A kind of individual layer SiO
2the preparation method of anti-reflection film
Technical field
The present invention relates to a kind of individual layer SiO
2the preparation method of anti-reflection film, belongs to anti-reflection film preparing technical field.
Background technology
The anti-reflection film of silicon solar cell device is mainly used in packaged glass surface, for improving sunlight transmissivity and the protection packaging glass of packaged glass.Float glass process ultra-clear glasses is for more than encapsulating annual 3500000 square meters of annual production of solar cell, and increase year by year.Compare with organic membrane, mineral membrane has excellent heat, chemically stable shape, resistance to microorganism property and the higher advantages such as physical strength, in catalysis, gas delivery, be that the fields such as processing, membrane reactor have huge application potential.
Along with the continually developing and studying of anti-reflection film, the coating technique of optical anti-reflective film is also in continuous development.The thickness of optical anti-reflective film will be controlled on the order of magnitude of visible wavelength 1/4, and the requirement of the uniformity coefficient of anti-reflection film is unusual harshness also.However, in people's persistent exploration, many effective, advanced coating techniques have still been grasped.At present, conventional film coating method has vacuum evaporation, chemistry to play mutually the methods such as deposition, sol-gel coating.Three compares, sol-gel coating equipment is simple, can operate at normal temperatures and pressures, membrane uniformity is high, microtexture is controlled, be suitable for different shapes, size substrate, can fill a prescription by control, preparation technology obtains optical thin film, become various optical thin films and the most competitive preparation method of top coat.
At present, anti-reflection film adopts wet chemical method collosol and gel SiO
2coating, antireflective effect is more general, average 2% left and right, chemical stability and self-cleaning ability, easily adsorb dust and cause transmitance to decline below 20%.Well imagine to possess good antireflective effect, the anti-reflection film of simultaneously taking into account good self-cleaning ability and chemical stability is that the excellent of sun power packaged glass must be joined " clothes ".In addition, solar energy collector anti-reflection film technology dull and stereotyped and vacuum tube glass is also completely not universal at home, and the heating efficiency that promotes solar energy collector is the technological trend of domestic heat collector development.
Summary of the invention
The object of the invention is to for deficiency of the prior art, the individual layer SiO that a kind of antireflective effect is outstanding, possess self-cleaning function is provided
2the preparation method of anti-reflection film.
The present invention is achieved through the following technical solutions: a kind of individual layer SiO
2the preparation method of anti-reflection film, is characterized in that: comprise the following steps:
(1) base plate glass pre-treatment: base plate glass is distinguished ultrasonic 30 minutes in acetone soln and ethanolic soln;
(2) SiO
2the preparation of colloidal sol: this colloidal sol adopts two step synthesis: A) adopt traditional sol-gel method to prepare dilute acidic SiO
2colloidal sol is as mother solution, and preparation method is as follows: by the organic precursor of silicon, alcohols and water, as presoma, mix according to the ratio of mol ratio 1:30:4, add salt acid for adjusting pH to 2~5, stir, and room temperature ageing 1~10 day; B) nano silica powder is dispersed in ethanolic soln, the weight ratio that is then 1:2~10 according to B solution than A solution adds B solution in A solution, after stirring, can become follow-up plated film colloidal sol;
(3) sol coating masking: at glass baseplate surface plated film, form certain thickness film;
(4) film hardening: film is through 200~400 ℃ of heat treatment for solidification in baking oven, and the solvent in volatilization colloidal sol, makes film tight adhesion at glass surface;
(5) cooling rear test package.
Further, the film coating method of described step (3) comprises dipping method of pulling up, method of roll coating, spin coating method, and thickness is 120~130nm.
Further, in described step (2), organic precursor of silicon comprises TEOS, silane and TMOS, preferably TEOS.
Further, the alcohols in described step (2) comprises ethanol, propyl alcohol, Virahol and methyl alcohol.
Preferably alcohols is ethanol.
A kind of individual layer SiO of the present invention
2anti-reflection film can be used for following field:
(1) the anti-reflection and self-cleaning performance for sun power packaged glass promotes;
(2) the anti-reflection and self-cleaning performance for solar energy collector glass promotes;
(3) for the anti-reflection of building glass and automatically cleaning modification.
Beneficial effect of the present invention:
(1) product of the present invention possesses good self-cleaning function and outstanding chemical stability, and water droplet contact angle is less than 15 degree, has overcome traditional Si O
2the bad stability of anti-reflection film, the shortcoming that bonding strength is weak and self-cleaning ability is weak;
(2) colloidal sol that prepared by the present invention possesses unsurpassed thixotropy, i.e. the controlled peptization characteristic of ultra-long time, not gelling automatically when solvent exists;
(3) product of the present invention also possesses characteristic acidproof, scratch resistance;
(4) after product plated film, the outward appearance of product own and former no significant difference, overall appearance, and wear-resisting, acidproof, weather, cohesive force are strong;
(5) preparation were established of product of the present invention rationally, simply.
Accompanying drawing explanation
Fig. 1 is technological line schematic diagram of the present invention.
Fig. 2 is the product antireflective effect figure of the embodiment of the present invention 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is elaborated.
Embodiment 1
(1) base plate glass pre-treatment: base plate glass is distinguished to ultrasonic 30 minutes in acetone soln and ethanolic soln;
(2) SiO
2the preparation of colloidal sol: this colloidal sol adopts two step synthesis:
A) adopt traditional sol-gel method to prepare dilute acidic SiO
2colloidal sol is as mother solution, and preparation method is as follows: by TEOS, second alcohol and water, as presoma, mixes according to the ratio of mol ratio 1:30:4, adds salt acid for adjusting pH to 2, stir, and room temperature ageing 1~10 day;
B) nano silica powder is dispersed in ethanolic soln, the weight ratio that is then 1:2 according to B solution than A solution adds B solution in A solution, after stirring, can become follow-up plated film colloidal sol;
(3) sol coating masking: utilize dipping method of pulling up at glass baseplate surface plated film, form the film of 120~130nm thickness;
(4) film hardening: film is through 200 ℃ of heat treatment for solidification in baking oven, and the solvent in volatilization colloidal sol, makes film tight adhesion at glass surface;
(5) cooling rear test package.
embodiment 2
(1) base plate glass pre-treatment: base plate glass is distinguished to ultrasonic 30 minutes in acetone soln and ethanolic soln;
(2) SiO
2the preparation of colloidal sol: this colloidal sol adopts two step synthesis:
A) adopt traditional sol-gel method to prepare dilute acidic SiO
2colloidal sol is as mother solution, and preparation method is as follows: using TMOS, first alcohol and water as presoma, according to the ratio of mol ratio 1:30:4, mix, add salt acid for adjusting pH to 5, stir, room temperature ageing 10 days;
B) nano silica powder is dispersed in ethanolic soln; Then the weight ratio that is 1:10 according to B solution than A solution adds B solution in A solution, after stirring, can become follow-up plated film colloidal sol;
(3) sol coating molding: adopt spin coating method at glass baseplate surface plated film, form the thick film of 130nm;
(4) film hardening: film is through 400 ℃ of heat treatment for solidification in baking oven, and the solvent in volatilization colloidal sol, makes film tight adhesion at glass surface;
(5) cooling rear test package.
Above-described embodiment is only in order to illustrate technical scheme of the present invention; but not design of the present invention and protection domain are limited; those of ordinary skill in the art modifies or is equal to replacement technical scheme of the present invention; and not departing from aim and the scope of technical scheme, it all should be encompassed in claim scope of the present invention.