Green, efficient extraction of bamboo hemicellulose using freeze-thaw assisted alkali treatment
Green, efficient extraction of bamboo hemicellulose using freeze-thaw assisted alkali treatment
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DOI：
10.1016/j.biortech.2021.125107
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发表时间：
2021-04-17
影响因子：
11.4
通讯作者：
Yao, Shuangquan
中科院分区：
文献类型：
--
作者：
Li, Jing;Liu, Zhaomeng;Yao, Shuangquan
木质纤维素生物质高值化利用的前提是半纤维素的有效分离。本文研究了冻融辅助碱处理（FAT）提取竹子半纤维素的工艺。研究了碱浓度、碱处理时间、冷冻温度和冻融时间对主要成分的影响。将竹子在-30 ℃下冷冻12 h，在室温下解冻，然后在75 ℃下用7.0%碱处理90 min。半纤维素的提取率高达64.71%。采用常规AT的半纤维素样品纯度从82.63%下降到78.56%。进一步降低碱浓度，可得到与常规碱处理相同得率的半纤维素。半纤维素样品的纯度从82.63%提高到89.45%。它具有更高的纯度、更高的分子量和更低的多分散性。提出了一种新型、绿色、高效的碱法提取半纤维素的方法。
The premise of high value utilization of lignocellulosic biomass is effective separation of hemicellulose. In this paper, the extraction of bamboo hemicellulose using freeze-thaw assisted alkali treatment (FAT) was studied. The effect of alkali concentration, alkali treatment time, freezing temperature, and freeze-thaw time on the main components was studied. Bamboo was frozen at -30 degrees C for 12 h, thawed at room temperature, and then treated at 75 degrees C for 90 min with 7.0% alkali. The extraction rate of hemicellulose was as high as 64.71%. The purity of hemicellulose samples using conventional AT decreased from 82.63% to 78.56%. Hemicellulose with the same yield as that of conventional alkali treatment was obtained by further reducing the alkali concentration. The purity of hemicellulose samples increased from 82.63% to 89.45%. It had a higher purity, higher molecular weight, and lower polydispersity. A new, green and efficient alkaline extraction method for hemicellulose was developed.