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Study of Surface Wettability Change of Unconsolidated Sand Using Diffuse Reflectance Infrared Fourier Transform Spectroscopy and Thermogravimetric Analysis
- Source :
- Applied Spectroscopy. 72:562-572
- Publication Year :
- 2018
- Publisher :
- SAGE Publications, 2018.
-
Abstract
- The effects exerted by the adsorption of vapors of a non-polar compound (deuterated benzene) and a polar compound (water) on the surface of Ottawa sand and a sample of reservoir sand (Channel), which was previously impregnated with silicon oil or two kinds of surfactants, (2-hydroxyethyl) trimethylammonium oleate (HETAO) and (2-hydroxyethyl)trimethylammonium azelate (HETAA), were studied by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and thermogravimetric analysis (TGA). The surface chemistry of the sandstone rocks was elucidated by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX). Terminal surface groups such as hydroxyls can strongly adsorb molecules that interact with these surface groups (surfactants), resulting in a wettability change. The wettability change effect suffered by the surface after treating it with surfactants was possible to be detected by the DRIFTS technique, wherein it was observed that the surface became more hydrophobic after being treated with silicon oil and HETAO; the surface became more hydrophilic after treating it with HETAA.
- Subjects :
- Thermogravimetric analysis
Materials science
Diffuse reflectance infrared fourier transform
Analytical chemistry
Infrared spectroscopy
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Adsorption
X-ray photoelectron spectroscopy
Wetting
Fourier transform infrared spectroscopy
0210 nano-technology
Spectroscopy
Instrumentation
Subjects
Details
- ISSN :
- 19433530 and 00037028
- Volume :
- 72
- Database :
- OpenAIRE
- Journal :
- Applied Spectroscopy
- Accession number :
- edsair.doi.dedup.....4937ce72f871535a9c7b05e726da1356