Centrifugation is a method using the centrifugal force to separate contained materials of different specific gravities,it is highly effective and conductible,and is widely utilized in the fractionation of xylem fibers in scientific research.This paper researches the impact of centrifugation on cuticularization features of dissolving pulp fiber,discusses the effects of centrifugation time in the pulp's fiber and cuticularization features including water retention value,pore characteristics,crystallinity,and microstructure.The research shows that the influence of the centrifugation process on fiber features is multi-dimensional.With 7000g centrifugal force and at the time of 20 minutes,the water retention value,average pore size and crystallinity of the fibers reach their peaks,at 78.4%,15.79nm and 81.95%respectively,and fine fibers on the surface have almost disappeared.At the time of 30 minutes,the Young's modulus and hardness of the fibers reach their maximums,at 1.63 GPa and 137.33 MPa respectively.After the drying process,the fiber samples show negligible changes of their water retention value,pore characteristics,crystallinity,and microstructure,however,it is found that centrifugation may trigger the fiber to re-crystalize,but decrease its cuticularized level.
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