The Effect Of Chemical Treatment On The Pulp And Paper Properties Of Banana (Musa Sp.) Stem And Its Effect On Blending With Secondary Fibers
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Date
2015-08
Authors
Mahamud Pauzi, Farhana
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Abstract
Banana (Musa sp.) stem is studied to be used as the alternative to replace wood for the production of pulp and paper. Semichemical pulping of banana stem involved three pulping variables (temperature: 30–90°C, time: 25-75 min, alkali concentration: 5-15%) in chemical treatment. The experimental design of semichemical pulping was computed and the response of pulp and paper properties to the pulping variables was analyzed using a central composite design (CCD) of response surface methodology (RSM). The aim of the study is to observe the influence of chemical treatment in the semichemical pulping of banana stem on the yield, kappa number, tensile, burst, tear, fold and brightness of pulp and paper. The alkali concentration had a predominate effect on banana stem pulp and paper properties which improves the pulp yield, tensile strength, burst strength and folding endurance. The cooking temperature took the second place and the treatment time seems to have low priority. By applying the desirability function method, the optimal pulping conditions were found to be a treatment time of 66 min, cooking temperature of 61 °C, and alkali (NaOH) concentration of 15% (w/w basis raw material). The optimal pulping resulted in a decrease of yield by 20% when compared to the predicted value. The resulting paper properties value were approximately 15-16% lower than the predicted value. The difference of observed and predicted values of paper properties was considered acceptable. Blending method is used to recover the
lost potentials of kraft liner pulp by using semichemical banana stem pulp as the upgrading strength material. The addition of 20% virgin pulp to the secondary pulp is sufficient to completely restore the tensile strength, burst strength and folding endurance of the paper. The optimum ratio of blending recycled kraft line pulp and semichemical banana stem pulp point to 60:40 in order to have good paper properties.
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Banana (Musa Sp.) Stem