The Influence of Cu₃(BTC)₂ metal organic framework on the permeability and perm‐selectivity of PLLA‐MOF mixed matrix membranes

Abstract

Poly(L-lactic acid) (PLLA) -20% (w/w) and Cu 3 (BTC) 2 metal organic framework (MOF) based mixed matrix membranes (MMMs) were fabricated by a vertical corotating twin screw microcompounder followed by an injection molding process. Water vapor, CO 2, O 2 , and selected aroma mass transfer properties of PLLA and PLLA MMMs were evaluated. The CO 2 /O 2 perm-selectivity of PLLA (a CO2/O2 ) MMMs increased from 7.6 to 10.3 with the incorporation of 20% Cu 3 (BTC) 2 MOF. Gravimetric permeability studies of trans-2-hexenal performed at 238C and 50% RH indicated that permeability coefficient of PLLA MMMs increased by around 60% as compared to regular PLLA film. However, no changes in mass transfer rates were observed for acetaldehyde. Furthermore, the thermal processing parameters as well as the presence of MOF did not show any significant effect on the molecular weight of the PLLA matrix nor on the crystalline structure of the Cu 3 (BTC) 2 MOF, which was confirmed by both gel permeation chromatography and X-ray diffraction studies.

Influence of Blend Composition and Silica Nanoparticles on the Morphology and Gas Separation Performance of PU/PVA Blend Membranes

“…Membrane technology plays an important role in reducing the manufacturing cost and energy consumption in industrial processes [1,2,3,4]. For many practical applications, such as CO 2 removal from natural gas or CO 2 /N 2 separation, seeking new materials with high gas permeability and selectivity is great importance [5,6]. Polymer blending and mixed-matrix membranes (MMMs) are attractive techniques for the development of membranes with high separation performance.…”

Preparation of Cu3(BTC)2/PVC mixed matrix membrane for pomegranate seed storage

“…Compared with PVC membrane, CO 2 permeability coefficient of Cu 3 (BTC) 2 / PVC MMM was increased significantly from 4.34 Â 10 À15 to 1.81 Â 10 À14 cm 3 cm/(cm 2 s Pa), which increased by four times (Figure 5a). This was explained by the high quadrupole/quadrupole interactions between the Cu 3 (BTC) 2 composites and CO 2 (Kathuria, Al-Ghamdi, Abiad, & Auras, 2015). However, O 2 permeability coefficient was increased slightly with the addition of Cu 3 (BTC) 2 composites, this was due to poor van der Waals interactions between the Cu 3 (BTC) 2 composites and O 2 (Torrisi, Bell, & Mellot-Draznieks, 2010).…”

PLLA‐ZIF‐8 metal organic framework composites for potential use in food applications: Production, characterization and migration studies

“…13 They are well known for their high surface area, gas sorption, gas separation, selectivity, low cytotoxicity, and chemical sensing. [13][14][15][16] MOFs have unique structural properties among other organic, inorganic porous materials such as zeolites and activated carbon. Their high porosity and symmetrical reticulate structure allow them to selectively host various guest molecules such as CO 2 , H 2 , N 2, and CH 4.…”

“…Their high porosity and symmetrical reticulate structure allow them to selectively host various guest molecules such as CO 2 , H 2 , N 2, and CH 4. [13][14][15][16][17][18] MOF molecules have been researched…”