Effect of Mixing Technique on Physico-Chemical Characteristics of Blended Membranes for Gas Separation

IF 2.7 4区 环境科学与生态学 Q3 ENERGY & FUELS Greenhouse Gases: Science and Technology Pub Date : 2023-09-26 DOI:10.3390/gases3040009
Danial Qadir, Humbul Suleman, Faizan Ahmad
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Abstract

Polymer blending has attracted considerable attention because of its ability to overcome the permeability–selectivity trade-off in gas separation applications. In this study, polysulfone (PSU)-modified cellulose acetate (CA) membranes were prepared using N-methyl-2-pyrrolidone (NMP) and tetrahydrofuran (THF) using a dry–wet phase inversion technique. The membranes were characterized using scanning electron microscopy (SEM) for morphological analysis, thermogravimetric analysis (TGA) for thermal stability, and Fourier transform infrared spectroscopy (FTIR) to identify the chemical changes on the surface of the membranes. Our analyses confirmed that the mixing method (the route chosen for preparing the casting solution for the blended membranes) significantly influences the morphological and thermal properties of the resultant membranes. The blended membranes exhibited a transition from a finger-like pore structure to a dense substructure in the presence of macrovoids. Similarly, thermal analysis confirmed the improved residual weight (up to 7%) and higher onset degradation temperature (up to 10 °C) of the synthesized membranes. Finally, spectral analysis confirmed that the blending of both polymers was physical only.
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混合技术对气体分离混合膜理化特性的影响
聚合物共混由于能够克服气体分离中渗透性与选择性之间的权衡而引起了广泛的关注。本研究以n -甲基-2-吡罗烷酮(NMP)和四氢呋喃(THF)为原料,采用干湿相转化技术制备了聚砜(PSU)改性醋酸纤维素(CA)膜。采用扫描电镜(SEM)对膜进行形貌分析,热重分析(TGA)对膜进行热稳定性分析,傅里叶变换红外光谱(FTIR)对膜表面的化学变化进行表征。我们的分析证实,混合方法(为混合膜制备浇铸溶液所选择的路线)显著影响所得膜的形态和热性能。混合膜表现出从指状孔结构向存在大孔洞的致密亚结构的转变。同样,热分析证实了合成膜的残余重量(高达7%)和更高的起始降解温度(高达10°C)。最后,光谱分析证实了这两种聚合物的共混只是物理性质的。
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来源期刊
Greenhouse Gases: Science and Technology
Greenhouse Gases: Science and Technology ENERGY & FUELS-ENGINEERING, ENVIRONMENTAL
CiteScore
4.90
自引率
4.50%
发文量
55
审稿时长
3 months
期刊介绍: Greenhouse Gases: Science and Technology is a new online-only scientific journal dedicated to the management of greenhouse gases. The journal will focus on methods for carbon capture and storage (CCS), as well as utilization of carbon dioxide (CO2) as a feedstock for fuels and chemicals. GHG will also provide insight into strategies to mitigate emissions of other greenhouse gases. Significant advances will be explored in critical reviews, commentary articles and short communications of broad interest. In addition, the journal will offer analyses of relevant economic and political issues, industry developments and case studies. Greenhouse Gases: Science and Technology is an exciting new online-only journal published as a co-operative venture of the SCI (Society of Chemical Industry) and John Wiley & Sons, Ltd
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