Novel polyvinylidene fluoride film as well as preparation method and application thereof

A technology of polyvinylidene fluoride and separation membrane, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., and can solve the problems of poor stability, durability, hydrophilicity and flux decline, and reduced membrane hydrophilicity and other problems, to achieve the effect of improved hydrophilic properties, less increase in preparation costs, and excellent elongation
CN102728240AInactive Publication Date: 2012-10-17CHANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGZHOU UNIV
Publication Date
2012-10-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a titanium oxide nanowire modified polyvinylidene fluoride separation film and a preparation method of the film. The titanium oxide nanowire modified polyvinylidene fluoride separation film comprises polyvinylidene fluoride (PVDF) accounting for 18-25wt% of the total mass, organic solvent accounting for 70-80wt% of the total mass, porogen accounting for 3-5wt% of the total mass, dispersing agent accounting for 0.1-1wt% of the total mass and titanium oxide nanowire accounting for 1-5wt% of PVDF. The modified film solves the problem that the PVDF-TiO2 nanoparticles are easily agglomerated and can easily run away, and has stability and durability.
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Description

technical field

[0001] The invention relates to a polyvinylidene fluoride (PVDF) separation membrane, a preparation method thereof, and an application in water treatment. technical background

[0002] Polyvinylidene fluoride (PVDF) is widely used as a raw material for ultrafiltration membranes in industrial production due to its good oxidation resistance, thermal stability, resistance to hydrolysis, good mechanical strength and film-forming properties. However, compared with other membrane materials, the most prominent feature of PVDF is its strong hydrophobicity, which is the main factor restricting the large-scale application of PVDF membranes in many fields, especially the application of protein drugs, food and beverage and water purification, etc. In the separation of the aqueous phase separation system, it is easy to produce adsorption pollution, which reduces the two main separation indicators of membrane flux and rejection rate, reduces the service life of the membran...

Claims

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