纳米二氧化硅表面改性及其对阿维菌素吸附和缓释性能  

Surface modification of the nano-SiO_2 and its properties of absorption and controlled-release for Avermectins

作　　者：林春梅[1] 崔海信[1] 刘琪[1] 孙长娇[1] 黎汉生[2] 

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 [2]北京理工大学化工与环境学院,北京100081

出　　处：《生态环境学报》2009年第1期197-200,共4页Ecology and Environmental Sciences

基　　金：国家“863”计划重大项目(2006AA10A203);中央级公益性科研院所基本科研业务费专项资金项目

摘　　要：以纳米SiO2为原材料,采用硅烷偶联剂KH-570对其进行表面改性,制备了具有疏水性的改性纳米SiO2,通过SEM、IR光谱分析以及元素分析,探讨了纳米SiO2改性后的形貌结构变化,以及其对阿维菌素的吸附和缓释性能。结果表明,经过硅烷偶联剂改性后的纳米SiO2分散性和亲油性都有了较好的改善,在乙醇中对阿维菌素的吸附率从13.98%提高到31.36%,并对阿维菌素具有较好的缓释效果,在溶出介质中对阿维菌素的控制释放时间可以持续80h,所以,经硅烷偶联剂改性后的纳米SiO2可以作为疏水性药物的控释载体。Nano-SiO2 surface was modified with the silicon coupling reagent KH570, modified nano-SiO2 was used as a carrier for adsorption and release of avermectins. The experimental results showed that KH-570 was bonded to the nano-SiO2 surface by Fourier infrared（FTIR） spectroscopy, element analysis, the result also indicated the dispersibility of modified nano-SiO2 was improved by scanning electron microscopy（SEM）, it has a high absorption capability for avermectins from 13.98% to 31.36% in alcohol with a controlled-release for 80h in medium. Thus, Modified nano-SiO2 can be used as an excellent carrier for hydrophobic drugs.

关 键 词：改性纳米二氧化硅 阿维菌素 控制释放 

分 类 号：X142[环境科学与工程—环境科学]