Marjiantono, Moch. Krisna Isha (2025) Pengaruh Ekstrak Daun Mangrove (Avicennia marina) terhadap Bioplastik Berbasis Kitosan dari Limbah Cangkang Kepiting Bakau (Scylla serrata). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Limbah cangkang kepiting bakau (Scylla serrata) mengandung senyawa kitin yang dapat diolah menjadi kitosan sebagai bahan dasar bioplastik. Namun, bioplastik kitosan memiliki kelemahan dalam daya serap air, durabilitas, dan fleksibilitas. Penelitian ini bertujuan mengevaluasi pengaruh penambahan ekstrak daun Avicennia marina terhadap sifat mekanis, biodegradasi, dan aktivitas antimikroba bioplastik kitosan. Bioplastik dimodifikasi dengan variasi konsentrasi ekstrak 0%, 0,25%, 0,5%, dan 1% dengan parameter uji meliputi kuat tarik, elongasi, kandungan air, kelarutan, gugus kimia, aktivitas antimikroba, dan tingkat biodegradasi. Hasil penelitian menunjukkan bahwa ekstrak daun A. marina mengandung senyawa flavonoid, tanin, saponin, dan terpenoid. Penambahan konsentrasi 1% ekstrak A. marina berpengaruh terhadap semua parameter yang diuji pada bioplastik berbasis kitosan (p<0,05). Penambahan 1% ekstrak A. marina meningkatkan nilai kuat tarik menjadi 1,143 Mpa, tetapi memberikan dampak penurunan pada nilai elongasi (112,61%), kandungan air (21%), dan kelarutan (36%) bioplastik. Nilai biodegradasi terendah tercapai pada penambahan konsentrasi 1% dengan nilai 78% dan aktivitas antibakteri ditunjukkan dengan peningkatan diameter zona hambat sebesar 3 mm. Dengan demikian, dari semua perlakuan penambahan konsentrasi menunjukkan bahwa pada konsentrasi 1% memberikan peningkatan kualitas bioplastik berbasis kitosan yang lebih optimal.
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Mangrove crab shell waste (Scylla serrata) contains chitin that can be processed into chitosan as a base material for bioplastics. However, chitosan-based bioplastics generally have weaknesses in water absorption, durability, and flexibility. This study aimed to evaluate the effect of adding Avicennia marina leaf extract on the mechanical properties, biodegradability, and antimicrobial activity of chitosan-based bioplastics. Bioplastics were modified with varying extract concentrations of 0%, 0.25%, 0.5%, and 1%, with parameters including tensile strength, elongation, moisture content, solubility, chemical groups, antimicrobial activity, and biodegradability. Phytochemical analysis revealed that A. marina leaf extract contains flavonoids, tannins, saponins, and terpenoids. The addition of 1% A. marina extracts significantly affected all tested parameters (p<0.05). This concentration increased the tensile strength to 1.143 MPa, while it reduced elongation (112.61%), moisture content (21%), and solubility (36%). The lowest biodegradability rate was observed at 1% concentration, with a value of 78%, and antimicrobial activity was indicated by an increased inhibition zone diameter of 3 mm. Overall, the 1% concentration of A. marina extract resulted in the most optimal improvement of chitosan-based bioplastic quality.
Item Type: | Thesis (Other) |
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Uncontrolled Keywords: | Avicennia marina, Bioplastik, Biodegradabilitas, Kitosan, Scylla serrata, Avicennia marina, Bioplastics, Biodegradability, Chitosan, Scylla serrata |
Subjects: | Q Science > QH Biology > QH301 Biology Q Science > QK Botany > QK938.M27 Mangrove forests and swamps Q Science > QL Zoology > QL406.5 Shells Q Science > QL Zoology > QL435.A3 Crustacea |
Divisions: | Faculty of Mathematics and Science > Biology > 46201-(S1) Undergraduate Thesis |
Depositing User: | Moch. Krisna Isha Marjiantono |
Date Deposited: | 01 Aug 2025 01:56 |
Last Modified: | 01 Aug 2025 01:56 |
URI: | http://repository.its.ac.id/id/eprint/124918 |
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