Electronic Theses and Dissertation

Dian Nur Fathinah. (2025). Pengaruh Penambahan N-Doped Carbon Quantum Dots Terhadap Karakteristik Sifat Termo-Mekanik Bionanokomposit Film Pati Aren, Kitosan, dan Ekstrak Bunga Telang. [Skripsi. Universitas Syiah Kuala]. Dibawah bimbingan Prof. Dr. M. Hasan, M.Si., dan Prof. Dr. Abdul Gani, M.Si.
Kemasan makanan berbahan plastik menimbulkan masalah lingkungan karena sulit terurai secara alami. Sebagai alternatif yang lebih ramah lingkungan, bionanokomposit film dapat digunakan untuk mengurangi dampak ekologis sekaligus memperpanjang masa simpan makanan. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan N-doped carbon quantum dots (NCQD) terhadap karakterisktik bionanaokomposit film. Penelitian ini menggunakan metode kuantitatif dan dianalisis secara statistik. Film dibuat menggunakan metode solvent casting, dengan pati aren, kitosan, dan ekstrak bunga telang sebagai matriks utama, serta NCQD sebagai bahan tambahan dengan variasi konsentrasi (0, 1, 3, dan 5 mg). Karakterisasi dilakukan melalui analisis termal, mekanik, morfologi permukaan, struktur kristalin, penghalang terhadap uap air, aktivitas antioksidan, dan struktur kimia film. Hasil analisis struktur kristal menunjukkan peningkatan struktur kristalin seiring dengan bertambahnya NCQD. Hasil analisis FTIR mengidentifikasi pola puncak serapan pada O-H stretching (3419 cm-1), C-H stretching (2933 cm-1), N-H bending (1628 cm-1), C-N stretching (1416 cm-1), dan C-O-C stretching (1025 cm-1). Analisis permeabilitas uap air menurun seiring dengan penambahan NCQD, film CH/SPS/NCQD-0 memiliki nilai WVP tertinggi, sedangkan CH/SPS/NCQD-III memiliki nilai WVP terendah. Hasil analisis aktivitas antioksidan menunjukkan penmbahan NCQD dalam matriks film meningkatkan sifat antioksidan. Analisis SEM menunjukkan struktur permukaan film yang semakin halus seiring penambahan NCQD. Analisis sifat mekanik menunjukkan film telah memenuhi standar Japanese Industrial Standards (JIS) dengan hasil kuat tarik 45,62 – 65,37 Mpa dan nilai elongasi 45-107%% belum memenuhi standar JIS minimal 50%. Analisis sifat termal menunjukkan peningkatan stabilitas termal seiring dengan bertambahnya NCQD. Secara keseluruhan, bionanokomposit film berbasis pati aren, kitosan, ekstrak bunga telang, dan NCQD berhasil dibuat dengan karakteristik fisikokimia yang baik, serta berpotensi sebagai alternatif kemasan cerdas yang ramah lingkungan.
Kata kunci: N-doped carbon quantum dots, bionanokomposit film, pati aren, kitosan, ekstrak bunga telang, gliserol.

Dian Nur Fathinah. (2025). Effect of Addition of N-Doped Carbon Quantum Dots on the Characteristics of Thermo-Mechanical Properties of Bionanocomposite Films of Palm Starch, Chitosan, and Butterfly Pea Flower Extract. [Skripsi. Universitas Syiah Kuala]. Under direction of Prof. Dr. M. Hasan, M.Si., and Prof. Dr. Abdul Gani, M.Si. Plastic food packaging causes environmental problems because it is difficult to decompose naturally. As a more environmentally friendly alternative, bionanocomposite films can be used to reduce ecological impacts while extending the shelf life of food. This study aims to analyze the effect of the addition of N-doped carbon quantum dots (NCQD) on the characteristics of bionanocomposite films. This study uses a quantitative method and is analyzed statistically. The film was made using the solvent casting method, with palm starch, chitosan, and butterfly pea flower extract as the main matrix, and NCQD as additional materials with varying concentrations (0, 1, 3, and 5 mg). Characterization was carried out through thermal, mechanical, surface morphology, crystalline structure, barrier to water vapor, antioxidant activity, and chemical structure of the film. The results of the crystal structure analysis showed an increase in the crystalline structure along with the increase in NCQD. The results of FTIR analysis identified the absorption peak pattern in O-H stretching (3419 cm-1), C-H stretching (2933 cm-1), N-H bending (1628 cm-1), C-N stretching (1416 cm-1), and C-O-C stretching (1025 cm-1). The water vapor permeability analysis decreased with the addition of NCQD, the CH/SPS/NCQD-0 film had the highest WVP value, while CH/SPS/NCQD-III had the lowest WVP value. The results of the antioxidant activity analysis showed that the addition of NCQD in the film matrix increased the antioxidant properties. SEM analysis showed that the surface structure of the film became smoother with the addition of NCQD. Analysis of mechanical properties showed that the film had met the Japanese Industrial Standards (JIS) standard with a tensile strength of 45,62-65,37 Mpa and an elongation value of 45-107%% did not meet the JIS standard of at least 50%. Thermal property analysis showed an increase in thermal stability with the addition of NCQD. Overall, the bionanocomposite film based on palm starch, chitosan, butterfly pea flower extract, and NCQD was successfully prepared with good physicochemical characteristics, and has the potential as an alternative to environmentally friendly smart packaging. Keywords: N-doped carbon quantum dots, bionanocomposite films, palm starch, chitosan, butterfly pea flower extract, glycerol.