The current hemicelluloses extraction methods have problems such as low extraction ratio and quality. In the previous study, a new pH pre-corrected hydrothermal pretreatment has been proved effective in improving enzymatic hydrolysis of cellulose while retaining higher hemicelluloses without degradation. In this investigation, the synergistic effect of alkali loading and hydrothermal pretreatment severity on hemicelluloses preservation was studied. After pretreatment, the hemicelluloses were extracted with alkali. The results show that hemicelluloses extracted with 10% (w/v) NaOH after pH pre-corrected hydrothermal pretreatment at the severity of 2.0 contained no cellulose. At this condition, the ratios of hemicelluloses dissolution and recovery were the highest. The extracted hemicelluloses had the lowest color value, branch degree, and polydispersity.

当前的半纤维素提取方法存在诸如提取率低和质量低的问题。在先前的研究中，新的pH值预先校正的水热预处理已被证明可有效改善纤维素的酶促水解，同时保留较高的半纤维素而不降解。在这项研究中，研究了碱负荷和水热预处理强度对半纤维素保存的协同作用。预处理后，用碱提取半纤维素。结果表明，在pH值经过2.0的严重程度预先校正的水热预处理后，用10％（w / v）NaOH提取的半纤维素不包含纤维素。在此条件下，半纤维素的溶解和回收率最高。提取的半纤维素的色值，分支度最低，