聚乙烯醇缩丁醛/SiO_2纳米复合材料的研究

STUDY OF POLY (VINYL BUTYRAL)/SILICA NANOCOMPOSITE MATERIALS

采用共混法在聚乙烯醇缩丁醛材料中引入纳米SiO2粒子制备了均匀的PVB/SiO2复合材料。以UV-VIS,FT-IR,XRD,SEM等现代测试手段表征了材料的微观形貌、结构和光学性能。结果表明:由于纳米SiO2粒子的引入,使PVB/SiO2复合材料具有良好的紫外线屏蔽性能。同时,材料的韧性得到明显提高,其断裂伸长率为纯PVB材料的8倍。该材料的制备方法简便易行,具有一定的工业应用前景。

Poly (vinyl butyral)/silica nanocomposite materials in which the content of nanosized silica is varied from 2 wt% to 16 wt% were prepared by a co-mixing process. The microstructure, morphology and optical properties of the composite were studied by UV-VIS, FTIR, SEM and XRD. The results show that the silica forms nanometer microphase with the diameter from about 30 nm to 50 nm and disperses in the poly (vinyl butyral) matrix. It is found that ultraviolet rays from 290 nm to 400 nm can be effectively absorbed but they can be shielded by the transparent resin membrane made from the PVB/SiO2 nanocomposite. The mechanical properties of the composite were also investigated, and the result is obtained that the elongation at break is 18% for DVB materials and 148% for PVB/SiO2 nanocomposite, respectively. Meanwhile, the current technique is characterized by many advantages, such as usage simplicity, low cost, easy control and broader applicability.