Conductive hydrogel fibers and the fabrication methods thereof

A conductive hydrogel fiber, comprising:

• a hydrogel network, comprising a hydrogel polymer and conductive fillers dispersed therein, wherein the concentration of the conductive fillers ranges from 1% to 5%;
• wherein the hydrogel network has a porous structure having nanofibrils network walls;
• wherein surfaces of the nanofibrillar network walls are provided with interconnected crystallized nanofibrils formed by concentration and aggregation of the hydrogel polymer;
• and
• wherein the conductive hydrogel fiber has an electrical conductivity of 800-1,000 S/cm, a diameter of 1.5-0.3 mm, a tensile strength of 5-10 MPa, an elongation at bread of at least 300%, a toughness of 10-15 MJ/m2, and a swelling rate in water of 8% to 52%.