A Novel CMC/PNIPA/Clay Nanocomposite Hydrogel with Rapid Deswelling Rate and Improved Mechanical Properties

摘要

A new series of sodium carboxymethylcellulose/poly (N-isopropylacrylamide)/clay (CMC/PNIPA/Clay) nanocomposite hydrogels were prepared based on linear CMC and PNIPA using inorganic clay as a multifunctional crosslinker by interpenetrating polymer network (IPN) technique. The structure, deswelling behaviors and mechanical properties of this hydrogel were studied. The results showed that the silicate layers were substantially exfoliated and homogeneously dispersed in the hydrogel, which crosslinked the PNIPA polymer chains, whereas CMC was still existed in the form of linear chains incorporated in the semi-IPN hydrogels. Moreover, the novel hydrogels had much higher deswelling rate and superior mechanical performances by compared with the conventional hydrogels.