Nanoporous Sheets and Cylinders via Bulk Templating of Triblock Terpolymer/Homopolymer Blends

Titelangaben

Betthausen, Eva ; Dulle, Martin ; Hanske, Christoph ; Müller, Melanie ; Fery, Andreas ; Förster, Stephan ; Schacher, Felix H. ; Müller, Axel H. E.:
Nanoporous Sheets and Cylinders via Bulk Templating of Triblock Terpolymer/Homopolymer Blends.
In: Macromolecules. Bd. 47 (2014) Heft 18 . - S. 6289-6301.
ISSN 1520-5835
DOI: https://doi.org/10.1021/ma501003z

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Abstract

The selective cross-linking of individual do- mains in block copolymer bulk morphologies represents an elegant strategy to generate nanostructured materials of tunable size and geometry. We demonstrate the preparation of highly periodic nanoporous sheets and core−shell cylinders from a stimuli-responsive triblock terpolymer, polybutadiene-block-poly(tert-butyl methacrylate)-block-poly(2-(dimethyl- amino)ethyl methacrylate) (PB-b-PtBMA-b-PDMAEMA). By blending the terpolymer with different types and amounts of homopolymers, a variety of bulk morphologies is accessible, including rarely found examples such as tetragonally perforated lamellae and double gyroid networks. Selective cross-linking of the PB domains of the generated morphologies followed by sonication-assisted dispersion allows the preparation of well-defined nanostructures in nonselective solvents. Because of the PDMAEMA corona, the cross-linked structures are soluble in aqueous media. The high regularity of the pore diameter in combination with a tunable pore permeability by two external stimuli, pH and temperature, renders such perforated lamellae particularly appealing for potential applications as membrane materials.