Nanoporous Thermosets with Percolating Pores from Block Polymers Chemically Fixed above the Order–Disorder Transition,ACS Central Science

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Nanoporous Thermosets with Percolating Pores from Block Polymers Chemically Fixed above the Order–Disorder Transition
ACS Central Science ( IF 12.7 ) Pub Date : 2017-10-04 00:00:00 , DOI: 10.1021/acscentsci.7b00358
Thomas Vidil ₁ , Nicholas Hampu ₂ , Marc A Hillmyer ₁

Affiliation

A lamellar diblock polymer combining a cross-linkable segment with a chemically etchable segment was cross-linked above its order–disorder temperature (T_ODT) 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.

中文翻译：

具有来自化学固定在有序-无序转变之上的嵌段聚合物的渗透孔的纳米多孔热固性材料

将可交联链段与可化学蚀刻链段相结合的层状二嵌段聚合物在其有序无序温度 ( T _ODT ) 以上进行交联，以动力学捕获与波动无序状态相关的形态。去除可蚀刻块后，对所得多孔热固性材料的评估可以对捕获的无序相进行前所未有的实验表征。通过小角 X 射线散射、氮吸附、扫描电子显微镜和电子断层扫描实验的结合，我们证明纳米多孔结构具有窄的孔径分布和高的表面积与体积比，并且在大样品面积上是双连续的。与聚合物原材料的可加工性一起，所提出的系统结合了许多先进应用的有吸引力的属性。特别是，它被用来设计用于水超滤的新型复合膜。

更新日期：2017-10-04

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