Removal of Oil Pollution in water using hydrophobic silica

Salazar-Hernández, Carmen; Salazar-Hernández, Mercedes; Hernández-Arias, Lizeth Jocelyn; Mendoza-Miranda, Juan Manuel

doi:10.35429/jsi.2021.16.5.1.5

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…The ceramic was synthesized according to the method reported by C. Salazar-Hernández et al [5,6]. Where the polymerization of TEOS (Aldrich, 99%) is carried out by cocondensation using different amounts of PDMS; according to the amounts indicated in Table 1.…”

Section: Hybrid Ceramic Synthesismentioning

confidence: 99%

SiO2/PDMS functionalized hybrid ceramics: effect of functional group on hydrophobic behavior

Villegas-Alcaraz

2023

JSL

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In this paper, the hydrophobic effect of the functional group in a hybrid ceramic synthesized from tetraethyl orthosilicate (TEOS) and polydimethylsiloxane (PDMS) is investigated. The hybrid ceramics were synthesized using di-butyl-di-di-tin laurate (DBTL) as a polycondensation catalyst and different concentrations of the polysiloxane chain varying from 20-40%w. Infrared spectroscopy confirmed the formation of the hybrid material, observing the corresponding signals for the siloxane bond (Si–O–Si) corresponding to the silica network, inorganic fragment (1100 cm–1 ) and those corresponding to the polymer chain (785 cm–1 ) besides, the Si–C bond of the polymer is presented at 1250 cm–1 . The amino functional group was identified as a low intensity signal at 1300 cm–1 (N–C) and 1204 cm–1 (Si– N); on the other hand, the phenyl group was present at 3080 cm–1 for the C–H group of the aromatic ring and with the C=C bond of the ring at 1429, 794 and 845 cm–1 . While the hydrophobic character was evaluated with the contact angle  obtaining a hydrophobic to superhydrophobic behavior with  de 110-130º.

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Section: Hybrid Ceramic Synthesismentioning

confidence: 99%

SiO2/PDMS functionalized hybrid ceramics: effect of functional group on hydrophobic behavior

Villegas-Alcaraz

2023

JSL

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“…Sin embargo, esta puede ser modificada adicionando grupos hidrofóbicos a través de reacciones de post-condensación, método que se conoce como post-síntesis (Figura 1b). La magnitud en el carácter hidrofóbico depende del tipo de grupo R que sea adicionado a la superficie y de la cantidad que logren ser anclados (Salazar-Hernández et al, 2021).…”

Section: Introductionunclassified

Cerámico SiO2/PDMS como removedor de sustancias oleosas en mantos acuíferos

Salazar-Hernández

Hernández-Romo

Gómez-López

et al. 2022

ICBI

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En este trabajo se presenta la síntesis y caracterización de un cerámico híbrido base sílice y polidimetilsiloxano (PDMS) el cual se obtuvo mediante reacciones sol-gel del TEOS condensando con las cadenas de PDMS variando su concentración del 10 al 40%w y empleando HCl como catalizadores sol-gel. La solución sol obtenida es impregnada en un sistema poroso (esponja) para modificar su carácter hidrofílico a hidrofóbico y ser empleada como sistema de remoción de aceite. La modificación de la esponja se evaluó por espectroscopía de infrarrojo observando los modos vibraciones del cerámico, a 1100cm-1 se identificó el enlace siloxano (Si-O-Si) y a 1200 cm-1 (Si-C). Por otra parte, el carácter hidrofóbico se evaluó con el ángulo de contacto observando valores entre 110-130º. La microscopia óptica permitió identificar cambios en la superficie de la esponja debido a la presencia de cerámico y finalmente se determinó el efecto de la cantidad de PDMS sobre la capacidad de remoción de aceite en agua.

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“…Nowadays, water quality is a relevant issue of high environmental concern, since water is exposed to many pollutants, including oily substances that cause serious environmental damage [1]. To remove this type of substances, the use of hydrophobic surfaces has been proposed [2][3][4][5][6]. The modification of a silica using PDMS through the sol-gel method and the use of a polycondensation catalyst to obtain a sol solution containing the structure shown in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

SiO2-PDMS as Oil Removal System

Viridiana¹,

Carmen²,

Mercedes³

et al.

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This paper presents an oil removal system design based on the use of hydrophobic silica (SiO2/PDMS) obtained by the co-condensation of silica with polydimethylsiloxane (PDMS) using DBTL as a polycondensation catalyst. The hydrophobic silica entrapped in the foam was evaluated by gravimetry; in addition, infrared spectroscopy will allow the identification of hydrophobic silica in the foam and the main functional groups in the foam. The hydrophobic character was determined through the modification in the water absorption capacity of the foam and by measuring the contact angle. On the other hand, optical microscopy allowed the identification of changes in the foam surface due to the presence of SiO2/ PDMS. Finally, the effect of the amount of PDMS on the oil-in-water removal capacity was determined.

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Removal of Oil Pollution in water using hydrophobic silica

Cited by 4 publications

References 5 publications

SiO2/PDMS functionalized hybrid ceramics: effect of functional group on hydrophobic behavior

SiO2/PDMS functionalized hybrid ceramics: effect of functional group on hydrophobic behavior

Cerámico SiO2/PDMS como removedor de sustancias oleosas en mantos acuíferos

SiO2-PDMS as Oil Removal System

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