A new organofunctionalized silica containing thioglycolic acid incorporated for divalent cations removal—A thermodyamic cation/basic center interaction

Silva, André L.P.; Sousa, Kaline S.; Germano, A.F.S.; Oliveira, Vaeudo V.; Espı́nola, José G.P.; Fonseca, Maria G.; Airoldi, Cláudio; Arakaki, T.; Arakaki, Luiza N.H.

doi:10.1016/j.colsurfa.2008.09.010

Cited by 48 publications

(18 citation statements)

References 26 publications

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“…The absorption bands at 1112 cm À1 are due to the siloxane vibrations of (SiO) n groups (Bois et al, 2003). The peaks at 3443 and at 1634 cm À1 are attributed to O-H stretching band of the surface of silanol groups and the remaining adsorbed water molecules (Silva et al, 2009). After modification of silica nanoparticles with APTS (Figure 3), the new peaks can be assigned as follows: the bands at 2870 and 2824 cm À1 are due to asymmetrical and symmetrical stretching vibrations of CH 2 groups, respectively (Naghizadeh et al, 2015).…”

Section: Results and Discussion Characterization Of The Amine Fsnpsmentioning

confidence: 99%

Surface functionalization of silica nanoparticles to improve the performance of water flooding in oil wet reservoirs

Azarshin

Moghadasi

Aboosadi

2017

Energy Exploration & Exploitation

105

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Over the past few years, increasing attention has been devoted to the applications of special engineered nanoparticles in enhancing oil recovery. Earlier studies reported the effects of these particles on wettability alteration of reservoir rock. The present study presents a new method for modifying the surface properties of silica nanoparticles to make them more effective for enhancing oil recovery purposes. Contact angle, interfacial tension measurements, and core flood experiments were performed to examine the effects of these surface-modified nanoparticles on the interfacial interactions of injected water and reservoir rock and oil sample. To improve the performance of water flooding, surface-modified nanoparticles were produced in laboratory and it was found that amine-functionalized silica nanoparticles are significantly more effective than typical nanoparticles. Experimental results revealed that both contact angle and interfacial tension decrease more in the presence of functionalized nanoparticles. These results were confirmed by performing core flood tests which showed an 18% increase in total oil recovery compared to typical nanoparticles. Therefore, amine-functionalized silica nanoparticles could be more effective than typical nanoparticles in increasing the sweep efficiency by changing the wettability of reservoir rock and reducing oil/water interfacial tension. Moreover, it was observed that there is an optimum concentration for contact angle and interfacial tension reduced by nanoparticles and in concentration more than this threshold value the interfacial tension starts to increase slightly.

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Section: Results and Discussion Characterization Of The Amine Fsnpsmentioning

confidence: 99%

Surface functionalization of silica nanoparticles to improve the performance of water flooding in oil wet reservoirs

Azarshin

Moghadasi

Aboosadi

2017

Energy Exploration & Exploitation

105

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“…An abrupt loss in mass detected in the third mass loss region (28.40%), from 400 to 700 • C, suggesting the progressive release of the sporopolleninattached silane molecules (APTS). Sp-APTS-GA was more thermally stable than Sp-APTS and Sp and showed three decomposing transitions [15,16].…”

Section: At Aroundmentioning

confidence: 98%

Isotherms and thermodynamics for the sorption of heavy metal ions onto functionalized sporopollenin

Gübbük

2011

Journal of Hazardous Materials

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“…associating hydroxyl and the bending vibration of hydroxyl of the silica gel, respectively [36]. As illustrated in Fig.…”

Section: Preparation and Characterization Of Mips For Pahsmentioning

confidence: 96%

Determination of 16 polycyclic aromatic hydrocarbons in seawater using molecularly imprinted solid-phase extraction coupled with gas chromatography-mass spectrometry

Song

et al. 2012

Talanta

148

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A new organofunctionalized silica containing thioglycolic acid incorporated for divalent cations removal—A thermodyamic cation/basic center interaction

Cited by 48 publications

References 26 publications

Surface functionalization of silica nanoparticles to improve the performance of water flooding in oil wet reservoirs

Surface functionalization of silica nanoparticles to improve the performance of water flooding in oil wet reservoirs

Isotherms and thermodynamics for the sorption of heavy metal ions onto functionalized sporopollenin

Determination of 16 polycyclic aromatic hydrocarbons in seawater using molecularly imprinted solid-phase extraction coupled with gas chromatography-mass spectrometry

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