Abstract
ABSTRACT Research was conducted into the effect of a chelator-mediated free radical treatment (CMT) on drainage rate, strength properties, optical properties, and fiber morphology for a fully bleached hardwood kraft pulp. The nature of the pulp furnish, specifically the fines and microfibril content, and its gross fiber characteristics, had a significant effect on the final fiber and paper properties. This was primarily due to an increase in the specific surface area of small fibers and fines in the beaten pulp. Treatments with high concentrations of Fenton reagents displayed severe damage to the cellulose fibers in both the beaten and unbeaten pulp. However, under relatively mild reaction conditions, fiber surface fibrillation of the unbeaten virgin fibers occurred. This observation was confirmed through results showing increased pulp tensile strength after treatment. *This is paper 2582 of the Maine Agricultural and Forest Experiment Station.
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