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A method for hydrophilic modification of the surface of a porous hydrophobic material

A technology of hydrophobic material and porous material, applied in fiber processing, textile and papermaking, fiber type, etc., can solve the problem of poor blood compatibility of hydrophobicity, and achieve obvious hydrophilic effect, firm modified layer, and hydrophilic effect. boosted effect

Active Publication Date: 2017-10-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrophobicity and poor blood compatibility of polypropylene non-woven fabrics make its surface interact with plasma proteins and platelets in the blood when used for blood filtration, causing adverse reactions such as thrombosis and immune system, which limits its application.

Method used

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  • A method for hydrophilic modification of the surface of a porous hydrophobic material
  • A method for hydrophilic modification of the surface of a porous hydrophobic material
  • A method for hydrophilic modification of the surface of a porous hydrophobic material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Hydrophilic modification of polypropylene non-woven fabrics using quaternized polyethyleneimine: The polypropylene non-woven fabric was completely immersed in ethanol for 1 hour, during which time it was sonicated for 10 minutes every 20 minutes; 2 g of dopamine was dissolved in 1 L In tris-hydrochloric acid buffer solution (pH=8.5), the polypropylene non-woven fabric soaked in ethanol was immersed in the above dopamine solution for 12 hours; then it was taken out and rinsed with deionized water. Immerse the polypropylene non-woven fabric coated with dopamine in concentration once again in the phosphate buffered saline solution (pH=8.5) of quaternized polyethylenimine (molecular weight is 25000) of 5g / L, put The reaction was placed in an incubator at 37°C for 24 hours; after the reaction, the polypropylene non-woven fabric was taken out, washed 5 times with deionized water, and dried to obtain a polypropylene non-woven fabric with hydrophilic surfaces and pores. After m...

Embodiment 2

[0029] Hydrophilic modification of polypropylene non-woven fabrics using activated polyethylene glycol: replace the quaternized polyethyleneimine in Example 1 with amino polyethylene glycol, and the other experimental conditions are the same as in Example 1, and prepare A polypropylene nonwoven fabric with hydrophilic surface and pore interior was obtained. The water contact angle was measured, and the water contact angle of the unmodified polypropylene non-woven fabric was 144°, and the water contact angle after modification was 34°.

Embodiment 3

[0031] Hydrophilic modification of polypropylene non-woven fabrics using chitosan: replace the quaternized polyethyleneimine in Example 1 with chitosan, other experimental conditions are the same as in Example 1, and the surface and pores are prepared Hydrophilic polypropylene non-woven fabric inside. The water contact angle was measured, and the water contact angle of the unmodified polypropylene non-woven fabric was 144°, and the water contact angle after modification was 44°.

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Abstract

The invention discloses a method for modifying the hydrophilicity of the surface of a porous hydrophobic material. In this method, the porous hydrophobic material is firstly pretreated, and then the material is modified by polyphenolic compounds and grafted with hydrophilic molecules, so as to realize the hydrophilicity of the surface and the inside of the porous hydrophobic material. The effect of water modification. The invention modifies the hydrophobic material through a simple and effective method, so that the surface of the material and the interior of the pores have excellent hydrophilic properties, which overcomes the existing modification method that can only modify the surface of the material, but cannot modify the interior of the pores of the porous material. The disadvantages of modification; and according to the grafting of hydrophilic molecules with different functions, the material can also have other functions while being hydrophilic, such as antibacterial, anti-protein adhesion, anti-corrosion, etc. The method of the invention is simple and easy, the modified layer is firm after modification, and the hydrophilic effect of the material is obviously improved, which is suitable for popularization.

Description

technical field [0001] The invention belongs to the field of material surface modification, and in particular relates to a method for hydrophilic modification of the surface of a porous hydrophobic material. Background technique [0002] Polyphenolic compounds are widely used in surface modification of materials. For hydrophobic materials, although polyphenolic compounds can coat and modify the surface of hydrophobic materials, due to the hydrophobicity of the materials, the solution cannot enter the voids of the materials, so that only the surface of the materials can be modified. The material cannot be modified internally. [0003] Polypropylene non-woven fabric is made of polypropylene, which has high strength, small difference in vertical and horizontal strength, acid and alkali resistance, non-toxic, non-radiation, harmless to human physiology, excellent air permeability, masterbatch dyeing, permanent No fading and other advantages. Widely used in packaging shopping ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/61D06M15/53D06M15/03D06M15/15D06M11/70D06M13/368D06M13/152D06M13/513D06M13/238D06M101/20
Inventor 徐福建胡浩罗旭
Owner BEIJING UNIV OF CHEM TECH
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