As we all know, nano-materials science and engineering has become a worldwide hot topic. In the study of surface modification of nano-materials, often involves wetting contact angle of this concept. The so-called contact angle refers to the drop a droplet on a solid horizontal plane, on a solid surface solid - liquid - gas-phase junction point, the gas - liquid interface and solid - liquid interface of the two tangents when the folder in which the liquid phase the angle formed.
SI-CAM2000CS1 contact angle measuring instrument for measuring the contact angle of a liquid on a solid, that is a liquid wet ability on solid ,can also measure the contact angle of the liquid external phase. The instrument can measure a variety of liquid contact angle of various materials, such as bulk materials, fiber materials, textile materials, powder samples after making into the tablet can also be measured. At the same time this series of instruments can measure and calculate the surface / interfacial tension, CMC, the shape of the droplet size, surface free energy.
A. Equipment module
1. USB digital CCD camera   1pcs
2. Continuous variable power optical system   1unit
3. The peristaltic pump   1pcs
4. Manually CCD tilt platform 1 unit
5. Image Analysis Measurement System Application Software 1 set
6. Instructions and Operation Manual electronic edition   1 set
7. Room temperature -100 °   heating platform(optional)
8. ± 15 ° sample swing table (optional)
9. 360 ° vertical rotating platform (optional)
10. 360 ° horizontal rotation platform (optional)
11. The fiber holder, stretch fabric frame (optional)
12. The card inserting unit (optional)
13. Stop bubble device (optional)
B. Parameters
1. Measure static / dynamic contact angle
a) The amount of the Supreme Court (3-point method to do flat, four-point method to do an uneven surface)
b) 5-point method of curve fitting (do advancing angle, receding angle)
c) Protractor method (tangent method)
2. Measure the surface tension (hanging drop method)
3. Observe the shape of a droplet size measurement (hanging drop method)
4. Calculate the surface free energy (Owens two-calculation method)
5. Measurement:
a) Flash frozen screenshot
b) Interval Shooting Pictures (1-3600 seconds interval shooting storing an image)
c) Continuous shooting pictures (25 frames per second high-speed photography)
6. The contact angle measurement range: 0-180 °
The image magnification: 50pixel / mm ~ 318pixel / mm
8. Accuracy: 0.1 ° or 0.5 ° (two tranches optional)
9. The size of the fixed sample stage, the sample can be tested: 100 × 100mm2
10. The sample stage travel distance: 20mm
11. Fixed sample platform: move around manually, 60mm stroke
                        Move up and down manually, 50mm stroke
12. Lens: move back and forth manually, 40mm stroke
C. Features
1. The use of computer multimedia technology, optical system and CCD camera combine to make an image of the droplet clearly displayed on the computer screen, the image is stored in an instant for the next measurement, to avoid measurement failure due to liquid evaporation.
2. With instant freeze, automatic continuous photography, high-speed photography three kinds of shots the way, even the volatile liquid can also ensure accurate measurement. Meanwhile, outside the tangent is subjective factors affect the biggest problem, SI-CAM2000 series contact angle measurement of the geometric operations being done in software, the contact angle is no longer human judgment.
3. The overall structure of the instrument, including the four-dimensional movement of the adjustment mode.
D, Requirements for computer
SI-CAM2000C1 contact angle measuring instrument must combine with a computer .If users buy computers by themselves,, the configuration requirements are as follows: Requires 32-bit operating system, RS232 serial port, USB2.0 interface.
Software functions
1. Video capture and automatic devices Control
2. Hypsometry measuring contact angle of the level or an uneven surface.
3. Protractor measuring the contact angle.
4. The five-point measurement fitting advancing angle, receding angle, roll angle, the contact angle.
5. The automatic image analysis method for measuring the contact angle.
6. The hanging drop method measuring the liquid surface tension.
7. Automatic fast memory (high speed photography) when loading.
8. The freedom to go along continuous shooting interval.
9. The two-component method to calculate the solid surface energy of three-liquid method.
10. Database Management.