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Surface hydrophilic modified membrane and preparation method thereof

A hydrophilic and thin film technology, which is applied in the field of surface hydrophilic modified thin film and its preparation, can solve the problems of inability to obtain permanent hydrophilic multilayer membrane, reduction of pore size and porosity, and low flux of pure water. Achieve the effects of good wetting hydrophilicity, good bonding characteristics, and large pure water flux

Active Publication Date: 2018-09-21
SHANGHAI ENERGY NEW MATERIALS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a surface hydrophilic modified porous membrane and its preparation method, which is used to solve the problem that the porous membrane materials in the prior art are mostly hydrophobic polymers and need to be modified. And the modified porous membrane has problems such as the reduction of pore size and porosity, the inability to obtain a permanent hydrophilic multilayer membrane, and the low flux of pure water.

Method used

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  • Surface hydrophilic modified membrane and preparation method thereof
  • Surface hydrophilic modified membrane and preparation method thereof
  • Surface hydrophilic modified membrane and preparation method thereof

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preparation example Construction

[0031] Such as figure 1 As shown, the present invention provides a kind of preparation method of surface hydrophilic modified film, and described preparation method comprises steps:

[0032] 1) Provide a base film structure, and carry out unwinding corona treatment on the base film structure;

[0033] 2) providing a mixed solution comprising a hydrophilic binding substance, and coating the mixed solution on at least one surface of the basement membrane structure treated in step 1); and

[0034] 3) drying the structure obtained in step 2) to obtain a surface hydrophilic modified film, wherein the surface hydrophilic modified film includes the base film structure and the structure formed by the mixed solution. A hydrophilic surface adhesive layer on at least one surface of the base membrane structure.

[0035] The preparation process of the surface hydrophilic modified film of the present invention will be described in detail below.

[0036] First, iffigure 1 As shown in S1, ...

Embodiment 1

[0073] Carry out unwinding corona treatment with the good polyethylene porous film (porosity 40%, aperture 40nm) of winding, processing voltage 5kV, processing line speed 50m / min, will contain the isopropyl alcohol of the polyvinyl alcohol of 20% weight part afterwards The alcohol solution was uniformly coated on the surface of the corona-treated film, then dried at 50°C for 1 hour, and the obtained film was wound up at a speed of 50 m / min to finally obtain a surface-hydrophilic modified film.

[0074] Porosity

Embodiment 2

[0076] Carry out unwinding corona treatment with the good polypropylene porous membrane (porosity 45%, pore diameter 50nm) of winding, processing voltage 5kV, processing line speed 50m / min, will contain the isopropyl alcohol of the polyvinyl alcohol of 20% weight part afterwards The alcohol solution was uniformly coated on the surface of the corona-treated film, then dried at 50°C for 1 hour, and the obtained film was wound up at a speed of 50 m / min to finally obtain a surface-hydrophilic modified film.

[0077]

[0078]

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Abstract

The invention provides a surface hydrophilic modified membrane and a preparation method thereof. The preparation method includes the steps of providing a base membrane structure and performing unwinding corona treatment on the structure of the base membrane; preparing a mixed liquid containing a hydrophilic sticking substance which coats on at least one surface of the treated base membrane structure; drying the structure to obtain a surface hydrophilic modified membrane which consists of a base membrane structure and a hydrophilic surface bonding layer. According to the surface hydrophilic modified membrane and the preparation method, a solution containing the hydrophilic sticking substance is utilized to treat the base membrane to form a hydrophilic bonding layer, which has a good wettability and a fine bonding property. The coating can be limited to the surface of the base membrane structure to prevent blockage; the micro porous pore size and the porosity of the base membrane structure can be maintained, so that the porous membrane has a permanent hydrophilic surface layer on the basis of keeping the original pore diameter and the porosity, maintaining a large amount of pure water flux.

Description

technical field [0001] The invention belongs to the technical field of porous membrane preparation, and in particular relates to a surface hydrophilic modified membrane and a preparation method thereof. Background technique [0002] At present, porous membranes have been widely used in the fields of gas treatment and liquid treatment, especially in the field of water treatment. The industries involved are diverse, mainly including: petroleum, chemical industry, pharmaceuticals, food, electronics, bioengineering technology, etc. Among them, the core components of water supply and drainage purification, sewage purification, seawater desalination, etc. are carried out by using the screening principle of porous membrane. [0003] In order for the porous membrane to better perform the screening function, in addition to having a certain porosity and pore size, it also needs to have good wettability to the medium to be treated (such as water) on its outer surface and pore surface....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J7/12C08L23/06C08L23/12C08L27/16C08L27/18D06M15/63D06M101/20D06M101/32
CPCC08J7/12C08J2323/06C08J2323/12C08J2327/16C08J2427/18C08J2429/04C08J7/0427D06M15/63D06M2101/20D06M2101/32D06M2200/11
Inventor 程跃熊磊
Owner SHANGHAI ENERGY NEW MATERIALS TECH CO LTD
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