UiO‐66‐NH2 particle size effects on gas separation performance of cellulose acetate composite membranes

UiO‐66‐NH2 (Zr‐based metal organic framework) is integrated into cellulose acetate (CA) to fabricate mixed matrix membranes (MMMs) through solvent‐casting approach. To regulate the interfacial compatibility and suppress the non‐selective voids, UiO‐66‐NH2 with different particle sizes are investigat...

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Bibliographic Details
Published in:Journal of applied polymer science 2022-09, Vol.139 (33), p.n/a
Main Authors: Hu, Zhirong, Miu, Jiayu, Zhang, Xiong‐Fei, Jia, Mingmin, Yao, Jianfeng
Format: Article
Language:English
Subjects:
Carbon dioxide
Cellulose acetate
Gas separation
Interfacial properties
Materials science
Membranes
Metal-organic frameworks
Optimization
Particle size
Polymers
polysaccharides
porous materials
separation techniques
Size effects
Zirconium
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Summary:UiO‐66‐NH2 (Zr‐based metal organic framework) is integrated into cellulose acetate (CA) to fabricate mixed matrix membranes (MMMs) through solvent‐casting approach. To regulate the interfacial compatibility and suppress the non‐selective voids, UiO‐66‐NH2 with different particle sizes are investigated. The introduction of UiO‐66‐NH2 provides additional pathways for gas molecules and renders the membrane with high CO2 affinity, substantially augmenting the separation efficiency of UiO‐66‐NH2@CA composite membrane. By optimizing the particle size of UiO‐66‐NH2, the non‐selective voids and the particle agglomeration can be effectively restricted. The optimum separation performance is obtained by U‐100@CA membrane (UiO‐66‐NH2: 200 nm in size), exhibiting a CO2 permeability of 168.8 Barrer with CO2/N2 and CO2/CH4 ideal selectivities of 40.2 and 51.3, respectively. The separation mechanism is ascribed to the presence of sufficient amine groups, the high CO2 solubility of CA matrix, and superior inorganic–organic interfacial property.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.52810