Favorable combination of foldability and toughness of transparent cellulose nanofibril films by a PET fiber-reinforced strategy

Zhang, Dejian; Li, Guanhui; Liu, Yu; Hou, Gaoyuan; Cui, Jinyi; Xie, Hong; Zhang, Shiman; Sun, Zeyu; Fang, Zhiqiang

doi:10.1016/j.ijbiomac.2020.08.196

Cited by 17 publications

(5 citation statements)

References 43 publications

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“…Mechanical properties of tough and strong cellulose films. (a) SEM image of cellulose microfibers, (b) diameter distribution of cellulose microfibers, (c) SEM image of cellulose nanofibers, (d) diameter distribution of cellulose nanofibers, (e) and (f) mechanical properties of cellulose films made by cellulose microfibers, (g) and (h) mechanical properties of cellulose films made by cellulose nanofibers, (i) WAXD patterns of cellulose films before and after stretching, and (j) toughness comparison with previous studies. ,,,,− …”

Section: Resultsmentioning

confidence: 94%

Tough and Strong All-Biomass Plastics from Agricultural and Forest Wastes via Constructing an Aggregate of Hydrogen-Bonding Networks

Xia

et al. 2023

ACS Sustainable Chem. Eng.

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The development of all-biomass materials to replace conventional plastics has been gradually becoming a focus. However, all-biomass plastics, especially those fabricated from agricultural and forestry wastes, have the obstacles of poor formability and/or low toughness. Herein, we demonstrated a facile, efficient, and easy-to-scale method to significantly improve the formability and toughness of biomass materials via constructing an aggregate of hydrogen-bonding networks, where the relatively weak hydrogen bonding could be sacrificed during stretching. After a continuous preparation process that combined a paper-making process with an in situ welding process, the regenerated cellulose material with a layered microstructure was spontaneously formed. The interlayer hydrogen-bonding interactions could dissipate energy during stretching. As a result, the cellulose plastics were tough and strong. The tensile strength, strain, and toughness reached 154.9 MPa, 57.7%, and 81.76 MJ/m3, respectively, which were markedly higher than those of previous cellulose-based materials. The corresponding cellulose hydrogel exhibited an excellent strength of 9.5 MPa and a high strain of 171.4% also. During this scalable process, a 1-ethyl-3-methylimidazolium acetate (EmimAc) aqueous solution worked as a dispersant and a solvent, and a high solid content of cellulose/EmimAc (20 wt %) was used. Based on such an effective method, various agricultural and forestry wastes, including corn straw, wheat straw, grass, and wood powder, could be directly processed into high-tough all-biomass films, indicating a huge potential in ecofriendly materials, environmental protection, and bioresource utilization.

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Section: Resultsmentioning

confidence: 94%

Tough and Strong All-Biomass Plastics from Agricultural and Forest Wastes via Constructing an Aggregate of Hydrogen-Bonding Networks

Xia

et al. 2023

ACS Sustainable Chem. Eng.

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“…The endurance result is consistent with the strain to failure data, and further supports the hypothesis that the grafted MA groups can sufficiently improve the ductility and flexibility of the resulting CNF nanopaper films. Amazingly, De-MA-CNF has an ultra-high folding endurance of 3.68 (corresponding to a folding number of 4943), which is one of the highest reported values for pristine CNF nanopaper films (98 for TEMPO-CNF, 21 4136 for carboxymethylation-CNF, 21 and 1153 for direct mechanically fibrillated CNF 67 ).…”

Section: Folding Endurancementioning

confidence: 92%

“…11,12 Moreover, the high cost 13 and toxicity 14 of TEMPO, together with difficulty in TEMPO recovery 15 restrain the further industrialization of TEMPO-treated CNFs (TEMPO-CNFs). Also, nanopaper films based on TEMPO-CNFs are normally very brittle in comparison with synthetic polymer films such as polyamide (PA) or polyethylene terephthalate (PET), 16,17 and they have relatively low toughness (typically <10 MJ m −3 ) [18][19][20] and inferior folding endurance (<2), 21 resulting in great limitations on many applications.…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly cellulose nanofibrils with high surface charge and aspect ratio for nanopaper films with ultrahigh toughness and folding endurance

Zhang,

Jin,

Lim

et al. 2023

Green Chem.

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“…Improvement in mechanical properties of paper by polymer addition. [49] D, photograph of PET fiber-reinforced cellulose nanofiber films; comparison of E, Toughness and F, Folding endurance of CNF films with different PET fiber contents. Copyright 2020 Elsevier substrate followed by PI encapsulating layer, composing PI/Si-CMOS/PI structure.…”

Section: Flexible Substratesmentioning

confidence: 99%

“…The favorable combination of foldability and toughness of CNF film was primarily ascribed to the uniform distribution and close packing of small-diameter PET fiber in the CNF network. [49] Furthermore, W. Cao et al presented an effective method to improve the folding resistance of CNF films by adding MXene. The d-Ti 3 C 2 T x /CNF composite paper exhibited up to 14,260 folding times under 4.9 N pulling load.…”

Section: Flexible Substratesmentioning

confidence: 99%

Foldable solar cells: Structure design and flexible materials

Wang

et al. 2021

Nano Select

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Foldable solar cells, with the advantages of size compactness and shape transformation, have promising applications as power sources in wearable and portable electronics, building and vehicle integrated photovoltaics. However, in contrast to mild bending with curvature radius of several millimeters, folding generates the crease with extreme curvature radius of sub‐millimeter, resulting in the appearance of large strain and stress. As a result, it is highly challenging to realize robustly foldable and highly efficient solar cells. Here, we summarize the recent progress on the photovoltaic performance and mechanical robustness of foldable solar cells. The key requirements to construct highly foldable solar cells, including structure design based on tuning the neutral axis plane, and adopting flexible alternatives including substrates, transparent electrodes and absorbers, are intensively discussed. In the end, some perspectives for the future development of foldable solar cells, especially the standard folding procedure, improvement in the folding endurance through revealing failure mechanism, are provided.

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Favorable combination of foldability and toughness of transparent cellulose nanofibril films by a PET fiber-reinforced strategy

Cited by 17 publications

References 43 publications

Tough and Strong All-Biomass Plastics from Agricultural and Forest Wastes via Constructing an Aggregate of Hydrogen-Bonding Networks

Tough and Strong All-Biomass Plastics from Agricultural and Forest Wastes via Constructing an Aggregate of Hydrogen-Bonding Networks

Eco-friendly cellulose nanofibrils with high surface charge and aspect ratio for nanopaper films with ultrahigh toughness and folding endurance

Foldable solar cells: Structure design and flexible materials

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