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Investigation of Carbon Fiber Wetting Process by Wilhelmy Method and Force Analysis Method

Carbon fiber dynamic wetting measurement system is established based on DCAT 21 tensiometer. The same carbon fiber wetting property are measured by Wilhelmy method and based on force analysis method, which obtained the contact angle is 78.15°and 81°respectively. The results show that complicated preparation exists on the Wilhelmy method, as well as soft fiber is not suitable by this process. However, force analysis method can solve this problem, measuring speed of this method is quickly and applicable. Keywords: contact angle; Wilhelmy method; carbon fiber; wetting; force analysis method