Thermal pretreatment of silica composite filler materials

Autor:	Christopher Ramsey, George R. Baran, Quan Wan
Rok vydání:	2009
Předmět:	Materials science Scanning electron microscope Composite number Mineralogy Condensed Matter Physics Article Thermogravimetry Silanol chemistry.chemical_compound Chemical engineering chemistry Gas pycnometer Silanization Boiling Physical and Theoretical Chemistry Thermal analysis
Zdroj:	Journal of Thermal Analysis and Calorimetry. 99:237-243
ISSN:	1572-8943 1388-6150
DOI:	10.1007/s10973-009-0139-8
Popis:	Three different silica filler materials were thermally treated in order to effect dehydration, dehydroxylation, and rehydroxylation. Samples were characterized by thermogravimetry (TG), pycnometry, elemental analysis, and scanning electron microscopy (SEM). For all fillers, our results indicate incremental removal of silanol groups at higher heating temperatures and irreversible dehydroxylation at over 673 K. To remove the organic content and maintain adequate silanol density for subsequent silanization on Stöber-type silica, we suggest heating at 673 K followed by overnight boiling in water.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::248a20d93d70e8785cc5a90a7981ca96 https://doi.org/10.1007/s10973-009-0139-8 Zobrazit plný text záznamu Full text from SpringerLink