CN103360942B - A kind of super-hydrophobic nano coating and preparation method thereof - Google Patents

Abstract

The invention provides a kind of super-hydrophobic nano coating, it is characterized in that, each constituent mass per-cent is as follows: nanometer titanium dioxide 0.5% ~ 15%; Nano silicon 0.5% ~ 15%; Barium sulfate 0% ~ 20%; Talcum powder 0% ~ 20%; Thinner 40% ~ 70%; Silicone resin 20% ~ 50%.Filler grain, thinner and dispersion agent are made dispersion liquid with certain proportion, then mixes with silicone resin, add solidifying agent, stir, adopt spin coating or dip coating manner to be coated on base material, and in 50 ~ 80 DEG C of oven dry.Obtained coating is at substrate surface and water droplet contact angle between 145 ~ 160 °, and roll angle is less than 10 °.The raw materials used wide material sources of the method, technique is simple, and easy to use, cost is low, is suitable for suitability for industrialized production, can be used for the occasion such as self-cleaning surface, ice-covering-proof, water-mist-proof, fluid drag-reduction.

Description

A kind of super-hydrophobic nano coating and preparation method thereof

Technical field

The invention belongs to technical field of paint preparation, be specifically related to a kind of super-hydrophobic nano coating and preparation method thereof.

Background technology

Wetting ability is the very important feature of of solid surface, and the roughness of usual solid surface and surface energy decide its wetting ability.Super-hydrophobic is a kind of main manifestations of wetting ability, refers to that the static contact angle on water droplet and its surface is greater than 150 °, and roll angle is less than 10 ° simultaneously.

Super hydrophobic material has actual using value because of it in the fields such as waterproof, automatically cleaning, ship body drag reduction, micro-drop free of losses transmission, micro-fluidic system, has become the focus of scientific research recent years.Super hydrophobic surface is similar to " lotus leaf effect ", the mastoid process of lotus leaf surface micrometer structure exists nanostructure, is not infiltrated by liquid water completely, and the water droplet simultaneously on surface is easy to tumble under extraneous slight perturbations, takes away the dirt on surface.And requirement demand fulfillment two key conditions that the super hydrophobic material of preparation reaches such will be made: one is that material surface has enough roughness, particularly has micro-nano double scales structure, and two are materials is hydrophobic material, has enough low surface energy.Therefore can be realized by two approach, micro nano structure can be constructed at material surface, or in material surface coating low-surface energy substance.

Document discloses a kind of superhydrophobic acrylic resin paint and super-hydrophobic, the low adhesion nano composite anti-icing coating of one and preparation method, prepared coating all can realize super-hydrophobic, but the starting material of two kinds of methods have related to fluorine-containing starting material, price comparison is expensive.

Document discloses to adopt and immerses--and the method for modifying super hydrophobicity nano silicon-polyurethane composite coating is prepared in self-assembly.The coating prepared due to the method only film forming, on the alloy matrix aluminum material with uneven surface, limits its scope of application.

Document discloses a kind of method forming super-hydrophobic coat on glass basis, the nano-grade size particle utilizing the micron order size of glass microballon and teos hydrolysis to be formed carries out compound, add silane coupling agent again and modify glass microballon, thus realize super-hydrophobic.Because the method is preparing more complicated in super-hydrophobic coat process, and the combination of coating and substrate is physical bond, and cohesiveness is strong, therefore can practicality not strong.

Summary of the invention

In order to overcome the deficiency that prior art exists, the invention provides a kind of super-hydrophobic nano coating and preparation method thereof,

A kind of super-hydrophobic nano coating, it is characterized in that, each constituent mass per-cent is as follows:

Nano titanium oxide 0.5% ~ 15%;

Nano silicon 0.5% ~ 15%;

Barium sulfate 0% ~ 20%;

Talcum powder 0% ~ 20%;

Thinner 40% ~ 70%;

Silicone resin 20% ~ 50%.

A preparation method for super-hydrophobic nano coating, is characterized in that, comprises the steps:

(1) nano titanium oxide, nano silicon, barium sulfate, talcum powder and dispersion agent are added in proportion in thinner, ultrasonic or speed lapping dispersion, obtains fillers dispersed liquid; Wherein dispersion agent is 2% ~ 8% of filler grain quality.

(2) by fillers dispersed liquid and silicone resin mixing, add a certain amount of solidifying agent simultaneously, be stirred well to evenly; Wherein solidifying agent volume is 1% ~ 3% of silicone resin quality.

(3) spin coating or dip coating manner is adopted to be coated on the base materials such as glass, plastics, pottery, metal, and in 50 ~ 80 DEG C of oven dry.

Described thinner is one in dehydrated alcohol, n-propyl alcohol, Virahol, acetone, toluene, dimethylbenzene or its combination.

Described dispersion agent is alkane hydroxylammonium salts (BYK180, BYK190), the one in silane coupling agent (KH550, KH560) or its combination.

Described silicone resin is one in methyl phenyl silicone resin and methyl silicon resin classification or its combination.

Described speed lapping dispersion is that filler grain and 5 millimeters of zirconium pearls are at sand milling dispersion machine high speed grinding distribution.

