Design of halochromic cellulosic materials and smart textiles for continuous wearable optical monitoring of epidermal pH.

ABSTRACT: The direct on-body monitoring of sweat pH and skin pH can provide vanguard information about a person's health status and overall fitness or wellbeing. Sweat pH in particular is a readily accessible biomarker that may be determined with low-cost, non-invasive epidermal patches. With this in mind, we have created a diverse set of wearable halochromic materials, suitable for real-time and reversible monitoring of epidermal pH. A range of cellulosic materials in the form of nanocrystals, microcellulose particles, transparent cellulose films and paper were covalently functionalised with a 2-hydroxyethylsulfonyl azo pH indicator dye by vinylsulfonyl conjugation. Comparative analysis of the photo-physical and analytical properties was performed, and the apparent acid-base equilibrium constants -

SUBMITTER: Mohr GJ 

PROVIDER: S-EPMC12137401 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature