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    • 5. 发明公开
    • Methods and device for fast creation of fluid interfaces and use of this device for determination of liquid-liquid and liquid-gas interfacial properties
    • 方法和用于生产液体环接口装置,以及用于确定所述液 - 液和液 - 气界面性质使用该装置的
    • EP2072996A2
    • 2009-06-24
    • EP08018567.1
    • 2008-10-23
    • Krüss GmbH Wissenschaftliche Laborgeräte
    • Ivanov, Ivan B.Marionova, Krestanka G.Vulchev, VassilDimitrova, Dora T.
    • G01N13/02
    • G01N13/02G01N2013/0241G01N2013/0275
    • Summary of the invention
      The invention proposes new methods for fast fresh surface formation of a drop or bubble of a test fluid and a device to realize the new methods to determine the dynamic or equilibrium surface/interfacial tension (ST/IFT) of this liquid. The methods are implemented by means of a single device which is used both for dynamic and equilibrium measurements of the ST/IFT. Depending on the method, the determination of the ST/IFT can be performed either by Axisymmetric Drop Shape Analysis (ADSA) or Capillary Pressure Method (CPM) or both. In addition, with this device the Drop Volume Method and Stopped Jet Method can be realized, which has been modified and improved with the proposed invention in comparison with the known methods. The combination of several methods for creating a fresh surface and of two techniques for determining ST/IFT in a single device allows choosing the most suitable method for a given fluid system considering the system properties and desired time range.
      The proposed device consists of the following components:
      - a capillary tube (5), to which tip a drop/bubble is attached (1) and which is connected to a pressure detector (12) and to an injection module (6), which controls the fluid (gas and/or liquid) in the inner volume;
      - an optical imaging system, typically comprising illumination source (7) optical lenses (8), and image detection system (9), e.g. video camera and video A/D-converter;
      - electronics (10) and computer (11) with software to control the device, to analyze drop shapes and pressure signals, if needed, and to determine the ST/IFT.
      - a glass cuvette (13) with optical windows, used as a container for the outer fluid phase (2).
    • 发明概述本发明提出了几乎新鲜表面形成的测试流体的液滴或气泡和设备来实现该液体的新方法,以确定的矿井动态或平衡表面/界面张力(ST / IFT)的新方法。 的方法是通过单个装置来实现所有其既为ST / IFT的动态和平衡测量中使用。 根据该方法中,ST / IFT的确定可以通过轴对称滴形分析(ADSA)或毛细管压力法(CPM)或这两者来执行的任一。 此外,与此设备的滴体积法和停止喷射法可以实现的,其已经被修饰,并与所提出的发明改进的与已知的方法相比。 的几种方法用于产生新鲜表面和两种技术用于确定性采矿ST / IFT在单个装置中的组合允许选择用于考虑系统性能和期望的时间范围内给定的流体系统中的最适合的方法。 所提出的装置besteht以下几部分组成: - 一个毛细管(5)中,向其中小费滴/气泡附着(1)和所有连接到的压力检测器(12)和至注射模块(6),其 控制流体(气体和/或液体)进入内部容积; - 在光学成像系统,典型地包括照明源(7)的光学透镜(8),和图像检测系统(9),E. G. 视频摄像机和视频A / D转换器; - 电子装置(10)和计算机(11)的软件,以控制该设备,以分析液滴的形状和压力信号,如果需要的话,和确定性矿ST / IFT。 - 玻璃比色皿(13)的光学窗口,用作外流体相(2)的容器。