Water-retaining gel material and preparation method thereof

The invention provides a water-retaining gel material and belongs to the technical field of gel materials. The gel material comprises a first water-retaining layer, a conducting layer and a second water-retaining layer in sequence, wherein the first water-retaining layer and the second water-retaining layer are polysiloxane elastomers; the conducting layer is prepared from agar, polyvinyl alcohol,acrylic acid, persulfate, N,N-methylenebisacrylamide, inorganic metal salt and water. Acrylic acid in the raw materials of the conducting layer of the water-retaining gel material is subjected to a polymerization reaction under the action of a cross-linking agent N,N-methylenebisacrylamide, and agar, polyvinyl alcohol, polyacrylic acid and metal ions are subjected to a coordinated complexation reaction. By the aid of the three-dimensional network structure, free H and metal ions of the conducting layer, the hydrogel material has pressure sensitivity, self-healing property and conductivity,and water of the gel mate