Thermo-mechanical properties of mixed-matrix membranes encompassing zeolitic imidazolate framework-90 and polyvinylidine difluoride: ZIF-90/PVDF nanocomposites
Thermo-mechanical properties of mixed-matrix membranes encompassing zeolitic imidazolate framework-90 and polyvinylidine difluoride: ZIF-90/PVDF nanocomposites
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DOI：
10.1063/1.4986565
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发表时间：
2017-08-01
期刊：
影响因子：
6.1
通讯作者：
Tan, Jin-Chong
中科院分区：
文献类型：
--
作者：
Flyagina, Irina S.;Mahdi, E. M.;Tan, Jin-Chong
混合基质膜是现代纳米复合材料，具有许多潜在的应用，从液体和气体分离到化学传感器和生物医学。我们报道了一种基于金属有机框架（MOF）的纳米复合材料的制备，结合了聚偏二氟乙烯（PVDF）聚合物作为基体和ZIF-90纳米晶体，填料含量高达30 wt.%。重点是建立工艺-显微组织-力学性能的关系。我们揭示了量化填料含量显著影响的重要性：(i)拉伸强度下降超过10 wt.%, （ii）由于膜脆化，机械韧性下降。这些是至关重要的力学方面，但在新兴的MOF膜和复合材料领域被广泛忽视。(C) 2017作者：
Mixed-matrix membranes are contemporary nanocomposite materials with many potential applications, from liquid and gas separations to chemical sensors and biomedicine. We report fabrication of a metal-organic framework (MOF)-based nanocomposite, combining polyvinylidene difluoride (PVDF) polymer as the matrix and ZIF-90 nanocrystals of up to 30 wt.% filler content. The focus is to establish the processing-microstructure-mechanical property relationships. We reveal the importance for quantifying salient effects of the filler contents: (i) tensile strength degrades beyond 10 wt.% and (ii) mechanical toughness declines due to membrane embrittlement. These are vital mechanical aspects but widely overlooked in the emergent field of MOF membranes and composites. (C) 2017 Author(s).