There are many methods for measuring contact angle, such as seat drop method, increasing liquid method, shrinking liquid method, tilting angle method, hanging drop method, fiber adhesion method, bubble capture method, batch fitting method, automatic plate insertion method, and other testing methods.

Seat drop method (static measurement method)

Principle: Drop a liquid droplet vertically onto a solid surface, capture the liquid form through a high-definition camera, and calculate the contact angle.

Operation: Use a 1-100UL syringe to drip the liquid onto the sample. It is recommended to drip the liquid within 5UL or so onto the sample. After the liquid drops onto the sample, take a screenshot with a high-definition camera and use contact angle software to calculate the contact angle with one click.

Requirement: Low equipment requirements, suitable for most flat solid surfaces.

Dynamic measurement method:

Principle: By immersing or pulling out a solid sample into a liquid and measuring the forward and backward angles, it is suitable for evaluating dynamic wettability.

Applicable samples: Samples with uniform shape and surface properties.