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Fluorosilane

Fluorosilane

Fluorosilane is composed of carbon atoms, hydrogen atoms, oxygen atoms, etc., and its hydrolysis rate is fast, producing active silanols, which can react with hydroxyl, carboxyl and oxygen-containing groups. Common silanes and their polymers have the advantages of strong heat resistance, high-quality hydrophobicity, and stable properties, but their oil resistance and corrosion resistance are poor, which affects their further use. Fluorine-containing silanes and polymers are a new type of organosilicon material, which combines the advantages of organosilicon and organofluoride, and is a new hot spot in the current field.

The application

  • Fluorosilane can be used as an anti-fingerprint agent for glass products such as advanced mobile phone screens and camera lenses.
  • Fluorosilane can be used as coatings for electronics
  • Fluorosilane can be used for self-cleaning of glass and other products. The low refractive index of fluorosilane can prevent the reflection of light from the substrate.
  • Fluorosilanes are also used for the modification of superhydrophobic surfaces, such as the preparation of high-efficiency hydrophobic oil-absorbing sponges by cross-linking agents, which not only maintains the high porosity of the sponges, but also obtains the characteristics of efficient hydrophobic absorption.

Sponge surface modification with fluorosilane enables excellent performanceFigure 1. Sponge surface modification with fluorosilane enables excellent performance

  • Fluorosilanes can realize coupling reactions under the action of catalysts, such as the synergistic activation of Lewis acid interaction and the conversion of Z-type fluorosilane ligands to X-type silyl moieties under the condition of Pd/Ni as catalysts.

Fluorosilanes can promote the coupling reaction under certain catalysisFigure 2. Fluorosilanes can promote the coupling reaction under certain catalysis

  • Fluorosilanes are a very promising class of materials that form low surface energy polymer networks that can be surface treated to achieve superhydrophobicity and enhanced hydrophobicity, to protect the surface of marble, wood, glass, silicon wafers, brass, paper and silk.

Fluorosilanes can improve surface hydrophobicity for protection purposesFigure 3. Fluorosilanes can improve surface hydrophobicity for protection purposes

Custom synthesis

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References

  1. Hajime, K.; et al. Fluorosilane Activation by Pd/Ni→Si–F→Lewis Acid Interaction: An Entry to Catalytic Sila-Negishi Coupling. J Am Chem Soc. 2020, 142(33): 14039–14044.
  2. Chen, G.C.; et al. Method for preparing high-efficiency hydrophobic oil-absorbing sponge with fluorine-containing silane coupling agent as cross-linking agent. CN201610845619.
  3. Saboori, R.; et al. Synthesis of fluorine-doped silica-coating by fluorosilane nanofluid to ultrahydrophobic and ultraoleophobic surface. Materials Research Express. 2017, 4(10):
  4. Bhushan, B.; et al. Surface modification of silicon and polydimethylsiloxane surfaces with vapor-phase-deposited ultrathin fluorosilane films for biomedical nanodevices. Journal of Vacuum Science & Technology A. 2006, 24(4): 1197.
  5. Fotios, G.; et al. Fluorosilane Water-Repellent Coating for the Protection of Marble, Wood and Other Materials. Adamopoulos Heritage. 2021, 4(4): 2668-2675.

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