阅读说明：本技术 一种自清洁防雾天文望远镜镜片的制备方法 (Preparation method of self-cleaning antifogging astronomical telescope lens ) 是由 郑羽桐 徐涛 黄晓玲 冀亚雄 赵未 戴三瑜 于 2019-09-09 设计创作，主要内容包括：本发明涉及一种自清洁防雾天文望远镜镜片的制备方法,自洁防雾涂料的制备方法首次使用纳米二氧化硅掺杂纳米二氧化钛,并以纳米二氧化硅、纳米二氧化钛和纳米银为主要成分使涂料自洁、防雾,不但具有良好的自清洁功效而且还有持久的防雾效果,其涂膜更具有优异的抗菌功能。制备的自洁防雾涂膜可在玻璃表面上形成一薄而透明的保护膜,其膜附着力强,能够迅速快捷清洗、快速挥发、不留痕迹的处理镜面。同时,制备的镜片也具有优异的自清洁、防雾、杀菌及高透等特点。(The invention relates to a preparation method of a self-cleaning antifogging astronomical telescope lens, which is characterized in that nano-silica is doped with nano-titanium dioxide for the first time, and the nano-silica, the nano-titanium dioxide and nano-silver are used as main components to enable the coating to be self-cleaning and antifogging, so that the self-cleaning antifogging coating has good self-cleaning effect and lasting antifogging effect, and a coating film of the self-cleaning antifogging coating has an excellent antibacterial function. The prepared self-cleaning antifogging coating can form a thin and transparent protective film on the surface of glass, and the film has strong adhesive force, can quickly clean and volatilize quickly, and can treat a mirror surface without leaving traces. Meanwhile, the prepared lens also has the characteristics of excellent self-cleaning, antifogging, sterilizing, high transmittance and the like.)

1. A preparation method of a self-cleaning antifogging astronomical telescope lens is characterized by comprising the following steps:

(1) step 1, stirring and mixing 6-13 parts of sodium citrate, 6-9 parts of dilute hydrochloric acid, 9-25 parts of nano silicon dioxide and 14 ~ 16 parts of isopropanol until a fine and uniform mixture A is formed;

(2) step 2, stirring and mixing 10-36 parts of nano-scale titanium dioxide, 5-12 parts of heptadecafluorodecyltriethoxysilane (FAS-17) and 14 ~ 16 parts of isopropanol until a fine and uniform mixture B is formed;

(3) and step 3: mixing the mixture A and the mixture B in the steps 1 and 2, and adding 5-14 parts of nano silver to be uniformly mixed;

(4) step 4, uniformly mixing 3% of hydrogen peroxide and 2mol/L of dilute hydrochloric acid according to a volume ratio of 1:1 to prepare a lens soaking mixed solution, placing the astronomical telescope lens into the mixed solution of 3% of hydrogen peroxide and 2mol/L of dilute hydrochloric acid, soaking for 0.8 ~ 1.5.5 hours, washing with deionized water and absolute ethyl alcohol, and drying for later use;

(5) and 5: spraying the coating prepared in the step 3 on the mirror surface treated in the step 4, and naturally airing;

(6) and 6, heating the naturally dried lens in an oven at 75 ~ 85 ℃ for 26 ~ 36 minutes to obtain the self-cleaning anti-fog lens.

2. The method for preparing the self-cleaning anti-fog astronomical telescope lens as claimed in claim 5, wherein in step 3, the lens sprayed with the mixture of A and B is naturally dried and then placed for 18 ~ 30 minutes, and then the operation of step 6 can be performed.

3. The method for preparing the self-cleaning anti-fog astronomical telescope lens according to claim 1, wherein the method comprises the following steps: in step 1, step 2 and step 3, the stirring time was 30 minutes.

4. The preparation method of the self-cleaning antifogging coating for the mirror surface of the astronomical telescope according to claim 1, which is characterized in that: the particle size of the nano titanium dioxide is 2-8 nm.

5. The preparation method of the self-cleaning antifogging coating for the mirror surface of the astronomical telescope according to claim 1, wherein the self-cleaning antifogging coating comprises the following steps: the particle size of the nano silicon dioxide is 2-8 nm.

Technical Field

The invention relates to the technical field of functional coatings, in particular to a preparation method of a self-cleaning anti-fog astronomical telescope lens.

Background

The problem of environmental pollution seriously affects the daily life of people, so that in the process of using the astronomical telescope outdoors, many astronomical amateurs have reduced transparency of the mirror surface because particles such as environmental pollutants, atmospheric dust and the like stop on the mirror surface, and aerial fog is easily formed on the surface of the mirror surface because of weather reasons, which seriously affects the beauty of the mirror surface of the astronomical telescope, increases the time and cost for maintaining and cleaning the mirror surface, and causes the waste of water resources in the cleaning process. According to statistics, all the current astronomical telescopes are basically puzzled by the problem of cleaning, and the observation of astronomical researchers is directly influenced. In the prior art, a transparent super-hydrophobic coating is coated on the surface of a glass mirror surface, so that a super-hydrophobic interface is rapidly formed between the coating surface of the glass mirror surface and dirt, the contact angle between the dirt and the surface of the glass mirror surface is larger than 150 degrees, the dirt slides along the surface of the glass mirror surface under the action of the gravity of the dirt, and meanwhile, the dirt on the surface of the glass mirror surface is taken away, so that the purpose of self-cleaning is achieved. However, the existing coating cannot solve the problem of aerial fog caused by weather reasons, and the aerial fog can be eliminated by using the demisting agent for many times, so that the operation is not only complicated, but also the time and the resources are wasted, and the cost is high.

