Nano-confinement-inspired metal organic framework/polymer composite separation membranes. Issue 33 (11th August 2020)

• Record Type: Journal Article
• Authors: Li, Xiaoting; Wang, Naixin; Bao, Xinmin; Li, Qian; Li, Jie; Xie, Ya-Bo; Ji, Shulan; Yuan, Jiayin; An, Quan-Fu
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 33(2020)
• Page Start: 17212
• Page End: 17218
• Publication Date: 2020-08-11
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta02412k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A new route to engineering a MOF/polymer composite membrane with defect-free, robust and selective layer inside the nano-confinement pores of substrate. Abstract : A defect-free, robust and selective barrier is essential for manufacturing membranes with targeted high permeability and selectivity. Here we report a new route to engineering a separation composite membrane by confining both channels in nanoscale metal organic frameworks (MOFs) and charges in a polyelectrolyte in the inner space of a porous support via a counter-diffusion method. A simple thermal annealing treatment of the interface between the MOF, polymer and support favorably reduced voids inside this nano-confinement environment. As this composite membrane combines both the support and barrier as one, it minimizes mass transfer resistance of water molecules. In a separation test, it readily achieved the state-of-the-art permeance. This simple chemical approach to upgrade membrane structures will offer wide opportunities in separation devices.