| Summary: | 碩士 === 中原大學 === 化學研究所 === 94 === Here we report the homogeneous dispersion of nanoscale mesoporous silica (NMS) and colloidal alumina into PVA matrix to form novel PVA/NMS nanocomposites and PVA/ colloidal alumina nanocomposites via hydrogen bonding. The properties of the hybrids were studied in the film form as a function of the NMS and colloidal alumina concentration in the matrix polymer. The NMS and colloidal alumina concentration of the composites was varied from 0 to 10 wt %. The nanoscale mesoporous silica materials and colloidal alumina are characterized by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM). Effects of the material composition on the thermal stability, mechanical strength, optical clarity, barrier properties of PVA along with a series of PVA/NMS nanocomposites and PVA/ colloidal alumina nanocomposites materials, in the form of fine powder and free-standing film, are also studied by TGA, DSC, DMA, UV–visible transmission spectra, GPA and VPA respectively. In addition, thermal, mechanical and barrier properties of the PVA were investigated after incorporation of the NMS and colloidal alumina.
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