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

作　　者：古凤才[1] 王莉[1] 赵竹暄[1] 刘荫藩[1] 孙艺环[1] 严乐美[1] 

机构地区：[1]天津大学理学院化学系,天津300072

出　　处：《复合材料学报》2003年第5期77-81,共5页Acta Materiae Compositae Sinica

摘　　要：　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.

关 键 词：纳米复合材料 共混法 纳米二氧化硅 聚乙烯醇缩丁醛 

分 类 号：TQ32[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]