Gamma Irradiation of Cellulose Acetate-Polyethylene Glycol 400 Composite Membrane and Its Performance Test for Gas Separation

Abstract

Gas separation processes through membrane permeation have attracted the attention of researchers recently due to their promising applications. In this study, we modified the cellulose acetate (CA) membrane to improve the membrane performance of CO2/CH4 gas separation. The CA membrane was modified by adding polyethylene glycol (PEG) 400 as the carrier and N, N'methylenebisacrylamide (MBA) as the cross-linking agent. Gamma-ray from cobalt 60 was used as a reaction initiator with variation in irradiation doses. The membrane characterization tests were conducted using scanning electron micrograph (SEM), Fourier transforms infrared (FTIR), and instron tensile strength tester. The permeability and selectivity of the membranes were tested against the single gases CO2 and CH4. The SEM analysis showed the morphology change in the membrane surface by gamma irradiation and a crosslinking agent. The spectra of FTIR showed a change in peak intensity on several polymer functional groups in the presence of gamma-ray irradiation. The tensile strength test showed that membranes with MBA have a higher mechanical strength than those without MBA. Based on the membrane permeability and selectivity tests, CO2 gas permeability was affected by pressure. The ideal selectivity of CO2/CH4 shows that the irradiated membrane has a higher selectivity than that of the non-irradiated membrane.

Characterization of Polyvinyl Alcohol–Collagen–Hydroxyapatite Composite Membrane from Lates calcarifer Scales for Guided Tissue and Bone Regeneration

“…This is in line with previous studies, which showed that homopolymerization could occur at specific doses of gamma irradiation, inhibiting cross-linking and decreasing tensile strength. 27 So, this study proves that the 25 kGy irradiated group has a more optimal tensile strength than the 15 kGy irradiation because it has stable bonds between compounds. The dry condition PVAcollagen-HA composite membrane has a high tensile strength ranging from 27.28 AE 8.39 to 41 AE 1.40 MPa.…”

Asymmetric membranes for gas separation: interfacial insights and manufacturing

“…The solution casting method was used for the fabrication of the CA membrane. The preparation of the dope CA solution, which included solvent mixture ratio, temperature, stirring time, and wait-on time; the parameters were drawn from several studies, including Febriasari et [27][28][29][30] The CA dope solution was prepared by dissolving 15 wt% in a solvent containing acetone and DMAc in a 2 : 1 ratio. The solution was homogenized in a round sealed glass container by stirring for 24 h, until a clear solution was observed.…”

A review on recent advances of cellulose acetate membranes for gas separation

“…The use of room-temperature ionic liquid membranes, whether homogeneous or biphasic, revealed variations in permeability and selectivity, emphasizing the inuence of casting methods on membrane performance. [17][18][19][20] Different blends, such as CA/polysulfone(CA/PSF), CA/ thiazole-based polyimine (PM-4), CA/polyimide (PI), and CA/ Pebax, have notably enhanced gas separation performances. The incorporation of polymer has shown remarkable potential in enhancing the gas separation performance of membranes.…”