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Super-hydrophobic porous polyvinyl chloride film and its preparing process

A polyvinyl chloride film, super-hydrophobic technology, applied in the direction of coating, etc., can solve the problems of expensive, fragile templates, limited industrial application prospects, etc., and achieve easy operation, stable super-hydrophobic properties, and good industrial application prospects Effect

Inactive Publication Date: 2005-06-01
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the template used in this preparation method is fragile and expensive, and the industrial application prospect is limited

Method used

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  • Super-hydrophobic porous polyvinyl chloride film and its preparing process
  • Super-hydrophobic porous polyvinyl chloride film and its preparing process
  • Super-hydrophobic porous polyvinyl chloride film and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1 part of polyvinyl chloride resin was dissolved in 18 parts of tetrahydrofuran. At room temperature, drop about 1 volume of ethanol on the pre-cleaned glass substrate in the petri dish, quickly drop about 1.5 times the volume of polyvinyl chloride solution after scraping, and gently scrape again to make the solvent-precipitant Volatilizes slowly, slowly forming a white porous film with loose structure on the surface of the substrate. After vacuum drying for 2 hours, the surface wettability test of the material was carried out on an optical contact angle measuring instrument (JY-82 type). The contact angle between the obtained polyvinyl chloride film surface and water was 163.6±2.3°, and the rolling angle was 3.9°. JEOL JSM-6700F, AMRAY 1910FE scanning electron microscopy showed that the surface of the polyvinyl chloride membrane is a porous structure of spherical particles, in which the diameter of the particles is 100nm to 1μm, and the pores are about 10nm to 1μm.

Embodiment 2

[0030] According to the operation method and steps of Example 1, the precipitating agent was changed to a mixed solvent of 0.5 volume of ethanol and water (volume ratio of 5:1). The contact angle between the surface of the obtained polyvinyl chloride membrane and water is 161.0±2.0°, the rolling angle is 5°, the surface structure of the membrane is stacked with round particles, the diameter of the particles is 100nm-1μm, and the pores are about 10nm-1μm.

Embodiment 3

[0032] According to the operation method and steps of Example 1, the precipitating agent was changed to a mixed solvent of 0.3 volume of ethanol and water (volume ratio of 2:1). The contact angle between the surface of the obtained polyvinyl chloride membrane and water is 155.3±2.8°, and the rolling angle is 6.7°. The surface structure of the membrane is stacked with oval or round particles, in which the diameter of the particles is 100nm-1μm, and the pores are about 10nm-1μm.

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Abstract

The present invention belongs to the field of porous polyvinyl chloride film material, and is especially super-hydrophobic porous polyvinyl chloride film and its preparation process. By means of solvent-precipitant phase conversion process, porous loose polyvinyl chloride film with surface micro structure of piled micron and nanometer level grains is prepared, and the film has water contact angle greater than 150 deg, water drop rolling angle smaller than 15 deg and extremely high super-hydrophobic property. The present invention provides new method of realizing super-hydrophobic characteristic of polymer film without modification of low surface energy matter and opens one new way of expanding the application fields of common plastics.

Description

technical field [0001] The invention belongs to the field of porous polyvinyl chloride membrane materials, in particular to a superhydrophobic porous polyvinyl chloride membrane and a preparation method thereof. Background technique [0002] Wettability is an important characteristic of solid surfaces, and superhydrophobicity is one of the manifestations, which means that the contact angle between solid surface and water is greater than 150 degrees, and has a small rolling angle. At present, there are two main methods for constructing superhydrophobic solid surfaces: (1) increasing the roughness of the solid surface; (2) modifying the solid surface with low surface energy substances such as fluorine-containing compounds. In recent years, people have done a lot of research work in the field of constructing superhydrophobic solid surfaces. For example, Chinese Patent Publication No. 1415800 discloses a superhydrophobic, self-cleaning nanostructure su...

Claims

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Application Information

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IPC IPC(8): B29C41/12C08J3/11
Inventor 李新红马永梅王佛松江雷赵洪志
Owner INST OF CHEM CHINESE ACAD OF SCI
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