Mixed-matrix gas separation membranes were prepared by embedding various content of halloysite nanotubes (HNTs) (0, 0.5, 1, 1.5, and 2 wt%) within poly (ether-block-amide) matrix. XRD, FT-IR, TGA, and SEM analyses were conducted to study crystal structure, chemical bonds changes, thermal resistance, and cross-sectional morphology of the resultant membranes, respectively. Permeability values of pure CH 4 and CO 2 gases through the synthesized neat and mixed-matrix membranes (MMMs) were experimentally determined at constant temperature (25 °C) and several pressures (4, 6, 8, and 10 bar). The obtained results exhibited improved CO 2 permeability of the MMMs comparing with the pristine Pebax membrane. As an example, at a pressure of 4 bar, raising the incorporated HNTs loading from 0 to 2 wt% enhanced the permeability of CO 2 from 76.50 to 101.23 Barrer.

中文翻译：

---

埃洛石纳米管掺入对基于 Pebax 的膜的形态和 CO2/CH4 分离性能的影响

混合基质气体分离膜是通过将不同含量的埃洛石纳米管 (HNT)（0、0.5、1、1.5 和 2 wt%）嵌入聚（醚-嵌段-酰胺）基质中制备的。进行XRD、FT-IR、TGA和SEM分析以分别研究所得膜的晶体结构、化学键变化、耐热性和横截面形态。在恒温 (25 °C) 和多个压力（4、6、8 和 10 巴）下，通过实验确定纯 CH 4 和 CO 2 气体通过合成的纯混合基质膜 (MMM) 的渗透率值。与原始 Pebax 膜相比，获得的结果表明 MMM 的 CO 2 渗透性有所提高。例如，在 4 巴的压力下，将加入的 HNT 负载从 0 重量％提高到 2 重量％将 CO 2 的渗透率从 76.50 提高到 101。