Sol-gel treatments have been performed on cotton fabrics in order to promote the formation of a surface silica insulating barrier, able to enhance their thermo-oxidative stability and flame retardancy. In particular, the role of several silica precursors, which differ as far as their structure (number and type of hydrolysable groups, presence of aromatic rings) is concerned, has been thoroughly investigated. The level of silica distribution and dispersion on and within the fabrics was found to depend on the type of precursor employed, as revealed by scanning electron microscopy and elemental analysis. All the precursors were able to favour the char formation in air below 360 °C, as stated by thermogravimetric analysis: in particular, the highest thermal stability was achieved in the presence of precursors bearing aromatic rings. Indeed, both flammability resistance and combustion behaviour of the treated fabrics were remarkably enhanced.

Sol-gel treatments on cotton fabrics for improving thermal and flame stability : effect of the structure of the alkoxysilane precursor / J. Alongi, M. Ciobanu, G. Malucelli. - In: CARBOHYDRATE POLYMERS. - ISSN 0144-8617. - 87:1(2012 Jan 04), pp. 627-635. [10.1016/j.carbpol.2011.08.036]

Sol-gel treatments on cotton fabrics for improving thermal and flame stability : effect of the structure of the alkoxysilane precursor

J. Alongi
;
2012

Abstract

Sol-gel treatments have been performed on cotton fabrics in order to promote the formation of a surface silica insulating barrier, able to enhance their thermo-oxidative stability and flame retardancy. In particular, the role of several silica precursors, which differ as far as their structure (number and type of hydrolysable groups, presence of aromatic rings) is concerned, has been thoroughly investigated. The level of silica distribution and dispersion on and within the fabrics was found to depend on the type of precursor employed, as revealed by scanning electron microscopy and elemental analysis. All the precursors were able to favour the char formation in air below 360 °C, as stated by thermogravimetric analysis: in particular, the highest thermal stability was achieved in the presence of precursors bearing aromatic rings. Indeed, both flammability resistance and combustion behaviour of the treated fabrics were remarkably enhanced.
Alkoxysilanes; Combustion behaviour; Cotton; Flame retardancy; Sol-gel processes; Thermal stability; Organic Chemistry; Materials Chemistry; Polymers and Plastics
Settore CHIM/04 - Chimica Industriale
4-gen-2012
22-ago-2011
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/464702
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