In view of health and environmental concerns, together with the upcoming restrictive regulations on per- and polyfluoroalkyl substances (PFAS), less impactful materials must be explored for the hydrophobization of surfaces. Polysaccharides, and especially chitosan, are being explored for their desirable properties of film formation and ease of modification. We present a PFAS-free chitosan superhydrophobic coating for textiles deposited through a solvent-free method. By contact angle analysis and drop impact, we observe that the coating imparts hydrophobicity to the fabrics, reaching superhydrophobicty (θA = 151°, θR = 136°) with increased amount of coating (from 1.6 g/cm2). This effect is obtained by the combination of chemical water repellency of the modified chitosan and the nano- and micro-roughness, assessed by SEM analysis. We perform a comprehensive study on the durability of the coatings, showing good results especially for acidic soaking where the hydrophobicity is maintained until the 8th cycle of washing. We assess the degradation of the coating by a TGA-IR investigation to define the compounds released with thermal degradation, and we confirm the coating's biodegradability by biochemical oxygen consumption. Finally, we demonstrate its biocompatibility on keratinocytes (HaCaT cell line) and fibroblasts (HFF-1 cell line), confirming that the coating is safe for human skin cells.

Tagliaro, I., Mariani, M., Akbari, R., Contardi, M., Summa, M., Saliu, F., et al. (2024). PFAS-free superhydrophobic chitosan coating for fabrics. CARBOHYDRATE POLYMERS, 333(1 June 2024), 1-10 [10.1016/j.carbpol.2024.121981].

PFAS-free superhydrophobic chitosan coating for fabrics

Tagliaro, I
;
Akbari, R;Contardi, M;Saliu, F;Nistico', R;Antonini, C
Ultimo
2024

Abstract

In view of health and environmental concerns, together with the upcoming restrictive regulations on per- and polyfluoroalkyl substances (PFAS), less impactful materials must be explored for the hydrophobization of surfaces. Polysaccharides, and especially chitosan, are being explored for their desirable properties of film formation and ease of modification. We present a PFAS-free chitosan superhydrophobic coating for textiles deposited through a solvent-free method. By contact angle analysis and drop impact, we observe that the coating imparts hydrophobicity to the fabrics, reaching superhydrophobicty (θA = 151°, θR = 136°) with increased amount of coating (from 1.6 g/cm2). This effect is obtained by the combination of chemical water repellency of the modified chitosan and the nano- and micro-roughness, assessed by SEM analysis. We perform a comprehensive study on the durability of the coatings, showing good results especially for acidic soaking where the hydrophobicity is maintained until the 8th cycle of washing. We assess the degradation of the coating by a TGA-IR investigation to define the compounds released with thermal degradation, and we confirm the coating's biodegradability by biochemical oxygen consumption. Finally, we demonstrate its biocompatibility on keratinocytes (HaCaT cell line) and fibroblasts (HFF-1 cell line), confirming that the coating is safe for human skin cells.
Articolo in rivista - Articolo scientifico
Chemical modification; Chitosan; Per- and polyfluoroalkyl substances (PFAS); Superhydrophobic; Textile coatings;
English
24-feb-2024
2024
333
1 June 2024
1
10
121981
open
Tagliaro, I., Mariani, M., Akbari, R., Contardi, M., Summa, M., Saliu, F., et al. (2024). PFAS-free superhydrophobic chitosan coating for fabrics. CARBOHYDRATE POLYMERS, 333(1 June 2024), 1-10 [10.1016/j.carbpol.2024.121981].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/462618
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