Surface Functionalization of Cotton Fabrics by Photo-Grafting for pH Sensing Applications

Parnian Kianfar; Molla Tadesse Abate; Valentina Trovato; Giuseppe Rosace; Ada Ferri; Roberta Bongiovanni; Alessandra Vitale

doi:10.3389/fmats.2020.00039

Frontiers in Materials (Feb 2020)

Surface Functionalization of Cotton Fabrics by Photo-Grafting for pH Sensing Applications

Parnian Kianfar,
Molla Tadesse Abate,
Valentina Trovato,
Giuseppe Rosace,
Ada Ferri,
Roberta Bongiovanni,
Alessandra Vitale

Affiliations

Parnian Kianfar: Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
Molla Tadesse Abate: Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
Valentina Trovato: Department of Engineering and Applied Sciences, University of Bergamo, Bergamo, Italy
Giuseppe Rosace: Department of Engineering and Applied Sciences, University of Bergamo, Bergamo, Italy
Ada Ferri: Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
Roberta Bongiovanni: Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
Alessandra Vitale: Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy

DOI: https://doi.org/10.3389/fmats.2020.00039
Journal volume & issue: Vol. 7

Abstract

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This paper investigates the photo-grafting of a halochromic molecule on cotton fabric surfaces. Nitrazine yellow (NY) dye was modified with a methacrylate moiety (GMA) obtaining a photo-reactive dye (GMA-NY), which was covalently grafted onto the cellulosic substrate by means of UV irradiation. The photo-grafting reaction was studied by FT-IR spectroscopy, while the pH response of the functionalized fabric was evaluated at different pH conditions (i.e., acidic and alkaline conditions) both in wet and vapor environments by spectrophotometric analyses. The results showed that the photo-grafting of the modified dye onto the fabric was successful: treated cotton clearly changed color when subjected to different pH. It was thus demonstrated that the GMA-NY dye, photo-grafted on cotton, can successfully impart pH sensing properties to the fabric, which can therefore find numerous applications in the area of smart textiles.

Published in Frontiers in Materials

ISSN: 2296-8016 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Technology
Website: https://www.frontiersin.org/journals/materials

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