Method for improving surface wetting property of thin polymer film through surface grafting

A polymer film and wetting performance technology, which is applied in the field of improving film wettability and improving the surface wetting performance of polymer films by grafting hydrophilic polymers on the surface, which can solve the problem of poor surface modification effect and poor wetting performance. , poor durability and stability, etc., to achieve the effect of good wetting performance, strong stability, and strong bonding

Inactive Publication Date: 2015-10-28
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of poor polymer film surface wettability, poor surface modification effect or poor durability stability in the prior art, and provide a process for improving the wettability of the polymer film surface

Method used

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  • Method for improving surface wetting property of thin polymer film through surface grafting
  • Method for improving surface wetting property of thin polymer film through surface grafting
  • Method for improving surface wetting property of thin polymer film through surface grafting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Spin-coat a layer of hydrophilic polyacrylic acid polymer on the surface of a polychlorinated p-xylylene film with a thickness of 100 μm at a concentration of 5 mg / mL, and dry it for later use. Fix the coated film on the sample stage of the superthermal hydrogen system, turn on the vacuum pump, and make the vacuum degree in the cavity reach 2×10 -2 When Pa, 14SCCM hydrogen gas (standard milliliters / min, the same below) is fed in sequence, and the microwave plasma is turned on, and the acceleration power supply and the repulsion power supply are turned on, wherein the microwave power is 300W, the acceleration voltage is 100V, and the kinetic energy of neutral hydrogen molecules is 10eV. Hydrogen gas bombarded the film sample for 15s, so that polyacrylic acid was cross-linked and fixed on the surface of the polymer film in the form of chemical bonds, and a film with enhanced surface wettability was obtained. The wettability of the film was tested by the surface water conta...

Embodiment 2

[0048] The polychlorinated p-xylylene film (thickness 100 μm) was ultrasonically cleaned for 15 min in containers containing acetone and ethanol, and dried with nitrogen. Spin-coat a layer of hydrophilic polyethylene glycol polymer on the surface of the clean polymer film, the concentration of the hydrophilic polymer is 8mg / mL, and dry it for later use. Mount the coated film on the sample stage of the epithermal system. Turn on the vacuum pump to make the vacuum in the cavity reach 5×10 -2 At Pa, 14SCCM hydrogen gas is fed in sequence, and the microwave plasma is turned on, and the acceleration power supply and the repulsion power supply are turned on. The microwave power is 300W, the acceleration voltage is 100V, the kinetic energy of neutral hydrogen molecules is 15eV, and the film sample is bombarded with hydrogen for 30s. Polyethylene glycol is cross-linked and fixed on the surface of the polymer film in the form of chemical bonds to obtain a film with enhanced surface we...

Embodiment 3

[0050] The polychlorinated p-xylylene film (thickness 100 μm) was ultrasonically cleaned for 15 min in containers containing acetone and ethanol, and dried with nitrogen. Spin-coat a layer of hydrophilic polyacrylic acid polymer on the surface of the clean polymer film, the concentration of the hydrophilic polymer is 10mg / mL, and dry it for later use. Mount the coated film on the sample stage of the epithermal system. Turn on the vacuum pump to make the vacuum in the cavity reach 6×10 -2 At Pa, 14SCCM hydrogen gas is fed in sequence, and the microwave plasma is turned on, and the acceleration power supply and the repulsion power supply are turned on. The microwave power is 300W, the acceleration voltage is 100V, the kinetic energy of neutral hydrogen molecules is 16eV, and the film sample is bombarded with hydrogen for 60s. Polyacrylic acid is cross-linked and fixed on the surface of the polymer film in the form of chemical bonds to obtain a film with enhanced surface wettabi...

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Abstract

The invention discloses a method for improving surface wetting property of a thin polymer film through surface grafting. The method comprises the following steps: (2) taking the thin polymer film, coating the surface with a layer of hydrophilic polymer material, and drying; (3) in the vacuum environment, bombarding the thin polymer film by using hydrogen molecules with kinetic energy, so as to obtain the thin polymer film with surface wetting property, wherein the polymer substrate is a hydrophilic high-molecular polymer. The method provided by the invention has the following advantages: the reaction condition is mild; during the processes of polymer crosslinking and surface coating, polymer molecules are not degraded and damaged; the wetting property of the thin film can be effectively improved; the formed surface hydrophilic coating can stably exist, so that the problem of reduction of the wetting property is overcome; meanwhile, the original physical properties of the polymer film are reserved.

Description

technical field [0001] The invention relates to a method for improving the wettability of the surface of a polymer film, in particular to a method for improving the wettability of the film by grafting a hydrophilic polymer on the surface, and belongs to the technical field of material surface modification. Background technique [0002] There are many types of organic polymer film materials, which can be widely used in packaging, electronic packaging, surface printing and other fields. In the actual use of the film, most organic polymer materials have low surface energy, which makes it difficult for polar liquids to wet on the surface, and has poor adhesion to other additional coatings. Therefore, improving the wettability of the surface of hydrophobic polymer membranes has become an urgent problem to be solved. [0003] In recent years, in order to improve the surface wettability and surface energy of hydrophobic polymer membranes, chemical wet etching, plasma surface treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J7/04
Inventor 唐昶宇邵虹何周坤帅茂兵胡歆梅军刘焕明徐克勤
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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