长链硅烷对埃洛石纳米管的表面改性研究  

Surface Modification of Long-chain Alkyl Silane on HNTs

作　　者：马文石[1] 时镜镜[1] 王维[1] 宁平[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640

出　　处：《有机硅材料》2011年第4期248-252,共5页Silicone Material

基　　金：国家自然科学基金项目(51072059)

摘　　要：采用十二烷基三甲氧基硅烷对埃洛石纳米管（HNTs）进行表面改性,制备了改性埃洛石。改性后的埃洛石在甲苯、液体石蜡中的分散性提高,吸油量从90 mL/100 g降为51 mL/100 g,水接触角从2°提高到了137°,而且在pH值为3-11的水溶液中有很好的稳定性;即改性后HNTs的亲油疏水性能和耐酸碱性能都得到明显的提高。运用傅里叶变换红外光谱（FT-IR）、X射线光电子能谱（XPS）及热失重分析（TG）对改性前后的HNTs进行了结构表征,结果表明：长链烷基硅烷成功接枝到埃洛石纳米管的表面,接枝量约为1.9%。The modified halloysite was prepared by surface modification of dodecyltrimethoxysilane on halloysite nanotube（HNTs）.The modified HNTs had increased dispersity in toluene and liquid paraffin,and the oil absorption reduced from 90 mL/100g to 51 mL/100g,the water contact angle increased from 2° to 137°,with high stability under the aqueous solution of pH value between 3~11.The hydrophobic property and acid and alkali resistance of modified HNTs were obviously modified.Meanwhile,the structures were characterized with Fourier transform infrared spectroscopy（FT-IR）,X-ray photoelectron spectroscopy（XPS） and thermo-gravimetric analysis（TG）.Results showed that the long-chain alkyl silane grafted successfully on the surface of HNTs,and the grafted amount of long-chain alkyl silane was about 1.9%.

关 键 词：埃洛石纳米管 十二烷基三甲氧基硅烷 疏水改性 吸油量 水接触角 

分 类 号：TB383.1[一般工业技术—材料科学与工程]