[Polym. Chem.] Ultrathin free-standing polymer membranes with chemically responsive luminescence via consecutive photopolymerizations
作者：H. Bian, J. Yang, N. Zhang,* Q. Wang, Y. Liang, D. Dong,*
關鍵字：free-standing polymer membranes, responsive, surface-initiated polymerization
論文來源：期刊
具體來源：Polymer Chemistry
發(fā)表時間：2016年
A facile and general method for the preparation of chemically responsive
polymer films is demonstrated. First, a crosslinked polymer precoating
layer is created via self-initiated photografting and
photopolymerization of ethylene glycol dimethacrylate on a
self-assembled monolayer of a 3-(trimethoxysilyl)propylamine modified
oxidized silicon wafer. The intact methacrylate functionalities are used
to grow polymer chains by a second self-initiated photografting and
photopolymerization of vinyl monomers to form polymer brushes on the
crosslinked layer; thus a series of polymer membranes of PMMA, PDMAEMA
and P4VP are obtained. The double-layered polymer membranes can be
lifted off via hydrofluoric acid etching of the oxidized
silicon layer to give integral free-standing polymer membranes. Kinetic
studies revealed that the thickness of both the crosslinked precoating
layer and the brush layer increased linearly as a function of the
polymerization time before the reaction solutions got highly viscous.
Furthermore, polyoxometalate Na9(EuW10O36)
can be uniformly incorporated into the PDMAEMA membrane through
electrostatic interactions to afford an acid/base gas-responsive
luminescent hybrid film.