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All Journal Al-Kimia Jurnal Teknik Terapan (J-TETA)
Rohmaful Aeni, Alfieta
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Characterization of Biodegradable Avocado Seed Starch Films Reinforced with Chitosan and Plasticized with Glycerol Hartanti, Adelia; Nur Wahyudi, Mohamad; Fahmi Hakim, Muhammad; Rohmaful Aeni, Alfieta; Agustina Sari, Dessy
Al-Kimia Vol 13 No 1 (2025): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

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Researchers have developed biodegradable bioplastics from renewably sourced natural materials in response to the environmental consequences of synthetic plastics. This study looks at how different amounts of glycerol and chitosan affect the properties of bioplastics made from avocado seed starch. This study evaluated the mechanical, hydrophilic, and degradation properties in terms of tensile strength, elongation at break, thickness, water absorption, and structural stability over time. The results showed that an increase in glycerol content improved flexibility and elongation but impaired tensile strength and water resistance. On the other hand, the increase of chitosan concentration contributes to a significant enhancement of tensile strength, water resistance, and stability. The mixture A3 (1 ml glycerol, 4.5 g chitosan) was thought to have good mechanical stiffness (16.560 ± 3.661 MPa) and water resistance. On the other hand, B1 (2 ml and 2.5 g) had better elasticity (elongation: 32.299 ± 8.910%). Upon performing degradation analysis, B-series samples exhibited a high hydrophilicity, which caused faster breakdown as opposed to A-series samples. Avocado seed starch plasticized by a combination of chitosan and glycerol shows promise as an environmentally friendly plastic, and this study shows a way toward fine-tuning both mechanical and hydrophilic properties to produce biodegradable bioplastics
Pengaruh Variasi Waktu Transesterifikasi dan Konsentrasi Katalis terhadap Karakteristik Sifat Fisik Biodiesel Berbahan Minyak Jelantah Rosidah, Cicih; Nurul Fadhillah, Ghina; Rohmaful Aeni, Alfieta; Yuliasari, Fitri; Pangni Fahriani, Vera
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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As a promising alternative fuel, biodiesel is expected  to grow in the future, aligning As part of global initiatives to lessen dependence on fossil fuels. This study focuses on using used cooking oil from frying chicken As a feedstock for biodiesel production through transesterification. The aim is to explore the effects of varying transesterification times and catalyst concentrations on the physical properties of the biodiesel produced, including density, viscosity, and yield. The method involves testing at different time intervals of 30, 40, and 50 minutes, with catalyst concentrations of 1%, 1.5%, and 2% to determine optimal conditions. Additionally, Fourier Transform Infrared (FTIR) tests were conducted to identify functional groups in the compounds.Results indicate that the highest biodiesel yield was achieved after 30 minutes of transesterification with a 1% catalyst concentration. The best viscosity was noted at 40 minutes with a 2% catalyst, while the optimal density was recorded at 30 minutes with a 2% catalyst.
Co-Authors Dessy Agustina Sari Fahmi Hakim, Muhammad Hartanti, Adelia Nur Wahyudi, Mohamad Nurul Fadhillah, Ghina Pangni Fahriani, Vera Rosidah, Cicih YULIASARI, FITRI