羧甲基纤维素钠/蒙脱土纳米复合材料的制备及结构表征  

PREPARATION AND STRUCTURE CHARACTERIZATION OF SODIUM CARBOXYMETHYLCEL-LULOSE/MONTMORILLONITE NANOCOMPOSITES

作　　者：王丽[1] 庞方亮[1] 王爱勤[2] 

机构地区：[1]内蒙古农业大学材料科学与艺术设计学院,呼和浩特010018 [2]中国科学院兰州化学物理研究所,兰州730000

出　　处：《硅酸盐学报》2010年第9期1820-1825,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(20867004)资助项目

摘　　要：采用溶液插层法制备羧甲基纤维素钠/蒙脱土纳米复合材料,研究不同羧甲基纤维素钠溶液pH值、反应温度、反应时间和羧甲基纤维素钠与蒙脱土的质量比等因素对纳米复合材料有机化程度的影响。用X射线衍射、红外光谱、扫描电镜及透射电镜对样品进行结构表征,用热重分析对样品热性能进行分析。结果表明:羧甲基纤维素钠通过破坏蒙脱土的晶体结构插层进入到蒙脱土层间,形成插层–剥离型纳米复合材料;与羧甲基纤维素钠相比,纳米复合材料的热稳定性有了很大提高。Sodium carboxymethylcellulose/montmorillonite nanocomposites were prepared by a solution intercalation technique.The effects of the pH value of sodium carboxymethylcellulose solution,reaction temperature,reaction time and the mass ratio of sodium carboxymethylcellulose to montmorillonite on the organic degree of nanocomposite were investigated.The structure of the samples was characterized by X-ray diffraction,infrared spectroscope,scanning electron microscope and transimission electron microscope.The thermal property was measured by thermogravimetric analysis.The results show that sodium carboxymethylcellulose intercalates into montmorillonite interlayer via destroying the crystalline structure of montmorillonite,and the intercalated-exfoliated structure is formed in sodium carboxymethylcellulose/montmorillonite nanocomposite.The thermal stability of the nanocomposite could be improved,compared to that of sodium carboxymethylcellulose.

关 键 词：羧甲基纤维素钠 蒙脱土 纳米复合材料 有机化程度 

分 类 号：TQ050.4[化学工程]