Study of Surface Wettability Change of Unconsolidated Sand Using Diffuse Reflectance Infrared Fourier Transform Spectroscopy and Thermogravimetric Analysis

Diana Gómora-Herrera, Juan Navarrete Bolaños, Irina V. Lijanova, Octavio Olivares-Xometl, Natalya V. Likhanova

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

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.

Original languageEnglish
Pages (from-to)562-572
Number of pages11
JournalApplied Spectroscopy
Volume72
Issue number4
DOIs
StatePublished - 1 Apr 2018

Keywords

  • Diffuse reflectance infrared Fourier transform
  • X-ray photoelectron spectroscopy
  • surface wettability
  • unconsolidated sand

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