Surprising conversion of nanocomposite hydrogels with high mechanical strength by posttreatment: From a low swelling ratio to an ultrahigh swelling ratio (pages 6640–6645)
Wei Zhang, Yang Liu, Meifang Zhu, Yu Zhang, Xiaoli Liu, Hao Yu, Yongmei Jiang, Yanmo Chen, Dirk Kuckling and Hans-Juergen P. Adler
Version of Record online: 12 OCT 2006 | DOI: 10.1002/pola.21749
A series of Laponite XLS/polyacrylamide nanocomposite hydrogels (S–M gels) have been successfully prepared by in situ polymerization. It has been discovered for the first time that the properties of nanocomposite gels can be modulated by posttreatment; the swelling ratio of the S–M gels increases greatly with heat posttreatment, up to several hundreds times (water/solid) or higher, much more than that of any other reported nanocomposite gels. The improvement is due to the physical structure changes of the S–M gels. Moreover, S–M–T gels (S–M gels after post-treatment) with an ultrahigh swelling ratio still show excellent resilience under pressure, and they can be regarded as novel elastic superabsorbents.