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Synthesis and characterization of cellulose from locally available rice straw

机译：局部可用稻草纤维素的合成与表征

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摘要

Rice is the main agricultural food in Sri Lanka today. Paddy crops are cultivated as a wetland crop in all the districts. Rice straw is a waste product of the rice harvest that is generated in equal or greater quantities than the rice itself. Despite these larger quantities, rice straw is frequently burned in open air by farmers which makes it a significant source of pollution. In the search for possible uses of rice straw, it was found that rice straw contains considerable amount of cellulose which pave the way for the production of cellulose. This study mainly focuses on the synthesis and characterization of cellulose from rice straws of most frequently used traditional (Suwandel, Raththal) and technically modified (BG300, BG352) rice varieties in Sri Lanka. Up to date, pure cellulose has been separately isolated from rice straws of above mentioned four rice varieties after following a three-step de-waxing, delignification and hemicellulose (and silica) removal process. The formation of pure cellulose and complete removal of non-cellulosic materials from rice straw was confirmed by FTIR spectroscopy after each chemical purification step. Highest cellulose yield was observed from rice straws of Suwandel variety (35.2%). Other rice varieties showed cellulose yield BG352 (29.3%), BG300 (27.9%) and Raththal (25.1%).
机译：赖斯是在斯里兰卡今天主要的农业食品。水稻作物栽培在所有地区湿地作物。稻草是在相等或更大数量比大米本身产生的水稻收割的废品。尽管有这些数量较多，稻草经常被农民焚烧露天这使得它污染的显著来源。在寻找稻草的可能的用途，发现稻草包含铺平了生产纤维素的方式大量的纤维素。这项研究主要集中在纤维素的合成与表征从稻草中最常用的传统（Suwandel，Raththal）和技术改进（BG300，BG352）水稻品种在斯里兰卡。到目前为止，纯纤维素已被分开的上述4个水稻品种稻草以下三个步骤的脱蜡，脱木素和半纤维素（和二氧化硅）去除处理后分离。纯纤维素和完全除去从稻草非纤维素材料的形成通过FTIR光谱的每种化学物质的纯化步骤后确认。从Suwandel品种（35.2 ％）稻草观察最高纤维素的产率。其他水稻品种表现出纤维素产量BG352（29.3 ％），BG300（27.9 ％）和Raththal（25.1 ％）。

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