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Su Q, He D, Luo J, Zhou X, Wu S, Zhao L, Shen F, Hu J, Tian D. A cascaded process to upgrade bleached bamboo pulp into dissolving pulp and arabinoxylan. Carbohydr Polym 2024; 345:122584. [PMID: 39227112 DOI: 10.1016/j.carbpol.2024.122584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 07/24/2024] [Accepted: 08/05/2024] [Indexed: 09/05/2024]
Abstract
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 (α-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.
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Affiliation(s)
- Qiongyao Su
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Daizunyan He
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Jianping Luo
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Xiaowen Zhou
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Shiyu Wu
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Li Zhao
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Fei Shen
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Jinguang Hu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
| | - Dong Tian
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
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