Method for preparing fluorocarbon polymer microporous film with interpenetrating network bicontinuous pore structure

A fluorocarbon polymer and interpenetrating network technology, applied in the field of membrane separation, can solve the problems of high energy consumption and high requirements, and achieve high rejection rate and excellent mechanical properties
CN102160969AActive Publication Date: 2011-08-24NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Publication Date
2011-08-24

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Abstract

The invention discloses a method for preparing a fluorocarbon polymer microporous film with an interpenetrating network bicontinuous pore structure. The method comprises the following steps: dissolving the fluorocarbon polymer in a non-excellent solvent under conditions of constant temperature, constant humidity, constant time and constant stirring speed to prepare metastable state casting solution; defoaming the casting solution, controlling the evaporating time; curing to form by adopting a twice coagulating bath mode; and removing residual solvent, and airing to obtain the fluorocarbon polymer microporous film with the interpenetrating network bicontinuous pore structure. Compared with the prior art, in the invention, a method of combining non-solvent inductive phase separation and thermally induced phase separation is adopted to prepare a series of microporous films with the interpenetrating network bicontinuous pore structure, which have controllable structure and uniform section, and can completely eliminate large finger-type pores; and the microporous film has super large flux, high removal rating and excellent mechanical performance, can be particularly used as microfiltration films or superfiltration films, and can be applied to water resource purification and treatment.
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Description

technical field

[0001] The invention belongs to the technical field of membrane separation, and in particular relates to a preparation method of a fluorocarbon polymer microporous membrane with an interpenetrating network double continuous pore structure. Background technique

[0002] In the purification and treatment of water resources, membrane water treatment technology has been widely used in the field of gas-liquid and liquid-liquid separation due to its high efficiency, low cost, environmental protection, normal temperature operation, and no chemical changes. Among them, ultrafiltration (UF) and microfiltration (MF) are the two most important membrane separation processes, and ultrafiltration membranes and microfiltration membranes account for about 40% of the entire membrane market. The process of microfiltration and ultrafiltration membrane is based on the pore size screening mechanism. Among them, the average pore size of microfiltration is 0.1 micron to 10 microns,...

Claims

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