Superhydrophobic oleophobic modification method of porous membrane

A super-hydrophobic and oleophobic, porous membrane technology, applied in the field of separation membranes, can solve the problems of weak super-amphiphobic surface, weak adhesion, weak friction and washing resistance, etc. Hydrophilization, good hydrophobicity, good stability and good abrasion resistance
CN106390764AActive Publication Date: 2017-02-15BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2017-02-15

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Abstract

The invention relates to a superhydrophobic oleophobic modification method of a porous membrane, and belongs to the technical field of separation membrane. According to the present invention, based on the self-cleaning bionic principle, fluorosilane-modified SiO2 nanoparticles having low surface energy are dispersed in an organic solution to prepare a uniform dispersion liquid, and a porous membrane is subjected to superhydrophobic oleophobic modification by using a dynamic filtration method to prepare the amphiphobic composite membrane having good stability, wherein the water contact angle of the amphiphobic composite membrane surface can achieve 167.3+ / -1 DEG C, the contact angle of diiodomethane can achieve 145.9+ / -1 DEG C, and the good amphiphobic property is presented; and method has characteristics of no requirement of complex equipment, simple and easy-performing process and short preparation period, and the prepared membrane has characteristics of high flux and good pollution resistance.
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Description

[0001] Technical field:

[0002] The invention belongs to the technical field of separation membranes, and in particular relates to a method for superhydrophobic and oleophobic modification of porous membranes. membrane distillation. Background technique

[0003] Membrane distillation is a new desalination technology that combines membrane technology and distillation technology. Compared with the traditional distillation process, it has the advantages of low operating pressure, low operating temperature and high separation efficiency. Membrane distillation is widely used in the desalination of seawater brackish water, the concentration of fruit juice and liquid food, and the treatment of wastewater. Membrane distillation technology has great advantages in some aspects of industrial application, but so far there is no report on large-scale industrial application, which is mainly limited by the constraints of membrane materials and membrane fouling. On the one hand, the membr...

Claims

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