Polymer nanocomposites functionalised with nanocrystals of zeolitic imidazolate frameworks as ethylene control agents
Polymer nanocomposites functionalised with nanocrystals of zeolitic imidazolate frameworks as ethylene control agents
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DOI：
10.1016/j.mtadv.2019.100008
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发表时间：
2019-06
影响因子：
10
通讯作者：
E. M. Mahdi;C. Cuadrado-Collados;J. Silvestre-Albero;Jin‐Chong Tan
中科院分区：
文献类型：
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作者：
E. M. Mahdi;C. Cuadrado-Collados;J. Silvestre-Albero;Jin‐Chong Tan
乙烯(C2H4)管理涉及使用KMnO4等材料或臭氧氧化或光催化/光化学组合等过程。C2H4的无处不在，特别是在工业环境中，需要一种更简单和更有效的方法，在这里，我们建议使用可调聚合物纳米复合材料来吸附C2H4，方法是通过引入分子筛咪唑骨架的纳米晶体(Nano-ZIF)对聚合物基质进行改性。我们证明，将ZIF-8和ZIF-7纳米晶包含到聚合物基质(基质和聚氨酯[PU])中，可以产生坚固的纳米复合材料，在保护纳米晶对C2H4的吸附/解吸能力的同时，保护其免受降解因素的影响。我们报道了对聚合物及其相应的纳米复合材料的吸附/解吸动力学的新见解，这些纳米复合材料可以通过利用潜在的聚合物分子相互作用来定制。重要的是，我们还阐明了即使当纳米ZIF嵌入到聚合物基质中时，其内在结构框架动力学的保留，这从呼吸和开门现象中得到了证明。我们的发现为新型聚合物纳米复合材料的定制设计铺平了道路，这将随后影响为有效的工业应用而定制的纳米材料的部署。
Ethylene (C2H4) management involves the usage of materials such as KMnO4or processes such as ozone oxidation or combined photocatalysis/photochemistry. The ubiquity of C2H4, especially in an industrial context, necessitates a simpler and much more effective approach, and herein we propose the usage of tuneable polymer nanocomposites for the adsorption of C2H4through the modification of the polymer matricesviathe incorporation of nanocrystals of zeolitic imidazolate frameworks (nano-ZIFs). We demonstrate that the inclusion of ZIF-8 and ZIF-7 nanocrystals into polymeric matrices (Matrimid and polyurethane [PU]) yields robust nanocomposites that preserve the C2H4adsorption/desorption capacity of nanocrystals while shielding it from degrading factors. We report new insights into the adsorption/desorption kinetics of the polymer and its corresponding nanocomposites, which can be tailored by exploiting the underlying polymeric molecular interactions. Importantly, we also elucidated the retention of the intrinsic structural framework dynamics of the nano-ZIFs even when embedded within the polymeric matrix, as evidenced from the breathing and gate-opening phenomena. Our findings pave the way for bespoke designs of novel polymer nanocomposites, which will subsequently impact the deployment of tailored nanomaterials for effective industrial applications.