Amphipathic three-block polymer PS(x)MAA(y)-g-fPEG(z) modified PVDF ultrafiltration membrane and preparation method thereof

A polymer, triblock technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of difficult removal of metal salt catalysts, strong hydrophobicity of PVDF membrane, irreversible pollution, etc. Water-based and anti-pollution properties, wide application range, and easy industrial production
CN105289331AActive Publication Date: 2016-02-03SUZHOU UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SUZHOU UNIV OF SCI & TECH
Publication Date
2016-02-03

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Abstract

The invention provides an amphipathic three-block polymer PS(x)MAA(y)-g-fPEG(z) modified PVDF ultrafiltration membrane and a preparation method thereof. PS(x)MAA(y)-g-fPEG(z) is used as an additive for modifying PVDF to obtain the amphipathic three-block polymer PS(x)MAA(y)-g-fPEG(z) modified PVDF ultrafiltration membrane. The amphipathic three-block polymer PS(x)MAA(y)-g-fPEG(z) modified PVDF ultrafiltration membrane is prepared by adopting an immersion precipitation phase inversion method, the modified membrane can keep long-time stability. According to the method, the adopted additive is prepared by simple free radical polymerization and normal temperature esterification reaction, the operation is simple, the use rang is wide, and compared with the prior art, the method is few in operation steps, simple and convenient to operate, low in cost and easy to implement in commercial production; as a PS chain section in the additive-PS(x)MAA(y)-g-fPEG(z) has good compatibility with PVDF, the modified membrane is relatively stable in the using process and not liable to disappear; an MAA(y) chain section in the additive-PS(x)MAA(y)-g-fPEG(z) is enriched on the surface of the PVDF, so that the hydrophily of the modified PVDF membrane is good, the contact angle of the membrane with water is small, the water drop seepage velocity is high, and tight contact of pollutants on the surface of the membrane is prevented.
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Description

technical field

[0001] The invention relates to the technical field of polymer design and synthesis and membrane separation, in particular to an amphiphilic triblock polymer PS x MAA y -g -fPEG z Synthesis and modified polyvinylidene fluoride (PVDF) ultrafiltration membrane and its preparation method. Background technique

[0002] Membrane separation technology has the advantages of small footprint, high pollutant removal efficiency, and no secondary pollution to the environment. It has often become the preferred method to solve environmental and resource problems in the field of water treatment.

[0003] Crystalline polymer polyvinylidene fluoride (PVDF) has good chemical stability, heat resistance, mechanical stability, and can be dissolved in N-methylpyrrolidone (NMP), N,N-di Strong polar organic solvents such as methylacetamide (DMF) or dimethyl sulfoxide (DMSO) are easy to form membranes by phase inversion, and are ideal materials for preparing new polymer membranes ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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