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Interface Chemical Analysis Based on Drop Shape Analysis CAST3.0 & CAST4.0

Model

TX500H

1.General Specifications

Measuring Range of Interface Tension

10²- 10^-6mN/m

Measuring Range of Contact Angle

0-180°

2.Hardware Specifications

Zoom Range of Microscope Lens

0.7-4.5X / （optional with 9X、18X）

Camera Resolution

752*480（cameras with 130M、300M、500M resolutions are available）

Video Capture System

Video device of USB 2.0 / PCI video capture card and camera with 1394 port are optional available

CCD camera  with speed of 87-340FPS

(60FPS, 100FPS and 300FPS are optional available)

Lens Control

X Axis: software-controlled drop image finding and FOV tracing

Y Axis: Focus adjustment

Z Axis: Drop imaging position adjustment

R Axis: High-precision integral rotary positioning stage with lock function; Drop movement controlling

Tilt control of camera lens

Control Range of Motor

0-15000 RPM

Motor Type

Servo control system, CVT of down to 1RPM

Control Accuracy of Motor

±3RPM

Control Mode

 Encoder with 500 lines

Heating System

Gas-thermal

Control Range of Temp.

Ambient temp. +5 - 100℃

Control Accuracy of Temp.

±0.5℃

Heating Mode

Built-in full-surface radiator heating by electrical heating rod

Temperature Sensor

Digital semiconductor temperature sensor with self-calibration from USA     accuracy：0.0625℃

Temperature Control Range if with Water  Circulator

0-100℃

Sample Tube

Sample tube made of quartz glass with inner diameter (ID) of φ6mm、φ4mm、φ2mm

Self-seal Sample Tube

Inner diameter of 2mm, both ends opening

Standard Wire

Two-directional (horizontal and vertical) calibration (measurement ruler is optional）

Fixation Method of Sample Tube

Both ends fixing

Communication Port

General port of USB2.0

Levelness Control

Four-foot levelness control, sample table rotation, and horizontal control of lens

3.CAST?4.0-software of spinning drop interface tensiometer

Calculation of Interface Tension

1. Automatically measuring upper and bottom boundary lines, calculating distance between them, then calculating IFT, and finally exporting all data into database for management.

2. The measured data can be manually adjusted, and the operation traces will be saved.

3. One-to-one correspondence between measured data and picture

Calculation Method

Full-automatic,  and secondary manual adjustment with its trace recorded

Magnification Calibration

Calibration of horizontal and vertical magnification

Database Management

Historical data can be regularly saved and managed by database. One-to-one correspondence between data and image; querying, adjustment, operation traces recording. as well as Excel and BMP exporting

Software Control Function

Temperature, high speed motor,  X axes (tracking images of liquid)

Capture Method

Single capture, continuous capture, capture with 25-60 pictures per second or timing capture, such as 20-minute capture interval and  2-hour total measurement time

4. Software specifications of optical contact angle

Sample Stage

1. Z-direction travel distance: 50mm, accuracy: 0.01mm;

2. Horizontal adjustment;

3.Size of sample table: 50*50mm

Dosing System and Its Control

1.High-precision manual syringe pump, accuracy: 0.02uL (the software-controlled is optional)

2. Disposable needle of 0.5mm, 0.3mm, stainless, PTFE, etc.

3. Sampling system control XYZ 12.5mm, accuracy: 0.01mm

Rotary Stage

Integral rotary stage, for measurement of roll off/advancing/ receding contact angle with curve fitting function of CAST®2.0.

5. Software specifications of optical contact angle

Drop Shapes

Pendant drop, sessile drop, captive bubble, tilted plate, spinning drop

Measuring Method

θ/2, circle fitting, ellipse fitting, RealDrop?, curve ruler, spline, Young - Laplace equation based fitting method

Measuring Functions

measurement of static contact angle , dynamic contact angle(advancing/receding contact angle, time-dependent contact angle), surface free energies(surface tension) of solid, spinning drop surface/ interface tension, WBA

Surface Free Energy of Solid

Exclusively provided methods for estimating surface free energy, such as Equation of State (Neumann et al.), Good-Girifalco, Owen-Wendt-Rabel, Simple Fowkes, Extended Fowkes, WU method 1-2, Schultz method 1-2, Acid-base (Van OSS & Good), Jhu, and Zizman Plot (critical surface tension) method, can be used to measure free energy and its distribution (dispersive force, polar force and hydrogen bond value, and Lewis acid-base, etc.) of low/high energy solid surfaces.

Software Triggering

Unique dual-software triggering technology for measurement of first-time-point contact angle detection in analyzing powder, paper and other hygroscopic materials and also for the whole-process shooting of small contact angle measurement.

Database Management

Historical data can be querying, Excel exportable and secondary modification.