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A new elemental analysis method based on thermogravimetric data and applied to alkoxysilane immobilized on silicas

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Abstract

A new analytical method based on thermogravimetry and applied to chemically functionalized surfaces is proposed. The mass losses of surfaces modified with alkoxysilane reagents, Sup-CH2CH2CH2−R (Sup=support andR=Cl, SH, NH2, NHCONH2, NHNHCOCH3 or (CH2)4NH), are interpreted by considering the physically adsorbed water, the silanol groups and the organic moiety. The elemental analyses calculated from these data are in agreement with those obtained by classical elemental analysis. The method is quick and reproducible, and requires the use of only a few milligrams of material.

Zusammenfassung

Es wird eine neue, auf der Thermogravimetrie basierende und an chemisch funktionierten Oberflächen angewendete analytische Methode vorgeschlagen. Unter Inbetrachtnahme physisch adsorbierten Wassers, der Silanolgruppen und der organischen Anteile wurde der Massenverlust von Oberflächen interpretiert, die mit den Alkoxysilanreagenzien Sup-CH2CH2CH2−R (Sup=Träger,R=Cl, SH, NH2, NHCONH2, NHNHCOCH3 oder (CH2)4NH) modifiziert wurden. Die anhand dieser Angaben berechneten Elementaranalysen stehen in Übereinstimmung mit denen aus klassischer Elementaranalyse. Die Methode ist schnell und reproduzierbar durchführbar und bedarf nur einiger Milligramm der fraglichen Substanz.

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Authors and Affiliations

  1. Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13083-970, Campinas, Sao Paulo, Brazil

    A. R. Cestari & C. Airoldi

Authors
  1. A. R. Cestari
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  2. C. Airoldi
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Cestari, A.R., Airoldi, C. A new elemental analysis method based on thermogravimetric data and applied to alkoxysilane immobilized on silicas. Journal of Thermal Analysis 44, 79–87 (1995). https://doi.org/10.1007/BF02547136

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  • DOI: https://doi.org/10.1007/BF02547136

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