Department of Mechanical Engineering, College of Engineering, Taif University, P.O. Box 11099, Taif, 21955, Saudi Arabia.
Department of Physics, Lahore Garrison University, Lahore, Pakistan.
Environ Sci Pollut Res Int. 2023 May;30(25):66800-66811. doi: 10.1007/s11356-023-26962-x. Epub 2023 Apr 26.
In this study, PDMS incorporated with SWCNTs have been fabricated via solution casting method for industrial applications and characterized by the analyses of SEM, FTIR, TGA, AFM, and MST. The modified membranes were further analyzed for CO, O, and N gas permeability. The strategic membranes have five different weight ratios (0.013, 0.025, 0.038, 0.050, 0.063) compared to neat PDMS membranes. The even distribution of SWCNTs in PDMS provided results that showed improvement in thermal stability. However, mechanical strength has been weakened with increased concentration of nanofiller because of the increase in the number of SWCNTs by increases that imperfections become more severe. The designed polymeric membranes with good thermal stability and adequate mechanical strength can be used for the selectivity and permeability of CO, O, and N gases. The effect of the PDMS-SWCNTs on gas permeability has been studied. 0.063 wt.% SWCNTs presented the maximum permeability of CO gas while maximum O and N gas permeability have been obtained by 0.013 wt.% SWCNTs. The ideal selectivity of mixed (50:50) gas conditions has been tested. The maximum CO/N ideal selectivity was obtained by 0.050 and 0.063 wt.% SWCNTs while maximum O/N ideal selectivity obtained by 0.050 wt.% SWCNTs. Therefore, the fabrication of this novel SWCNTs-PDMS membrane may lead to separating the industrial exhaust and be used as a potential membrane for environmental remediation in the future.
在这项研究中，通过溶液浇铸法制备了 PDMS 与 SWCNTs 的复合材料，通过 SEM、FTIR、TGA、AFM 和 MST 分析对其进行了表征。进一步分析了改性膜对 CO、O 和 N 气体的渗透性。与纯 PDMS 膜相比，该改性膜具有 0.013、0.025、0.038、0.050 和 0.063 等 5 种不同的重量比。SWCNTs 在 PDMS 中的均匀分布使得热稳定性得到提高。然而，随着纳米填料浓度的增加，机械强度因 SWCNTs 数量的增加而减弱，这导致缺陷变得更加严重。具有良好热稳定性和足够机械强度的设计聚合物膜可用于 CO、O 和 N 气体的选择性和渗透性。研究了 PDMS-SWCNTs 对气体渗透性的影响。0.063wt.%SWCNTs 呈现出 CO 气体的最大渗透性，而 0.013wt.%SWCNTs 则获得了最大的 O 和 N 气体渗透性。测试了混合（50:50）气体条件下的理想选择性。0.050 和 0.063wt.%SWCNTs 获得了最大的 CO/N 理想选择性，而 0.050wt.%SWCNTs 获得了最大的 O/N 理想选择性。因此，这种新型 SWCNTs-PDMS 膜的制备可能会导致工业废气的分离，并有望在未来作为环境修复的潜在膜。
