Polyvinylidene fluoride super-hydrophilic composite porous membrane and preparation method of silver-loaded super-hydrophilic membrane thereof

A polyvinylidene fluoride and porous membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of low production efficiency of super-hydrophilic membranes, and achieve long-lasting super-hydrophilic performance and long-lasting antibacterial sexual effect

Inactive Publication Date: 2015-09-09
ZHEJIANG TEXTILE & FASHION COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation efficiency of superhydrophilic membrane is low, and the process conditions are relatively strict

Method used

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  • Polyvinylidene fluoride super-hydrophilic composite porous membrane and preparation method of silver-loaded super-hydrophilic membrane thereof
  • Polyvinylidene fluoride super-hydrophilic composite porous membrane and preparation method of silver-loaded super-hydrophilic membrane thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0033] (1) The polyvinylidene fluoride that quality is respectively 5g, the phase-splitting polymer polyvinyl chloride of 2g, the solvent N of the pore size regulator polyethylene glycol of 1g and the solvent N of 92g, N-dimethylformamide are dissolved and mixed uniformly, The membrane-forming solution is obtained after vacuum degassing; the membrane-forming solution is passed through a scraper to form a liquid film and then enters a coagulation bath, and the polyvinylidene fluoride composite porous bottom membrane is obtained after solution phase inversion and cleaning.

[0034] (2) Immerse the polyvinylidene fluoride composite porous bottom film prepared in step (1) into a mass percent concentration of 0.3% dopa compound aqueous solution for soaking and reaction for 24 hours, take it out, wash and dry to obtain the polyvinylidene fluoride Superhydrophilic composite porous membrane.

[0035] The surface of the membrane prepared in Example 1-1 had a static water contact angle ...

Embodiment 1-2

[0037] (1) The quality is respectively the polyvinylidene fluoride of 20g, the phase-separated polymer polyethersulfone of 1g, the phase-separated polymer polystyrene / maleic anhydride copolymer of 3g, the pore size regulator diethylene glycol of 5g and the 71g The solvent N, N-dimethylacetamide is dissolved and mixed evenly, and the film-making liquid is obtained after vacuum degassing; the film-making liquid is formed into a liquid film through an extrusion die and then enters the coagulation bath, and the polypolarization is obtained after the solution phase inversion and cleaning. Vinyl fluoride composite porous bottom membrane.

[0038] (2) Immerse the polyvinylidene fluoride composite porous bottom film prepared in step (1) in an aqueous solution of dopamine compound with a concentration of 0.2% by mass, soak and react for 24 hours, take it out, wash and dry to obtain the polyvinylidene fluoride ultra-thin film Hydrophilic composite porous membrane.

[0039] The surface ...

Embodiment 1-3

[0041] (1) The polyvinylidene fluoride that the mass is respectively 10g, the phase-separated polymer polysulfone of 2g, the phase-separated polymer polystyrene of 6g, the pore size regulator polyvinylpyrrolidone of 1g, the pore size regulator polyethylene glycol of 3g Alcohol and the solvent N of 50g, N-dimethylacetamide, the solvent triethyl phosphate of 28g are dissolved and mixed evenly, and the film-making liquid is obtained after vacuum defoaming; The polyvinylidene fluoride composite porous bottom membrane was obtained after solution phase inversion and washing.

[0042] (2) Immerse the polyvinylidene fluoride composite porous bottom film prepared in step (1) in an aqueous solution of dopamine compound with a concentration of 0.15% by mass, soak and react for 24 hours, take it out, wash and dry to obtain the polyvinylidene fluoride ultra-thin film Hydrophilic composite porous membrane.

[0043] The surface of the film prepared in Example 1-3 had a static contact angle ...

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Abstract

The invention discloses a polyvinylidene fluoride super-hydrophilic composite porous membrane and a preparation method of a silver-loaded super-hydrophilic membrane thereof. A blending method and a phase to membrane conversion method are adopted, a micro-nano-level rough surface is formed while the phase conversion is performed between a phase-splitting material and a main material, then the membrane material is soaked in a solution containing dopa compounds to perform surface modification, the surface is modified through the adoption of features of oxidation, auto-agglutination, crosslinking and adhesion of the dopa compounds to prepare the super-hydrophilic membrane, the weak reducibility of polydopa or polydopamine is further used for reducing silver ions, and finally the silver-loaded super-hydrophilic membrane surface is prepared through the reaction of the dopa compounds. The super-hydrophilic surface formed by the method and the silver-loaded super-hydrophilic surface thereof have durable super-hydrophilic performance and antibacterial property.

Description

technical field [0001] The invention relates to the field of surface modification of separation membranes, in particular to a polyvinylidene fluoride superhydrophilic composite porous membrane and a method for preparing the silver-loaded superhydrophilic membrane. Background technique [0002] The surface with superhydrophilicity will endow materials with unique properties, which have important applications and have received extensive attention and research. Superhydrophilic surfaces are generally obtained by constructing micro-nano-scale rough surfaces with certain hydrophilic properties, among which nano-TiO 2 The structured superhydrophilic surface dominates. There are many methods for preparing super-hydrophilic surfaces. For example, patent CN201010120791.3 discloses a super-hydrophilic multifunctional coating surface and its preparation method. Surface composite composition of metal particles composed of copper and copper alloy prepared by substrate and electroplatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/02B01D67/00
Inventor 王建华
Owner ZHEJIANG TEXTILE & FASHION COLLEGE
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