SBA-15 modificados con poliésteres polioles como plataformas catalíticas
Date
2017
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Abstract
En este trabajo se sintetizó el material mesoporoso SBA-15 y se modificó por fisisorción con los
polímeros hiperramificados Boltorn®H20, Boltorn®H30 y Boltorn®H40. Las muestras se
caracterizaron mediante la determinación de las áreas específicas (BET), espectrocopía infrarroja
(FTIR), análisis termogravimétrico (TGA) y microscopía electrónica de barrido (SEM). Las áreas
específicas, los espectros infrarrojos y los termogramas evidencian la incorporación de los polímeros
en el material de partida sugiriendo adsorción física de los poliésteres polioles en la matriz
mesoporosa. Las interacciones no covalentes, tipo puente de hidrógeno, entre los componentes
orgánicos e inorgánicos favorecerían esta adsorción. El polímero de menor tamaño, Boltorn®H20, se
incorpora en mayor proporción.
In the present work mesoporous material SBA-15 was synthesized and modified by physisorption with the hyperbranched polymers Boltorn®H20, Boltorn®H30 and Boltorn®H40. The samples were characterized by specific surface area determination (BET), infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and scanning electron microscope (SEM). The specific surface areas, infrared spectra and TGA thermograms of the hybrid materials show changes with respect to the starting materials. The observed modifications suggest the inclusion and physical adsorption of the polyester polyols into the mesoporous matrix. This adsorption would be favored by non-covalent interactions, particularly hydrogen bonding, between the organic and inorganic components. The smaller polymer, Boltorn®H20, was incorporated in a greater proportion.
In the present work mesoporous material SBA-15 was synthesized and modified by physisorption with the hyperbranched polymers Boltorn®H20, Boltorn®H30 and Boltorn®H40. The samples were characterized by specific surface area determination (BET), infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and scanning electron microscope (SEM). The specific surface areas, infrared spectra and TGA thermograms of the hybrid materials show changes with respect to the starting materials. The observed modifications suggest the inclusion and physical adsorption of the polyester polyols into the mesoporous matrix. This adsorption would be favored by non-covalent interactions, particularly hydrogen bonding, between the organic and inorganic components. The smaller polymer, Boltorn®H20, was incorporated in a greater proportion.
Description
Keywords
SBA-15, Poliésteres polioles hiperramificados, Fisisorción
Citation
XX Congreso Argentino de Catálisis (2017).
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