Multi-cycle reversible control of gas permeability in thin film composite membranes via efficient UV-induced reactions

2021 ◽  
Vol 57 (27) ◽  
pp. 3391-3394
Author(s):  
Abdalrahman U. Alrayyes ◽  
Ze-Xian Low ◽  
Huanting Wang ◽  
Kei Saito
Keyword(s):  
Thin Film ◽  
Polymer Coating ◽  
Gas Permeability ◽  
Composite Membranes ◽  
Polymer Structure ◽  
Film Composite ◽  
Thin Film Composite ◽  
Thin Polymer

This communication reports the use of light to reversibly constrict or ease the flow of oxygen through a very thin polymer coating. This is achievable by reversibly changing the polymer structure from a dense and rigid film to a loose and soft film.

scholarly journals Ultrapermeable Thin Film Composite Membranes Enhanced via Doping MOF Nanosheets

2020 ◽  
Author(s):  
Min Liu ◽  
Ke Xie ◽  
MITCHELL NOTHLING ◽  
Lianhai Zu ◽  
qiang fu ◽  
...  
Keyword(s):  
Thin Film ◽  
Gas Separation ◽  
Gas Permeability ◽  
Polymeric Materials ◽  
Composite Membranes ◽  
Gas Diffusion ◽  
Separation Performance ◽  
Film Composite ◽  
Thin Film Composite ◽  
Tfc Membrane

Thin film composite (TFC) membranes have attracted increasing interest to meet the demands of industrial gas separation. However, the development of high performance TFC membranes within their current configuration faces two key challenges: (i) the thickness-dependent gas permeability of polymeric materials (mainly polydimethylsiloxane (PDMS)) and (ii) the geometric restriction effect due to the limited pore accessibility of porous substrates. Here we demonstrate for the first time that the incorporation of trace (~1.8 wt%) amounts of amorphous metal-organic framework (aMOF) nanosheets into the gutter layer of TFC assemblies can simultaneously address these two limitations, with experimental evidence revealing the creation of rapid gas diffusion pathways along horizontal direction. Leveraging this strategy, we successfully fabricated a novel TFC membrane, consisting of a PDMS/aMOF gutter and an ultrathin (~54 nm) poly(ethylene glycol) top selective layer<i> via</i> surface-initiated atom transfer radical polymerization (ATRP). The complete TFC membrane exhibits excellent processability and the highest CO<sub>2</sub> permeance (1,990 GPU with a CO<sub>2</sub>/N<sub>2</sub> ideal selectivity of 39) yet observed for a TFC membrane employing a PDMS gutter layer. This study reveals an avenue for the design and fabrication of a new TFC membrane system with unprecedented gas separation performance.

scholarly journals Ultrapermeable Thin Film Composite Membranes Enhanced via Doping MOF Nanosheets

2020 ◽  
Author(s):  
Min Liu ◽  
Ke Xie ◽  
MITCHELL NOTHLING ◽  
Lianhai Zu ◽  
qiang fu ◽  
...  
Keyword(s):  
Thin Film ◽  
Gas Separation ◽  
Gas Permeability ◽  
Polymeric Materials ◽  
Composite Membranes ◽  
Gas Diffusion ◽  
Separation Performance ◽  
Film Composite ◽  
Thin Film Composite ◽  
Tfc Membrane

Thin film composite (TFC) membranes have attracted increasing interest to meet the demands of industrial gas separation. However, the development of high performance TFC membranes within their current configuration faces two key challenges: (i) the thickness-dependent gas permeability of polymeric materials (mainly polydimethylsiloxane (PDMS)) and (ii) the geometric restriction effect due to the limited pore accessibility of porous substrates. Here we demonstrate for the first time that the incorporation of trace (~1.8 wt%) amounts of amorphous metal-organic framework (aMOF) nanosheets into the gutter layer of TFC assemblies can simultaneously address these two limitations, with experimental evidence revealing the creation of rapid gas diffusion pathways along horizontal direction. Leveraging this strategy, we successfully fabricated a novel TFC membrane, consisting of a PDMS/aMOF gutter and an ultrathin (~54 nm) poly(ethylene glycol) top selective layer<i> via</i> surface-initiated atom transfer radical polymerization (ATRP). The complete TFC membrane exhibits excellent processability and the highest CO<sub>2</sub> permeance (1,990 GPU with a CO<sub>2</sub>/N<sub>2</sub> ideal selectivity of 39) yet observed for a TFC membrane employing a PDMS gutter layer. This study reveals an avenue for the design and fabrication of a new TFC membrane system with unprecedented gas separation performance.

Tannin-based thin-film composite membranes integrated with nitrogen-doped graphene quantum dots for butanol dehydration through pervaporation

2021 ◽  
Vol 623 ◽  
pp. 119077
Author(s):  
Rumwald Leo G. Lecaros ◽  
Reincess E. Valbuena ◽  
Lemmuel L. Tayo ◽  
Wei-Song Hung ◽  
Chien-Chieh Hu ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Composite Membranes ◽  
Film Composite ◽  
Nitrogen Doped ◽  
Thin Film Composite ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Polyphenol Coating as an Interlayer for Thin-Film Composite Membranes with Enhanced Nanofiltration Performance

2016 ◽  
Vol 8 (47) ◽  
pp. 32512-32519 ◽  
Author(s):  
Xi Zhang ◽  
Yan Lv ◽  
Hao-Cheng Yang ◽  
Yong Du ◽  
Zhi-Kang Xu
Keyword(s):  
Thin Film ◽  
Composite Membranes ◽  
Film Composite ◽  
Thin Film Composite
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