Hydrorepellent finishing of cotton fabrics by chemically modified TEOS based nanosol

Hydrorepellency was conferred to cotton fabrics by an hybrid organic-inorganic finishing via sol-gel. The nanosol was prepared by co-hydrolysis and condensation of tetraethoxysilane (TEOS) and 1H,1H,2H,2H-fluorooctyltriethoxysilane (FOS), or hexadecyltrimethoxysilane (C 16 ), as precursors in weakly...

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Bibliographic Details
Published in:Cellulose (London) 2013-02, Vol.20 (1), p.355-364
Main Authors: Periolatto, Monica, Ferrero, Franco, Montarsolo, Alessio, Mossotti, Raffaella
Format: Article
Language:English
Subjects:
Bioorganic Chemistry
Ceramics
Chemistry
Composites
Contact angle
Cotton
Cotton fabrics
Fabrics
Glass
Heat treatment
Hydrophobicity
Impregnation
Natural Materials
Organic Chemistry
Original Paper
Physical Chemistry
Polymer Sciences
Sol-gel processes
Sustainable Development
Tetraethyl orthosilicate
Ultrasonic testing
Washing
X ray photoelectron spectroscopy
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Summary:Hydrorepellency was conferred to cotton fabrics by an hybrid organic-inorganic finishing via sol-gel. The nanosol was prepared by co-hydrolysis and condensation of tetraethoxysilane (TEOS) and 1H,1H,2H,2H-fluorooctyltriethoxysilane (FOS), or hexadecyltrimethoxysilane (C 16 ), as precursors in weakly acid medium. The application on cotton was carried out by padding with various impregnation times, followed by drying and thermal treatment, varying the FOS add-on from 5 till 30 % on fabric weight or C 16 add-on from 5 to 10 %. Treated samples were tested in terms of contact angles, drop absorption times, washing fastness and characterized by SEM, XPS and FTIR-ATR analyses. In the case of FOS modified nanosol applied with an impregnation time of 24 h or C 16 modified nanosol, water contact angles values very close or even higher than 150° were measured, typical of a superhydrophobic surface. The application of the proposed sol-gel process yielded also a satisfactory treatment fastness to domestic washing, in particular for FOS modified nanosol.
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-012-9821-2