阅读说明：本技术 一种常温快速制备透明超疏水复合涂层的方法 (Method for rapidly preparing transparent super-hydrophobic composite coating at normal temperature ) 是由 欧阳芳 闫志强 石罡 周凌杰 于 2020-06-29 设计创作，主要内容包括：本发明涉及一种常温快速制备透明超疏水复合涂层的方法,其技术方案要点是：包括如下步骤：(1)、常温下,将甲基丙烯酸和甲基丙烯酸甲酯的共聚树脂溶于有机溶剂中,在常温下进行搅拌,得到溶液A；(2)、常温下,将气相二氧化硅溶于乙醇中,搅拌溶解,得到溶液B；(3)、将步骤(1)所得溶液A涂在玻璃上,常温下静置4-6分钟,溶液A固化后涂上溶液B,常温下放置干燥,即得到透明的超疏水复合涂层。本申的制备方法,通过原料简单的混合就能在常温下快速合成超疏水材料,通过简单的滚涂工艺就能实现大面积的施工,合成条件简单,快速,条件温和,避免了长时间的加热等步骤,节约能源。(The invention relates to a method for quickly preparing a transparent super-hydrophobic composite coating at normal temperature, which has the technical scheme that: the method comprises the following steps: (1) dissolving the copolymer resin of methacrylic acid and methyl methacrylate in an organic solvent at normal temperature, and stirring at normal temperature to obtain a solution A; (2) dissolving fumed silica in ethanol at normal temperature, and stirring for dissolving to obtain a solution B; (3) and (2) coating the solution A obtained in the step (1) on glass, standing for 4-6 minutes at normal temperature, coating the solution B after the solution A is solidified, and standing and drying at normal temperature to obtain the transparent super-hydrophobic composite coating. The preparation method can quickly synthesize the super-hydrophobic material at normal temperature by simply mixing the raw materials, can realize large-area construction by a simple roll coating process, has simple and quick synthesis conditions and mild conditions, avoids long-time heating and other steps, and saves energy.)

1. A method for rapidly preparing a transparent super-hydrophobic composite coating at normal temperature is characterized by comprising the following steps:

(1) dissolving the copolymer resin of methacrylic acid and methyl methacrylate in an organic solvent at normal temperature, and stirring at normal temperature to obtain a solution A;

(2) dissolving fumed silica in ethanol at normal temperature, and stirring for dissolving to obtain a solution B;

(3) and (2) coating the solution A obtained in the step (1) on glass, standing for 4-6 minutes at normal temperature, coating the solution B after the solution A is solidified, and standing and drying at normal temperature to obtain the transparent super-hydrophobic composite coating.

2. The method for rapidly preparing the transparent super-hydrophobic composite coating at normal temperature according to claim 1, wherein the stirring time in the step (1) is 1-10 minutes.

3. The method for rapidly preparing the transparent super-hydrophobic composite coating at normal temperature according to claim 1, wherein the stirring time in the step (2) is 5-20 minutes.

4. The method for rapidly preparing the transparent super-hydrophobic composite coating at normal temperature according to claim 1, wherein the standing time in the step (3) is 1-20 minutes.

5. The method for rapidly preparing the transparent super-hydrophobic composite coating at normal temperature according to claim 1, wherein the organic solvent is a mixed solution of ethanol and ethyl acetate.

6. The method for rapidly preparing the transparent super-hydrophobic composite coating at normal temperature as claimed in claim 5, wherein the mass ratio of the copolymer resin, the ethanol and the ethyl acetate is 1 (5-15) to (10-15).

7. The method for rapidly preparing the transparent super-hydrophobic composite coating at normal temperature according to claim 1, wherein the mass ratio of the fumed silica to the ethanol is 1 (15-25).

Technical Field

The invention relates to the field of super-hydrophobic materials, in particular to a method for quickly preparing a transparent super-hydrophobic composite coating at normal temperature.

