Nanoporous Thermosets with Percolating Pores from Block Polymers Chemically Fixed above the Order-Disorder Transition

ACS Central Science
Thomas VidilMarc A Hillmyer

Abstract

A lamellar diblock polymer combining a cross-linkable segment with a chemically etchable segment was cross-linked above its order-disorder temperature (TODT) to kinetically trap the morphology associated with the fluctuating disordered state. After removal of the etchable block, evaluation of the resulting porous thermoset allows for an unprecedented experimental characterization of the trapped disordered phase. Through a combination of small-angle X-ray scattering, nitrogen sorption, scanning electron microscopy, and electron tomography experiments we demonstrate that the nanoporous structure exhibits a narrow pore size distribution and a high surface to volume ratio and is bicontinuous over a large sample area. Together with the processability of the polymeric starting material, the proposed system combines attractive attributes for many advanced applications. In particular, it was used to design new composite membranes for the ultrafiltration of water.

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Feb 25, 2009·ACS Applied Materials & Interfaces·William A PhillipEdward L Cussler
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Citations

Oct 9, 2018·Physical Review Letters·Mridul YadavDavid C Morse
Mar 7, 2020·Proceedings of the National Academy of Sciences of the United States of America·Carlos M PortelaDennis M Kochmann
Apr 24, 2021·Chemical Society Reviews·Leiming GuoMartin Steinhart
May 12, 2020·Journal of the American Chemical Society·Zhengyuan ShenJ Ilja Siepmann
Sep 29, 2020·ACS Applied Materials & Interfaces·Nicholas HampuMarc A Hillmyer

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Methods Mentioned

BETA
differential scanning calorimetry
small-angle scattering

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