Preparation of Nano-SiO₂ / amino-modified polysiloxane hybrid superhydrophobic coating and thermal-stability characterization

Abstract

We put forward a large-area and cost-effective method to fabricate superhydrophobic coating by introducing in-situ functionalized nano-SiO₂ into side-amino modified hydroxy-terminated polydimethylsiloxane (SA-HTPDMS) curing system. With the characterization using water contact angle (WCA) tester, Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), atomic force microscopy (AFM) and simultaneous thermal analysis, the as-prepared coating displayed a tremendous WCA of 154.8±1°, sliding angle (SA) about 3.5° and stable self-cleaning property range from −10 to 80 °C. It was also found that the synergistic effect of surface micro-nano hierarchical structure and chemical hydrophobicity, stability from matrix had made contributions to the superhydrophobicity and excellent heat resistance up to 300 °C.

Keywords

nano-SiO₂ / amino-modified polysiloxane / thermal-stability / superhydrophobic

References

[1] Yao X, Song Y, Jiang L Applications of Bio-inspired Special Wettable Surfaces[J]. Adv. Mater., 2011, 23(6): 719-734.

[2] Duan H, Wang H Z, Zhao L, . The Fabrication of Microstructure Surface of Super-hydrophobic Coating by Surface Gelation Technology[J]. J. Wuhan University of Technology-Mater. Sci. Ed., 2008, 23(2): 163-165.

[3] Furstner R, Barthlott W, Neinhuis C, . Wetting and Self-cleaning Properties of Artificial Super-hydrophobic Surfaces[J]. Langmuir, 2005, 21: 956-961.

[4] Cao L, Jones A K, Sikka V K, . Anti-icing Super-hydrophobic Coatings[J]. Langmuir, 2009, 25(21): 12 444-12 448.

[5] Feng L, Zhang Z Y, Mai Z H, . A Super-hydrophobic and Superoleophilic Coating Mesh Film for the Separation of Oil and Water[J]. Angew. Chem., Int. Ed., 2004, 43: 2 012-2 014.

[6] Cao F, Guan Z S, Li D X Preparation of Material Surface Structure Similar to Hydrophobic Structure of Lotus Leaf [J]. J. Wuhan University of Technology-Mater. Sci. Ed., 2008, 23(4): 513-517.

[7] Fresnais J, Chapel J P, Poncin-Epaillard F Synthesis of Transparent Superhydrophobic Polyethylene Surfaces[J]. Surf. Coat. Tech., 2006, 200: 5 296-5 305.

[8] Lau K K S, Bico J, Teo K B K, . Superhydrophobic Carbon Nanotube Forests[J]. Nano Lett., 2003, 3: 1 701-1 705.

[9] Erbil H Y, Demirel A L, Avci Y, . Transformation of a Simple Plastic into a Superhydrophobic Surface[J]. Science, 2003, 299: 1 377-1 380.

[10] Cui S, Lin B L, Liu Y, . Preparation and Adsorption Property of Hydrophobic SiO₂ Aerogels Modified by Methyl-triethoxysilane[J]. J. Wuhan University of Technology-Mater. Sci. Ed., 2011, 26(6): 1 079-1 083.

[11] Qu A L, Wen X F, Pi P, . Morphologies and Superhydrophobicity of Hybrid Film Surfaces Based on Silica and Fluoropolymer[J]. J. Mater. Sci. Technol., 2008, 24(5): 693-698.

[12] Ding X F, Zhou S X, Gu G, . A Facile and Large-area Fabrication Method of Super-hydrophobic Self-cleaning Fluorinated Polysiloxane/ TiO₂ Nanocomposite Coatings with Long-term Durability[J]. J. Mater. Chem., 2011, 21: 6 161-6 164.

[13] Stöber W, Fink A, Bohn E Controlled Growth of Monodisperse Silica Spheres in the Micron Size Range[J]. J. Colloid. Interf. Sci., 1968, 26(1): 62-69.

[14] Westcott S L, Oldenburg S J, Lee T R, . Formation and Adsorption of Clusters of Gold Nanoparticles onto Functionalized Silica Nanoparticle Surfaces[J]. Langmuir, 1998, 14(19): 5 396-5 401.

[15] Roach P, Shirtcliffe N J, Newton M I Progess in Superhydrophobic Surface Development[J]. Soft Matter., 2007, 4(2): 224-240.

[16] Verho T, Bower C, Andrew P, . Mechanically Durable Superhydrophobic Surface[J]. Adv. Mater., 2011, 23(5): 673-678.

[17] Gao X, Jiang L Biophysics: Water-repellent Legs of Water Striders[J]. Nature, 2004, 432(7013): 36-36.

[18] Chen H P Endgroup-assisted Siloxane Bond Cleavage in the Gas Phase[J]. J. Am. Soc. Mass Spectrom., 2003, 14: 1 039-1 048.