基于梁弯曲拉脱法测量液体表面张力系数的实验研究  

Experimental Study on the Measurementof Liquid Surface Tension Coefficient Basedon Beam Bending Pull-off Method

作　　者：万佳 汪海宾 WAN Jia;WANG Haibin(School of Science,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212003)

机构地区：[1]江苏科技大学理学院,江苏镇江212003

出　　处：《物理通报》2024年第11期119-123,共5页Physics Bulletin

基　　金：江苏省高等教育教改研究立项课题,课题编号:2023JSJG389;江苏科技大学课程思政示范课建设项目,项目编号:1052022301.

摘　　要：基于拉伸法测量金属丝的杨氏模量实验启发,对光杠杆进行改造,利用激光笔代替测微目镜,金属梁取代钢丝,对梁弯曲进行定标后,运用拉脱法实现对液体表面张力系数的测定.该装置相较于焦利氏秤法和FDNST-Ⅰ型液体表面系数测定仪,具有稳定性好、结构简单、操作方便、成本低和实验效果好等优点.Inspired by the experiment of measuring Young′s modulus of a metal wire using the tensile method,this paper introduces a modified optical lever system.In this setup,the micrometer eyepiece is substituted with a laser pointer,and the metal wire is replaced by a beam.After calibrating the bending of the beam,the liquid surface tension coefficient is measured by pull-off method.Compared with Gioli′s scale method and the FD-NST-I liquid surface tension coefficient tester,this device has the advantages of good stability,simple structure,convenient operation,low cost,and satisfactory experimental results.

关 键 词：拉脱法 液体表面张力 梁弯曲 光杠杆 

分 类 号：O552.421-4[理学—热学与物质分子运动论]