微悬臂梁谐振技术检测溶液粘度的研究  

Study on Solution Viscosity Measurement Using a Resonating Microcantilever

作　　者：李艳宁[1] 唐洁[1] 饶志军[1] 傅星[1] 胡小唐[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《压电与声光》2005年第5期572-574,共3页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(50305025);天津市自然科学基金资助项目(F204008);教育部留学回国人员科研启动基金资助项目

摘　　要：提出了一种测量溶液粘度的微悬臂梁谐振技术。推导了溶液粘度与微悬臂梁的谐振频率的理论关系式,并利用原子力显微镜的微悬臂梁测量了不同质量分数的甘油溶液和蔗糖溶液的粘度。与落球法测量结果的比较表明,利用微悬臂梁谐振频率技术测量液体粘度的误差小于4%。这种方法不仅可以作为液体粘度的一般性测量方法,也可以通过检测溶液粘度变化来监测溶液中的化学反应。A solution viscosity measurement technique using a resonating microcantilever is proposed. The theoretical formula between the microcantilever＇s resonant frequency and solution viscosity in fluid is provided. Based on the formula, the viscosity of glycerol solutions and sucrose solutions with different concentration is measured with the microcantilever of atomic force microscope respectively and compared with the result of the falling ball method. The experimetal results showed that the measurement error of resonant frequency method is less than 4% . This method not only can be used as a general way for viscosity measurement, but also can be used to monitor the chemical reaction by monitoring the change of solution viscosity.

关 键 词：粘度 微悬臂梁 谐振频率 原子力显微镜 

分 类 号：TH7[机械工程—仪器科学与技术] TN2[机械工程—精密仪器及机械]