DE2436599A1 - Interfacial tension and density determination - uses drop breakaway method for liquid media - Google Patents

Interfacial tension and density determination - uses drop breakaway method for liquid media

Info

Publication number
DE2436599A1
DE2436599A1 DE2436599A DE2436599A DE2436599A1 DE 2436599 A1 DE2436599 A1 DE 2436599A1 DE 2436599 A DE2436599 A DE 2436599A DE 2436599 A DE2436599 A DE 2436599A DE 2436599 A1 DE2436599 A1 DE 2436599A1
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DE
Germany
Prior art keywords
weight
interfacial tension
medium
capillary
change
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE2436599A
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German (de)
Inventor
Gammal Tarek Prof Dr Ing El
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE19732354515 priority Critical patent/DE2354515A1/en
Application filed by Individual filed Critical Individual
Priority to DE2436599A priority patent/DE2436599A1/en
Publication of DE2436599A1 publication Critical patent/DE2436599A1/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
    • G01N9/04—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids
    • G01N2013/0241—Investigating surface tension of liquids bubble, pendant drop, sessile drop methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/26—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences
    • G01N9/28—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences by measuring the blowing pressure of gas bubbles escaping from nozzles at different depths in a liquid

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The measurement system for interfacial tension consists of a vessel (1) which contains a specifically heavier phase (4) and a specifically lighter medium (2). A dimensionally defined body (3), for example capillaries, are immersed in the specifically heavier phase (4). Then change of weight of the system during the formation of drops and the breakaway from a capillary with the aid of a device which differentiates the change of weight, is indicated as a function of time. The interfacial tension between two media can be determined with the aid of the breakaway weight (G2) of a drop even without knowing the densities of the media.

Description

Betr.: Meine Patentanmeldung P 2354515.5 hier: Zusatzpatentanmeldung zum Hauptpatent P 235415.5 'Erweiterung des Verfahrens und der Vorrichtung zur Bestimmung der Grenzflächenspannung und/oder der Dichte von flüssigen Medien nach der Tropfenabrißmethode' Das Hauptpatent beschreibt ein Verfahren und eine Vorrichtung zur Messung der Grenzflächenspannung und/oder Dichten von Flüssigkeiten bzw. Schmelzen mit Hilfe einer differenzierten Wägung eines Tropfens während seines Wachstums bis einschließlich dessen Ablösung von einem in seinen Abmessungen definierten Körper, z.B. Kapillare. Die spezifisch schwerere Phase wächst an der Kapillare, die in die spezifisch leichtere Phase eintaucht, zu einem Tropfen aus. Die Gravitationskraft bewirkt dann bei genügender Größe des Tropfens den Abriß von der Kapillare.Re: my patent application P 2354515.5 here: additional patent application to the main patent P 235415.5 'Extension of the method and the device for determination the interfacial tension and / or the density of liquid media according to the droplet break-off method ' The main patent describes a method and a device for measuring the interfacial tension and / or sealing liquids or melts with the help of a differentiated Weighing a drop as it grows up to and including its detachment of a body that is defined in terms of its dimensions, e.g. a capillary. The specific heavier phase grows on the capillary that is immersed in the specifically lighter phase, to a drop. The gravitational force then causes the The teardrop of the capillary.

Die Erweiterung des Hauptpatentes besteht in der Einleitung der leichteren in die schwerere Phase und die dadurch erforderliche Richtungsänderung der Tropfenaustrittsöffnung, z.B. Spitze einer Kapillare nach oben.The extension of the main patent consists in the introduction of the lighter one into the heavier phase and the resulting change in direction of the droplet outlet opening, e.g. tip of a capillary upwards.

