Abstract
Hemicellulose is one of the most common polysaccharides found in nature. Its use as a green and sustainable raw material for industries is desirable. In this work, an alkaline-alcoholic method was used to extract hemicelluloses from sugarcane bagasse. After extraction, films with 2%, 3% and 4% (w/v) hemicellulose were produced. The films’ morphology, thickness, water solubility, tensile properties and thermal stability were evaluated. The Fourier Transform Infrared Spectroscopy (FTIR) results reveal that the method used removes the hemicellulose from bagasse with a low concentration of lignin. The films presented a compact and dense structure with uniformity in thickness associated with higher solubility in water. The increase in hemicellulose content increased tensile strength, but reduced the tensile strain of the films. Thermogravimetric analysis indicated that the increase in hemicellulose content reduced the films’ thermal stability. Thus, these films may act as useful, biodegradable and environmentally friendly materials for engineering applications.
Highlights
Consumer demand for healthier, safer and natural products has increased [1,2,3].in recent years, there has been growing interest in the development of materials from natural polymers, those obtained from renewable resources [4,5]
The main objective of this work was to develop and characterize the properties of hemicellulose films produced from sugarcane bagasse using an alkali-alcoholic extraction
The solution was centrifuged at 4000 rpm for 15 min and 3 volumes of ethanol were added to the still solubilized hemicelluloses
Summary
Consumer demand for healthier, safer and natural products has increased [1,2,3]. In recent years, there has been growing interest in the development of materials from natural polymers, those obtained from renewable resources [4,5]. Sugar mills generate approximately 270 kg of bagasse (50% moisture) per metric ton of sugarcane [7]. Half of this waste is used to generate the energy required for the production of sugar and in fuel ethanol plants [7,8].
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