Preparation and Sensing Applications of PAMgA/GL Conductive Hydrogels with Antifreezing, High Toughness and High Adhesion

In this paper, magnesium acrylate (AMgA) was used as the polymerization monomer, glycerol (GL) was used as the modifier, ammonium persulfate (APS) and triethanolamine (TEA) were selected as the redox initiation system to prepare polymagnesium acrylate/glycerol (PAMgA/GL) supramolecular conductive hydrogels by free radical polymerization. The antifreezing property, water retention, tensile properties, adhesion, self-healing property, conductivity and strain sensing properties of the hydrogels were analyzed. The results revealed that: when the GL content was 30 wt %, the PAMgA/GL hydrogels exhibited excellent toughness, the tensile strength was 0.152 MPa, and the elongation at break can reach 534%, the conductivity was 0.277 S m^–1, and the four times adhesion strength to 0.0407 MPa. When the tensile strain reached 500%, the gauge factor (GF) was 2.45, exhibiting great strain sensing properties. In addition, the PAMgA/GL hydrogels demonstrated good antifreezing property, water-retention and self-healing properties. The results of this study provide theoretical guidance for the design and preparation of new materials for human body detection.