Crystal coating element and its preparation method, crystal film system
A technology of crystal film and crystal, applied in the direction of coating, etc., can solve problems such as crystal film layer cracking
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[0090] The application also provides a method for preparing a crystal coating element, comprising:
[0091] will contain polymethylsiloxane and SiO 2 The first sol is solidified to obtain a matching film after forming a film on the surface of the crystal substrate;
[0092] will then contain SiO 2 The second sol is solidified after forming a film on the surface of the matching film to obtain an anti-reflection film. Wherein, the weight average molecular weight of the polymethylsiloxane is 5000-8000.
[0093]First form a matching film on the surface of the crystal substrate; mainly including polymethylsiloxane, SiO 2 The first sol is prepared after being mixed with the solvent, and the first sol is solidified after forming a film on the surface of the crystal substrate.
[0094] In an embodiment of the present application, the solvent may include at least one of ethanol, methanol, butanol, and heptane. During the curing process, the solvent evaporates and the final matchin...
Embodiment 1
[0132] This embodiment provides a kind of LBO crystal coating element, mainly makes through the following method:
[0133] 1) Preparation of polymethylsiloxane
[0134] Add 1783g of methyltriethoxysilane (MTES), 266.8g of absolute ethanol and 586.8g of deionized water into the reactor respectively, heat to 80°C, and when the liquid in the reactor begins to boil, add 198g of deionized water and 184g ethanol mixture. After reflux for 20 hours, start to distill the ethanol in the reactor, so that the final mass fraction of polymethylsiloxane is about 33%, and polymethylsiloxane is obtained.
[0135] The polymethylsiloxane is freeze-dried, and the molecular weight of the organic polymethylsiloxane is tested by gel permeation chromatography (GPC), and its weight average molecular weight Mw=6130, and the test results are as follows: figure 1 shown. The nuclear magnetic pattern of the polymethylsiloxane is as follows figure 2 shown. figure 2 Among them, c represents a cyclic s...
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