Method of manufacturing a fluorocarbon-based coating film
a technology of fluorocarbons and coating films, applied in coatings, material nanotechnology, plasma techniques, etc., can solve the problems of limited adhesion of polymers to substrates, insufficient methods in view of adhesion and mechanical strength, etc., and achieve the effect of improving the performance of an apparatus
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example 1
[0088]A hydrophilic substrate 1, i.e., a glass substrate, was prepared as shown in FIG. 1(a).
[0089]The substrate 1 was coated with what was obtained by dissolving 1% wt of Cl—(SiCl2O)2—SiCl3 as the material having a chlorosilyl group in chloroform solvent.
[0090]Also hydrophilic —OH substitute groups were contained on the surface of the substrate 1. Thus, a hydrochloric acid removal reaction (dehydrochloric acid) was brought about on the surface to fix molecules to the surface of the substrate 1 via —SiO—bonds, for example as shown by the formula [1];
[0091]With subsequent evaporation of the chloroform solvent in an atmosphere containing moisture from water content, a siloxane polymer coating film 2 was shown in FIG. 1(b) was formed with hydrochloric acid removal reaction between the moisture and —Cl groups without being reacted with the substrate 1.
[0092]The siloxane polymer coating film 2 thus formed was bonded to the surface of the substrate 1 via chemical bonds of —SiO—and thus d...
example 2
[0099]A hydrophilic substrate 1 was prepared as same as in Example 1, as shown in FIG. 2(a).
[0100]The substrate 1 was dipped for about one hour in a solution obtained by dissolving 1% wt of Cl—(SiCl2O)2—SiCl3 as a material having chlorosilyl groups in chloroform solvent as in Example 1. A hydrochloric acid removal reaction thus was brought about on the surface of the substrate 1 because of the presence of hydrophilic —OH groups on the surface to adsorb molecules as shown above formula [1].
[0101]By subsequently carrying out washing with non-aqueous solvent, i.e., chloroform, and then with water, molecules of Cl—(SiCl2O)2—SiCl3 which remained without being reacted with the substrate 1, were removed to leave a siloxane monomolecular film 4 on the surface of the substrate 1 as shown in FIG. 2(b) and given as the formulas [A] and / or [B] etc.
[0102]The monomolecular film 4 thus obtained was perfectly bonded to the substrate 1 via chemical bonds of —SiO—and was not easily separated.
[0103]T...
example 3
[0111]As shown in Example 1, a hydrophilic substrate 11 was prepared as shown in FIG. 3(a).
[0112]This substrate 11 was then dipped in a solution obtained by dissolving 1% wt of a material having a chlorosilyl group in a non-aqueous solvent such as a chloroform solvent and then was raised from the solution.
[0113]By using Cl—(SiCl2O)2—SiCl3 as a material having a plurality of chlorosilyl groups in a molecule, a hydrochloric acid removal reaction was brought about because of the presence of hydrophilic—OH groups on the surface of the substrate 11, thus fixing molecules to the substrate via —SiO— bonds as shown above formula [1].
[0114]By subsequently evaporating the chloroform solvent in an atmosphere containing of moisture, chlorine in —SiCl groups that remained without being reacted with the substrate 11 were then reacted with the water by a hydrochloric acid removal reaction to form a siloxane polymer coating film 12 as shown in FIG. 3(b).
[0115]As the siloxane polymer coating film 12...
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Abstract
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