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Preparation method for super-hydrophobic polypropylene film

A polypropylene film and super-hydrophobic technology, which is applied in the preparation of super-hydrophobic polypropylene film and the preparation of hydrophobic film materials, can solve the problems of complex process and poor controllability, and achieve good reproducibility, low cost and process flow simple effect

Active Publication Date: 2013-01-02
昌源集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For example, "a superhydrophobic polypropylene film and its preparation method" provided by the Chinese patent, its authorized announcement number is CN101531764B, in this patent, a polypropylene film is prepared by adding acetone to a polypropylene solution, and acetone is used to induce polymerization The propylene solution produces microphase separation and forms an irregular structure, thereby obtaining a super-hydrophobic surface. The surface of the prepared polypropylene film is a porous crystal network-like bird's nest structure, and the controllability of its preparation is relatively poor, and the process is relatively complex

Method used

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  • Preparation method for super-hydrophobic polypropylene film
  • Preparation method for super-hydrophobic polypropylene film

Examples

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Effect test

Embodiment 1

[0024] First, 10 grams of polypropylene pellets were weighed and dissolved in 1000ml of xylene at 120°C to form a polypropylene solution with a concentration of 10mg / ml; 85% and 20% ethanol vapor concentration at 80°C for 10 hours. During drying, the ethanol vapor and water vapor in the air penetrate into the surface of the polypropylene solution to form honeycomb pores, thereby obtaining a superhydrophobic surface. The obtained film is It is a superhydrophobic polypropylene film, and the surface of the superhydrophobic polypropylene film is honeycomb (such as figure 2 shown). Test the wettability of this film surface with OCA20 contact angle tester, the result shows that the contact angle of this film and water is 155 ± 1.9 ° (as figure 1 shown).

Embodiment 2

[0026] First, weigh 20 grams of polypropylene pellets and dissolve them in 1000ml of toluene at 120°C to form a polypropylene solution with a concentration of 20mg / ml; %, the ethanol vapor concentration is 5% and dried at 100°C for 15 hours. During drying, the ethanol vapor and water vapor in the air penetrate into the surface of the polypropylene solution to form honeycomb holes, thereby obtaining a super-hydrophobic surface. The resulting film is Superhydrophobic polypropylene film. Test the wettability of this film surface with OCA20 contact angle tester, the result shows that the contact angle of this film and water is 156 ± 1.6 ° (as image 3 shown).

Embodiment 3

[0028] First, weigh 50 grams of polypropylene pellets and dissolve them in 1000ml of benzene at 120°C to form a polypropylene solution with a concentration of 50mg / ml; %, the ethanol vapor concentration is 15% and dried at 120°C for 15 hours. During drying, the ethanol vapor and water vapor in the air are used to infiltrate the surface of the polypropylene solution to form honeycomb holes, thereby obtaining a super-hydrophobic surface. The obtained film is Superhydrophobic polypropylene film. Test the wettability of this film surface with OCA20 contact angle tester, the result shows that the contact angle of this film and water is 156 ± 1.8 ° (as Figure 4 shown).

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Abstract

The present invention provides a preparation method for a super-hydrophobic polypropylene film, and belongs to the technical field of super-hydrophobic films. In the prior art, the existing super-hydrophobic film production requires special processing equipment or a complex process, such that cost is high, and industrialization is difficultly achieved. With the present invention, problems in the prior art are solved. The preparation method for the super-hydrophobic polypropylene film comprises the following steps: (1) weighing a certain amount of a polypropylene particle material, and dissolving in a solvent to form a polypropylene solution with a concentration of 1-100 mg / ml; (2) carrying out casting of the polypropylene solution on a substrate, and drying under an environment with a relative humidity of 75-85% and an ethanol vapor concentration of 5-20% to obtain the super-hydrophobic polypropylene film. The preparation method of the present invention has characteristics of simple process, good reproducibility, no requirement of any expensive equipment, no requirement of complex chemical treatment processes, low cost, and good industrial application prospects, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for preparing a hydrophobic film material, in particular to a method for preparing a superhydrophobic polypropylene film, and belongs to the technical field of superhydrophobic films. Background technique [0002] Polypropylene film is widely used in packaging, industry, agriculture and daily life due to its non-toxic, odorless, low cost and good transparency. However, currently commercial polypropylene films are not self-cleaning. [0003] Inspired by the lotus leaf effect, the preparation and research of superhydrophobic polymer films with water contact angles greater than 150° have aroused widespread interest in the industry in recent years. Since the contact area of ​​the liquid on the super-hydrophobic film is very small, it can effectively inhibit surface oxidation, corrosion, frost, current conduction, etc. , automotive windshields and other fields have broad application prospects. [0004] Obviously, if the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08J5/18C08L23/12
Inventor 吴军良吴俊霖吴希茜袁志庆王许南
Owner 昌源集团有限公司
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