Highly efficient preparation of cellulose nanocrystals by mechano-enzymatic hydrolysis: a mechanism study

Zhang, Qihong; Chen, Ying; Su, Weike

doi:10.1039/d2cy01904c

Cited by 3 publications

(1 citation statement)

References 38 publications

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“…However, its nonselective nature often leads to the random depolymerization of lignin, and the difficulty of finding a suitable enzyme activator further limits its efficiency. To overcome these limitations, researchers have proposed combining mechanochemistry to enhance the enzymatic efficiency and make the reaction conditions milder and safer. − Besides, it is crucial to study the kinetics of enzymatic hydrolysis during mechanical ball milling to gain a deeper understanding of the reaction process . Building upon the concept of the mechanochemical enzymatic hydrolysis of lignin, our goal is to develop an improved mechanochemical enzymatic degradation method.…”

Section: Introductionmentioning

confidence: 99%

Novel Mechanoenzymatic Strategy for Lignin Depolymerization

Xu,

Zhou,

et al. 2023

Ind. Eng. Chem. Res.

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Section: Introductionmentioning

confidence: 99%

Novel Mechanoenzymatic Strategy for Lignin Depolymerization

Xu,

Zhou,

et al. 2023

Ind. Eng. Chem. Res.

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Enhancing Enzymatic Hydrolysis of Rice Straw by Acid-Assisted Mechanocatalytic Depolymerization Pretreatment

Yu,

Cheng

et al. 2024

Agronomy

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The inherent complexity of cellulose, hemicellulose, and lignin contributes to the recalcitrance of lignocellulosic biomass, resulting in a low conversion efficiency and high cost of bioethanol conversion. Pretreatment methods that disrupt the plant cell structure of lignocellulose, such as straw, can significantly enhance the conversion efficiency. In this study, we utilized an acid-assisted mechanocatalytic depolymerization technique to pretreat rice straw, and the results demonstrated a significant disruption of the cellulose structure of the straw. Compared to the untreated straw, the particle size of pretreated straw reduced from 279 μm to 11.8 μm, the crystallinity of cellulose decreased from 43.05% to 22.71%, the specific surface area increased by 177%, and the surface oxygen-to-carbon ratio (O/C) ratio was enhanced by 75%. The changes in microstructure enabled the pretreated straw to achieve a total sugar yield of over 95% within 12 h of enzymatic hydrolysis, significantly superior to the 36.24% yield from untreated straw, the 45.20% yield from acid impregnated straw, and the 73.25% yield from ball milled straw. Consequently, acid-assisted mechanocatalytic depolymerization emerges as a highly effective pretreatment strategy to enhance both the enzymatic hydrolysis and the overall conversion efficiency of rice straw.

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The Correlations between Microstructures and Color Properties of Nanocrystalline Cellulose: A Concise Review

Zhu,

Zhou,

Wang

et al. 2024

Polymers

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Cellulose nanocrystals (CNCs) are a green resource which can produce photonic crystal films with structural colors in evaporation-induced self-assembly; CNC photonic crystal films present unique structural colors that cannot be matched by other colored materials. Recently, the mechanisms of CNC photonic crystal films with a unique liquid crystal structure were investigated to obtain homogenous, stable, and even flexible films at a large scale. To clarify the mechanism of colorful CNC photonic crystal films, we briefly summarize the recent advances from the correlations among the preparation methods, microstructures, and color properties. We first discuss the preparation process of CNCs, aiming to realize the green application of resources. Then, the behavior of CNCs in the formation of liquid crystal phases is studied, considering the influence of the CNCs’ size and shape, surface properties, and the types and concentrations of solvents. Finally, the film formation process of CNCs and the control of structural colors during the film formation are summarized, as well as the mechanisms of CNC photonic crystal films with full color. In summary, considering the above factors, obtaining reliable commercial CNC photonic crystal films requires a comprehensive consideration of the subsequent preparation processes starting from the preparation of CNCs.

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Highly efficient preparation of cellulose nanocrystals by mechano-enzymatic hydrolysis: a mechanism study

Abstract: One-step mechano-enzymatic hydrolysis (MEH) method was developed to prepare cellulose nanocrystals (CNCs) under liquid-assited grinding (LAG) conditions. The mechanism of MEH to afford high yields of CNCs was elucidated that...

Cited by 3 publications

References 38 publications

Novel Mechanoenzymatic Strategy for Lignin Depolymerization

Novel Mechanoenzymatic Strategy for Lignin Depolymerization

Enhancing Enzymatic Hydrolysis of Rice Straw by Acid-Assisted Mechanocatalytic Depolymerization Pretreatment

The Correlations between Microstructures and Color Properties of Nanocrystalline Cellulose: A Concise Review

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