Silica (SiO2) nanoparticles were first functionalized using (3-aminopropyl) triethoxysilane (APTES) and then utilized as filler for the preparation of poly (ether-block-amide) (Pebax®-1074) based mixed-matrix membranes (MMMs). To characterize the modified nanoparticles and the prepared membranes, Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and thermal gravimetric analysis (TGA) were conducted. The influences of the pure and amine-modified nanoparticles content, and feed temperature and pressure on CO2 and CH4 permeability and ideal CO2/CH4 selectivity values of the membranes were studied. The permeation experiments exhibited that the incorporation of 12.5 wt% of amine-functionalized SiO2 nanoparticles into the Pebax matrix raises the CO2 permeability and ideal CO2/CH4 selectivity about 100 and 32%, respectively.

中文翻译：

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功能化SiO2纳米颗粒对Pebax基混合基质膜形貌和CO2/CH4分离效率的影响

首先使用（3-氨基丙基）三乙氧基硅烷（APTES）对二氧化硅（SiO2）纳米粒子进行功能化，然后将其用作制备基于聚（醚-嵌段-酰胺）（Pebax®-1074）的混合基质膜（MMM）的填料。为了表征改性纳米颗粒和制备的膜，进行了傅里叶变换红外 (FTIR) 光谱、场发射扫描电子显微镜 (FESEM)、X 射线衍射 (XRD) 和热重分析 (TGA)。研究了纯纳米颗粒和胺改性纳米颗粒的含量、进料温度和压力对膜的 CO2 和 CH4 渗透率以及理想的 CO2/CH4 选择性值的影响。渗透实验表明掺入了 12.