Abstract:

With polyvinyl alcohol (PVA) and acrylamide (AM) as raw material, PVA/PAM hybrid doublenetwork hydrogel was synthesized by onepot twostep polymerization method combined UV irradiation and freezingthawing technology. We tested and analyzed the mechanical property, swelling property, water loss property and selfhealing property of hydrogels. The results show that PVA/PAM hybrid doublenetwork hydrogel has high mechanical strength, its tensile strength is 428 kPa, the water loss rate is slower than the single network hydrogel. The hybrid doublenetwork hydrogel possesses selfhealing property.

Key words: polyvinyl alcohol (PVA), acrylamide (AM), irradiation, freezingthawing, hydrogel, mechanical property, selfhealing