聚己内酯/α-磷酸锆纳米复合多孔膜的制备及降解行为研究

Preparation and Degradation Behavior Research of Polycaprolactone/α-ZrP Nano Porous Membrane

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%。

Organic zirconium phosphate（OZr P） was modified by organic intercalation modification of zirconium zirconium phosphate（α-Zr P） with 3-ammonia propyl triethoxy silane（APTES）, and the PCL/OZr P nano porous membrane was prepared by solution blending method and thermal induced phase separation（TIPS）. The physical structure, chemical changes and the modification mechanism were studied by X-ray diffraction（XRD） and fourier transform infrared spectroscopy（FTIR）. Scanning electron microscopy（SEM） was used to observe the surface morphology of nano composite porous membrane and its degradation time. It was found that nano pores with uniform size were formed on the surface of the film, and the pore size was about 200~400 nm. The mass loss method was adopted to characterize the degradation of membrane material, the degradation speed and the influence of different time of degradation of membrane were observed. The results show that the PCL porous membrane and PCL/OZr P nano porous membrane degradation property in an alkaline solution are the best, the mass loss rate can reach about 100% after degradation of 60 days.