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Bio-based super-hydrophobic coating as well as preparation method and application method thereof

A super-hydrophobic coating, bio-based technology, applied in coatings, primers, etc., can solve the problems of energy consumption, high cost, complex synthesis process, etc., and achieve the effect of low cost, good compatibility, and simple synthesis process

Active Publication Date: 2020-04-07
SUZHOU WHOLENANO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the bionic research on lotus leaves, scientists have synthesized a wide variety of super-hydrophobic coatings and widely used on the surface of cement, umbrellas, fabrics, glass, etc., in order to achieve the purpose of super-hydrophobic and self-cleaning, but the existing The synthesis methods are all chemical synthesis methods, which require the use of toxic organic solvents and fluorine-containing non-environmentally friendly materials as synthetic raw materials, and chemical synthesis will cause pollution, require heating and purification, consume energy, and the synthesis process is complex and costly. high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0052] A preparation method of bio-based super-hydrophobic coating, comprising the following steps:

[0053] Step 1, preparing lotus leaf granules:

[0054] Select fresh lotus leaves, dry them at 80-85°C and relative humidity of 10-30% until the water content is 7-15%, put them into a grinder, grind them at 60-65°C, and then put them in Grinding in the grinder, sieving, and selecting lotus leaf particles with a particle size of 0.1-3um;

[0055] Step 2, prepare primer

[0056] Mix resin A and solvent to make the required primer;

[0057] Step 3. Prepare topcoat

[0058]Weigh the solvent with a predetermined ratio of 1 / 2 and add it to the reaction kettle, then add the pigment, the thickener with a predetermined ratio of 1 / 3 and the acid-base regulator with a predetermined ratio of 1 / 3, and stir at a high speed for 45- 120min; then add resin B, lotus leaf granules, a thickener with a predetermined ratio of 2 / 3 and an acid-base regulator with a predetermined ratio of 2 / 3, the...

Embodiment 1

[0063] A bio-based super-hydrophobic coating, the preparation method of which is:

[0064] Step 1, prepare lotus leaf granule

[0065] Select fresh lotus leaves, dry them at 85°C and 30% relative humidity until the moisture content is 15%, put them into a grinder, grind them at 60°C, put them into a grinder for grinding, and sieve , select lotus leaf particles with a particle size of 0.1-0.5 um.

[0066] Step 2, prepare primer

[0067] Dissolve 10 g of polyvinyl alcohol with a molecular weight of 5000 in a solvent of 100 g of water and ethanol at a ratio of 7:3 to obtain a primer.

[0068] Step 3. Prepare topcoat

[0069] Add 25g of ethanol solvent into the reaction kettle, add 0.5g of pigment, 0.33g of thickener polycarboxylate and 0.033g of acid-base regulator dimethylethanolamine in sequence, and stir at high speed for 120min at 25°C; then add 10g of resin B Acrylic resin, the lotus leaf particle that 3g step 1 obtains, 0.67g thickener polycarboxylate, 0.067g acid-base ...

Embodiment 2

[0073] A bio-based super-hydrophobic coating, the preparation method of which is:

[0074] Step 1, prepare lotus leaf granule

[0075] Select fresh lotus leaves, dry them at 85°C and 30% relative humidity until the moisture content is 15%, put them into a grinder, grind them at 60°C, put them into a grinder for grinding, and sieve , select lotus leaf particles with a particle size of 1-3um.

[0076] Step 2, prepare primer

[0077] Dissolve 50 g of polyvinyl alcohol with a molecular weight of 5000 in a solvent of 100 g of water and ethanol at a ratio of 7:3 to obtain a primer.

[0078] Step 3. Prepare topcoat

[0079] Add 50g of ethanol solvent into the reaction kettle, add 3g of pigment, 1.67g of thickener polycarboxylate and 0.67g of acid-base regulator dimethylethanolamine in turn, stir at 25°C for 120min at high speed; then add 30g of resin B acrylic acid Resin, the lotus leaf granule that 10g step 1 obtains, 3.33g thickener polycarboxylate, 1.33g acid-base regulator di...

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Abstract

The invention relates to a bio-based super-hydrophobic coating and a preparation method and an application method thereof, the bio-based super-hydrophobic coating comprises a primer and a top coating,and the top coating is prepared from resin B, lotus leaf particles, a pigment, a thickener, an acid-base regulator and the like. According to the bio-based super-hydrophobic coating as well as the preparation method and the application method thereof, the resin B is used as a matrix, the lotus leaf particles belonging to pure organisms are crushed and ground through a specific process, a nano-micron dual structure of lotus leaves is reserved, and the lotus leaf particles are added into an environment-friendly coating matched with the the lotus leaf particles. The primer is firstly coated or sprayed on a surface to be hydrophobic to ensure adhesion, reduction of surface energy and adhesion of the coating due to addition of e thlotus leaf particles is avoided, then the top coating is coatedor sprayed on the surface to be hydrophobic, the water contact angle after coating is larger than 150 degrees, the synthesis process is simple, the cost is low, and the coating is green, environmentally friendly, safe and pollution-free and can be produced in batches. The super-hydrophobic self-cleaning coating can be widely applied to the surfaces of wall surfaces, cement, metal, glass and the like to realize super-hydrophobicity and self-cleaning.

Description

technical field [0001] The invention belongs to the technical field of preparation of hydrophobic coatings, in particular to a bio-based super-hydrophobic coating, a preparation method and an application method. Background technique [0002] As we all know, lotus leaf is a self-cleaning expert in nature. There are countless micron-scale waxy papillae structures attached to the surface of the lotus leaf, and countless nano-particles with similar structures are attached to the surface of each micron-scale waxy papillae structure. Researchers call it Micro-nano dual structure of lotus leaf. It is precisely because of the existence of these tiny double structures that it is difficult for dust and water droplets to adhere to the surface of the lotus leaf, thus giving the lotus leaf the dual characteristics of super-hydrophobic and self-cleaning. [0003] Based on the bionic research on lotus leaves, scientists have synthesized a wide variety of super-hydrophobic coatings and wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/04C09D133/04C09D7/65
CPCC09D129/04C09D5/002C09D133/04C09D7/65C08L99/00
Inventor 朱红军
Owner SUZHOU WHOLENANO NEW MATERIAL TECH CO LTD
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