FANGRUI instrument QBZY-3 Surface Tensiometer platinum plate/ring method, range 0~200mN/m

Introduction

Surface tension is an essential factor that determines the properties of liquids such as solubility, wettability, foamability, coating and permeability. Surface tension analysis of a given liquid is often performed to study the physical behavior of that liquid relative to other liquids or solids. And this kind of research is the basic means of quality control in the process of industrialization. Fangrui QBZY-3 Surface Tensiometer is a professional-grade interfacial chemical analysis instrument specially developed to meet the user's needs for R&D and high-precision quality control in the process of interfacial chemical testing.

QBZY-3 Surface Tensiometer has won a new national patent, patent number: 2011200652242

Features

1) Platinum plate and platinum ring are used in combination with two test methods;

2) Fully automatic measurement, when the platinum plate is tested, the displayed value is the surface tension value;

3) When using the platinum ring test method, the display value automatically locks the maximum force value of the sample, and then calculates the surface tension value through the supplied calculation software or the data processing software is automatically calculated by the computer;

4) Platinum ring size: wire radius is 0.185mm, ring radius is 9.55mm, ring circumference is 60mm;            

5) Fully automatic measurement to avoid human operation error;

6) Automatic correction of the full scale, accurate and reliable data, excellent repeatability;

7) One-key clearing, instantaneous, zero position is stable and no drift;

8) Adopt international professional lifting platform drive technology, no vibration and noise;

9) The instrument has a reasonable structure, works independently, does not need any additional equipment (such as external computers, etc.), and can also be equipped with computers for data processing;

10) When using platinum plate, the surface tension of the liquid can be measured in real time, which is very practical for measuring samples containing surfactants or volatile substances, whose surface tension will change with time (data processing software is selected, the test curve can be recorded in real time, and the details of the change can be clearly obtained);

11) When using platinum plate test, it can automatically test the surface tension of medium and high viscosity liquid samples;

12) Both test methods can measure the interfacial tension between impartite mixed liquids, such as: oil/water interface;    

13）Data processing software: automatically collect test curves, and the curves can be automatically enlarged, accessible, and printable. It can compare multiple test curves, and automatically calculate the surface tension value when using the platinum ring method; 

14）Accuracy correction function: with 2 times of distilled water and pure ethanol as the standard, the overall test error of the instrument is automatically calibrated, which can ensure that the instrument is in the accurate state of the factory for a long time; 

15）Automatic temperature compensation function: with 2 times of distilled water and pure ethanol as the standard, the test value of the sample at different temperatures is automatically summarized to 20°C;

16）A variety of temperature control options are included to meet different test requirements;

Instrument structure

Component description: This Surface Tensiometer is mainly divided into three parts according to the operation process

First, the sensing part mainly refers to the upper part of the instrument;

Second, the control part, mainly refers to the middle and lower part of the instrument;

Third, the display and button part mainly refers to the lower part of the instrument.

The items listed in the above parts refer to:

1. Surface Tensiometer main unit;

2. Adjust the feet horizontally;

3. Set value display

4. Spirit Level (Blister Calibrator)

5. Switch, tare weight, correction key, mode key

6. LCD display (showing the measured value)

7. Main control buttons

8. Automatic lifting of the sample stage

9. Hook and platinum plate

10. Plexiglass doors

11. Thermostatic water pipe holes

Detection principle

Platinum plate method

When the sensing platinum plate is immersed in the liquid to be measured, the surface tension around the platinum plate will be affectedThe surface tension pulls the platinum plate down as much as possible. When the surface tension of the liquid and other related forces are equal to the equilibrium forceWhen it is weighed, the platinum plate stops immersing into the liquid inside. At this point, the instrument's balance sensor measures immersioninto depth and converts it into the surface tension value of the liquid.During the specific test,The test steps of the platinum plate method are as follows:

(1) Gradually immerse the platinum plate in liquid;

（2）When immersed in the liquid surface, the equilibrium value is sensed by the sensor;

(3) Convert the perceived equilibrium value into a surfacetension value and display.

Platinum Ring Law

Due to its widespread use in du Nou tensiometers, this method is also known as the du Nouy method, and is therefore operatedIt is widely used for its simplicity. The platinum ring method is called because a ring forms between the test part and the liquid sampleAnd get.The measurement method of the platinum ring method is:

(1) Gently immerse the platinum ring in the liquid;

(2) About 5mm~6mmThe left and right sides then slowly raise the platinum ring upwards, i.e. the liquid level is relatively lower, so that a one forms underneath the platinum ringliquid column, and eventually separated from the platinum ring. The platinum ring method is to sense a maximum value, and this maximum value is formed inThe platinum ring will be separated from the liquid sample. The accuracy with which this maximum value translates into a surface tension value depends on the liquidViscosity.

Scope of application

- Ink, ink, paint industry: analysis of wettability of printing/coating processes, product development and quality control

- Printing industry: development and wettability analysis of screen cleaning solution, wettability analysis of thin film

- Film industry: wettability analysis, quality control

- Detergent industry: Analyze the absorption rate and properties of surfactants, and study the appropriate concentration

- Chemical Aid Industry: Research on aggregation and diffusion behavior

- Cosmetics industry: Analysis of dispersion, stability and wettability of emulsions or suspensions

- Electroplating industry: Analyze the surface tension of electroplating baths and carry out quality control

- Pesticide industry: additive development, formulation, wettability analysis

- Nanofiber, powder research: fiber contact angle/hydrophilic angle analysis, dynamic contact angle analysis

- Petroleum industry: tertiary oil recovery interfacial tension characterization, oil flooding quality control, degradable composition analysis

- Textile industry: contact angle analysis, dye wettability, surface tension, adhesion analysis

Food industry: surface tension and wettability analysis, surface tension and cleanliness analysis of canned coatings

- Power industry: surface tension analysis of transformer oil and insulating oil, fiber bundle contact angle analysis

Product display diagram

Host x1, platinum sheet x1, forceps x1, calibrated block x1, extension hook x1, Glass culture dish x2, tray x1, alcoholburner x1, power cord x1, manual, certificate of conformity, warranty card x1

[Note] Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.