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Method for performing surface modification on polymer by using phenol derivative

A phenol derivative and surface modification technology, which is applied in the field of organic polymer surface modification, can solve the problems of inability to achieve group selectivity, wet chemical oxidation pollution, and huge investment, and achieve rapid and effective modification effects, No effect on surface morphology and no pollution to the environment

Active Publication Date: 2010-09-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, usually several groups are mixed and introduced, and the selectivity of the group cannot be achieved
Or there is no chemical bond between the group of the surface layer and the modified polymer (such as the surface coating method), which is prone to failure during use
In addition, there are pollution problems in the wet chemical oxidation method, and the investment in equipment for ray irradiation and plasma treatment is huge

Method used

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  • Method for performing surface modification on polymer by using phenol derivative
  • Method for performing surface modification on polymer by using phenol derivative
  • Method for performing surface modification on polymer by using phenol derivative

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation concentration is the solution of 4-hydroxyaniline in the mixed solvent of acetone and water (acetone / water=3 / 7, volume ratio) of 10wt% as reaction solution, injects this reaction solution in two pieces to be prepared with micro injector The modified BOPP (biaxially oriented polypropylene) film forms a "sandwich" structure of the reactor. The intensity of the high-pressure mercury lamp is 9500μw / cm 2 irradiated under ultraviolet light for 18 min, and then stopped the reaction. At room temperature, the modified membrane was repeatedly washed with water and acetone, and dried to obtain a clean modified membrane. The surface contact angle of the modified film is shown in Table 1, and the ultraviolet absorption spectrum is shown in the attached figure 1 .

Embodiment 2

[0037] Preparation concentration is the solution of the 4-hydroxyphenethylamine of 2wt% in acetone and water (acetone / water=4 / 6, volume ratio) mixed solvent as reaction solution, this reaction solution is injected in two A reactor with a "sandwich" structure is formed between the CPP (cast polypropylene) film to be modified, and the light intensity of the medium-pressure mercury lamp is 2500μw / cm 2 Take it out after 15 minutes of ultraviolet light irradiation, and then stop the reaction. At room temperature, the modified membrane was washed with water and acetone repeatedly in turn, and a clean modified membrane was obtained after drying. The surface properties of the modified film are shown in Table 1 and the UV absorption spectrum is shown in the attached figure 2 .

Embodiment 3

[0039] Preparation concentration is the solution of the 4-mercaptophenol of 0.1wt% in the mixed solvent of acetone and water (acetone / water=1 / 9, volume ratio) as reaction solution, injects this reaction solution in two slices with micro-injector Between the LDPE (low density polyethylene) films to be modified, a reactor with a "sandwich" structure is formed, and the intensity of the high-pressure mercury lamp is 8500μw / cm 2 Take it out after 25min of ultraviolet light irradiation, and then stop the reaction. At room temperature, the modified membrane was washed with water and acetone repeatedly in turn, and a clean modified membrane was obtained after drying. The surface properties of the modified film are shown in Table 1 and the UV absorption spectrum is shown in the attached image 3 .

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Abstract

The invention provides a method for performing surface modification on a polymer by using a phenol derivative. The method specifically comprises the following steps of: firstly, generating a macromolecular chain free radical on the surface of an organic polymer by using the hydrogen abstraction reaction of a Norrish II photo initiator; secondly, by using the phenol derivative, generating a C-O covalent bond through a photo-assisted free radical coupling reaction and forming a monomolecular film of the phenol derivative on the surface of the organic polymer; thirdly, introducing different functional groups on the surface of the polymer by using different molecular substituent groups of the phenol derivative; and finally, by combining a photo mask, selectively introducing the groups to a specified area on the surface to form designed patterns. Through the method of the invention, the surface modification can be performed on all organic polymers of which molecular chains contain C-H bonds. The method is mainly characterized by introducing specified functional groups to the specified area of the surface of a product to form the designed patterns and has the advantages of simple implementation, short reaction time, no influence to the inherent performance of the product and low equipment cost.

Description

technical field [0001] The invention relates to a method for modifying the surface of an organic polymer. Specifically, other specific functional groups on the benzene ring are introduced onto the surface of the polymer through the coupling reaction of the phenolic hydroxyl group with the free radicals on the polymer surface. These functional groups include, but are not limited to, hydroxyl, carboxyl, amino, sulfonic acid, mercapto, aldehyde, vinyl, ethynyl, and the like. The polymer surface referred to in the present invention may be the surface of films, sheets, particles and other shaped articles. This modification reaction is achieved by hydrogen abstraction photoinitiators, such as ketone compounds, which are excited by ultraviolet light to abstract the H atoms of the C-H bond, and generate C-center free radicals on the surface of organic polymers. Background technique [0002] Polymer films, especially polyolefin films (polyethylene and polypropylene) and polyester (...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J3/28
Inventor 杨万泰徐菁马育红谢景毅
Owner BEIJING UNIV OF CHEM TECH
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