Development of Binderless Fiberboards from Steam-exploded and Oxidized Oil Palm Wastes

Binderless fiberboards were made from oil palm (Elaeis guineensis) empty fruit bunches with two treatments: steam explosion and Fenton reagent oxidation.Fiberboards were prepared with a targeted density of 1.20 g/cm 3 and a thickness of 4 mm.A factorial experimental design 2 2 with two center repetitions and one repetition was applied for each treatment.The oil palm waste was oxidized with Fenton reagent using a H 2 O 2 /Fe 2+ ratio of 2%/0.2% to 4%/0.4% and a pressing temperature of 170 to 190 °C.Steam explosion was carried out at a severity factor of 3.5 to 4.0 at the same pressing temperature.Both treatments were examined under two major response variables: mechanical properties (modulus of rupture, MOR, and modulus of elasticity, MOE) and physical properties (thickness swelling, TS, and water absorption, WA).Steamexploded samples developed better physico-mechanical properties than those that underwent Fenton reagent oxidation.The best results were obtained from fiberboards treated with the highest steam explosion design conditions (severity 4 and pressing temperature 190 °C) to give optimum values of MOE 3100.09MPa, MOR 28.49MPa, TS 11.80%, and WA 22.74%.Binderless fiberboards made from steam explosiontreated pulp satisfied favorably well the Colombian Standard NTC 2261.