In-situ synthesis of Metal Organic Frameworks (MOFs)-PA12 powders and their laser sintering into hierarchical porous lattice structures
In-situ synthesis of Metal Organic Frameworks (MOFs)-PA12 powders and their laser sintering into hierarchical porous lattice structures
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DOI：
10.1016/j.addma.2020.101774
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发表时间：
2021-02
影响因子：
11
通讯作者：
Binling Chen;R. Davies;Hong Chang;Yongde Xia;Yanqiu Zhu;O. Ghita
中科院分区：
文献类型：
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作者：
Binling Chen;R. Davies;Hong Chang;Yongde Xia;Yanqiu Zhu;O. Ghita
本文展示了利用原位合成的新型金属有机框架（MOF）-聚合物纳米复合材料激光烧结部件具有增强的CO2吸附性能。利用粉末床熔融工艺中最常见的材料之一聚酰胺PA 12作为基础聚合物，提出了在聚酰胺聚合物颗粒表面原位合成纳米填料ZIF-67晶体，以允许制造具有良好分散性的纳米复合材料粉末，减少使用松散纳米颗粒引起的任何健康和安全处理问题。这种原位合成方法允许ZIF-67纳米多孔位点的最大暴露。采用激光烧结技术制备了具有大孔和可控空腔的多孔结构，以增加表面积。激光烧结的ZIF-67-PA 12部件在仅2.6%wt ZIF-67浓度下在298 K和273 K下在1巴下表现出3.02和4.89 cm 3/g的CO2容量。这种制备ZIF 67-PA 12粉末的原位合成方法结合了设计自由度和易于制造的部件，为MOF的更广泛应用提供了机会，例如能量储存和转换。
This paper demonstrates the utilisation of in-situ synthesised novel metal organic framework (MOF)-polymer nanocomposite laser-sintered parts with enhanced CO2adsorption properties. Making use of polyamide PA12, one of the most common materials in powder bed fusion process as the base polymer, an in-situ synthesis of nanofiller ZIF-67 crystals on the surface of polyamide polymer particles was proposed to allow the fabrication of a nanocomposite powder with a good dispersion, reducing any health and safety handling issue arising from use of loose nanoparticles. This in-situ synthesis method allowed a maximum exposure of the ZIF-67 nano-porous sites. Laser sintering was used to fabricate porous structures with additional macro-pores and controlled cavities to increase the surface area. The laser-sintered ZIF67-PA12 part at only 2.6% wt ZIF-67 concentration exhibited a CO2capacity of 3.02 and 4.89 cm3/g at 298 K and 273 K at 1 bar. This in-situ synthesis method of making ZIF67-PA12 powders combined with the design freedom and the ease of fabrication of parts opens opportunities in a wider range of applications for MOFs such as energy storage and conversion.