| Abstract:In this paper, polyacrylonitrile carbon fibers with length of 2 mm, 3 mm and 5 mm were used as the research object, surfactant, dispersant PEO and PAM were used as dispersing additives, and the effects of surfactant, fiber length and consistency, the type, ratio and dosage of dispersant on the dispersibility of carbon fibers in water were studied. The results showed that the length and consistency of carbon fiber were important factors affecting the dispersion of carbon fiber; When the consistency of 3 mm carbon fiber reached 0.1111%, the addition of dispersant was 0.0059%, and PEO∶PAM=3∶1, surfactant was 0.025%, the carbon fiber reached the best dispersion state, and the settling time reached 9 min. At the same time, the pretreatment of surfactant could help the fibers soak into water faster and accelerate the dispersion speed． |
