Journal of Sol-Gel Science and Technology
REVIEW PAPER: SOL-GEL AND HYBRID MATERIALS WITH SURFACE MODIFICATION
The key role of 3-glycidoxypropyltrimethoxysilane sol–gel precursor
in the development of wearable sensors for health monitoring
Maria Rosaria Plutino
Received: 16 March 2018 / Accepted: 16 May 2018
© Springer Science+Business Media, LLC, part of Springer Nature 2018
Textiles represent an attractive class of materials for realizing wearable biosensors. Electronic textiles, or smart textiles, describe
the convergence of electronics and textiles into fabrics, which are able to sense, compute, communicate, and actuate. As many
different electronic systems can be connected to any clothing, a wearable system becomes more versatile, and the user can change
its look depending on environmental changes and individual preference. In this review, we want to explain how it is possible to
develop the sensing component of a wearable sensor by sol–gel method based on the use of opportune organofunctional
trialkoxysilane precursors, such as 3-glycidoxypropyltrimethoxysilane. Results show that the halochromic dyestuffs are
completely entrapped in the sol–gel coatings, both through chemical and physical interactions with the textile fabric. Moreover, a
certain washing fastness was observed. Sensor ﬁlms show excellent reproducibility, reversibility, and short response times, with
dynamic ranges from pH 4.4–6.0 (Methyl Red), pH 6.0–7.0 (Nitrazine Yellow), and pH 4.5–8.3 (Litmus), respectively.
Functional textile coatings containing embedded dyestuff were synthesized by sol–gel method.
3-Glycidoxypropyltrimethoxysilane (GPTMS) is a useful organofunctional trialkoxysilane precursor for the development
of wearable sensors.
pH sensing ﬁlms based on GPTMS-dye have been developed and studied.
Textile chemical modiﬁcation
* Maria Rosaria Plutino
Department of Engineering and Applied Sciences, University of
Bergamo, Viale Marconi 5, 24044 Dalmine, BG, Italy
Institute for the Study of Nanostructured Materials, ISMN
(Palermo), CNR, Viale F. D’Alcontres 31 (c/o Di. ChiBioFarAm,
Univ. of Messina)- Vill.S. Agata, 98166 Messina, Italy