Hierbei wird die zeitliche Gewichtsveränderung eines Systems (Fig. 1) verfolgt. Dieses System besteht aus einem Gefäß (1), das eine spezifisch schwerere Phase (4) aufnimmt, in die ein in seinen Abmessungen definierter Körper (3), z.B. Kapillare, eintaucht. An dem in die Phase () eingetauchten Ende des Körpers (3) wird aus der spezifisch leichteren Phase (2) mit vorgegebener Geschwindigkeit ein Tropfen erzeugt. Dabei werden die zwei folgenden physikalischen Größen getrennt voneinander sichtbar gemacht (Fig. 2).The change in weight of a system over time (Fig. 1) pursued. This system consists of a vessel (1), which is a specifically heavier one Phase (4) accommodates in which a body (3) defined in its dimensions, e.g. Capillary, immersed. At the end of the body (3) immersed in phase () will one drop from the specifically lighter phase (2) at a given speed generated. The following two physical quantities are separated from each other made visible (Fig. 2).

1. Das Gewicht der verdrängten, spezifisch schwereren Flüssigkeit G11 das sich proportional zum Volumen des wachsenden Tropfens verhält, 2. das Abrißgewicht G2, das direkt proportional zur Grenzflächenspannung ist.1. The weight of the displaced, specifically heavier liquid G11 which is proportional to the volume of the growing drop, 2. the weight of the breakaway G2, which is directly proportional to the interfacial tension.

Die Berechnung der Grenzflächenspannung erfolgt wie im Hauptpatent.The calculation of the interfacial tension is carried out as in the main patent.

Claims (5)

Betr.: Zusatzpatentanmeldung zum Hauptpatent P 2354515.5Re: additional patent application to main patent P 2354515.5 'Erweiterung des Verfahrens und der Vorrichtung zur Bestimmung der Grenzflächenspannung und/oder der Dichte von flüssigen Medien nach der Tropfenabrißmethode' Patentansprüche: Vorrichtung zur Messung der Grenzflächenspannung, d a -du r c h g e k e n n z e i c h n e t , daß die Gewichtsänderung des Systems (Fig. 1), bestehend aus einem Gefäß (1), das eine spezifisch schwerere Phase (4) aufnimmt, in die ein in seinen Abmessungen definierter Körper (3), z.B. 'Extension of the method and the device for determining the Interfacial tension and / or the density of liquid media according to the droplet break-off method ' Claims: Device for measuring the interfacial tension, d a -du r c h it is noted that the weight change of the system (FIG. 1) consists from a vessel (1) that receives a specifically heavier phase (4) into the one body (3) defined in its dimensions, e.g. Kapillare, eintaucht und einem spezifisch leichteren Medium (2) während der Tropfenbildung und des Abrisses von einer Kapillare mit Hilfe einer Vorrichtung, die die Gewichtsänderung differenziert, als Funktion der Zeit anzeigt (Fig. 2). Capillary, immersed and a specifically lighter medium (2) during the formation of drops and the break-off of a capillary with the help of a device, which differentiates the change in weight as a function of time (Fig. 2). 2. Verfahren nach Anspruch 1), d a d u r c h g e k e n n -z e i c h n e t , daß die Grenzflächenspannung zwischen zwei Medien auch ohne Kenntnis ihrer Dichten mit Hilfe des ermittelten Abrißgewichtes G2 eines Tropfens bestimmt werden kann.2. The method according to claim 1), d a d u r c h g e k e n n -z e i c h n e t that the interfacial tension between two media even without knowing them Densities can be determined with the help of the determined tear-off weight G2 of a drop can. 3. Verfahren nach Anspruch 1) und 2), d a d u r c h g e -k e n n z e i c h n e t , daß das ermittelte Auftriebsgewicht G1 zur Berechnung der Dichte auch ohne Kenntnis des Tropfenvolumens eines Mediums herangezogen wird, wenn die Dichte des zweiten Mediums bekannt ist.3. The method according to claim 1) and 2), d a d u r c h g e -k e n n z e i c h n e t that the ascertained lift weight G1 for calculating the density is used even without knowledge of the drop volume of a medium when the Density of the second medium is known. 4. Vorrichtung nach Anspruch 1) bis 3), d a d u r c h g e -k e n n z e i c h n e t , daß die Gewichtsänderung des Systems Fig. 1, bestehend aus Kapillare (3), spezifisch schwererem Medium (), Gefäß (1) und einem spezifisch schwereren Medium () während der Tropfenbildung und des Abrisses von einer Kapillare mit Hilfe einer Vorrichtung, das die Gewichtsànderung differenziert,als Funktion der Zeit wiedergegeben wird.4. Apparatus according to claim 1) to 3), d a d u r c h g e -k e n n z e i c h n e t that the weight change of the system Fig. 1, consisting of capillary (3), specifically heavier medium (), vessel (1) and a specifically heavier medium medium () during the drop formation and the demolition of a capillary with the help of a Device that differentiates the change in weight, shown as a function of time will. 5. Vorrichtung nach Anspruch 1) bis 4), d a d u r c h g e -k e n n z e i c h n e t , daß die zeitliche Gewichtsänderung des o. g. Systems mit Hilfe einer Waage, eines Verstärkers und eines Anzeigegerätes festgehalten wird.5. Apparatus according to claim 1) to 4), d a d u r c h g e -k e n n notices that the temporal change in weight of the above System with help a balance, an amplifier and a display device is recorded.
DE2436599A 1973-10-31 1974-07-30 Interfacial tension and density determination - uses drop breakaway method for liquid media Withdrawn DE2436599A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19732354515 DE2354515A1 (en) 1973-10-31 1973-10-31 METHOD AND DEVICE FOR DETERMINING THE INTERFACIAL TENSION AND / OR DENSITY OF LIQUID MEDIA IN ACCORDANCE WITH THE DROP DEMOLITION METHOD
DE2436599A DE2436599A1 (en) 1973-10-31 1974-07-30 Interfacial tension and density determination - uses drop breakaway method for liquid media

