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Fabrication of TiO2/SiO2/Ag/PDMS superhydrophobic coating for efficient oil/water separation

  • Original Paper: Sol-gel and hybrid materials with surface modification for applications
  • Published:
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Abstract

Adsorption based materials play a rather important prospect in the treatment of petroleum. Currently, most of the adsorbent materials work based on substrates such as sponges and aerogels, to endow super-hydrophobic/super-oleophilic properties on the membrane surface. As the adsorbent material reaches the end of its useful life, it undoubtedly further exacerbates the burden on the environment from an environmental protection perspective. Here, we modified the recycled discarded air filter with polydimethylsiloxane (PDMS), γ-aminopropyltriethoxysilane (KH-550), TiO2, SiO2, and Ag. The results showed that the prepared PDMS-1 (TiO2/SiO2/Ag)@ discard air filter has excellent super-hydrophobicity and enhanced antibacterial properties, and possesses mechanical durability and chemical stability. The modified discarded air filter had an absorption capacity of up to 23.2 g/g of carbon tetrachloride. This research provides a new oil-absorbent substrate with a secondary use strategy to reduce environmental damage. Ultimately, it exhibits excellent performance almost indistinguishable from other adsorbent materials.

Graphical Abstract

This graphic abstract focuses on the preparation process of super-hydrophobic/super-oleophilic discarded air cartridges for oil adsorption. We modified the recycled discarded air filter with polydimethylsiloxane (PDMS), γ-aminopropyltriethoxysilane (KH-550), TiO2, SiO2, and Ag. The results show that the modified discarded air cartridge surface is super-hydrophobic/super-oleophilic, and also has excellent oil absorption capacity.

Highlights

  • A facile method was developed to prepare superhydrophobic TiO2/SiO2/Ag nanoparticle coating.

  • The superhydrophobic discard air filters were fabricated by simple dip coating method.

  • The contact angle of water on the superhydrophobic surface is more than 154°.

  • Impressive antibacterial activities and resistance to both acid and alkali.

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Funding

The work was supported by the Tianjin Research Innovation Project for Postgraduate Students (2021YJSS350).

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Authors and Affiliations

  1. School of Science, Tianjin Chengjian University, Tianjin, 300384, China

    Wei-Guo Yan

  2. School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin, 300384, China

    Wei-Guo Yan, Xiang-Chen Li, Jian-Hua Wei & Zhifeng Liu

  3. Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin, 300384, China

    Wei-Guo Yan & Zhifeng Liu

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Yan, WG., Li, XC., Wei, JH. et al. Fabrication of TiO2/SiO2/Ag/PDMS superhydrophobic coating for efficient oil/water separation. J Sol-Gel Sci Technol 108, 187–199 (2023). https://doi.org/10.1007/s10971-023-06166-y

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