| abstract |
A hydrogel comprising a polyanionic polysaccharide derivative having a hydrophobic group covalently introduced and a salt solution having a salt concentration of 50 mM or more and 200 mM or less, and having an aggregate structure with an average particle size of 100 to 2000 nm in the diluted solution A process for preparing a hydrogel, a mixture comprising a polyanionic polysaccharide derivative having a hydrophobic group introduced therein and a salt solution of 50 mM or more and 200 mM or less, and a method for producing the hydrogel, comprising a step of heat-treating the mixture. The hydrogel of the present invention has long-term stability and can be filtered using a porous filter having a pore size of 5 μm or more. |