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A kind of superhydrophobic polypropylene film and preparation method thereof

A polypropylene film and super-hydrophobic technology, applied in coatings and other directions, can solve the problems of expensive fluorine-containing compounds and limited popularization and application, and achieve the effects of good surface structure stability, efficient preparation method, and easy industrialization

Inactive Publication Date: 2018-12-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fluorine-containing compounds are expensive, which limits the popularization and application of this method to a certain extent.

Method used

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  • A kind of superhydrophobic polypropylene film and preparation method thereof
  • A kind of superhydrophobic polypropylene film and preparation method thereof
  • A kind of superhydrophobic polypropylene film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 17.6mg of iPP-b-PEG (the number average molecular weight of the iPP segment is 7800g / mol), the number average molecular weight of the PEG segment is 2300g / mol, put it in a 5mL volumetric flask, add n-octane to the mark, Heat to 110°C to dissolve the polymer completely, and then use a spin coater to spin coat the polymer solution on the surface of a clean polypropylene film (the water contact angle of the polypropylene film itself is 100°). Finally, the surface-modified polypropylene film is vacuum-dried in a vacuum oven and the volatilized solvent is recovered to obtain a superhydrophobic polypropylene film. Adopt OCAH200 contact angle tester to test the wettability of this film surface, the result shows that the contact angle of this surface and water is 153 °, and rolling angle is less than 10 °, as figure 1 . The surface morphology of the film was observed with a Sirion-100 field emission scanning electron microscope, and it was found that there was a micro-na...

Embodiment 2

[0029] Weigh 17.6 mg of iPP-b-PEG (the number average molecular weight of the iPP segment is 6500g / mol), the number average molecular weight of the PEG segment is 2300g / mol, put it in a 5mL volumetric flask, add n-octane to the mark, Heat to 110°C to dissolve the polymer completely, and then use a spin coater to spin coat the polymer solution on the surface of a clean polypropylene film (the water contact angle of the polypropylene film itself is 100°). Finally, the surface-modified polypropylene film is vacuum-dried in a vacuum oven and the volatilized solvent is recovered to obtain a superhydrophobic polypropylene film. The wettability of the surface of the film was tested by OCAH200 contact angle tester, and the results showed that the contact angle of the surface with water was 151°, and the rolling angle was less than 10°. The results of hot fog experiments show that the obtained superhydrophobic polypropylene film has good surface structure stability.

Embodiment 3

[0031] Weigh 17.6 mg of iPP-b-PEG (the number average molecular weight of the iPP segment is 5500 g / mol), the number average molecular weight of the PEG segment is 2300 g / mol, put it in a 5 mL volumetric flask, add n-octane to the mark, Heat to 110°C to dissolve the polymer completely, and then use a spin coater to spin coat the polymer solution on the surface of a clean polypropylene film (the water contact angle of the polypropylene film itself is 100°). Finally, the surface-modified polypropylene film is vacuum-dried in a vacuum oven and the volatilized solvent is recovered to obtain a super-hydrophobic polypropylene film. The wettability of the surface of the film was tested by OCAH200 contact angle tester, and the results showed that the contact angle of the surface with water was 146°, and the rolling angle was less than 10°. The results of hot fog experiments show that the obtained superhydrophobic polypropylene film has good surface structure stability.

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Abstract

The invention relates to super-hydrophobic film materials and provides a super-hydrophobic polypropylene film and a preparation method thereof. The super-hydrophobic polypropylene film is characterized in that an isotactic polypropylene-b-polyethylene glycol diblock copolymer serves as a surface modifier to construct a micronano composite structure on the surface of the polypropylene film. The preparation method includes steps: dissolving the isotactic polypropylene-b-polyethylene glycol diblock copolymer in an alkane solvent to obtain a polymer solution, coating to the surface of the polypropylene film by spin coating, putting the polypropylene film subjected to surface modification into a vacuum drying oven, and performing vacuum drying to obtain the super-hydrophobic polypropylene film. The super-hydrophobic polypropylene film and the preparation method thereof have advantages that simplicity in operation is achieved, complex chemical treatment is avoided, and expensive equipment is not needed; the preparation method is high in efficiency, feasible, environment friendly, low in cost and easy for industrialization; the prepared super-hydrophobic polypropylene film has excellent surface structural stability.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic film materials, in particular to a superhydrophobic polypropylene film and a preparation method thereof. Background technique [0002] There are a variety of organisms in nature with super-hydrophobic properties. For example, the hydrophobic phenomenon on the surface of the lotus leaf is that the water droplets on the surface also take away the pollutants on the surface of the lotus leaf, thereby achieving a self-cleaning effect. This effect It is caused by the waxy substance and micro-nano structure on the surface of the lotus leaf. At present, the research on superhydrophobic materials mainly focuses on polymer materials and metal materials. Polypropylene (PP) is cheap, environmentally friendly, widely used, and has excellent mechanical properties, heat resistance, electrical properties, chemical stability and weather resistance. Superhydrophobic materials based on polypropylene have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C09D187/00C08L23/12
CPCC08J7/0427C08J2323/12C08J2487/00C09D187/005
Inventor 傅智盛倪夕霞范志强
Owner ZHEJIANG UNIV
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