The invention discloses a preparation method of an
aerogel based on a
double network structure design. The method comprises the steps that a
sodium alginate is added by a one-step or two-
step method by
radical polymerization to form a gel solution of a
polyacrylamide chemical cross-linking network interpenetrating
sodium alginate structure, gel is extruded into a coagulation bath to form microspheres or
fiber and other forms, at the same time,
calcium alginate
ion cross-linking is formed through
ion exchange, and finally a double-
network structure hydrogel
interlocking chemical cross-linking and
ion cross-linking is formed. After washing with water and freeze-
drying, finally an
aerogel is obtained. The
aerogel exhibits a microscopic multi-layered pore structure with
large pore nested mesopores and micropores. According to the preparation method of the aerogel based on the
double network structure design, the
sodium alginate and
acrylamide are utilized to prepare the composite aerogel,the application of an aerogel material in actual production is expanded, and moreover theerogel material has outstanding characteristics of economy,
environmental protection,
biocompatibility, degradation and the like compared with other aerogel materials, not only can be processed into microspheres, massive structure, but also can directly be processed into
fiber morphology.