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All Journal IPTEK The Journal for Technology and Science Agrointek E-Dimas: Jurnal Pengabdian kepada Masyarakat Chimica et Natura Acta JMM (Jurnal Masyarakat Mandiri) Jurnal Teknologi Journal of Sustainable Engineering: Proceedings Series Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Azafilmi Hakiim
Universitas Singaperbangsa Karawang
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Effect of Ultrasonic Processing on Mechanical and Surface Properties of Chitosan-Alginate-Starch Edible Films Desi Rahmawati; Azafilmi Hakiim; Indah Cintami; Alehandro Sitinjak
Rekayasa Vol. 23 No. 2 (2025)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v23i2.49226

Abstract

Marine plastic waste has driven the development of biodegradable packaging alternatives such as edible films. However, their mechanical strength and structural homogeneity remain challenging. This study investigates the effect of ultrasonic processing on the mechanical and surface properties of edible films based on chitosan–alginate–starch blends. Edible films were prepared with various polysaccharide combinations and subjected to ultrasonic treatment during processing. The sample was treated with ultrasonic waves at a frequency of 37 kHz and a temperature of 30 °C for 3 minutes. The results show that ultrasonic treatment improved surface homogeneity, as indicated by smoother structures and reduced bubble formation compared to non-ultrasonic films. In terms of mechanical properties, ultrasonic treatment exhibited varying effects on tensile strength but consistently increased elongation at break, indicating enhanced flexibility. The highest tensile strength was observed in chitosan-based films (45.479 MPa), while the highest elongation (41%) was achieved in chitosan–alginate films under ultrasonic treatment. The ternary blend (chitosan–alginate–starch) demonstrated balanced mechanical properties in both ultrasonic and non-ultrasonic conditions. Chemical analysis using FTIR spectroscopy showed that ultrasonic treatment affected intermolecular interactions within the film matrix, as indicated by shifts and changes in the intensity of absorption bands in several functional groups. These findings suggest that ultrasonic processing plays a crucial role in improving film structure and flexibility, while the polysaccharide composition governs the balance between strength and elasticity.
Co-Authors Adetiya Irawan Alehandro Sitinjak Cintiya Septa Hasannah Desi Rahmawati Dessy Agustina Sari Didik Supriyadi, Didik Endah Purwanti H Hadiyanto Indah Cintami Iyan Iyan Kamilah Pathun Ni'mah M. Djaeni Muhamad Djaeni Muhammad Fahmi Hakim Nurul Asiah Rahmat Hidayat Reza Setiawan Sarah Dampang Sukanta Sukanta Sukanta Vita Efelina Wagiono Wagiono