Abstract

The interest in the application of deep eutectic solvents (DES) as a green solvent has increased rapidly. The application of DES in agro-industrial okara treatment can be developed into industrialization. In order to simplify the degreasing, deproteinization and cellulose extraction steps in the process of pretreating okara cellulose, a new approach to cellulose extraction from okara via one-pot DES treatment is established. Three different complexing agents, choline salts in oxalic acid, in glycerol and in urea are studied in this work. The structure and properties of cellulose nanofibers (CNFs) prepared by high pressure homogenization following pretreatment of okara with anionic systhesized DES are investigated. The effects of different systems on the degree of microfibrillation of okara are analyzed using techniques such as SEM, FTIR, TD and DTG. The results indicate that by pretreating okara with choline chloride–oxalic acid type solvent, CNFs with average diameter of 27 nm are obtained using high pressure homogenization.

中文翻译：

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用深共熔溶剂通过高压均质法从豆渣中制备纤维素纳米原纤维

摘要

将深共晶溶剂（DES）用作绿色溶剂的兴趣迅速增加。DES在农业工业豆渣处理中的应用可以发展为工业化。为了简化豆渣纤维素预处理过程中的脱脂，脱蛋白和纤维素提取步骤，建立了一种通过单锅DES处理从豆渣中提取纤维素的新方法。这项工作研究了三种不同的络合剂，草酸，甘油和尿素中的胆碱盐。研究了用阴离子合成的DES对豆渣进行预处理后，通过高压均质法制备的纤维素纳米纤维（CNFs）的结构和性能。使用扫描电镜，傅立叶变换红外光谱（FTIR），红外光谱（FTIR）等技术分析了不同系统对豆渣微纤化程度的影响。TD和DTG。结果表明，通过用氯化胆碱-草酸类溶剂预处理豆渣，可以使用高压均质技术获得平均直径为27 nm的CNF。