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- W3196820512 abstract "We describe a straightforward self-assembly route to nanoporous materials derived from a hexagonally-packed cylinder (HEX) morphology of a polyisoprene-block-polylactide (PI-b-PLA) diblock copolymer, by thermal cross-linking of the minority PI domains followed by selective chemical etching of the PLA matrix. The resulting mechanically stable and porous samples defy the expectation that the remaining cylinders cannot yield a robust, integrated material upon matrix removal. Scanning electron microscopy imaging reveals that this unexpected structural integrity stems from the interconnected nanofibrils therein, reflecting topological defects at the grain boundaries of the parent polydomain HEX nanostructure. Hydrodynamic radius-dependent poly(ethylene oxide) (Mn = 0.4–35 kg/mol) permeation behavior through these monoliths directly demonstrated the continuity and size selectivity of the nanoporous material. The ready accessibility of block copolymer HEX morphologies of varied chemistries suggests that this matrix etching strategy will enable the future design of functional, size-selective nanofiltration membrane materials." @default.
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- W3196820512 date "2021-08-30" @default.
- W3196820512 modified "2023-10-14" @default.
- W3196820512 title "Flexible Nanoporous Materials by Matrix Removal from Cylinder-Forming Diblock Copolymers" @default.
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- W3196820512 doi "https://doi.org/10.1021/acs.nanolett.1c02097" @default.
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