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Polyvinylidene fluoride super-hydrophobic self-cleaning coating and preparation method thereof

A polyvinylidene fluoride, self-cleaning coating technology, applied in the coating and other directions, can solve the problems of high preparation cost, expensive equipment, complicated process, etc., and achieve the effect of simple preparation method and easy operation

Inactive Publication Date: 2015-07-15
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new technology allows for creation of very small particles called nanoparticles that are able to stick together into thin films on surfaces like glass or plastic without sinking them down too much when they shouldn't (see also discusses how this phenomenon occurs). These tiny nanosheets have unique properties such as being highly water repelling but still allowing liquids to pass through it freely. By adjustring these parameters during film formation, various types of materials may become more effective at cleaning things up than traditional methods alone.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the durability and efficiency of create superhydrated films made from these compounds without requiring expensive processes like vacuum evaporation or sputter techniques.

Method used

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  • Polyvinylidene fluoride super-hydrophobic self-cleaning coating and preparation method thereof
  • Polyvinylidene fluoride super-hydrophobic self-cleaning coating and preparation method thereof
  • Polyvinylidene fluoride super-hydrophobic self-cleaning coating and preparation method thereof

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Effect test

Embodiment 1

[0038] (1) Preparation of the solution: add 5% polyvinylidene fluoride by mass to a mixed solvent of 75% dimethylacetamide solvent and 20% cyclohexanone diluent, at 50°C Heating and stirring for 1 h to obtain a homogeneous solution, the homogeneous solution was allowed to stand for 48 h in an electric heating blast drying oven at 50°C to fully deaerate and wait for use;

[0039] (2) Preparation of coating: Coat the defoamed polyvinylidene fluoride solution on a non-woven fabric at 50°C, seal it in a metal box, immerse the metal box in a constant temperature water bath at 10°C, and keep the 0.5h to cure the coating gel;

[0040] (3) Post-treatment: the cured coating is washed three times in methanol, and the washed coating is naturally dried to obtain a polyvinylidene fluoride superhydrophobic self-cleaning coating with a micro-nano bi-level structure on the surface;

[0041] The polyvinylidene fluoride superhydrophobic self-cleaning coating prepared in this example has a cont...

Embodiment 2

[0043] (1) Preparation of solution: add 40% polyvinylidene fluoride by mass to a mixed solvent of 40% dimethylformamide solvent and 20% ethylene glycol ester diluent. Heating and stirring at 140 °C for 4 hours to obtain a homogeneous solution, the homogeneous solution was left for 48 hours in an electric heating blast drying oven at 140 °C to fully deaerate and wait for use;

[0044] (2) Preparation of coating: Coat the defoamed polyvinylidene fluoride solution on a non-woven fabric at a temperature of 140 °C, seal it in a metal box, and immerse the metal box in a constant temperature water bath at 80 °C. Keep for 48h to cure the coating gel;

[0045] (3) Post-treatment: the cured coating is washed three times in methanol, and the washed coating is naturally dried to obtain a polyvinylidene fluoride superhydrophobic self-cleaning coating with a micro-nano bi-level structure on the surface;

[0046] The polyvinylidene fluoride superhydrophobic self-cleaning coating prepared in...

Embodiment 3

[0048] (1) Preparation of solution: 15% polyvinylidene fluoride was added to a mixed solvent of 40% dimethyl sulfoxide solvent and 45% triethyl phosphate diluent, Heating and stirring for 3 hours in the environment of 100 °C to obtain a homogeneous solution, the homogeneous solution was left for 48 hours in an electric heating blast drying oven at 100 °C to fully deaerate and wait for use;

[0049] (2) Preparation of coating: Coat the defoamed polyvinylidene fluoride solution on a non-woven fabric at 100°C, seal it in a metal box, immerse the metal box in a constant temperature water bath at 50°C, and keep the 24h, the coating gel is cured;

[0050] (3) Post-treatment: the cured coating is washed three times in distilled water, and the washed coating is naturally dried to obtain a polyvinylidene fluoride super-hydrophobic self-cleaning coating with a micro-nano bi-level structure on the surface;

[0051] The polyvinylidene fluoride superhydrophobic self-cleaning coating prepa...

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Abstract

The invention relates to a preparation method of a polyvinylidene fluoride super-hydrophobic self-cleaning coating and belongs to the technical field of coatings. The preparation method realizes preparation of the polyvinylidene fluoride super-hydrophobic self-cleaning coating according to a thermally induced phase separation theory. The preparation method combines a thermally induced phase separation method, a steam induced phase separation method and an immersion precipitation method, controls a polyvinylidene fluoride crystallisation process and realizes preparation of the polyvinylidene fluoride super-hydrophobic self-cleaning coating. The preparation method mainly comprises preparing a polyvinylidene fluoride solution, preparing a polyvinylidene fluoride coating by the above processes, washing the coating in an extractant and carrying out drying to obtain the polyvinylidene fluoride super-hydrophobic coating with a surface micro-nanostructure. The preparation method has simple processes and a low cost. The prepared coating has excellent surface hydrophobization and self-cleaning effects.

Description

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Claims

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Application Information

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Owner TIANJIN POLYTECHNIC UNIV
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