A cascaded process to upgrade bleached bamboo pulp into dissolving pulp and arabinoxylan

被引:3
作者
Su, Qiongyao [1 ]
He, Daizunyan [1 ]
Luo, Jianping [1 ]
Zhou, Xiaowen [1 ]
Wu, Shiyu [1 ]
Zhao, Li [1 ]
Shen, Fei [1 ]
Hu, Jinguang [2 ]
Tian, Dong [1 ]
机构
[1] Sichuan Agr Univ, Coll Environm Sci, Chengdu 611130, Sichuan, Peoples R China
[2] Univ Calgary, Dept Chem & Petr Engn, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada
关键词
Alkaline DES; Mechanical refining; Dissolving pulp; Arabinoxylan; DEEP EUTECTIC SOLVENT; REACTIVITY; CELLULOSE; NANOFIBRILLATION; PRETREATMENT; LIGNIN; PAPER;
D O I
10.1016/j.carbpol.2024.122584
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The dissolving pulp preparation from bleached kraft pulp while realizing the high-value application of hemicellulose fraction is of great significance for improving the overall economics of the process. This work proposed a two-step cascaded process of deep eutectic solvent (DES) pretreatment combined with mechanical refining for the co-production of dissolving pulp and arabinoxylan (AX) from bleached bamboo pulp. Results showed that using alkaline DES composed of quaternary ammonium hydroxide and urea prepared high-quality dissolving pulp (alpha-cellulose content of 97.7%) while selectively extracting high-quality AX. The mechanical refining rapidly opened up the cellulose structure to increase its Fock reactivity to over 70.0 %. When 100 g bleached bamboo pulp was subjected to this technology route, the high yields of dissolving pulp (63.8 g) and AX (13.0 g) were respectively obtained. It was proposed that the tailored DES with different alkalinity could specifically produce dissolving pulp or AX which were more favorable for downstream application through distinct action pathways. The swelling effects of DES on the cellulose surface facilitated the subsequent mechanical fibrillation, allowing a synergistic enhancement of the reactivity. Thus, the integrated process provided a sustainable alternative for dissolving pulp upgrading while adding attractiveness by co-producing AX product stream.
引用
收藏
页数:12
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