymerization A method for preparing porous membranes by selective swelling of materials. Background technique

[0002] Membrane separation is a new type of high-efficiency and energy-saving separation technology. With its advantages of high-efficiency separation, simple equipment, energy saving, normal temperature operation, and no pollution, it has become an effective means to solve major problems such as energy, resources, and environment faced by contemporary humans. It is of great significance to prepare separation membranes with narrow pore size distribution and high separation precision, and to improve the separation efficiency of separation membranes...

Claims

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