Preparation of tough and anti-freezing hybrid double-network carboxymethyl chitosan/poly(acrylic amide) hydrogel and its application for flexible strain sensor
Source abstract
Abstract
In this paper, we fabricated a tough, anti-freezing (freezing point of − 25.5 °C) and ionic conductive carboxymethyl chitosan (CMCS)-based double-network (DN) hydrogel by a free radical polymerization and Al3+ coordination. In greater detail, the PAM/CMCS-Al3+ hydrogel was composed of Al3+-coordinated CMCS network and covalently crosslinked PAM network. The hybrid DN structure of PAM/CMCS-Al3+ hydrogel gave rise to high mechanical properties (tensile strength up to 2.15 MPa, elongation at break up to 1741%, toughness of 13.2 MJ/m3 and elastic modulus of 1.43 MPa) and good fatigue resistance. PAM/CMCS-Al3+ hydrogel not only exhibited the capacity to conduct electricity via free ions, but also had good strain sensitivity (GF = 2.09, 0–200% strain and fast response time of 234 ms). Based on the high strain sensitivity, PAM/CMCS-Al3+ hydrogel could be used to assemble a flexible strain sensor with the ability to precisely detect human motions.Kindly check and confirm the edit made in the title.We agree with the edit made in the title.
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Research context
OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Conducting polymers and applications · Polydiacetylene-based materials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
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