Generation of Active Carboxyl Groups on the Surface of a Polyethylene Terephthalate Film and Their Quantitation by Digital Fluorescence Microscopy

Miftakhov, R. A.; Lapa, S. A.; Шершов, В. Е.; Zasedateleva, Olga A.; Гусейнов, Т. О.; Спицын, М. А.; Кузнецова, В. Е.; Mamaev, D. D.; Lysov, Yu. P.; Barsky, V. E.; Timofeev, Edward N.; Заседателев, А. С.; Чудинов, А. В.

doi:10.1134/s0006350918040127

Cited by 6 publications

(1 citation statement)

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“…This work was designed to develop a strategy to realize a flexible pure metal–organic framework (MOF) membrane using a flexible support. The polyethylene terephthalate (PET) membranes were chosen as a support material because of the generation of inherent chemical groups on exposure to alkali solution. , The process of PET membrane irradiation with swift heavy metal ions followed by chemical track-etching using NaOH solution for the fabrication of nanochannels. The track-etched membranes are referred as nanoporous PET (np-PET) with nanochannel diameter depending on track-etching conditions.…”

Section: Results and Discussionmentioning

confidence: 99%

Highly Efficient Permeation and Separation of Gases with Metal–Organic Frameworks Confined in Polymeric Nanochannels

Usman

Ali

Al‐Maythalony

et al. 2020

ACS Appl. Mater. Interfaces

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This work demonstrates the confinement of porous metal–organic framework (HKUST-1) on the surface and walls of track-etched nanochannel in polyethylene terephthalate (np-PET) membrane using a liquid-phase epitaxy (LPE) technique. The composite membrane (HKUST-1/np-PET) exhibits defect-free MOF growth continuity, strong attachment of MOF to the support, and a high degree of flexibility. The high flexibility and the strong confinement of the MOF in composite membrane results from (i) the flexible np-PET support, (ii) coordination attachment between HKUST-1 and the support, and (iii) the growth of HKUST-1 crystal in nanoconfined geometries. The MOF has a preferred growth orientation with a window size of 3.5 Å, resulting in a clear cut-off of CO2 from natural gas and olefins. The experimental results and DFT calculations show that the restricted diffusion of gases only takes place through the nanoporous MOF confined in the np-PET substrate. This research thereby provides a new perspective to grow other porous MOFs in artificially prepared nanochannels for the realization of continuous, flexible, and defect-free membranes for various applications.

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Section: Results and Discussionmentioning

confidence: 99%