Construction of Flexible Antifreeze Conductive Gel
In order to solve the problem that traditional hydrogel materials freeze at low temperature,which leads to the loss of mechanical functions,this study made glycerol system nanocellulose and α-lipoic acid hydrogen bond,and then used FeCl3 as crosslinking agent to further induce the polymerization of lipoic acid to form a gel network,and constructed a flexible antifreeze conductive gel(CNC/α-lipoic acid gel).The gel has excellent mechanical properties,electrical conductivity and sensitive strain sensing properties.The tensile and antifreeze results of CNC/α-alpha-sulfuric acid gel show that when the content of nanocellulose in glycerol system is 1.5 g,the tensile fracture stress of the gel reaches 16 kPa,the elongation at break is 805.5%,and the conductivity remains at 0.029 S/m at the low temperature of-40 ℃,indicating good antifreeze conductivity.The strain sensing performance shows that the gel has a sensitive strain sensing ability.When the strain is 150%~200%,the sensitivity coefficient(GF)of the gel reaches 2.36,which can be used for human movement monitoring,indicating that CNC/α-lipoic acid gel can be used as flexible strain sensor for smart wearable devices.