Mussel-inspired PDA@PEDOT nanocomposite hydrogel with excellent mechanical strength, self-adhesive, and self-healing properties for a flexible strain sensor

Abstract

Conductive hydrogel sensors have attracted attention for use in human motion monitoring detection, but integrating excellent biocompatibility, mechanical, self-adhesive, and self-healing properties, and high sensitivity into a hydrogel remains a challenge.

A flexible, stretchable and wearable strain sensor based on physical eutectogels for deep learning-assisted motion identification

“…9,10 Although great progress has been witnessed in conductive gel development, synergistically integrating diverse functionalities such as high conductivity, exceptional mechanical performance, prominent self-adhesiveness, and selfhealing capability into a single conductive gel remains a challenge for practical use. [11][12][13][14][15] Eutectogels, novel conductive gels composed of polymer networks and deep eutectic solvents (DES), have attracted extensive attention in the gel family and have been widely applied in wearable devices, 16 ionic conductors, 17 drug delivery, 18 and energy storage 19 fields in recent years. 20 As a crucial component in eutectogels, DES is regarded as an ionic liquid analog and is made by mixing hydrogen bond donors (HBDs, eg., acids, alcohols, and urea) and hydrogen bond acceptors (HBAs, eg., choline chloride).…”

“…9,10 Although great progress has been witnessed in conductive gel development, synergistically integrating diverse functionalities such as high conductivity, exceptional mechanical performance, prominent self-adhesiveness, and self-healing capability into a single conductive gel remains a challenge for practical use. 11–15…”