کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
231991 1427449 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adsorption and thermal release of highly volatile compounds in silica aerogels
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Adsorption and thermal release of highly volatile compounds in silica aerogels
چکیده انگلیسی

This work reports the adsorption/desorption behaviour of two highly volatile compounds (1-menthol and 2-methoxy pyrazine) in hydrophobic and hydrophilic silica aerogels where CO2 is used as an effective solvent to deliver these compounds to the inner surfaces of the aerogels. The thermal desorption behaviour of both substances depends intimately on the strength of the interactions of the absorbed substance with the type and availability of hydrophobic and hydrophilic surface groups in each aerogel. For example, as much as ∼50 wt% of either compound remains absorbed on the hydrophilic aerogel surface at temperatures of ∼250–300 °C, whereas these same compounds are released from the hydrophobic aerogel at 100–150 °C lower temperatures. The results reported here provide insight into the application of silica gels as delivery/storage devices with potential applications in the food, drug, flavors, and other allied industries.

This work reports the adsorption/desorption behaviour of two highly volatile compounds in hydrophobic and hydrophilic silica aerogels where CO2 is used as an effective solvent to deliver these compounds to the inner surfaces of the aerogels. The results reported here provide insight into the application of silica gels as delivery/storage devices with potential applications in the food, drug, flavors, and other allied industries.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 48, Issue 1, February 2009, Pages 85–92
نویسندگان
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