Polyvinylidene fluoride hydrophilic modified membrane and preparation method thereof

A polyvinylidene fluoride, hydrophilic modification technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of water flux decline, difficult chemical modification of membrane surface, and high cost of disposable equipment. problem, to achieve the effect of easy operation
CN103127841AInactive Publication Date: 2013-06-05SINOCHEM LANTIAN +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SINOCHEM LANTIAN
Publication Date
2013-06-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a polyvinylidene fluoride hydrophilic modified membrane and a preparation method of the polyvinylidene fluoride hydrophilic modified membrane. The polyvinylidene fluoride hydrophilic modified membrane is composed of 12-22% polyvinylidene fluoride hydrophilic, 0.5-15% hydrophilic polymer and 63-87.5% polarity good solvent. By means of the prepared polyvinylidene fluoride hydrophilic modified membrane, a pore-forming agent does not need to be added. Compared with the prior art, the polyvinylidene fluoride hydrophilic modified membrane and the preparation method of the polyvinylidene fluoride hydrophilic modified membrane have the advantages of being simple in operation method, big in water flux, relatively small in water contact angle, good in hydrophilicity, good in uniformity and the like. The prepared polyvinylidene fluoride hydrophilic modified membrane is suitable for being made into a composite type flat sheet membrane and used for a membrane bioreactor.
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Description

technical field

[0001] The invention belongs to the technical field of membrane science and membrane materials, and specifically relates to a polyvinylidene fluoride hydrophilic modified membrane and a preparation method thereof. Background technique

[0002] Polyvinylidene fluoride (PVDF) has good chemical stability, heat resistance and mechanical properties, as well as anti-ultraviolet radiation and aging resistance, and is soluble in some strong polar solvents. It is easy to form a film by phase inversion method. It is a new type of membrane material with excellent comprehensive performance, which has aroused great interest in membrane separation technology in recent years (see Zhang Kan et al., Fine Chemical Industry, 2001, 18: 100; Tang Guangjun et al., Chemical Industry Progress, 2004, 23: 480). However, due to its strong hydrophobicity, PVDF will cause two problems in the separation of water phases: one is the high driving force of mass transfer through the membrane ...

Claims

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