Therefore, the development of the self-cleaning and anti-fog coating for the glass mirror surface and the lens, which have the advantages of good adhesion performance, self-cleaning, long anti-fog durability, good effect, simple experimental operation and low cost, is a technical problem to be solved in the field.

Disclosure of Invention

The invention aims to avoid the defects in the prior art and provide a self-cleaning anti-fog and degerming multifunctional coating film which has the advantages of good adhesion, lasting effect and the like.

The purpose of the invention is realized by the following technical scheme:

a preparation method of a self-cleaning antifogging astronomical telescope lens comprises the following steps:

(1) step 1, stirring and mixing 6-13 parts of sodium citrate, 6-9 parts of dilute hydrochloric acid, 9-25 parts of nano silicon dioxide and 14 ~ 16 parts of isopropanol until a fine and uniform mixture A is formed;

(2) step 2, stirring and mixing 10-36 parts of nano-scale titanium dioxide, 5-12 parts of heptadecafluorodecyltriethoxysilane (FAS-17) and 14 ~ 16 parts of isopropanol until a fine and uniform mixture B is formed;

(3) and step 3: and (3) mixing the mixture A and the mixture B obtained in the steps 1 and 2, and adding 5-14 parts of nano silver until the mixture is uniformly mixed.

(4) Step 4, uniformly mixing 3% of hydrogen peroxide and 2mol/L of dilute hydrochloric acid according to a volume ratio of 1:1 to prepare a lens soaking mixed solution, placing the astronomical telescope lens into the mixed solution of 3% of hydrogen peroxide and 2mol/L of dilute hydrochloric acid, soaking for 0.8 ~ 1.5.5 hours, washing with deionized water and absolute ethyl alcohol, and drying for later use;

(5) and 5: spraying the coating prepared in the step 3 on the mirror surface treated in the step 4, and naturally airing;

(6) and 6, heating the naturally dried lens in an oven at 75 ~ 85 ℃ for 26 ~ 36 minutes to obtain the self-cleaning anti-fog lens, wherein the temperature is favorable for the coating to be completely crosslinked into a film, and the excessively high or excessively low temperature is not favorable for the film to be formed.

Preferably, in step 3, the lens sprayed with the mixture of a and B is naturally dried and then placed at 18 ~ 30 for 30 minutes, and then the operation of step 6 can be performed.

Preferably, in step 1, step 2 and step 3, the stirring time is 30 minutes.

Preferably, the particle size of the nano titanium dioxide is 2 ~ 8 nm.

Preferably, the particle size of the nano-silica is 2 ~ 8 nm.

The invention has the beneficial effects that:

the preparation method of the self-cleaning antifogging astronomical telescope lens uses the technical scheme that the nano silicon dioxide can reduce the contact angle of the surface of the coating film, so that water in the air is in contact with the nano silicon dioxideThe diffusion forms a water film, no scattering is generated, the fogging phenomenon is prevented, and the anti-fogging aging is increased; the nano silver has stronger disinfection and sterilization effects, and endows the glass mirror surface with good antibacterial effect; nano TiO 2₂As a self-cleaning coating, the photocatalytic action of titanium dioxide can degrade organic pollutants on the surface of a glass mirror surface, so that the self-cleaning effect is achieved. The sodium citrate can be used as an auxiliary agent of a nontoxic detergent in the invention, and the dilute hydrochloric acid can be helpful for catalyzing the functional component nano TiO₂And silicon dioxide is fast and firmly attached to the mirror surface, and meanwhile, the low refractive index of the fluorosilane enables the substrate to play a role in preventing light reflection and assisting in reducing the contact angle of the surface of the coating film. The method has the advantages of simple operation, low cost, few raw material types, uniform and transparent coating, complete transparency in a visible light range and firm combination with the glass mirror surface.

The preparation method solves the problems of complex process, low glass light transmittance, low adhesion property, short duration, no antifogging and the like in the traditional preparation process of the self-cleaning glass, 3 percent of hydrogen peroxide has the capability of disinfection and sterilization, and 2mol/L of dilute hydrochloric acid can remove impurities on the surface of the glass and promote the film-forming adhesion of a coating film. The self-cleaning antifogging lens prepared by the invention has the advantages of environmental protection, antibiosis, self-cleaning, good antifogging durability, good adhesion property and the like:

(1) the self-cleaning antifogging coating film is not influenced by the environment, can change water mist accumulated on the mirror surface into water drops and take away pollutants at any time, and has the effect of cleaning the mirror surface.

(2) The coating film disclosed by the invention can prevent fog and self-clean at a proper critical hydrophobic angle, and has a good anti-fog self-cleaning effect.

(3) The coating and the carrier form a coating which is firmly adhered, uniform and compact, and the coating has excellent hydrophobic property, is transparent and has excellent antibacterial property.

Detailed Description

The invention is further illustrated by the following examples.