EVOH/纳米SiO_2复合材料的溶液共混制备及其性能  

Preparation of EVOH/nano-SiO_2 composites by solution co-blending and its properties

作　　者：刘跃军[1] 刘亦武[1] 魏珊珊[1] 

机构地区：[1]湖南工业大学包装新材料与技术重点实验室,湖南株洲412007

出　　处：《功能材料》2010年第A01期84-88,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(10972076);湖南省杰出青年基金资助项目(07JJ1001);湖南省科技计划资助项目(2009GK3127);湖南工业大学研究生创新基金资助项目(CX0903)

摘　　要：采用化学沉淀法制备了纳米Si O2,并用硅烷偶联剂KH550对其进行原位改性,以N,N-二甲基甲酰铵为溶剂,采用溶液共混法制备了EVOH/纳米Si O2复合材料,并吹塑成薄膜。对纳米Si O2和复合材料进行了表征。结果表明,化学沉淀法制备的纳米Si O2为球形,粒径约20nm,原位改性效果良好。溶液共混法制备EVOH/纳米Si O2复合材料,纳米Si O2在EVOH中的分散性较好,EVOH/纳米Si O2(5%(质量分数)Si O2,KH550改性)复合材料相较于纯EVOH,拉伸强度提高96.3%,透湿、透气系数分别下降35.9%、51.1%,透光率达到75.6%,雾度为12.74%。Nano-SiO2 was prepared by chemical precipitation method and in-situ modified with silane coupling agent KH550.The EVOH/nano-SiO2 composites were prepared by solution co-blending method with the N,N-dimethyl-carbamoyl ammonium as the solvent and blown into a film.Nano-SiO2 and composites were characterized.The results showed that the nano-SiO2 prepared by chemical precipitation method was spherical and the average diameter was about 20nm.The in-situ modification effect was good.When the EVOH/nano-SiO2 composites were prepared by solution co-blending method,the nano-SiO2 dispersed in the EVOH evenly.Compared to the pure EVOH,the tensile strength of the EVOH/nano-SiO2 composites increased by 96.3%,the coefficient of moisture permeability and permeability coefficient of the EVOH/nano-SiO2 composites decreased by 35.9% and 51.1% respectively,light transmission rate was 75.6% and haze was 12.74%.

关 键 词：EVOH 纳米SIO2 溶液共混法 阻隔性能 

分 类 号：TQ33[化学工程—橡胶工业]