Hydrogen bond reconstruction strategy for eutectic solvents that realizes room-temperature dissolution of cellulose

Tong, Zhihan; Wang, Wen; Zeng, Suqing; Sun, Yaxu; Meng, Juan; Liu, Yongzhuang; Xia, Qinqin; Yu, Haipeng

doi:10.1039/d2gc03372k

Cited by 23 publications

(18 citation statements)

References 35 publications

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“…When Fe 3+ ions are removed and the sample is dried, new hydrogen bonds are formed between the antiparallel assignment of cellulose chains, generating a cellulose II crystalline structure. This proposed polymorph transformation mechanism of cellulose is consistent with the previous literature (e.g., mercerization, dissolution-regeneration, and acidic lithium bromide trihydrate treatment). ,, …”

Section: Resultssupporting

confidence: 91%

“…This effect minimizes the energy consumption in CNC production. Moreover, the BEP fibers swell in molten FeCl 3 ·6H 2 O under mild conditions (e.g., 70 and 80 °C), − increasing the accessibility of H + and cellulose molecular chains and making it possible to rapidly cut the cellulose molecular chain. The hydrolytic degree of BEP in molten FeCl 3 ·6H 2 O was monitored by analyzing the yield, DP, and morphology of the WIS (Figure ).…”

Section: Resultsmentioning

confidence: 99%

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Cellulose Nanocrystal Preparation via Rapid Hydrolysis of Wood Cellulose Fibers Using Recyclable Molten Ferric Chloride Hexahydrate

Yang

Mei

Feng

et al. 2023

ACS Sustainable Chem. Eng.

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Cellulose nanocrystals (CNCs) are clean and sustainable materials that have drawn significant attention in academia and industry because of their unique physicochemical properties. However, realizing economical and environmentally friendly production of CNCs remains a challenge. In this study, we proposed an innovative strategy to fabricate CNCs, which involves the acid hydrolysis pretreatment of wood cellulose fibers using innocuous and recyclable ferric chloride hexahydrate (FeCl 3 • 6H 2 O). During the molten FeCl 3 •6H 2 O treatment, the degree of polymerization (DP) of the cellulose fibers sharply decreased, along with the transformation of cellulose I to cellulose II crystallites. Molten FeCl 3 •6H 2 O quickly hydrolyzed cellulose fibers within 5 min at 80 °C, inducing a rapid decrease in the DP from 922 to 196, and the water-insoluble solid (WIS) retention reached 80.1%. CNCs were successfully produced from the mechanical disintegration of the WIS with a low energy input. Hence, the yield of CNCs is consistent with that of the WIS. Interestingly, the CNCs exhibited typical cellulose II crystallites, which were significantly different from those of the cellulose feedstock (cellulose I). Detailed characterization revealed that the CNCs had tunable numberaveraged heights of 10.4−26.9 nm and high thermal stability (a maximal weight loss temperature of 327 °C). Most notably, FeCl 3 • 6H 2 O was easily recycled from the hydrolysate after hydrolysis, with a high recovery of 94.0−94.5 wt %, using simple concentration and crystallization technologies. Thus, this study proposes a novel production technology for CNCs that is both economical and ecofriendly, providing new ideas for clean and large-scale production of CNCs.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Cellulose Nanocrystal Preparation via Rapid Hydrolysis of Wood Cellulose Fibers Using Recyclable Molten Ferric Chloride Hexahydrate

Yang

Mei

Feng

et al. 2023

ACS Sustainable Chem. Eng.

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“…Finally, with the synergetic effect of anion and cation, the hydrogen bond of cellulose is broken and dissolved in the solvent. After that, the introduction of water breaks the hydrogen bond networks between ionic liquid and cellulose, causing cellulose molecular chains self‐aggregation and forming a new hydrogen bonding network 3 . In result, the off‐white powder transformed into hydrogel and transparent cellulose‐based bioplastic, which displayed excellent mechanical properties and had a tensile strength of 127 MPa.…”

Section: Resultsmentioning

confidence: 99%

“…1,2 Thus, the utilization of renewable resources and exploitation of biodegradable materials alternative to petrochemical plastics have attracted intense attention in recent years. [3][4][5] Cellulose is considered as an inexhaustible resource among the most abundant, renewable, and natural resources in the earth, which is a potential candidate for petroleum-derived synthetic polymers because of its low-cost and abundant. 6,7 The consumption of paper and paper products have increased sharply all the world because of the rapid development of social economy, that brings numerous waste paper emergence (420 million tons in the global).…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the non‐biodegradability of plastics has caused severe and lasting environmental issues after being discarding 1,2 . Thus, the utilization of renewable resources and exploitation of biodegradable materials alternative to petrochemical plastics have attracted intense attention in recent years 3–5 . Cellulose is considered as an inexhaustible resource among the most abundant, renewable, and natural resources in the earth, which is a potential candidate for petroleum‐derived synthetic polymers because of its low‐cost and abundant 6,7 …”

Section: Introductionmentioning

confidence: 99%

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A strong, biodegradable and transparent cellulose‐based bioplastic stemmed from waste paper

Liu

Tong

et al. 2023

J of Applied Polymer Sci

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It is crucial and significant to boost the utilization of renewable resources and exploitation of biodegradable materials alternative to petrochemical plastics. Waste paper, mainly composed of cellulose (82-95 wt%) and derived from the lignocellulose, is a type of abundant, renewable, and biodegradable resource, whose recycling use and conversion to high value-added products can reduce the pressure on the environment and exert immense economic benefits.Herein, four kinds of common waste paper (e.g., printing paper, newspaper, straw paper and roll paper) were converted into cellulose-based bioplastic membranes by using ionic liquid 1-butyl-3-methyl-imidazolium chloride as solvent. The cellulose-based membranes are smooth and compact, and their mechanical strength is prominently improved about 3-100 times comparison with the original paper. The maximum tensile strength of the film (F4) is over 127 Mpa and its optical transmittance reaches 80% at 450-800 nm wavelength.Besides, this kind of cellulose-based films have excellent biodegradability. Thus, the results demonstrated that the cellulose-based bioplastic membranes stemmed from waste paper possess a magnificent application prospect.

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Insights into the critical role of anions in nanofibrillation of cellulose in deep eutectic solvents

Zhang,

Dai,

Zhang

et al. 2024

Cellulose

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Hydrogen bond reconstruction strategy for eutectic solvents that realizes room-temperature dissolution of cellulose

Abstract: Cellulose with numerous hydroxyl groups and electronegative atoms can form extensive hydrogen bonds, which are nonnegligible recalcitrants to dissolution and to further utilizations. Herein, an indepth understanding of the interactions...

Cited by 23 publications

References 35 publications

Cellulose Nanocrystal Preparation via Rapid Hydrolysis of Wood Cellulose Fibers Using Recyclable Molten Ferric Chloride Hexahydrate

Cellulose Nanocrystal Preparation via Rapid Hydrolysis of Wood Cellulose Fibers Using Recyclable Molten Ferric Chloride Hexahydrate

A strong, biodegradable and transparent cellulose‐based bioplastic stemmed from waste paper

Insights into the critical role of anions in nanofibrillation of cellulose in deep eutectic solvents

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