Organosilicone super-hydrophobic coating material, preparation method therefor and application of organosilicone super-hydrophobic coating material

Abstract

The invention relates to the technical field of coating materials and particularly relates to an organosilicone super-hydrophobic coating material, a preparation method therefor and an application of the organosilicone super-hydrophobic coating material. The preparation method for the organosilicone super-hydrophobic coating material comprises the steps: (1) carrying out basal membrane activation: irradiating a basal membrane or soaking the basal membrane in an acidic hydrogen peroxide solution, so as to activate the basal membrane; (2) carrying out micro-/nano-rough surface construction: soaking the activated basal membrane in sol-gel, and carrying out a condensation reaction between hydroxyl groups, so as to form a micro-/nano-rough structure on the smooth surface of the basal membrane; and (3) carrying out low-surface-energy coating modification: coating or spraying the micro-/nano-rough surface of the basal membrane with the organosilicone super-hydrophobic coating material, and carrying out baking, thereby obtaining an organosilicone super-hydrophobic coating. According to the application, a food product packaging film has super-hydrophobic performance, the water contact angle reaches 158 degree, the water roll angle reaches 10 degrees or below, the yoghurt contact angle reaches 153 degrees; and furthermore, the food product packaging film further has the advantages of safety and no toxicity.

Description

technical field [0001] The invention relates to the field of coating technology and surface treatment, in particular to an organosilicon superhydrophobic coating and its preparation method and application. Background technique [0002] The research on superhydrophobic began with a verse "Out of silt but not stained, in clean water but not demon", why the lotus leaves will come out of silt but not stained, is that the surface of the lotus leaf is a super-hydrophobic surface, the super-hydrophobic surface makes the lotus leaf The contact angle between the water on the surface and the surface of the lotus leaf exceeds 150 degrees, so that the water flow on the lotus leaf rolls down along the strands of the lotus leaf. It can be seen that the superhydrophobic surface has very good anti-staining, anti-fouling and self-cleaning functions, and these functions have broad application prospects in many fields. [0003] At present, PE / PP / CPP / PS are mostly used as the inner layer film ...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the methods for constructing superhydrophobic coatings have the following defects: First, the construction process of superhydrophobic coatings is complex and the raw materials are expensive, and most of them use fluorine-containing monomers or graft or modify nanoparticles containing fluorine substances, Therefore, it is bonded to the substrate. Although the superhydrophobic effect is obvious, the safety of fluorine-containing substances is still controversial, and the cost is high, so it is not suitable for food packaging film modification; second, the adhesion is weak, such as Through electrostatic force, hydrogen bond, etc., low surface energy substances are adhered to the surface of the substrate by deposition or layer-by-layer self-assembly, so as to achieve super-hydrophobic effect; third, the application area is narrow, mainly suitable for metal copper, aluminum, Super-hydrophobic coatings and coating processes designed for special surfaces such as glass; Fourth, the use of toxic organic solvents, even fluorinated solvents, is not only harmful to the health of construction workers, but also a huge threat to the environment

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