A kind of hydrophilic film and preparation method thereof

A hydrophilic membrane and hydrophobic technology, applied in the field of hydrophilic membrane and its preparation, can solve the problems of improved anti-pollution ability, unsatisfactory protein retention rate, large proportion of cellulose acetate added, etc., to achieve pure water flux and protein retention rate increase, improve filtration performance and anti-pollution ability
CN112452161BActive Publication Date: 2021-09-21SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2021-09-21

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Abstract

The invention discloses a hydrophilic membrane and a preparation method thereof. Mix the membrane, then immerse the pretreated blend membrane in dilute sulfuric acid at 50-60°C for 2-6 hours, take it out, wash it and dry it to get a hydrophilic hydrolyzed membrane, wherein the hydrophobic raw material is polyvinyl chloride or chlorinated polyvinyl chloride . In the present invention, the hydrophobic raw material and cellulose acetate are added to the porogen to cast the film, and then the film is subjected to acid hydrolysis treatment, so that the pure water flux and the protein retention rate of the film are improved, and on the basis of maintaining the mechanical properties of the blended film, It greatly improves the filtration performance and anti-fouling ability of the membrane.
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Description

technical field

[0001] The invention relates to the field of hydrophilic membranes, in particular to a hydrophilic membrane and a preparation method thereof. Background technique

[0002] Polyvinyl chloride (PVC) membrane has the advantages of low price, wear resistance, acid and alkali resistance, organic solvent resistance, corrosion resistance, etc. It has great application prospects in water treatment and water resource recycling. Since the PVC membrane is easy to wrinkle spontaneously, the film-forming property is not very ideal, poor hydrophilicity, easy pollution, and low flux limit its further development in the field of ultrafiltration and microfiltration, and the hydrophilic modification is to improve the performance of PVC membrane. The flux, hydrophilicity, anti-pollution and effective means of rejection of the membrane are also the focus of current application research. Hydrophilic modification of PVC membranes mostly focuses on surface modification and blendin...

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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