Gelation behavior of polysaccharide-based interpenetrating polymer network (IPN) hydrogels

摘要: We report the preparation and rheological characterization of interpenetrating polymer network (IPN) hydrogels made from alginate hydrophobically modified ethyl hydroxyl cellulose (HMEHEC). To our knowledge, there have been no studies gelation behavior IPNs. found that rheology these systems can be easily tuned, with elastic modulus IPN strongly dependent on relative ratio HMEHEC to alginate. The sol–gel transition was satisfy Winter–Chambon criterion for at various crosslinker densities. From power law relationship dynamic moduli (G ′ ~G ″ ~ω n), exponent n appears both density amount two polymers. value ~0.5 all samples stoichiometric amounts crosslinker. effect molecular weight gel point viscoelastic has also reported. Alginate seems dominate kinetics process but high point, especially lower proportion evident.