Alizarin-functionalized organic-inorganic silane coatings for the development of wearable textile sensors.
J Colloid Interface Sci
; 617: 463-477, 2022 Jul.
Article
em En
| MEDLINE
| ID: mdl-35290804
ABSTRACT
HYPOTHESIS:
The broad detection properties of alizarin, not only concerning pH variations but also temperature, glucose and health-like relevant cations alterations, make it a molecule of great scientific interest, particularly for developing multifunctional wearable sensors. EXPERIMENT Herein, the alizarin red S dyestuff is bonded with trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane, as a sol-gel precursor, to functionalize cotton fabrics. The chemical and structural properties of both plain and silane-functionalized dyestuffs are investigated in solution and solid-state by several chemical-physical characterization techniques.FINDINGS:
The hybrid dyestuff characterization reveals the epoxy ring-opening of the silica precursor, leading to covalent linkages to the sulfonic group of alizarin, which retains its structure during the sol-gel reaction. The silane-functionalized halochromic dyestuff shows similar halochromic behaviour as its pristine solution in the investigated pH range, thus demonstrating a color shift from yellow to red due to the protonation/deprotonation reversible mechanism of the chromophore. The reversibility and repeatability of pH-sensing properties of treated cotton fabrics are confirmed by diffuse reflectance and CIELAB color space characterizations. Cotton fabric functionalized with alizarin-containing sol-gel coating shows excellent durability of halochromic properties, thus emerging as a versatile platform for stimuli-responsive materials.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Silanos
/
Dispositivos Eletrônicos Vestíveis
Idioma:
En
Revista:
J Colloid Interface Sci
Ano de publicação:
2022
Tipo de documento:
Article