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Hybrid assembly of nanosol titania and dodecylamine for superhydrophobic self-cleaning glass

  • Indriana KartiniEmail author
  • Sri Juari Santosa
  • Erna Febriyanti
  • Oky Ragil Nugroho
  • Hua Yu
  • Lianzhou Wang
Research Paper

Abstract

This study presents the formation of superhydrophobic films on glass surface resulted from hybrid assembly of inorganic–organic layers based on sol–gel-derived titania (TiO2)/dodecylamine (DDA). One-step and layer-by-layer (LbL) dip-coating approaches are compared and discussed as well as the effect of film annealing rates on the resulting hydrophobicity of glass surfaces. The hydrophobicity was obtained by measuring the water contact angle (WCA) of the films. It is shown that slow annealing rate combined with LbL sol–gel dip-coating produced robust coating with reasonable transparency. The effect of multiple coating and C to Ti mole ratios to the surface hydrophobicity of the resulted films is also reported. As a result, film transparency decreased with increasing coating times. Meanwhile, the C/Ti mole ratios predominantly affect WCA at higher coating numbers. Superhydrophobicity of WCA as high as 155.5° was observed for translucent hybrid film after three-time coating at C/Ti mole ratio of 7. The AFM image confirmed the surface roughness of 78 nm supported with homogeneous interconnected hybrid clusters of TiO2–DDA over the film surface as shown by the corresponding SEM images. Microhardness tester employing Vickers hardness number (VHN) was used to access the mechanical adhesion of the hybrid films by representing the film retention to scratching. It is observed that VHN increased as the C/Ti mole ratio increased with optimum condition achieving at C/Ti mole ratio of 5 (VHN of 60 kgf/mm2). All films have demonstrated good retention of hydrophobicity for 4 weeks outdoor at high-humidity (RH > 90 %) exposure. This work is expected to pave a way to the creation of transparent superhydrophobic films based on environmentally benign TiO2 inorganic–organic hybrid materials.

Keywords

Superhydrophobic Self-cleaning glass Hybrid film TiO2-dodecylamine Sol–gel method 

Notes

Acknowledgments

The present study was supported by a Grant-in-Aid for International Research Collaboration and Scientific Publication from Indonesian Directorate General of Higher Education No. LPPM-UGM/1000/LIT/2014 and IPM UGM under contract no LPPM-UGM/2194/BID.I/2012. The authors also thank Dr. Risa Suryana (Physics Department, Universitas Negeri Surakarta) for his assistance with acquiring AFM images and Dr. Deendarlianto (Faculty of Engineering, Universitas Gadjah Mada) with water contact angle measurement.

Supplementary material

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Supplementary material 1 (TIFF 495 kb)
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Supplementary material 3 (TIFF 6273 kb)
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Supplementary material 4 (PDF 31 kb)

Supplementary material 5 (MPG 46102 kb)

Supplementary material 6 (MPG 31522 kb)

Supplementary material 7 (MPG 21646 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Indriana Kartini
    • 1
    • 2
    Email author
  • Sri Juari Santosa
    • 2
  • Erna Febriyanti
    • 1
    • 2
  • Oky Ragil Nugroho
    • 1
    • 2
  • Hua Yu
    • 3
  • Lianzhou Wang
    • 3
  1. 1.Functional Coating Materials Research Group, Department of ChemistryUniversitas Gadjah MadaSekip Utara, YogyakartaIndonesia
  2. 2.Department of ChemistryUniversitas Gadjah MadaSekip Utara, YogyakartaIndonesia
  3. 3.Nanomaterials Centre, School of Chemical Engineering and AIBNThe University of Queensland (UQ)BrisbaneAustralia

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