Surface tension is a phenomenon of the interaction between liquids and solids, and it has important applications in many fields. In order to accurately measure surface tension, a variety of detection methods have been developed. This article will introduce three commonly used surface tension detection methods, which are peeling inspection using BOPP single-sided tape, testing with a dyne test pen, and self-preparing surface tension test solution.
1. BOPP single-sided tape peeling test method
This method uses a BOPP single-sided tape to assess the surface tension of the film to be tested. The operation method is to stick the BOPP single-sided tape to the surface of the film to be tested, then compact it, and finally tear it off quickly. If the surface tension of the film meets the requirements of use, it will require some force to peel off, and the sound will be low; conversely, if the surface tension is low, the tape will peel off easily, accompanied by a distinct "rustling" sound.
2. Dyne test brushwork
This method measures the surface tension of the film by using a dyne test pen. When the surface tension value of the film meets the requirements, the liquid marks where the test pen is stroked are uniform and there are no breaks, and the test liquid will not shrink; otherwise, the test liquid will shrink. If one part of the area shrinks and the other part does not, it means that the film treatment is not sufficient. For different materials, it is necessary to choose a test pen of appropriate specifications.
3. Self-preparation surface tension test solution method
This method involves preparing the surface tension test solution by yourself, and using a cotton ball dipped in a small amount of the test solution to apply it to the surface of the film to be tested. The judgment method is similar to the Dyne test pen method. The uniform liquid marks applied without breaks indicate that the surface tension value meets the requirements. It should be noted that the treated film should not be placed for too long, because the longer the time, the surface tension value will gradually decrease. If it needs to be stored for a long time, the initial surface tension value when processing the film should be slightly higher.
Taken together, these three commonly used surface tension detection methods provide researchers and engineers in different industries with the means to accurately assess the properties of the liquid-solid interface. Choosing the right method depends on the specific application needs and experimental conditions, and the application of these methods will help optimize processes such as liquid wettability, droplet stability, and material coating.
