Eli Rohaeti, Amalia Sultan Nanda Annisa, Isti Yunita, Suwardi
This objectives of the research were to determine the formation of silver nanoparticles, the effect of adding glycerol and chitosan on biodegradability of bacterial cellulose from sweet potato waste water deposited by silver nanoparticles, the effect of biodegradation time to biodegradatibility of bacterial cellulose deposited silver nanoparticles. The research was started by making nata of liquid waste of sweet potatoes which is fermented by Acetobacter xylinum during 7 days. Bacterial cellulose-chitosan and bacterial cellulose-glycerol-chitosan were prepared before the drying process by immersed in chitosan solution. Preparation of silver nanoparticles was carried out by chemical reduction method from solution of AgNO3 with trisodium citrate and gelatin and than was characterized by using a UV-Vis spectrophotometer. Biodegradability of bacterial cellulose and its composite was studied by mass loss and rate of mass loss. The cellulose was characterized by FTIR-ATR to determine the functional groups and XRD to determine crystallinity. The results showed that the silver nanoparticles have been successfully synthesized indicated by absorption at 418.80?nm, the addition of glycerol and chitosan decreased biodegradability of bacterial cellulose, the biodegradation time caused increasing mass loss and decreasing the rate of mass loss, and the highest nanosilver doped bacterial cellulose had -OH and C-O functional group and than the higher crystallinity than before biodegradation. © 2023 Author(s).
Department of Chemistry Education, Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta, 55281, Indonesia; Department of Food Science and Technology, Faculty of Agricultural Technology, Universitas Gajah Mada Indonesia, Indonesia
