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Synergistic influence of anisotropic 3D carbon nanotube-graphene hybrid mixed matrix membranes on stability and gas permeation characteristics
Journal of the Taiwan Institute of Chemical Engineers ( IF 5.7 ) Pub Date : 2019-10-23 , DOI: 10.1016/j.jtice.2019.09.027
Suchhanda S. Swain , Lakshmi Unnikrishnan , Smita Mohanty , Sanjay K. Nayak

Long-term gas separation performance and stability are the predominant factors enabling successful implementation of mixed matrix membranes (MMMs) for large-scale industrial applications. This study highlights the integration of CNT and graphene into Polysulfone (PSf) matrix and studied the synergistic effect on the permeation characteristics of O2/N2 pair. An electrical alignment technique has adopted for the preparation of the MMMs by solution casting method. Also, the parent counterparts, including PSf/CNT and PSf/rGO systems have prepared. FTIR, UV, and EDS established the existence of membrane-forming materials. The electron micrographs confirmed uniform dispersion of the filler phase within the PSf matrix, thereby indicating an effectual increase in the permeation characteristics. The hybrid system exhibited improved mechanical and thermal stability against other tested membranes. The prepared membranes showed excellent O2 permeation with higher selectivity for N2, despite the minimal difference in molecular size. The hybrid system rendered uniform permeation coefficient for 120 h; also displayed excellent hydrothermal and chemical stabilities, thus establishing commercial potential.



中文翻译:

各向异性3D碳纳米管-石墨烯混杂混合基质膜对稳定性和气体渗透特性的协同影响

长期的气体分离性能和稳定性是确保成功将混合基质膜(MMM)用于大规模工业应用的主要因素。这项研究着重介绍了将CNT和石墨烯整合到聚砜(PSf)基质中,并研究了其对O 2 / N 2渗透特性的协同作用。一对。通过溶液浇铸法已经采用电对准技术来制备MMM。此外,包括PSf / CNT和PSf / rGO系统在内的母公司也已准备就绪。FTIR,UV和EDS确定了成膜材料的存在。电子显微照片证实了填料相在PSf基体内的均匀分散,从而表明了渗透特性的有效提高。杂化系统对其他测试膜表现出改进的机械和热稳定性。制备的膜表现出优异的O 2渗透性,对N 2的选择性更高,尽管分子大小差异很小。混合系统提供了120 h的均匀渗透系数;还显示出优异的水热和化学稳定性,从而建立了商业潜力。

更新日期:2019-10-24
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