期刊
CARBOHYDRATE POLYMERS
卷 252, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.117215
关键词
Cellulose acetate (CA); Polymeric blend membrane; Gas separation; Permeation; Thiazole; CO2 capture
资金
- Iran National Science Foundation (INSF) [96007054]
- Kharazmi University
Green blend membranes with high thermal resistance were fabricated, and their properties were analyzed using various methods. The study focused on the effects of temperature and pressure changes on CO2 permeability and selectivity.
Green blend membranes comprise of high thermal resistance ortho-linked thiazole-based polyimine (PM-4) including thioether linkage were fabricated in combination of glassy cellulose acetate (CA). The thermal stabilities of PMs were examined using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Morphological aspects and functional groups of the membranes were investigated via field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR) analysis respectively. X-ray diffraction (XRD) and mechanical strength were determined as well. The effects of polyimine content, pressure and temperature were studied on CO2 permeability (P) and selectivity. The pressure changes revealed exponentially increases on CO2 permeability by plasticization, facilitated transfer and solution-diffusion mechanisms, but decreases on CH4 and N-2 permeations. Remarkable permeation (P = 3000 Barrer) of CA/PM-4 (1:3 % w/w) and ideal selectivity ratios of CO2/N-2 = 59, CO2/CH4 = 33.7 were obtained at 3 bar and 35 degrees C versus neat CA membrane.
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