Heru Suryanto, Muhamad Muhajir, Neena Zakia, Uun Yanuhar, Aminnudin Aminnudin, Yanuar Rohmat Aji Pradana
Properties of Bacterial Cellulose was depended on the fermentation conditions to produce BC as well as the processing steps for modifying the Bacterial Cellulose microstructure. This study reports on the comparison effect of drying method on Bacterial Cellulose films structure produced from Pineapple Peel Extract. The drying method was done in the oven and freeze-drying. Pellicle as results of fermentation by bacteria was dried in the oven. High-pressure homogenization was applied before the freeze-drying method. BC film structure was observed using scanning electron microscopy and evaluated using X-ray diffraction. The results show that the peak of diffractogram shows crystalline peaks in a relatively similar position, which are at about 14° and 22°. High-pressure homogenizer process before freeze-drying results the structure with higher crystalline compare than oven drying. The index of crystalline and degree of crystalline of BC film in the freeze-drying method were higher than those in the oven with a value of 83% and 86% compared than 81% and 84%, respectively. Drying methods to pellicle in the oven and freeze-drying results in the degree of crystalline of 79% and 71%, respectively. The morphology of the freeze-drying methods contains a more porous structure. © 2020 Trans Tech Publications Ltd, Switzerland.
Mechanical Engineering Department, Engineering Faculty, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, East Java, Indonesia; Centre of Advanced Materials for Renewable Energy, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65140, East Java, Indonesia; Universitas Negeri Malang, Engineering Faculty, Jl. Semarang 5, Malang, 65145, East Java, Indonesia; Chemical Department, Mathematics and Natural Sciences Faculty, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, East Java, Indonesia; Fisheries and Marine Sciences Faculty, Brawijaya University, Jl. Veteran, Malang, 65145, East Java, Indonesia
