硅烷偶联剂KH-570对纳米二氧化硅的表面改性研究  

Surface Modification of Nano-silica by Silane Coupling Agent KH-570

作　　者：刘琪[1] 崔海信[1] 顾微[1] 林春梅[1] 李颖[1] 

机构地区：[1]中国农业科学院农业环境与可持续发展研究所,北京100081

出　　处：《纳米科技》2009年第3期15-18,共4页

基　　金：国家“863”计划重大项目资助课题（2006AA10A203、2008AA100803）;中央级公益性科研院所基本科研业务费专项资金资助课题.

摘　　要：为改善用作农药载体的纳米SiO2的分散性和疏水性,以硅烷偶联剂KH-570对纳米SiO2进行了表面改性,通过SEM、XRD、FTIR以及元素分析等表征方法对产物结构和性能进行了分析,结果表明,KH-570能够成功地对纳米SiO2进行改性,并且提高其分散性。最佳偶联改性的反应条件为：改性剂用量5%,改性时间5h。在此条件下,改性纳米SiO2的接枝率为11.7%。The surface modification of nano-silica materials as pesticide carrier was realized with silane coupling agent KH-570 for the improvement of dispersivity and hydrophobicity. The surface modified nano-silica materials were characterized respectively by SEM, low-angle XRD, FTIR and clement analysis. The result showed that KH-570 can modificate nano-silica successfully and improve its dispersivity. The optimum surface modifiction conditions： mass fraction of KH- 570 is 5%; coupling reaction time is 5 h. Surface grafting ratio of nano-silica with KH-570 obtained under these conditions is 11.7%.

关 键 词：纳米二氧化硅 硅烷偶联剂 改性 

分 类 号：TB34[一般工业技术—材料科学与工程]