気相流通法によるシリカゲルの1-ペンタノール処理

概要

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Silica gel was surface-treated with 1-pentanol at various conditions through gaseous flow method, and the process of treatment was studied by detection of vapor at the end of reaction tube through quadrupole mass spectrometer. The surface property of treated silica gel was inspected by the number of suface group, surface area, dispersive property and infrared spectrum. Results indicate that the appropriate temperature was found to be 350 to 400°C, and a similar result was obtained from the change in ionic current of mass spectra. The pyrolysis of surface-treated silica gel proceeds as same as that of silica gel treated in autoclave. After removing the surface group by heat treatment, both adsorbed amount of argon and surface area were found to be same as those of original silica gel. Therefore, the silica gel substance was thought to be not affected by this treatment. From these results it was recognized that the gaseous flow method was available for the surface treatment as well as the autoclave method.
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