Coconut-Husk for Pulp and Paper
Posted byPaper is traditionally defined as thin mass of felted sheet separated from the water suspension of prevalently cellulose-based pulp fibers on a fine screen, followed by sheet forming, compression (calendering), drying, and finishing-actions. In relevant, this study aims to make pulp for paper from coconut (Cocos nucifera L.) husk using soda-pulping method, determine the best condition for NaOH concentration in manufacturing pulp from coconut husk fibers, determine the best condition for tapioca and kaolin concentration in paper-sheet forming the corresponding pulp, and perform calculation of biomass conversion.
NaOH concentration used were 10% and 15%. Tapioca concentration varied at 0% and 5%, while the concentration of kaolin employed at 0% and 10%. The parameters that examined on pulp and paper covered pulp yield, alkali consumption, kappa number, real grammage, water absorption (Cobb method), tensile strength (steady-elongation velocity method), and tear strength (Elemendorf method). Analysis on those examined data employed a completely experimental design, followed by Tukey test (α = 0.05).
Results of ANOVA followed with Tukey test revealed that the highest alkali consumption occured at 15% NaOH and the highest pulp yield was obtained at 10% NaOH. Meanwhile, kappa number of pulp and water absorption of paper were not significantly different between the treatments (i.e. NaOH, tapioca, and kaolin concentrations). The maximum tear index and tensile index obtained from the pulp with 15% NaOH, addition of 0% kaolin and 5% tapioca (N15K0T5); and from the pulp with 10% NaOH, and the correspondensing kaolin and tapioca additions (N10K0T5).
The use of coconut-husk from 1 Ha coconut-field for paper manufacture can save 2.02 tons (5.05 m3) of wood per year, hence avoiding the cutting of 22 wood trees (0.02 ha of forest) per year, thereby affording carbon sink at 1.01 tons of C and concurrently enabling the absorption of 0.76 tons CO2 per year from the air.
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