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A method for hydrophobically modifying polymer surfaces

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

Active Publication Date: 2016-02-10
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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  • A method for hydrophobically modifying polymer surfaces
  • A method for hydrophobically modifying polymer surfaces
  • A method for hydrophobically modifying polymer surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Wash and dry the polyimide film first, and then oxidize and etch the surface of the polyimide film by ultraviolet light oxidation. Use low-pressure quartz mercury lamps of 185nm and 254nm, control power to 70W, and ultraviolet light intensity 10mW / cm 2 , Where the light intensity ratio of 185nm and 254nm wavelength is 10:90, the film is oxidized and etched for 72h and taken out to obtain 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 10μL of 1H, 1H, 2H, 2H-perfluoroheptadecane trimethyloxysilane on the bottom of the polytetrafluoroethylene tank, and fix the polyimide film vertically in the polytetrafluoroethylene tank, then After being sealed with an autoclave, place it in an oven at 120°C for treatment, so that the surface after the ultraviolet ...

Embodiment 2

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

[0024] 2. Place the polyimide film after UV oxidation treatment in 50mmol / L 1H, 1H, 2H, 2H-perfluoroheptadecanetrimethyloxysilane in p-xylene solution, and place it at 100℃ Soaked in the oven for 3h, so that the surface after the ultraviolet light oxidation treatment can fully react with 1H, 1H, 2H, 2H-perfluoroheptadecan trimethyloxysilane; after the reaction is 2h, take it out, heat to 150℃, stir to make The unreacted 1H, 1H, 2H, 2H-perfluoroheptadecanetrimethyloxysilane molecules volatilize (about 2h); naturally cooled to room temperature, the water contact angle is measured to be 1...

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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 surface of lotus leaves, rice leaves, cicada wings and water strider legs all have super hydrophobic properties. This kind of super-hydrophobic surface has broad application prospects in life. For example, it can realize self-cleaning of the material surface, so that the exterior walls of buildings, outdoor billboards and other surfaces can be kept clean as lotus leaves; it can be used for automobile glass , Air-conditioning heat exchanger and anti-snow, anti-frost, anti-fog, etc. on the surface of the glasses; can be applied to metal surfaces to solve the problem of metal corrosion; can be used in the field of microfluidic control to achieve directional control of microfluid flow to reduce Low microfluidic system energy consumption; can be use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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