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表面张力中高粘度测量方法

Update time:2017-04-20 11:09:00The number of clicks:5180TimesSize:T|T
此方法是应用在测量中粘度高于500CP.S之液体,测量时间超过5分钟,其测量值才会达到稳定(不包括液体本身随时间而变化的性质)例如甘油、粘胶等。
测试中高粘度液体的方法
此方法是应用在测量中粘度高于500CP.S之液体,测量时间超过5分钟,其测量值才会达到稳定(不包括液体本身随时间而变化的性质)例如甘油、粘胶等。
方法一、手动方式:
(1)挂上白金板并归零;
(2)将QBZY表面张力仪“手动/自动”调至手动状态。即指示灯不亮;
(3)按照下列步骤使样品台上升到接触到白金板:
        A 按“向上”按键,使得样品上升。
        B 等到白金板快刚接触到样品表面时,按“停止”按键。停止样品台的上升。等停止后,白金板应该是接触到样品表面,并且液晶屏显示出的表面张力值是负值。注意,这个接触到的高度即白金板插入样品深约为1mm左右(实际上由于试样的粘度高,白金板开始接触样品时并不能真正插入而是被样品托起)。
(4)取下白金板并润湿5mm高度(不能太高,且如果挂上后显示值超过5mN/m时,请将白金板在样品表面轻刮去直到显示值小于5mN/m)
(5)重新挂上白金板,此时样品会接触到白金板,并出现表面张力现象,完成润湿的过程。
(6)等相对稳定时记取读数。
 
方法二、自动操作:
我们建议客户利用此方法进行操作,但如果对时间要求较高,请按第三种方法进行测试。
(1)挂上白金板并且归零;
(2)取下白金板并润湿5mm高度;
(3)利用面纸轻轻将粘着在白金板上的液体擦掉一些;
(4)重新挂上白金板,此时显示值会大于0,请不要归零,如果显示值大于5mN/m时,请再擦去一些;
(5)按“向上”按键进行测试,记取稳定值。
(Edit:衡正电子)
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