A surface tensiometer is an important device used to measure the tension of a liquid at a solid or liquid interface. しかし, a number of factors need to be taken into account when choosing the right surface tensiometer. The selection guide for surface tensiometers is described in detail below.

表面張力計の選択ガイド

初めに, for the choice of surface tension measurement methods, we need to consider the applicability and accuracy of different methods. 現在のところ, the common measuring methods include Du Nouy ring method, Wilhelmy plate method, hanging drop method and falling drop method. For the measurement of interfacial tension between two kinds of non-phase solution, hanging drop method and falling drop method are more common methods. These two methods can effectively measure the interfacial tension when the liquid density difference is large, especially the ultra-low interfacial tension can be measured by the rotating suspension drop method or the suspension drop method.

2番, different measurement methods are suitable for different sample types. 例えば, for high viscosity samples, the traditional Wilhelmy plate method and Du Nouy ring method are not suitable, but the improved Wilhelmy plate rule can measure samples with high viscosity up to 10,000CP.s. 加えて, for samples containing surfactants, the traditional measurement method may cause high measurement results due to the effect of Langmuir monolayer generated, while the improved measurement method can better measure the surface tension of such samples. The sample characteristics involved in different measurement methods need to be understood and distinguished in detail. 例えば, for high viscosity samples, make sure that the instrument you choose can adapt and accurately measure the surface tension of such samples to avoid errors in measurement results. For samples containing surfactants, considering the effect of Langmuir monolayer, it is necessary to select a method that can accurately measure the surface tension of such samples.

表面張力計の選択ガイド

When choosing a surface tensiometer, you also need to consider experimental accuracy and budget. For high viscosity samples, surface tensiometers based on the improved Wilhelmy plate method or the optical suspension drop method are recommended for more accurate measurement results. For the measurement of surfactants, it is recommended to choose a measurement method that can adapt to long-term adsorption in order to obtain more reliable results. 加えて, for the measurement of different sample types, some methods may require a larger volume of samples, requiring special attention to select the appropriate equipment. Instruments made by different manufacturers may differ in quality and accuracy, and prices may vary greatly. したがって, when considering the budget, it is necessary to weigh the experimental needs and equipment performance to select an instrument that meets the budget range and can meet the experimental requirements.

Choosing the right surface tensiometer requires consideration of a number of factors, including the suitability of the measurement method, sample type, experimental accuracy, and budget. Only by considering these factors according to the actual needs and sample characteristics, can the suitable surface tensiometer be purchased to ensure accurate and reliable measurement of the surface tension of different samples.