QI Yong, KANG Qi, LI Xiao-yu, et al. Monitor adsorption performance of surfactant on paraffine film by LCM[J]. 2006, (9): 43-45. DOI: 10.13873/j.1000-97872006.09.014.
硅酸镧镓晶体微天平测定石蜡膜的吸附特性
摘要
硅酸镧镓晶体微天平(LCM)是以硅酸镧镓晶体为压电材料研制的新型压电式传感器
对表面质量负载变化有灵敏的频率响应。在LCM表面浇铸石蜡薄膜
实时监测十二烷基苯磺酸钠在石蜡膜表面吸附过程中的质量变化
结果表明:其吸附过程呈现可逆吸附特征
并可以用Langmu ir等温线和动力学模型进行回归分析
获得吸附/脱附速率常数、平衡常数、饱和吸附量等参数
并讨论了盐浓度的影响。
Abstract
A langasite crystal microbalance(LCM)
a new type of piezoelectric sensor is fabricated by using langasite crystal as the piezoelectric material.The LCM has a sensitive frequency response to the change on surface mass loading.A paraffine film is cast on the surface of the LCM.The adsorbed mass of sodium dodecyl sulfonate on paraffine surface is monitored real time by the LCM sensor.The result shows shown that the adsorption performance is reversible and regress analyse is done by the Langmuir type isotherm.The rate constants for adsorption and desorption
equilibrium constant of adsorption and saturation adsorbed mass are obtained.The influence of salt concentration is tested.
关键词
Keywords
references
Oscillating Frequency Response of a Langasite Crystal Microbalance in Liquid Phase [J]. Qi KANG1,Huai Jin ZHANG2, Xue Yong LIU1, Da Zhong SHEN1 1School of Chemistry and Chemical Engine ering, Shandong University, Jinan 250100 2 State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100. Chinese Chemical Letters . 2005(11)