Rachmadani, Erfan Yoga (2026) SINTESIS DAN KARAKTERISASI BIOPLASTIK BERBASIS KITOSAN DENGAN PENAMBAHAN LIGNIN DARI LIMBAH SABUT KELAPA. Undergraduate thesis, Universitas Pembangunan Nasional "Veteran" Jawa Timur.
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Abstract
Bioplastics are alternative materials developed to address the environmental problems associated with conventional plastics, which are difficult to degrade. Chitosan is a promising biopolymer matrix that can be combined with lignin derived from coconut coir as a reinforcing material. Coconut coir contains a relatively high lignin content, making it a potential filler for the production of biodegradable bioplastics. This study aimed to synthesize and characterize chitosan-based bioplastics incorporated with lignin extracted from coconut coir and to investigate the effects of chitosan concentration and chitosan–lignin ratio on the mechanical properties, biodegradability, and water resistance of the resulting bioplastics. The bioplastics were prepared using the solvent casting method with acetic acid as the solvent. Lignin was extracted through a delignification process using NaOH, followed by precipitation using H₂SO₄. The experimental variables included chitosan concentrations of 1.5, 2.0, 2.5, 3.0, and 3.5 g/100 mL and chitosan–lignin volume ratios of 100:0, 90:10, 80:20, 70:30, and 60:40. The results showed that lignin was successfully isolated with an efficiency of approximately 77% and could be incorporated into the bioplastic matrix. The addition of lignin affected the characteristics of the bioplastics, improving their mechanical strength up to a certain concentration while reducing film homogeneity and increasing color opacity as the lignin content increased. Furthermore, increasing the chitosan concentration tended to enhance the tensile strength and elasticity of the bioplastics. The biodegradation test demonstrated that the resulting bioplastics were capable of degrading, supporting their potential as environmentally friendly materials. Overall, the combination of chitosan and coconut-coir-derived lignin has considerable potential for producing biodegradable bioplastics with desirable properties, with an optimum composition providing the best overall performance. The utilization of lignin from coconut coir also provides added value by reducing biomass waste and supporting the development of sustainable and environmentally friendly materials.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology T Technology > TP Chemical technology > TP155 Chemical engineering |
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| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Erfan Yoga | ||||||||
| Date Deposited: | 01 Sep 2026 02:58 | ||||||||
| Last Modified: | 01 Sep 2026 03:05 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/59012 |
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