In Coatings - GELS / Alfa Chemistry

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In Coatings

Over the years, aerogels have gained increasing attention due to their extraordinary properties (light, heat, sound, electricity, force, etc.) and application potentials in various fields. Several studies have been carried out regarding aerogel preparation and their applications in coatings on different substrates. The main goals of aerogel used in coatings are to obtain some performances such as super-thermal insulation, super-hydrophobicity, UV radiation protection, color fastness, and antimicrobial preservation. Generally, the coating techniques of aerogels on different substrates mainly include dip-coating, spin-coating, and spray-coating.

Major Applications of Aerogels in Coatings

Aerogel coatings on textiles

Aerogels can be used for developing novel anti-wetting, self-cleaning and thermal-insulating coatings on textiles. Some reports show that constructing hybrid organic-inorganic aerogel composite coatings is an effective way to improve the durability of coatings. Therefore, in recent years, several studies have been conducted on the coating of aerogels on textiles to induce hydrophobicity through different coating techniques. For example, Xu and coworkers prepared a superhydrophobic cotton fabric with a water contact angle of 155.6±0.9° for a 5 µL water droplet via a dip-coating process using the (polydimethylsiloxane) PDMS/SiO₂ aerogel composite solution^[1].

Aerogel coatings on leather

Aerogel coatings on leather

At present, aerogel-modified coatings for leather are still in the early stages of exploration, but a large number of studies have been widely carried out on advanced leather finishing agents to induce special properties by aerogels. For example, Hu and coworkers utilized the properties of aerogels to prepare exceptional leather finishing agents by modifying acrylic resin. The water vapor permeability of leather treated with this type of leather finishing agents was increased by 9.15% and the finish adhesion was increased by 10.35%^[2].

Aerogel coatings on other substrates

In recent years, advanced applications of aerogel coatings on different substrates such as chemical protection, orthopedic application, and microwave absorption have been realized. Horvata et al^[3]. proposed a strategy to prepare a new type of high methoxy pectin-xanthan gum aerogel-coated medical grade stainless steel, which will promote the development of biomedicine.

Aerogel coatings on other substrates

What Can We Do?

At Alfa Chemistry, our team has a deep understanding of the application of aerogels in coatings. At the same time, we are also exploring more new possibilities for aerogels in coatings. If you have encountered some challenges during the implementation of the project, please contact us and we will be happy to help you.

References

Xu, L.H.; et al. Preparation of superhydrophobic porous SiO₂ aerogel using methyl trimethoxy silane single precursor and superhydrophobic cotton fabric coating from it. Journal of Nanoscience and Nanotechnology. 2019, 19: 7799-7809.
Ma, J.Z.; et al. Preparation of acrylic resin/modified nano-SiO2 via sol-gel method for leather finishing agent. Journal of Sol-Gel Science and Technology. 2007, 41: 209-216.
Horvat, G.; et al. Novel ethanol-induced pectin-xanthan aerogel coatings for orthopedic applications. Carbohydrate Polymers. 2017, 166: 365-376.

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