Tuning the morphology of segmented block copolymers with Zr-MOF nanoparticles for durable and efficient hydrocarbon separation membranes
Tuning the morphology of segmented block copolymers with Zr-MOF nanoparticles for durable and efficient hydrocarbon separation membranes
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DOI：
10.1039/d0ta02587a
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发表时间：
2020-05
影响因子：
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通讯作者：
Ali Pournaghshband Isfahani;M. Sadeghi;Somaye Nilouyal;Guoji Huang;A. Muchtar;Masateru M. Ito;D. Yamaguchi
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文献类型：
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作者：
Ali Pournaghshband Isfahani;M. Sadeghi;Somaye Nilouyal;Guoji Huang;A. Muchtar;Masateru M. Ito;D. Yamaguchi
嵌段共聚物的微相分离是控制力学物理性能的关键参数。锆-金属-有机骨架（MOFs）显示出很高的潜力，为混合基质膜的发展。在这里，UiO 66和胺官能化的UiO 66（UiO 66-NH 2）纳米晶体的聚氨酯（PU）膜的相分离和气体传输性能的影响进行了研究。除了在MOFs上的相当大的气体吸附之外，通过掺入U1 O 66-NH 2颗粒来调节PU的相分离产生了更多的气体分子可接近的吸附位点，并增加了选择性。PU/U1 O 66-NH 2膜具有很高的C4 H10/CH 4选择性（> 70），这远远超出了典型聚合物（例如PDMS、PTMSP等）的分离性能。用于碳氢化合物分离。通过FTIR、DSC和AFM测量验证了相分离的增加。PU/UiO_（66）-NH_2复合材料的力学性能提高了600%以上。此外，麦克斯韦模型可靠地预测膜的传输特性。
Microphase separation of block copolymers is a critical parameter to control the mechanical–physical properties. Zr-Metal–organic frameworks (MOFs) display high potential for the development of mixed matrix membranes. Here, the effect of UiO66 and amine-functionalized UiO66 (UiO66-NH2) nanocrystals on the phase separation and gas transport properties of polyurethane (PU) membranes is investigated. In addition to considerable gas adsorption on MOFs, tuning the phase separation of PU by the incorporation of UiO66-NH2 particles generates more accessible adsorption sites for gas molecules and increases the selectivity. The PU/UiO66-NH2 membrane exhibits high C4H10/CH4 selectivity (∼70), which is far beyond the separation performance of typical polymers (e.g. PDMS, PTMSP, etc.) for hydrocarbon separation. The increase in the phase separation is verified by FTIR, DSC and AFM measurements. C4H10 plasticization of the PU MMMs is significantly suppressed, and the mechanical properties are improved by more than 600% for PU/UiO66-NH2 composites. Additionally, the Maxwell model reliably predicts the transport properties of the membranes.