Exploring the Potential of Natural Ingredients: Bioplastics from Cornstarch and Coconut Shell Cellulose
DOI:
https://doi.org/10.19109/85g1x884Keywords:
bahan alam, Agropolimer, Chitosan, Bioplastic, Coconut shellAbstract
This study aims to develop cornstarch-based bioplastics with the addition of coconut shells as a natural reinforcing material. Coconut shells first undergo a delignification process using NaOH and bleaching with H₂O₂ to remove lignin and increase cellulose content. The characterization results using FTIR show that the cellulose structure is maintained, with an increase in hydroxyl groups that play an important role in the formation of the bioplastic structure. Bioplastics were then synthesized with three different formulations based on variations in the amount of coconut shells and tested for mechanical properties and water absorption. The test results showed that increasing the amount of coconut shells increased tensile strength, with the highest value of 6.75 MPa observed in the third formulation. However, the first formulation, with 2.5 grams of coconut shells, showed the best water resistance, with an average absorption of 37.21%. All formulations met the JIS standard for edible films. This study concludes that coconut shells have the potential as a reinforcing material in environmentally friendly bioplastics.
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