Nanocellulose separation from barley straw via ultrasound-assisted choline chloride – Formic acid deep eutectic solvent pretreatment and high-intensity ultrasonication

IF 8.7 1区化学 Q1 ACOUSTICS Ultrasonics Sonochemistry Pub Date : 2024-08-30 DOI:10.1016/j.ultsonch.2024.107048

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Abstract

The present study aims at investigating the application of ultrasound assisted choline chloride (ChCl) – formic acid (FA) deep eutectic solvent (DES) pretreatment of Barley straw. In addition, the efficiency of a wet grinding followed by high intensity ultrasound (HIUS) treatment for production of cellulose nanofibers (CNF) has been evaluated. The DES (using ChCl: FA at 1:9 M ratio) treatment at 45 kHz ultrasound frequency and 3 h of treatment duration resulted in 84.68 ± 1.02 % and 82.96 ± 0.79 % of lignin and hemicellulose solubilisation, respectively. The purification of DES treated solid residue resulted in cellulose with more than 90 % purity. Further, 10 min of wet grinding followed by 40 min of HIUS treatment resulted in more than 80 % nano-fibrillation efficiency. The produced CNF had diameters less than 100 nm in number size distribution and type I cellulose structure. This study confirmed that the developed process offers a sustainable method for producing nanocellulose from agricultural waste.

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通过超声辅助氯化胆碱-甲酸深共晶溶剂预处理和高强度超声从大麦秸秆中分离出纳米纤维素。

本研究旨在探讨超声波辅助氯化胆碱（ChCl）-甲酸（FA）深共晶溶剂（DES）预处理大麦秸秆的应用。此外，还评估了湿法研磨后高强度超声（HIUS）处理生产纤维素纳米纤维（CNF）的效率。在 45 kHz 超声波频率和 3 小时处理持续时间下进行 DES（使用氯化 ChCl：FA，1:9 M 的比例）处理，木质素和半纤维素的溶解度分别为 84.68 ± 1.02 % 和 82.96 ± 0.79 %。经 DES 处理后的固体残留物可提纯出纯度超过 90% 的纤维素。此外，10 分钟的湿研磨和 40 分钟的 HIUS 处理可使纳米纤维化效率超过 80%。生产出的 CNF 直径小于 100 nm，具有 I 型纤维素结构。这项研究证实，所开发的工艺为利用农业废弃物生产纳米纤维素提供了一种可持续的方法。

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来源期刊

Ultrasonics Sonochemistry 化学-化学综合

CiteScore

15.80

自引率

11.90%

发文量

361

审稿时长

59 days

期刊介绍： Ultrasonics Sonochemistry stands as a premier international journal dedicated to the publication of high-quality research articles primarily focusing on chemical reactions and reactors induced by ultrasonic waves, known as sonochemistry. Beyond chemical reactions, the journal also welcomes contributions related to cavitation-induced events and processing, including sonoluminescence, and the transformation of materials on chemical, physical, and biological levels. Since its inception in 1994, Ultrasonics Sonochemistry has consistently maintained a top ranking in the "Acoustics" category, reflecting its esteemed reputation in the field. The journal publishes exceptional papers covering various areas of ultrasonics and sonochemistry. Its contributions are highly regarded by both academia and industry stakeholders, demonstrating its relevance and impact in advancing research and innovation.