The invention discloses an antibacterial-waterproof hydrogel
biosensor based on a conductive spandex
fiber net and a preparation method of the antibacterial-waterproof hydrogel
biosensor. The preparation method comprises the following steps: (1) preparing
graphene composite elastic spandex conductive fibers by adopting a solution dry
spinning method, and weaving the
graphene composite elastic spandex conductive fibers into a
fiber net; (2) designing a cuboid-shaped mold, and fixing a
fiber net on hooks on four edges in a mold groove to serve as a first layer of conductive fiber net structure; (3) preparing a
sodium alginate /
acrylamide mixed solution blended with nano-silver, and pouring the
sodium alginate /
acrylamide mixed solution into a mold for in-situ
polymerization; 4) transferring the mold into a Ca < 2 + > coagulating bath to form a second layer of
gel matrix structure with double networks; and 5) after the gel is completely dialyzed, dipping the gel in a
stearic acid / organic
silicon emulsion /
vegetable oil mixed solution for hydrophobic modification so as to form a third waterproof layer structure on the surface of the gel, and finally obtaining the hydrogel
biosensor. The biosensor has conductive, stretchable, antibacterial and waterproof functions and the like, and can be applied to biological
strain monitoring.