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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。
Lanthanum silicate crystal microbalance (LCM) is a new kind of piezoelectric sensor made of lanthanum silicate crystal as piezoelectric material, which has a sensitive frequency response to the change of surface mass load. The paraffin film was cast on the surface of LCM to monitor the mass change of sodium dodecyl benzene sulfonate on the surface of paraffin film in real time. The results showed that the adsorption process showed reversible adsorption characteristics, and Langmuir isotherm and kinetic model Regression analysis was carried out to obtain the parameters of adsorption / desorption rate constant, equilibrium constant, saturated adsorption capacity and the effect of salt concentration.