作　　者： ; ; ; ;

机构地区： 江汉大学化学与环境工程学院

出　　处： 《塑料》 2010年第3期51-53,36,共4页

摘　　要： 将稻壳用酸处理后在600℃焚烧得到纯度为99.3%,比表面积为212 m2/g的SiO2,用偶联剂γ-氨丙基三乙氧基硅烷(KH550)改性后,SiO2的平均粒径为60 nm。将改性后的稻壳SiO2与环氧树脂(EP)复合,考察稻壳SiO2含量为1%、3%、5%、10%时复合材料在不同温度下的吸水率和弯曲性能,并探讨偶联剂KH550的用量、材料的孔隙率对吸水性的影响。结果表明:稻壳SiO2/EP纳米复合材料的吸水性先随SiO2含量增加而增加,当SiO2质量含量为10%时开始下降。温度和材料中孔隙含量增加使复合材料的吸水率增加,而KH550用量增加能降低吸水率。此外不同组成的复合材料弯曲性能优于纯EP树脂,相同SiO含量的复合材料,弯曲性能提高幅度依赖于偶联剂的用量。 Rice husk silica with purity of 99.3 % and the specific surface area value of 212 m^2/g was obtained by burning at 600 ℃ after the HCl treated rice husk. After being modified with γ-glycidyloxipropyltrimethoxysilane （KH-550）, silica particles of 60 nm were obtained and subsequently used as filler to prepare epoxy-based nanocomposite. Water absorption and flexural properties of composite with 1% ,3 % ,5 % , 10 % SiO2 contents were studied. The effects of KH-550 contents and the porosity on water absorption were studied too. Results showed that water absorption of composite increased firstly with increasing of SiO2 content and then decreased when silica content was 10 % . Water absorption of the composite increased with the increasing of temperature and void content in material and decreased with the amount of KH550 reduced in materials. In additional,depending on the silica and KH550 contents,the flexural strength and modulus of the nanocomposite also could be increased more or less compared with neat resin.

关 键 词： 稻壳二氧化硅 环氧树脂 纳米复合材料 吸水性 弯曲性能

领　　域： [化学工程]