In this paper, a new type of soluble polyester/silica (PE/SiO₂) hybrid was prepared by the ultrasonic irradiation process. The coupling agent γ-glycidyloxypropyltrimethoxysilane (GOTMS) was chosen to enhance the compatibility between the polyester (PE) and silica (SiO₂). Furthermore, the effects of the coupling agent on the morphologies and properties of the PE/SiO₂ hybrids were investigated using UV-vis and FT-IR spectroscopies and FE-SEM. The densities and solubilities of the PE/SiO₂ hybrids were also measured. The results show that the size of the silica particle was markedly reduced by the introduction of the coupling agent, which made the PE/SiO₂ hybrid films become transparent. Furthermore, thermal stability, residual solvent in the membrane film and structural ruination of membranes were analyzed by thermal gravimetric analysis (TGA). The effects of SiO₂ nanoparticles on the glass transition temperature (T_g) of the prepared nanocomposites were studied by differential scanning calorimetry (DSC). Moreover, their mechanical properties were also characterized. It can be observed that the Young's moduli (E) of the hybrid films increase linearly with the silica content. The results obtained from gas permeation experiments with a constant pressure setup showed that adding SiO₂ nanoparticles to the polymeric membrane structure increased the permeability of the membranes.

本文通过超声辐照工艺制备了一种新型的可溶性聚酯/二氧化硅（PE / SiO ₂）杂化物。选择偶联剂γ-环氧丙氧基丙基三甲氧基硅烷（GOTMS）以增强聚酯（PE）和二氧化硅（SiO ₂）之间的相容性。此外，使用UV-vis和FT-IR光谱学和FE-SEM研究了偶联剂对PE / SiO ₂杂化体的形态和性能的影响。还测量了PE / SiO ₂杂化物的密度和溶解度。结果表明，通过引入偶联剂，二氧化硅颗粒的尺寸显着减小，这使得PE / SiO ₂混合膜变得透明。此外，通过热重分析（TGA）分析了热稳定性，膜膜中的残留溶剂和膜的结构破坏。通过差示扫描量热法（DSC）研究了SiO ₂纳米颗粒对制备的纳米复合材料的玻璃化转变温度（T _g）的影响。此外，还表征了它们的机械性能。可以观察到，杂化膜的杨氏模量（E）随二氧化硅含量线性增加。从具有恒定压力设置的气体渗透实验中获得的结果表明，向聚合物膜结构中添加SiO ₂纳米颗粒可增加膜的渗透性。