仪器资讯
本视频中演示了采用Young-Laplace方程拟合时各家接触角仪公司软件的区别。从测试结果来看，接触角变化范围从103－105度之间，属于一个合理的变化范围。这种变化由各种因素造成，如水的挥发等。
另可参考如下资料，我们发现国外的部分生产厂的接触角仪软件使用Young-Laplace拟合时，90－140度时，测值偏大5度，而大于140度时，测值偏大约10度。
Wemeasuredcontactangleofsamesamplewith4differentsoftwarefromKruss,Dataphysics,BiolinandKINO.AndwemeasuredcontactangleofsamplebyBiolin'ssofware-OneAttensionV2.4atfirstbecauseonlythissoftwarecannotimportimagesintosoftwareandcalculatecontactangleforimportedimage.OthersofwaressuchasDSA1.92andDSA3.0fromKruss,andSCA202fromDataphysicsandCAST3.0fromKINOcanallimportimageintosoftwareandcancalculatecontactangleusingdifferentmethodsuchascirclefittingmethod,ellispefittingmethodandYoung-Laplaceequationfittingmethod.Atthisarticle,wejustshowyouthecalculatedresultbydifferentcompany'ssoftware.Comparisonofmeasuredresultmaybehassomeexisteddeviationduetoourmisoperation.Youcancontactustoobtaintherecordedvideoformeasuringprocessofcontactangle.Andfromthecomparisonofmeasuredcontactanglefromdifferentdropshapesoftware,maysafelydrawaconclusionthat:1,Whencontactanglebelow3°: anti-dazz领screenmustbeusedtogetsharpdropshapeandwhenusingYoung-Laplaceequationfittingmethod,onlysofwarefromBiolin(OneAttensionV2.4)isfailuretofittingthedropshapeandgetaacceptablecontactangle.2,Whenthereexistssomenoisepointsorpoorbackgroud,tangentmethodbasedonpartsofdropprofilewill failuretofittingthedropshapeandgetaacceptablecontactangle.3,Whencontactanglebetween90°-140°,calculatedcontactanglebasedonYoung-LaplaceequationfittingmethodfromdropshapeanalysissoftwarefromKruss,DataphysicsandBiolinwillbelargerthanothermehodsuchascirclefittingandellispefittingabout3-5° whencirclefittingorellispefittingcanfittingthedropshape.And alsothisvaluebasedonYoung-LaplaceequationfittingmethodislargerthanADSA-RealDropbasedmethodfromKINOabout3-5°.4,Whencontactanglelargerthan140°, calculatedcontactanglebasedonYoung-LaplaceequationfittingmethodfromdropshapeanalysissoftwarefromKruss,DataphysicsandBiolinwillbelargerthanothermehodsuchascirclefittingandellispefittingabout8-10° whencirclefittingorellispefittingcanfittingthedropshape.And alsothisvaluebasedonYoung-LaplaceequationfittingmethodislargerthanADSA-RealDropbasedmethodfromKINOabout8-10°.5,CalculatedontactanglesbydifferentmethodfromKINO'ssofwareCAST3.0are almostkeptsamewhenbothofthemfittingdropshapecorrectly. Pleasebenotedthat,1, Abasicprincipleiscontactangleiscalculatedfromtangentatcontactpointorcurveradiusatcontactpoint.Andwhenfittingdropprofilewithsomeequationofcurve,ifresultoffittingisgood,calculatedcontactanglewillbealmostsame.Inotherwords,Young-Laplaceequationcanbeusedtocalculatecontactanglewhendropshapecannotfittingwithcircleequationduetoeffectofgravity.Butifweusedotherequationofcurveandfittingitcorrectly,theresultwillbekeptalmostsame.2,Rednumbermeansitisfailuretofittingdropprofilewithcurrentmethod.And"—"meanscurrentmethodcannotcalculateanyresultautomatically.仪器网-专业分析仪器服务平台,实验室仪器设备交易网,仪器行业专业网络宣传媒体。
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