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利用3-氨丙基三乙氧基硅烷(APTES)对α-磷酸锆(α-Zr P)进行有机插层改性得到有机改性磷酸锆(OZr P),通过溶液共混法和热致相分离法(TIPS)制备了一种聚己内酯(PCL)/OZr P纳米复合多孔膜。通过X射线衍射仪(XRD)和傅里叶变换红外光谱仪(FTIR)分别研究了α-Zr P改性前后的物理结构、化学变化以及改性机理。通过扫描电镜(SEM)观察纳米复合多孔膜及其不同降解时间后的表面形貌,发现膜表面形成了尺寸均匀的纳米孔洞,孔径约为200~400 nm。采用质量亏损法来表征膜材料的降解,考察PCL、PCL/OZr P纳米复合多孔膜在相同降解环境下的降解速率。结果表明:PCL及PCL/OZr P纳米复合多孔膜在碱性溶液中降解性能最佳,降解60天其质量损失率可达100%。
The organic modified zirconium phosphate (OZr P) was obtained by organic intercalation modification of α-Zr phosphate (α-Zr P) with 3-aminopropyltriethoxysilane (APTES) A polycaprolactone (PCL) / OZr P nanocomposite porous membrane was prepared by phase separation method (TIPS). The physical structure, chemical change and modification mechanism of α-Zr P before and after modification were studied by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The surface morphology of nanocomposite porous films and their different degradation time were observed by scanning electron microscopy (SEM). The results showed that the nanostructured porous films with uniform size were formed on the surface of the nanostructured porous films with a diameter of about 200-400 nm. The mass loss method was used to characterize the degradation of membrane materials. The degradation rates of PCL and PCL / OZr P nanocomposite porous membranes under the same degradation environment were investigated. The results showed that PCL and PCL / OZr P nanocomposite porous films had the best degradation performance in alkaline solution. The mass loss rate of PCL and PCL / OZr P nanocomposite porous films reached 100% after 60 days.