The Synthesis of Super-Hydrophobic Nano-Silica and its Effect to the Surface Wettability of Sandstone

Xiao Xiao Ni; Guang Cheng Jiang; Li Li Yang

doi:10.4028/www.scientific.net/MSF.917.140

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The Synthesis of Super-Hydrophobic Nano-Silica and its Effect to the Surface Wettability of Sandstone

Abstract:

In this paper, the researcher synthesis a super-hydrophobic nanosilica to alter the wettability of the sandstone surface from hydrophilic to super-hydrophobic. Fourier transform infrared (FTIR), Thermogravimetric analysis (TGA), Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) were used to test the characterization of the products, and the wettability were examined by contact angle measurement, glass capillary tube rise measurement and spontaneous imbibition tests. The results shows that the water contact angle is over 150°,the liquid level is down to-42mm and the spontaneous volume is only 0.025mL after the surface modified with super-hydrophobic nanosilica which means the surface wettability is altered to be super-hydrophobic.