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Preparation method of wear-resistant self-cleaning anti-reflection film on surface of high-temperature vacuum collector tube

A vacuum heat collector tube and anti-reflection film technology, applied in the field of film preparation, can solve the problems of affecting the transmission effect and increasing the light scattering of the film, and achieve the effect of firm bonding and good wear resistance.

Active Publication Date: 2014-12-31
常州龙腾光热科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the surface roughness of the film increases, especially when the lotus leaf-like micro-nano double protrusion structure is formed and coated with fluorosilicone, the film exhibits good hydrophobicity and even reaches a superhydrophobic state with a hydrophobic angle greater than 150°. However, In order to improve the performance of hydrophobic treatment, the roughening treatment on the anti-reflection coating will increase the light scattering of the film, which will seriously affect the transmission effect. In terms of wear resistance, there are high requirements, and it is necessary to find a balance point between roughness and light transmittance, so as to ensure better bonding force with the glass matrix and better wear resistance. It also needs to have certain hydrophobic properties

Method used

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  • Preparation method of wear-resistant self-cleaning anti-reflection film on surface of high-temperature vacuum collector tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment one: In a 500 L reactor, first add 250 L of absolute ethanol, then add 527 mL of concentrated hydrochloric acid, 3.8 L of deionized water, stir for 15 minutes, slowly add 47.9 L of ethyl silicate, stir for 2 hours, then Add 9586 g of hexadecyltrimethylammonium bromide, continue to stir for 2 hours, discharge the feed liquid into the sol A tank, repeat the above process 3~4 times, until the A tank sol is full, place it at room temperature for 3~5 day spare. In a 500 L reactor, first add 285 L of absolute ethanol, then add 50 mL of concentrated hydrochloric acid, 0.36 L of deionized water, stir for 15 minutes, then slowly add 4.5 L of ethyl silicate, stir for 2 hours, then Add 9355 g of cetyltrimethylammonium bromide, continue to stir for 2 hours, discharge the feed liquid into the sol B tank, repeat the above process 3~4 times, until the B tank sol is full, and place it at room temperature for 3~5 day spare.

[0019] 4060×125 mm standard high-temperatur...

Embodiment 2

[0021] Embodiment two: In a 500 L reactor, first add 250 L of absolute ethanol, then add 422 mL of concentrated hydrochloric acid, 12.3 L of deionized water, stir for 15 minutes, slowly add 38.3 L of ethyl silicate, stir for 2 hours, then Add 7668g of cetyltrimethylammonium bromide, continue to stir for 2 hours, discharge the feed liquid into the sol A tank, repeat the above process 3~4 times, until the A tank sol is full, and place it at room temperature for 3~5 days spare. In a 500 L reactor, first add 285 L of absolute ethanol, then add 120 mL of concentrated hydrochloric acid, 3.5 L of deionized water, stir for 15 minutes, slowly add 10.9 L of ethyl silicate, stir for 2 hours, then Add 22554 g of cetyltrimethylammonium bromide, continue to stir for 2 hours, discharge the feed liquid into the sol B tank, repeat the above process 3~4 times, until the B tank sol is full, and place it at room temperature for 3~5 day spare.

[0022] 4060×125 mm standard high-temperature ...

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Abstract

The invention discloses a preparation method of a wear-resistant self-cleaning anti-reflection film on the surface of a high-temperature vacuum collector tube, belonging to the field of a preparation technology of a film. The method comprises the steps of: with absolute ethyl alcohol as a solvent, hydrolyzing ethyl silicate under acid catalysis; adding hexadecyl trimethyl ammonium bromide according to the different proportions to obtain two silica sols with different compositions; utilizing the two sols to plate a two-layer silicon oxide film in the standard high-temperature vacuum collector tube by an outer wall pulling method; calcining for 2h at 350-500 DEG C, and then soaking with 10% trimethyl oxychloride silane alcohol solution for modification to finally obtain the practical anti-reflection film which is firmly combined with a glass tube matrix, is high in abrasive resistance and has the hydrophobic angle of 120 degrees. Besides maintaining higher sunlight transmissivity, the anti-reflection film arranged on the surface of the glass tube is firmly combined with the glass tube matrix, and is good in the abrasive resistance. After being treated by trimethyl oxychloride silane, the surface of the anti-reflection film has the hydrophobic angle of 120 degrees, so that the anti-reflection film has a self-cleaning function.

Description

technical field [0001] The invention relates to a preparation method of a wear-resistant and self-cleaning anti-reflection film on the surface of a high-temperature vacuum heat collecting tube for trough solar thermal power generation, and belongs to the technical field of film preparation. Background technique [0002] In solar thermal utilization, only the trough-type concentrating solar thermal power generation system and technology have achieved commercial operation in the United States, Europe and the Middle East, and the continuous operation time has been more than 20 years. The core component is a high-temperature vacuum heat collector tube. Studies have shown that replacing ordinary glass tubes with glass tubes coated with anti-reflection film can reduce the reflection of the glass surface by 4%. When the fluid temperature in the heat collector tube is 100°C, the annual The average thermal efficiency will increase by 20%, therefore. Coating anti-reflection film on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23
Inventor 陈若愚俞科
Owner 常州龙腾光热科技股份有限公司