Customized Nanocoating on Titania Substrate
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Titanium dioxide, also known as rutile and anatase, is a white, water-insoluble inorganic compound solid that occurs in nature as the minerals rutile and anatase. Its refractive index and color make it an excellent reflective optical coating for dielectric mirrors when placed as a thin sheet.
Alfa Chemistry provides titanium dioxide surface modification services that provide significant performance benefits in a variety of applications. You may improve the surface features of practically any titanium dioxide-related product using our extensive and specialized surface treatment technologies. Join together with us to change the surface properties of your products quickly and easily!
Alfa Chemistry offers customers a variety of surface coating technologies for semiconductor materials that can be used to functionalize titanium dioxide surfaces and impart a variety of different surface properties. Our surface modification technologies include, but are not limited to, the following. For more technical information, please contact us.
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Case 1: Fluorine Modified Titanium Dioxide Particles
Anti-icing is a critical technology for human civilisation to be able to operate in freezing weather at high latitudes. Alfa Chemistry has successfully added fluorine to titanium dioxide particles (TiO2) to improve anti-icing capabilities by creating a highly hydrophobic surface. Organic fluorine chains aid in the creation of extremely hydrophobic surfaces.
We first modified the TiO2 double bond with 3-methacryloxypropyl-trimethoxysilane (MPS) to introduce a C=C bond. Then, dodecafluoroheptyl methacrylate (DFHMA) monomer was successfully grafted onto the TiO2 particles through the C=C bond introduced by MPS. double bond here, azo diisobutyronitrile (AIBN) was used as an initiator to initiate the reaction.
The water contact angle on the surface of the fluorine-modified particles was substantially higher than that of untreated TiO2, which had better anti-icing properties due to its hydrophobic surface. On fluorine-modified TiO2, the water droplet crystallization temperature was lowered to -19.4 °C. Furthermore, at a test temperature of -10 °C, the fluorine-modified TiO2 demonstrated remarkable anti-icing efficacy, with a freezing delay duration of more than 25 minutes.
Fig 1. TEM micrographs of (a) unmodified TiO2; (b) TiO2 (MPS); (c) TiO2 (MPS + DFHMA + AIBN-2.0%). (Qi Y, et al. 2019)
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