Poly(N-isopropyl-acrylamide) (PNIPAM) is thermoresponsive in solution or as a component of an ultrathin graft.  In solution these lower critical solution temperature (LCST) phase changes that are monitored using a digital melting point ap-paratus.  At surfaces, hydrophobicity changes parallel this LCST behavior.  Our work has focused on homo- and copolymers of N-isopropylacrylamide prepared as nanocomposites using aminated nanoparticle crosslinkers. Such ssemblies can be prepared conformally by a covalent layer-by-layer process and have responsive wettability � wettability that can be modified solutes or temperature. Such grafts are wet by water or by aqueous solutions of chaotropic salts.  However, solutions of a kosmotropic salt do not wet these grafts whether they were assembled on flat or topographically complex surfaces.  Gglass frits so functionalized exhibit salt responsive passive permeability differences toward different solutes.

Responsive poly(<i>N</i>-isopropylacrylamide) copolymer assemblies

243rd National Meeting (2012)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Responsive poly(N-isopropylacrylamide) copolymer assemblies