Obtained coating is at substrate surface and water droplet contact angle between 145 ~ 160 °, and roll angle is less than 10 °.The raw materials used wide material sources of the method, technique is simple, and easy to use, cost is low, is suitable for suitability for industrialized production, can be used for the occasion such as self-cleaning surface, ice-covering-proof, water-mist-proof, fluid drag-reduction.

Accompanying drawing explanation

Fig. 1 is the super-hydrophobic nano coating surface of the embodiment of the present invention 1 acquisition and the contact angle test pattern of water.

Embodiment

Embodiment 1:

3 parts of titanium dioxide, 2 parts of silicon-dioxide, 0.1 part of BYK180 and 0.2 part of solvent borne polyurethane type dispersion agent are added in 100 parts of dehydrated alcohols, fully stir 2h, then ultrasonic disperse 20min, obtain the dispersion liquid of titanium dioxide and silicon-dioxide;

By above-mentioned dispersion liquid and 50 parts of organosilicon mixing, add 0.8 part of solidifying agent simultaneously, stir and ultrasonic disperse uniformly coating;

Adopt spin coating mode to be coated on sheet glass cleaned in advance, spin coating number of times is 2 times; The baking oven again sheet glass being placed in 70 DEG C is dried.

Obtained glass surface and the contact angle of water are 155 °, and roll angle is 6 °.

Embodiment 2:

6 parts of titanium dioxide, 8 parts of silicon-dioxide, 0.2 part of BYK180 and 0.56 part of solvent borne polyurethane type dispersion agent are added in 150 parts of dehydrated alcohols, add 5mm zirconium pearl, at sand milling dispersion machine high speed dispersion 2h, obtain the dispersion liquid of titanium dioxide and silicon-dioxide;

By above-mentioned dispersion liquid and 50 parts of organosilicon mixing, add 0.8 part of solidifying agent simultaneously, continue to be dispersed into uniform coating;

Adopt dip coating manner to be coated on sheet glass cleaned in advance, the baking oven being then placed in 70 DEG C is dried.

Obtained glass surface and the contact angle of water are 153.5 °, and roll angle is 7 °.

Embodiment 3:

3 parts of titanium dioxide, 2 parts of silicon-dioxide, 5 parts of barium sulfate, 0.1 part of BYK180 and 0.4 part of solvent borne polyurethane type dispersion agent are added in 100 parts of dehydrated alcohols, fully stir 2h, then ultrasonic disperse 20min, obtain the dispersion liquid of filler grain;

By above-mentioned dispersion liquid and 50 parts of organosilicon mixing, add 0.8 part of solidifying agent simultaneously, stir and ultrasonic disperse uniformly coating;

Adopt spin coating mode to be coated on sheet glass cleaned in advance, spin coating number of times is 2 times; The baking oven again sheet glass being placed in 70 DEG C is dried.

Obtained glass surface and the contact angle of water are 149 °, and roll angle is 9 °.

Embodiment 4:

2 parts of titanium dioxide, 2 parts of silicon-dioxide, 2 parts of barium sulfate, 3 parts of talcum powder, 0.07 part of BYK180 and 0.36 part of solvent borne polyurethane type dispersion agent are added in 100 parts of dehydrated alcohols, abundant stirring 2h, ultrasonic disperse 20min again, obtains the dispersion liquid of titanium dioxide and silicon-dioxide;

By above-mentioned dispersion liquid and 50 parts of organosilicon mixing, add 0.5 part of solidifying agent simultaneously, stir and ultrasonic disperse uniformly coating;

Adopt spin coating mode to be coated on sheet glass cleaned in advance, spin coating number of times is 2 times; The baking oven again sheet glass being placed in 70 DEG C is dried.

Obtained glass surface and the contact angle of water are 146 °, and roll angle is 9 °.

Claims (1)

1. a preparation method for super-hydrophobic nano coating, each component of described coating comprises by percentage to the quality: nano titanium oxide 0.5% ~ 15%; Nano silicon 0.5% ~ 15%; Barium sulfate 0% ~ 20%; Talcum powder 0% ~ 20%; Thinner 40% ~ 70%; Silicone resin 20% ~ 50%; It is characterized in that, comprise the steps:

Nano titanium oxide, nano silicon, barium sulfate, talcum powder and dispersion agent are added in proportion in thinner, ultrasonic or speed lapping dispersion, obtains fillers dispersed liquid; Wherein dispersion agent is 2% ~ 8% of filler grain quality;

By fillers dispersed liquid and silicone resin mixing, add a certain amount of solidifying agent simultaneously, be stirred well to evenly; Wherein solidifying agent volume is 1% ~ 3% of silicone resin quality;

Spin coating or dip coating manner is adopted to be coated on glass, plastics, pottery, metal base, and in 50 ~ 80 DEG C of oven dry;

Described thinner is one in dehydrated alcohol, n-propyl alcohol, Virahol, acetone, toluene, dimethylbenzene or its combination;

Described dispersion agent is alkane hydroxylammonium salts BYK180, BYK190, the one in Silane coupling agent KH550, KH560 or its combination;

Described silicone resin is methyl phenyl silicone resin;

Described speed lapping dispersion is that filler grain and 5 millimeters of zirconium pearls are at sand milling dispersion machine high speed grinding distribution.