Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, PR China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China.
Bioresour Technol. 2022 Mar;348:126793. doi: 10.1016/j.biortech.2022.126793. Epub 2022 Feb 1.
Hemicelluloses were effectively separated using p-toluenesulfonic acid (p-TsOH) treatment at high temperature. High temperature and pressure promoted hydrolysis of hemicellulose, which limited its value upon recovery. In this study, bagasse hemicellulose was separated and extracted by p-TsOH treatment at atmospheric pressure. The effects of temperature, p-TsOH concentration, and time on hemicellulose separation and extraction were investigated. The optimal conditions were 80 °C, 3.0% p-TsOH, and 120 min. The separation and extraction yield of hemicellulose was 73.23% and 36.02%, respectively. Extraction hemicellulose with 95.60% purity was obtained. In addition, the dissolution mechanism of hemicellulose was analyzed. Degradation of β-glycosidic bonds was inhibited. Benzyl ether bond between carbohydrates and lignin was selectively cleaved. The skeleton structure of xylan in hemicellulose was protected while the functional groups of branch chain were severely damaged. It provides a valuable theoretical basis for the efficient separation and extraction of hemicellulose.
使用对甲苯磺酸（p-TsOH）在高温下可以有效地分离半纤维素。高温和高压促进了半纤维素的水解，这限制了其回收价值。在这项研究中，通过在常压下用 p-TsOH 处理来分离和提取蔗渣半纤维素。考察了温度、p-TsOH 浓度和时间对半纤维素分离和提取的影响。最佳条件为 80°C、3.0% p-TsOH 和 120min。半纤维素的分离和提取收率分别为 73.23%和 36.02%。得到纯度为 95.60%的提取半纤维素。此外，还分析了半纤维素的溶解机制。抑制了β-糖苷键的降解。碳水化合物与木质素之间的苯甲醚键被选择性地切断。半纤维素中木聚糖的骨架结构得到了保护，而支链的官能团则受到了严重的破坏。这为高效分离和提取半纤维素提供了有价值的理论依据。
