Selective radical depolymerization of cellulose to glucose induced by high frequency ultrasound

Haouache, Somia; Karam, Ayman; Chave, Tony; Clarhaut, Jonathan; Amaniampong, Prince Nana; García-Fernández, José Manuel; Vigier, Karine De Oliveira; Capron, Isabelle; Jérôme, François

doi:10.1039/d0sc00020e

Cited by 20 publications

(16 citation statements)

References 75 publications

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“…Breakage of the β-glycosidic bonds needs to happen during the formation of kinks, i.e., deformations of the fibril in the length direction, , and breakage of cellulose fibrils into smaller fibrils (see the length distribution in Figure d), facilitated by hydroxyl radicals that form at the hot spot of an imploding cavity. , The increase in the group (2) ratio is most prominent for early cavitation, i.e., until 15 min, and flattens out thereafter. Zhou et al reported a reduction in the number of kinks, and the ceasing of the fibril shortening with the sonication time.…”

Section: Fibrillation Results and Discussionmentioning

confidence: 99%

Cavitation Fibrillation of Cellulose Fiber

et al. 2022

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Cellulose fibrils are the structural backbone of plants and, if carefully liberated from biomass, a promising building block for a bio-based society. The mechanism of the mechanical release—fibrillation—is not yet understood, which hinders efficient production with the required reliable quality. One promising process for fine fibrillation and total fibrillation of cellulose is cavitation. In this study, we investigate the cavitation treatment of dissolving, enzymatically pretreated, and derivatized (TEMPO oxidized and carboxymethylated) cellulose fiber pulp by hydrodynamic and acoustic (i.e., sonication) cavitation. The derivatized fibers exhibited significant damage from the cavitation treatment, and sonication efficiently fibrillated the fibers into nanocellulose with an elementary fibril thickness. The breakage of cellulose fibers and fibrils depends on the number of cavitation treatment events. In assessing the damage to the fiber, we presume that microstreaming in the vicinity of imploding cavities breaks the fiber into fibrils, most likely by bending. A simple model showed the correlation between the fibrillation of the carboxymethylated cellulose (CMCe) fibers, the sonication power and time, and the relative size of the active zone below the sonication horn.

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Section: Fibrillation Results and Discussionmentioning

confidence: 99%

Cavitation Fibrillation of Cellulose Fiber

et al. 2022

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“…Most degradation processes are on the base of hydrolysis, reduction or oxidation reactions, and ultrasound irradiation is effective for the degradation of a variety of organics including refractory biomacromolecules and problematic pollutants. Jerome et al carried out the selective depolymerization of cellulose to glucose in water by using ultrasound irradiation at a high frequency of 525 kHz, [118] which was depend upon the concept that H· radicals rather than ·OH radicals formed by cavitation bubbles would be more likely to induce the cleavage of glycosidic bonds ( Fig. 7 ).…”

Section: Degradationmentioning

confidence: 99%

Sonochemical fabrication of inorganic nanoparticles for applications in catalysis

Zhuang

Dong

et al. 2021

Ultrasonics Sonochemistry

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“…By subjecting the cellulose to ultrasonication, further, the weak β-D-(1!4) glycosidic bonds of cellulose are broken. [26,27] Thus, cellulose nanoparticles were formed in the microemulsion system [28] under sonication.…”

Section: Cellulose Nanoparticles Preparationmentioning

confidence: 99%

Preparation of Spherical Cellulose Nanoparticles from Recycled Waste Cotton for Anticancer Drug Delivery

Gülsu

YÜKSEKTEPE

2021

ChemistrySelect

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Using natural waste resources as a starting material for the preparation of cellulose nanoparticles is a field of interest for novel pharmaceutical applications. This study aims to introduce cellulose nanoparticles for Doxorubicin (DOX) delivery to tumor cells. Cellulose nanocrystals were first produced from waste cotton by hydrochloric acid (1 M) hydrolysis, and then spherical cellulose nanoparticles were prepared by microemulsion method. The prepared particles were spherical with 300 nm in size, and the zeta potential was À 12.5 mV. The drug entrapment efficiency was ∼ 99 % (w/w). DOX loaded particles exhibited a biphasic release pattern at pH 7.4 phosphate buffer without initial burst effect. Release experiments demonstrated that DOX release was up to 34 days (97 %). In vitro cytotoxicity assay on human A549 (human lung adenocarcinoma) cell line was performed by MTT assay. The results show that prepared particles are effective on cancer cells. It is important in terms of economic and environmental problems that the material prepared for use in cancer drug release presented here is obtained from the waste cotton.

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Selective radical depolymerization of cellulose to glucose induced by high frequency ultrasound

Abstract: Ultrasonic irradiation of cellulose at a high frequency induces its selective depolymerization to glucose at room temperature and atmospheric pressure within only a few minutes.

Cited by 20 publications

References 75 publications

Cavitation Fibrillation of Cellulose Fiber

Cavitation Fibrillation of Cellulose Fiber

Sonochemical fabrication of inorganic nanoparticles for applications in catalysis

Preparation of Spherical Cellulose Nanoparticles from Recycled Waste Cotton for Anticancer Drug Delivery

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