Ultra-strong thermoresponsive double network hydrogels.

ABSTRACT: Thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm) hydrogels are widely studied smart materials, particularly for biomedical applications, but are limited by their mechanical strength. In this study, double network (DN) hydrogels were prepared with an asymmetric crosslink design and inclusion of an electrostatic co-monomer, 2-acrylamido-2-methylpropane sulfonic acid (AMPS). These P(NIPAAm-co-AMPS)/PNIPAAm DN hydrogels were sequentially formed with a tightly crosslinked 1^st network comprised of variable levels of AMPS (100 : 0 to 25 : 75 wt% ratio of NIPAAm:AMPS) and a loosely crosslinked 2^nd network comprised of PNIPAAm. The impact of AMPS content in the 1^st network on the volume phase transition temperature (VPTT), morphology, deswelling-

SUBMITTER: Fei R 

PROVIDER: S-EPMC7740108 | biostudies-literature | 2013 Mar

REPOSITORIES: biostudies-literature