Isolation of microcellulose from peanut shell (Arachis hypogaea) and its potential application
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Abstract
Abstract. Trisnawati EW, Pramono E, Suryanti V. 2023. Isolation of microcellulose from peanut shell (Arachis hypogaea L.) and its potential application. Pros Sem Nas Masy Biodiv Indon 9: 137-142. Peanut seeds are widely used in the food industry as an ingredient for making peanut butter, while peanut shells have the potential to become waste that has no economic value. Peanut skin has a high enough cellulose content, so this study isolated microcellulose from peanut shells. Microcellulose isolation was conducted using the alkalization method with NaOH and bleaching with NaOCl. Peanut shell microcellulose was confirmed using SEM (Scanning Electron Microscope), FT-IR (Fourier Transform-Infra Red), TGA (Thermogravimetric Analysis), and DSC (Differential Scanning Calorimetry). SEM analysis showed the morphology of microcellulose fibers with a flat shape, close together, rough surface, and measures 7.77 µm. FT-IR analysis showed the successful isolation of microcellulose with the absence of hemicellulose and lignin peaks. TGA and DSC analysis showed three stages of degradation with a microcellulose degradation temperature at 195°C and a melting point at 120°C. These results indicate that microcellulose was successfully isolated from peanut shells and has the potential as a starting material for membrane fillers, membrane matrices, composites, adsorbents, hydrogels, and films for food packaging.