Preparation of a Facilitated Transport Membrane Composed of Carboxymethyl Chitosan and Polyethylenimine for CO2/N2 Separation

Abstract

The miscibility of carboxymethyl chitosan/polyethylenimine (CMCS/PEI) blends was analyzed by FT-IR, TGA and SEM. Defect-free CMCS/PEI blend membranes were prepared with polysulfone (PSf) ultrafiltration membranes as support layer for the separation of CO2/N2 mixtures. The results demonstrate that the CMCS/PEI blend is miscible, due to the hydrogen bonding interaction between the two targeted polymers. For the blended membrane without water, the permeability of CO2 gas is 3.6 × 10−7 cm3 cm−2 s−1 cmHg−1 and the corresponding separation factor for CO2 and N2 gas is about 33 at the pressure of 15.2 cmHg. Meanwhile, the blended membrane with water has the better permselectivity. The blended membrane containing water with PEI content of 30 wt% has the permeance of 6.3 × 10−4 cm3 cm−2 s−1 cmHg−1 for CO2 gas and a separation factor of 325 for CO2/N2 mixtures at the same feed pressure. This indicates that the CO2 separation performance of the CMCS/PEI blend membrane is higher than that of other facilitated transport membranes reported for CO2/N2 mixture separation.

A 3D bioprinted in situ conjugated‐co‐fabricated scaffold for potential bone tissue engineering applications

“…Finally, the decomposition of the carbonaceous material occurred at 3758C. 33 These results are consistent with the thermal stability findings above. There is delay in eventual decomposition of the scaffold compared to the individual components due to the ionic interaction.…”

“…Figure 2(b) represents the spectrum of pristine sodium alginate, which displayed a broad stretch at 3500-3000 cm 21 associated with OAH stretching and two distinct peaks at 1595 and 1397 cm 21 which are attributed to the asymmetrical and symmetrical vibration of COO 2 functional groups, respectively. 32,33 Figure 2(d) depicts the spectrum of the bioprinted polymeric scaffold (Alg-PEI/Si). 31 Figure 2(c) represents the pristine PEI FTIR spectrum, which possessed the following significant bands: the two peaks at 3345 and 3287 cm 21 arise from NH 2 stretching vibration; the strong peaks at 2945 and 2844 cm 21 are associated with asymmetrical and symmetrical vibrations of CH 2 groups, respectively; and the peaks at 1599 and 1645 cm 21 are associated with NAH bending.…”

Polyethylenimine Applications in Carbon Dioxide Capture and Separation: From Theoretical Study to Experimental Work

“…Shen et al. cast PEI and carboxymethyl chitosan onto polysulfone (PSF) ultrafiltration membranes, and the optimized membrane with 30 wt % PEI loading had a permeance of 630 GPU (GPU=gas permeation unit) for CO 2 gas and a CO 2 /N 2 selectivity of 325 at 2 atm . Mondal and Mandal developed thermally stable cross‐linked thin‐film composite PVA/polyvinylpyrrolidone (PVP) blend membranes doped with PEI for CO 2 separation, and a maximum CO 2 /N 2 selectivity of 270 and CO 2 permeance of 29 GPU were achieved at 100 °C with optimization of the membrane design .…”

Optimasi pembuatan membran chitosam dalam penurunan COD dan BOD POME (Palm Oil Mill Effluent) [Optimization of the membrane production process to COD and BOD removal of POME (Palm Oil Mill Effluent)]

“…Sebagai contoh, membran CS telah digunakan dalam desalinasi (Huang et al, 2008;Huang et al, 2009), pervaporasi dehidrasi organik (Zhao et al, 2011), pemisahan gas (Shen et al, 2013), dan bahan bakar sel (Horimatsu et al, 2013;Xiong et al, 2008). Namun, CS masih memiliki beberapa kekurangan karena sifatnya yang rapuh dan hidroskopis.…”