Background

The super-hydrophobic glass is a transparent special material with a contact angle of the surface of the glass with water larger than 150 degrees and a rolling angle smaller than 10 degrees, and is widely used in daily life and industry of people due to excellent properties (such as water repellency, antifouling property and the like).

Generally, building a superhydrophobic surface in glass can be achieved by two ways: firstly, a rough surface is modified by using low surface energy substances such as organic silane or fluorine resin, and secondly, a certain roughness is formed on a hydrophobic surface. Currently, there are many reports on the preparation of super-hydrophobic glass, such as that many people use hydrophobic nano-SiO 2 and neutral silicone structural adhesive as raw materials to prepare transparent super-hydrophobic SiO 2/silicone adhesive composite coatings.

However, in the existing preparation method, although the transparent super-hydrophobic composite coating can be prepared, the curing time required by the composite coating is 2-4 hours, the operation is complicated, high-temperature conditions, long-time reaction and special equipment are required, and the large-scale industrial production of the composite coating is limited.

Therefore, the method for synthesizing the super-hydrophobic glass simply, quickly and mildly has practical significance for industrial production.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a method for quickly preparing a transparent super-hydrophobic composite coating at normal temperature, which is more convenient in preparation process and can simply, conveniently and quickly synthesize the transparent super-hydrophobic composite coating.

The technical purpose of the invention is realized by the following technical scheme: a method for rapidly preparing a transparent super-hydrophobic composite coating at normal temperature comprises the following steps:

(1) dissolving the copolymer resin of methacrylic acid and methyl methacrylate in an organic solvent at normal temperature, and stirring at normal temperature to obtain a solution A;

(2) dissolving fumed silica in ethanol at normal temperature, and stirring for dissolving to obtain a solution B;

(3) and (2) coating the solution A obtained in the step (1) on glass, standing for 4-6 minutes at normal temperature, coating the solution B after the solution A is solidified, and standing and drying at normal temperature to obtain the transparent super-hydrophobic composite coating.

Further, the stirring time in the step (1) is 1-10 minutes.

Further, the stirring time in the step (2) is 5-20 minutes.

Further, the standing time in the step (3) is 1-20 minutes.

Further, the organic solvent is a mixed solution of ethanol and ethyl acetate.

Further, the mass ratio of the copolymer resin to the ethanol to the ethyl acetate is 1 (5-15) to (10-15).

Further, the mass ratio of the fumed silica to the ethanol is 1 (15-25).

In conclusion, the invention has the following beneficial effects:

1. according to the method, the copolymer resin, the fumed silica and the organic solvent are reacted for 5 minutes at normal temperature to prepare the super-hydrophobic material.

2. The copolymer resin of methacrylic acid and methyl methacrylate selected by the invention belongs to thermoplastic acrylic resin, the thermoplastic acrylic resin is a volatile substance, the drying speed is very high, the volatile drying can be realized only by a solvent, the film forming mainly depends on aggregation and fusion of macromolecules or macromolecule particles to form a film after the solvent is volatilized, and no crosslinking reaction occurs in the film forming process. And the selected mixed solution of ethyl acetate and ethanol belongs to a volatile quick-drying solvent, so that the curing process of the resin is greatly accelerated.

3. The super-hydrophobic composite coating prepared by the invention is almost transparent and has good light transmittance.

4. The invention can quickly synthesize the super-hydrophobic material at normal temperature by simply mixing the raw materials, can realize large-area construction by a simple roll coating process, has simple and quick synthesis conditions and mild conditions, avoids long-time heating and other steps, and saves energy.

Drawings

FIG. 1 is a photograph showing the contact angle of the transparent superhydrophobic material of example 1 with a water drop after the material is applied to glass by a roll coating process;

fig. 2 is a transparency picture of super-hydrophobic glass.

Detailed Description

The invention is further described below with reference to the drawings and examples, but the scope of the invention as claimed is not limited to the scope of the examples.