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732354515 DE2354515A1 (en) 1973-10-31 1973-10-31 METHOD AND DEVICE FOR DETERMINING THE INTERFACIAL TENSION AND / OR DENSITY OF LIQUID MEDIA IN ACCORDANCE WITH THE DROP DEMOLITION METHOD
DE2436599A DE2436599A1 (en) 1973-10-31 1974-07-30 Interfacial tension and density determination - uses drop breakaway method for liquid media

Publications (1)

Publication Number Publication Date
DE2436599A1 true DE2436599A1 (en) 1976-02-12

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DE19732354515 Pending DE2354515A1 (en) 1973-10-31 1973-10-31 METHOD AND DEVICE FOR DETERMINING THE INTERFACIAL TENSION AND / OR DENSITY OF LIQUID MEDIA IN ACCORDANCE WITH THE DROP DEMOLITION METHOD
DE2436599A Withdrawn DE2436599A1 (en) 1973-10-31 1974-07-30 Interfacial tension and density determination - uses drop breakaway method for liquid media

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196615A (en) * 1978-06-29 1980-04-08 Chevron Research Company Method and apparatus for field measurement of interfacial tension between immiscible fluids
US5218841A (en) * 1990-11-05 1993-06-15 The Dow Chemical Company Apparatus and methods for determining liquid/liquid interfacial tension and dynamic interfacial tension reduction
DE4302400A1 (en) * 1993-01-28 1994-08-04 Stephan Mayer Determining contact angle at interface between liquid and solid media

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114383979B (en) * 2022-01-21 2023-05-02 四川大学 Method for measuring surface tension coefficient of liquid by liquid drop method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196615A (en) * 1978-06-29 1980-04-08 Chevron Research Company Method and apparatus for field measurement of interfacial tension between immiscible fluids
US5218841A (en) * 1990-11-05 1993-06-15 The Dow Chemical Company Apparatus and methods for determining liquid/liquid interfacial tension and dynamic interfacial tension reduction
DE4302400A1 (en) * 1993-01-28 1994-08-04 Stephan Mayer Determining contact angle at interface between liquid and solid media

Also Published As

Publication number Publication date
DE2354515A1 (en) 1975-05-07

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