Fateha, Salesa Amilia (2026) SINTESIS DAN KARAKTERISASI BIOPLASTIK BERBASIS KITOSAN DENGAN PENAMBAHAN LIGNIN DARI LIMBAH SABUT KELAPA. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Bioplastics are alternative materials developed to address the issue of conventional plastic waste, which is difficult to degrade in the environment. One material with potential for this application is chitosan, used as a biopolymer matrix combined with lignin derived from coconut coir waste as a reinforcing agent. Coconut coir contains significant amounts of lignin, making it a promising filler for the production of biodegradable bioplastics. This study aimed to synthesize and characterize chitosan-based bioplastics incorporating lignin from coconut coir and to analyze the effects of varying chitosan concentrations and chitosan-to-lignin ratios on the bioplastics' mechanical properties, biodegradability, and water resistance. Fabrication was carried out using the solvent casting method with acetic acid as the solvent. Lignin was obtained through a delignification process using NaOH followed by precipitation with H₂SO₄. The variables included chitosan concentrations of 1.5, 2, 2.5, 3, and 3.5 g/100 mL, and chitosan-to-lignin volume ratios of 100:0, 90:10, 80:20, 70:30, and 60:40. The results demonstrated that lignin was successfully isolated with an efficiency of approximately 77% and could serve as an additive in bioplastics. The addition of lignin influenced the bioplastics' characteristics: it enhanced mechanical strength up to a certain point but reduced homogeneity and increased the film's darkness as lignin concentration rose. Additionally, increasing the chitosan concentration tended to improve the bioplastics' tensile strength and elasticity. Biodegradation test results indicated that the resulting bioplastics were capable of degrading, thereby aligning with eco-friendly principles. Based on the research findings, it can be concluded that a combination of chitosan and lignin derived from coconut husk has the potential to produce biodegradable bioplastics with favorable properties, and that there is an optimal composition yielding the best performance. Utilizing lignin from coconut husk waste also provides added value by contributing to biomass waste reduction and the development of eco-friendly materials.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | SALESA AMILIA FATEHA | ||||||||
| Date Deposited: | 01 Sep 2026 03:36 | ||||||||
| Last Modified: | 01 Sep 2026 03:36 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/59170 |
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