Fabrication and characterization of robust hydrophobic lotus leaf-like surface on Si3N4 porous membrane via polymer-derived SiNCO inorganic nanoparticle modification |
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| Authors: | Yan-Dong Xu Zhen-Yu Zhu Tian-Zhao Xu Hamidreza Abadikhah Jun-Wei Wang Xin Xu Simeon Agathopoulos |
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| Affiliation: | 1. Sinopec Northwest Oilfield Branch, Research Institute of Petroleum Engineering, Ürümqi, Xinjiang 830001, PR China;2. CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China;3. Department of Materials Science and Engineering, University of Ioannina, GR-451 10 Ioannina, Greece |
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| Abstract: | Robust hydrophobic surface was produced by modifying the surface of porous Si3N4 membrane, via aminolysis and pyrolysis process, with organosilane-derived inorganic SiNCO nanoparticles, which are tightly adhered to the Si3N4 grains. The resultant material had a high water contact angle of 142°, attributed to -Si-CH3 surface terminal groups and a lotus leaf-like hierarchical structure of the nanoparticles, which had a frame structure with Si-N and Si-O covalent bonds in their bulk. The hydrophobic behavior remained practically unchanged after exposure of the produced membranes to aqueous solutions of humic acid, HCl and NaOH, to benzene, as well as to stirring abrasive slurry with SiC particles, and after exposure at high temperatures, up to 500?°C, to air. The inorganic membrane can be considered for use in a broad range of applications which require robust hydrophobic surfaces. |
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| Keywords: | Inorganic nanoparticles modifier Hierarchical structure Robust hydrophobicity |
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