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A kind of hydrophobic and oleophobic self-cleaning material and its preparation method and application

A hydrophobic and oleophobic, self-cleaning technology, applied in the field of coatings, can solve the problems of short duration of hydrophobic and oleophobic properties, oily substance pollution, loss of hydrophobicity and oleophobicity, etc., achieving good thermal stability, good water resistance, oil resistance, heat resistance, excellent The effect of toughness

Active Publication Date: 2021-02-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the mechanical strength of the surface microstructure of the existing food hydrophobic and oleophobic materials is relatively low, and it is easy to be damaged by external forces and lose the original hydrophobic and oleophobic properties, so the scope of application is limited; The oil property lasts for a short time, and it is easy to be polluted by oily substances or dust on the surface and lose its effectiveness. Therefore, the development of food hydrophobic and oleophobic materials that are water-saving, energy-saving, environmentally friendly, and have excellent self-cleaning ability has broad application prospects

Method used

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  • A kind of hydrophobic and oleophobic self-cleaning material and its preparation method and application
  • A kind of hydrophobic and oleophobic self-cleaning material and its preparation method and application
  • A kind of hydrophobic and oleophobic self-cleaning material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The hydrophobic and oleophobic self-cleaning material prepared in this example can be used as an internal coating for food packaging paper or packaging film.

[0050] 1. Preparation of silicone modified resin:

[0051]1.1. Add polysiloxane monomer into the four-neck flask, stir and heat up to 80°C, add dropwise 30% hydrochloric acid solution to adjust the pH to 5, reflux for 6 hours, distill under reduced pressure, and remove the ethanol generated by the reaction , down to normal temperature, and filtered to obtain ethoxy-containing organosilicon oligomers;

[0052] 1.2. Add ethoxy-containing silicone oligomer and epoxy resin to the cyclohexanone solution in a mass ratio of 1:3. After completely dissolving, add the total mass of silicone oligomer and epoxy resin to 0.5 % of triphenylphosphine / butyl titanate composite catalyst with a mass ratio of 1:2, stirred and heated to 160°C, refluxed, the ethanol generated by the reaction was removed through an oil-water separator...

Embodiment 2

[0064] Using the silicone modified resin and cellulose airgel microsphere powder prepared in Example 1 as raw materials, the hydrophobic and oleophobic self-cleaning material prepared in this example can be used as an inner coating material for food trays or lunch boxes.

[0065] Based on 100 parts of the total weight of raw materials, the composition of raw materials includes: 30 parts of silicone modified resin, 25 parts of cellulose airgel microsphere powder, 3 parts of lotus leaf hydrophobic agent, 3 parts of fluorine-containing polyurethane oleophobic agent, propylene glycol butyl ether 0.7 parts, 12.0 parts of talcum powder, 5 parts of polyamide thermoplastic elastomer, and the balance is water.

[0066] 1. Add silicone modified resin to deionized water, stir at 500rpm, add sodium hydroxide solution to adjust pH to 7, add 1 / 3 of cellulose airgel microsphere powder, titanium dioxide and stir to obtain S1 premix ;

[0067] 2. Put lotus leaf hydrophobic agent, fluorine-con...

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Abstract

The invention discloses a hydrophobic and oleophobic self-cleaning material. According to 100 parts of the total mass of raw materials, the raw material composition comprises: 25-45 parts of organosilicon modified resin; 15-25 parts of cellulose airgel microsphere powder; hydrophobic agent 1-4 parts; 0.5-3 parts of superoleophobic agent; 1-1.5 parts of film-forming aid; 10-23 parts of filler; 5-15 parts of toughening agent; the balance is deionized water. The present invention also provides the preparation method of said hydrophobic and oleophobic self-cleaning material, by adding lotus leaf hydrophobic agent, fluorine-containing polyurethane superoleophobic agent and cellulose airgel microsphere powder, without affecting the air permeability of the material itself On the basis of this, a self-cleaning material with high mechanical strength, super-hydrophobic, super-oleophobic, and good antibacterial effect has been formed; the self-cleaning material can be applied in food processing equipment, food packaging and food transportation equipment, and improve equipment, utensils, etc. Excellent self-cleaning ability, reduce the adhesion of food residues, oil stains, etc., and improve the hygienic conditions of food processing plants and storage rooms.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a hydrophobic and oleophobic self-cleaning material, a preparation method thereof, and an application in food processing equipment, food packaging and food transportation appliances. Background technique [0002] With the improvement of people's living standards, people's requirements for food health and safety are rapidly increasing. In the process of food processing and storage, food processing equipment and utensils are easy to cause dust, oil and food residue to adhere, which is not easy to clean. Long-term use has a food safety hazards. [0003] In recent years, super-hydrophobic layer materials have received widespread attention due to their superior performance. The micron-scale structure of the surface combined with the hydrophobic wax on the surface makes the surface have a super-hydrophobic effect, such as lotus leaves in nature, which can make water droplets quickly f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/10C09D101/02C09D5/16C09D5/14C09D7/61
CPCC08K2003/2241C08L2205/035C08L2205/20C09D5/14C09D5/1606C09D5/1637C09D5/1687C09D5/18C09D183/10C08L1/02C08L75/04C08L77/00C08K3/22
Inventor 李莉罗自生王蕾杨明依
Owner ZHEJIANG UNIV
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