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Method for hydrophobically modifying surface of polymer

A hydrophobic modification and polymer technology, which is applied in the field of surface modification of polymer materials, can solve problems such as harsh preparation conditions, poor comprehensive performance, and complicated preparation process, and achieve no special equipment, easy large-scale implementation, and simple process Effect

Active Publication Date: 2014-04-09
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned existing technologies also have shortcomings such as poor comprehensive performance and unsuitability for large-scale commercial applications.
Among them, the surface etching method can use a polymer film with stable comprehensive properties to realize its surface hydrophobic treatment without changing its overall performance, but generally the existing photolithography technology or plasma etching technology also has complex preparation processes, Defects such as expensive equipment, harsh preparation conditions, and high cost are not conducive to large-scale promotion and application

Method used

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  • Method for hydrophobically modifying surface of polymer
  • Method for hydrophobically modifying surface of polymer
  • Method for hydrophobically modifying surface of polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Wash and dry the polyimide film first, then oxidize and etch the surface of the polyimide film by ultraviolet light oxidation method, use low-pressure quartz mercury lamps of 185nm and 254nm, control the power at 70W, and the intensity of ultraviolet light 10mW / cm 2 , wherein the light intensity ratio of 185nm and 254nm wavelengths is 10:90, and the thin film is taken out after oxidation etching for 72h, and obtained as figure 1 The micro-nano structure morphology shown includes micro-nano-scale ridge-like protrusions, channels, and island-like structures formed by nano-protrusion clusters. The surface water contact angle is less than 10°, showing a super-hydrophilic state;

[0020] 2. Take 10 μL of 1H, 1H, 2H, 2H-perfluoroheptadecanetrimethyloxysilane and place it on the bottom of the polytetrafluoroethylene tank, and fix the polyimide film vertically in the polytetrafluoroethylene tank, and then After sealing with an autoclave, place it in an oven at 120°C to make...

Embodiment 2

[0023] 1. Wash and dry the polyimide film first, then oxidize and etch the surface of the polyimide film by ultraviolet light oxidation method, use low-pressure quartz mercury lamps of 185nm and 254nm, control the power to 40W, and the intensity of ultraviolet light 7mW / cm 2 , wherein the light intensity ratio of 185nm and 254nm wavelengths is 5:95, and the thin film is oxidized and etched for 96 hours and taken out;

[0024] 2. Put the polyimide film after ultraviolet light oxidation treatment in the p-xylene solution of 50mmol / L 1H, 1H, 2H, 2H-perfluoroheptadecanetrimethyloxysilane, and place it at 100°C Soak it in an oven for 3 hours, so that the surface after ultraviolet light oxidation treatment can fully react with 1H, 1H, 2H, 2H-perfluoroheptadecanetrimethyloxysilane; take it out after 2 hours of reaction, heat to 150 ° C, stir to make The unreacted 1H,1H,2H,2H-perfluoroheptadecanetrimethyloxysilane molecules volatilized (about 2h); naturally cooled to room temperature...

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Abstract

The invention discloses a method for hydrophobically modifying the surface of a polymer. The method comprises the following steps: firstly, performing ultraviolet oxidation treatment on the cleaned surface of the polymer; secondly, performing hydrophobic substance modification on the surface of the polymer, subjected to the ultraviolet oxidation treatment, through a soaking method or a vapor deposition method. The method has the advantages that the process is simple; special equipment and vacuum or special atmosphere conditions are not needed; a template is not needed to be additionally used; large-scale implementation is facilitated. Particularly, the surface of the polymer, modified through the method, has super-hydrophobic characteristic, can still keep the super-hydrophobic characteristic after being treated at high temperature of 350 DEG C, and can meet requirements of application to severe environments such as high temperature.

Description

technical field [0001] The invention relates to a method for hydrophobically modifying the surface of a polymer, and belongs to the technical field of surface modification of polymer materials. Background technique [0002] In nature, the surfaces of lotus leaves, rice leaves, cicada wings, and water strider legs all have superhydrophobic properties. This type of super-hydrophobic surface has broad application prospects in life, such as: it can realize the self-cleaning of the surface of the material, so that the exterior walls of buildings, outdoor billboards and other surfaces can be kept naturally clean like lotus leaves; it can be used for automotive glass , air-conditioning heat exchangers, and anti-snow, anti-frost, and anti-fog on the surface of glasses; it can be applied to metal surfaces to solve the problem of metal corrosion; it can be used in the field of microfluidic control to achieve directional control of microfluidic flow to reduce The working energy consum...

Claims

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Application Information

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IPC IPC(8): C08J7/12
Inventor 宋力昕谷红宇齐振一张锦麟
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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