改性碳纳米管对偏二甲肼的吸附热力学研究  

Adsorption Thermodynamics of Modified Carbon Nanotubes to Unsymmetric Dimethylhydrazine

作　　者：朱光威[1] 许国根[1] 

机构地区：[1]西安第二炮兵工程学院503室,陕西西安710025

出　　处：《化学推进剂与高分子材料》2009年第1期55-58,共4页Chemical Propellants & Polymeric Materials

摘　　要：对NaOH改性多壁碳纳米管吸附偏二甲肼的特性进行了研究,在温度为296～313K和浓度为44.51～211.41mg/L的范围内,多壁碳纳米管对偏二甲肼的吸附符合弗仑德利希(Freundlich)和兰缪尔(Langmuir)吸附等温式。不同温度下等温吸附曲线的测定和等量吸附焓的计算表明:多壁碳纳米管对偏二甲肼的吸附是吸热的。对偏二甲肼在多壁碳纳米管上的吸附焓、吉布斯自由能、吸附熵的计算表明,该多壁碳纳米管对偏二甲肼的吸附没有化学键生成,并对吸附行为作了机理性解释。The adsorption performance of multi-walled carbon nanotubes（MWNTs） modified by NaOH to unsymmetrical dimethylhydrazine（UDMH） was investigated. The adsorption of UDMH on MWNTs accorded with the Freundlich-type and Langmuirtype isothermal adsorption equations within the temperature range of 296-313 K and the concentration range of 44.51-211.41 mg/L. Isothermal adsorption curve at different temperature and isosteric enthalpy of adsorption of UDMH indicate that the process of adsorption of UDMH on MWNTs is an endothermic process. Estimation of enthalpy of adsorption, Gibbs free energy, and entropy of adsorption indicate that there is no forming chemical bond, and the adsorption behavior was reasonably interpreted from mechanism.

关 键 词：多壁碳纳米管 偏二甲肼 吸附热力学 

分 类 号：O647.31[理学—物理化学]