Department of Organic Chemistry, Faculty of Chemistry, Kharazmi University, Mofatteh Avenue 49, 15719-14911 Tehran, Iran.
Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, Mofatteh Avenue 49, 15719-14911 Tehran, Iran.
Carbohydr Polym. 2021 Jan 15;252:117215. doi: 10.1016/j.carbpol.2020.117215. Epub 2020 Oct 14.
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 CO permeability (P) and selectivity. The pressure changes revealed exponentially increases on CO permeability by plasticization, facilitated transfer and solution-diffusion mechanisms, but decreases on CH and N permeations. Remarkable permeation (P = 3000 Barrer) of CA/PM-4 (1:3 % w/w) and ideal selectivity ratios of CO/N = 59, CO/CH = 33.7 were obtained at 3 bar and 35 °C versus neat CA membrane.
绿色共混膜由高热稳定性的邻位连接噻唑基聚亚胺（PM-4）组成，包括硫醚键，与玻璃态纤维素乙酸酯（CA）结合而成。采用热重分析（TGA）和差示扫描量热法（DSC）研究了 PM 的热稳定性。通过场发射扫描电子显微镜（FESEM）和傅里叶变换衰减全反射红外光谱（FTIR-ATR）分析分别研究了膜的形态和官能团。还测定了 X 射线衍射（XRD）和机械强度。研究了聚亚胺含量、压力和温度对 CO 渗透率（P）和选择性的影响。压力变化表明，增塑、促进传递和溶解扩散机制使 CO 渗透率呈指数级增加，但对 CH 和 N 的渗透率降低。在 3 巴和 35°C 下，与纯 CA 膜相比，CA/PM-4（1:3%w/w）获得了显著的渗透（P=3000 巴）和理想的 CO/N=59、CO/CH=33.7 的选择性比。
