Water-sorption kinetics in oil palm fibers

Oil palm fibers represent a very abundant and natural resource for raw mate rials that can be efficiently utilized as reinforcement in polymers. The so rption characteristics of two types of oil palm fibers-oil palm empty-fruit -bunch (OPEFB) fiber and oil palm mesocarp fiber-in distilled water, minera l water, and water containing salt at four different temperatures were inve stigated. The uptake of water decreased with an increase in temperature. Th e OPEFB fiber showed higher sorption than the mesocarp fiber. This was due to the uptake associated with the capillary action in the OPEFB fiber. The thermodynamic parameters of the sorption process were calculated. (C) 2001 John Wiley & Sons, Inc.