Silica hybrid nanocomposites

• Authors: Georgi Chernev , Bisserka Samuneva , Petar Djambaski , Isabel Salvado , Helena Fernandes
• Languages of publication: EN

Abstracts

EN

In this work we present experimental results about the formation, properties and structure of sol - gel silica based biocomposite containing Calcium alginate as an organic compound. Two different types of silicon precursors have been used in the synthesis: tetramethylortosilicate (TMOS) and ethyltrimethoxysilane (ETMS). The samples have been prepared at room temperature. The hybrids have been synthesized by replacing different quantitis of the inorganic precursor with alginate. The structure of the obtained hybrid materials has been studied by XRD, IR Spectroscopy, EDS, BET and AFM. The results proved that all samples are amorphous possessing a surface area from 70 to 290 m2/g. It has also been established by FT IR spectra that the hybrids containing TMOS display Van der Walls and Hydrogen bonding or electrostatic interactions between the organic and inorganic components. Strong chemical bonds between the inorganic and organic components in the samples with ETMS are present. A self-organized nanostructure has been observed by AFM. In the obtained hybrids the nanobuilding blocks average in size at about 8–14 nm for the particles.

Keywords

EN

Sol gel; silica hybrid nanocomposite; self-organizing

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2006
• Volume: 4
• Issue: 1
• Pages: 81-91

Dates

published

1 - 3 - 2006

online

1 - 3 - 2006

Contributors

author

Georgi Chernev

• Department of Silicate Technology, University of Chemical Technology and Metallurgy, Sofia, Bulgaria

author

Bisserka Samuneva

• Department of Silicate Technology, University of Chemical Technology and Metallurgy, Sofia, Bulgaria

author

Petar Djambaski

• Department of Silicate Technology, University of Chemical Technology and Metallurgy, Sofia, Bulgaria

author

Isabel Salvado

• Department of Ceremics and Glass Engineering, CICECO, University of Aveiro, Aveiro, Portugal

author

Helena Fernandes

• Department of Ceremics and Glass Engineering, CICECO, University of Aveiro, Aveiro, Portugal

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Identifiers

DOI

10.1007/s11532-005-0006-9