Flexible cellulose nanopaper with high wet tensile strength, high toughness and tunable ultraviolet blocking ability fabricated from tobacco stalk <i>via</i> a sustainable method

Wang, Qingbo; Du, Hao; Zhang, Fang; Zhang, Yuedong; Wu, Meiyan; Yu, Guang; Liu, Chao; Li, Bin; Peng, Hui

doi:10.1039/c8ta01986j

Cited by 136 publications

(88 citation statements)

References 60 publications

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“…bisporus fruiting body derived nanopapers (~87°) and cellulose nanopapers (~19-90° depending on their lignin content) [43][44][45] ( Figure 7). The hydrophobicity of mycelium-derived materials has previously been noted, with static water contact angles from 115-122° reported.…”

Section: Surface Properties Of the Nanopapersmentioning

confidence: 99%

Waste-Derived Low-Cost Mycelium Nanopapers with Tunable Mechanical and Surface Properties

et al. 2019

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Mycelium, the vegetative growth of filamentous fungi, has attracted increasing commercial and academic interest in recent years due to its ability to upcycle agricultural and industrial wastes into low-cost, sustainable composite materials. However, mycelium composites typically exhibit foam-like mechanical properties, primarily originating from their weak organic filler constituents. Fungal growth can be alternatively utilised as a low-cost method for ondemand generation of natural nanofibrils, such as chitin and chitosan, which can be grown and isolated from liquid wastes and by-products in the form of fungal micro-filaments. This study characterised polymer extracts and nanopapers produced from a common mushroom reference and various species of fungal mycelium grown on the sugarcane by-product molasses. Polymer yields of ~10-26% were achieved, which is comparable to those of crustacean-derived chitin, and the nanopapers produced exhibited much higher tensile strengths than existing mycelium materials, with values of up to ~25 MPa (mycelium) and ~98 MPa (mushroom), in addition to useful hydrophobic surface properties resulting from the presence of organic lipid residues in the nanopapers. HCl or H 2 O 2 treatments were used to remove these impurities facilitating tuning of mechanical, thermal and surface properties of the nanopapers produced. This potentially enables their use in a wide range of applications including coatings, membranes, packaging and paper.

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Section: Surface Properties Of the Nanopapersmentioning

confidence: 99%

Waste-Derived Low-Cost Mycelium Nanopapers with Tunable Mechanical and Surface Properties

et al. 2019

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“…Comparing to a reported work, it can be found that the Young’s modulus of AuNCs@CNF films had the comparative values than that of wound healing from various bacterial cellulose-based composites, which had the Young’s modulus of 4.2–6.1 GPa ( Ul-Islam et al, 2012 ) and 7.0 GPa ( Kim et al, 2011 ). In the present study, although the tensile strength of the AuNCs@CNF film was reduced with the increasing addition of AuNCs, the enhanced flexibility indicated that the AuNCs@CNF film possessed high folding strength, making it resistant to fracture (deformability) when used as the antibacterial film for application as the dressing over wound surface ( Li et al, 2018 ; Wang et al, 2018 ).…”

Section: Discussionmentioning

confidence: 57%

“…All AuNCs@CNF films showed the decreased tensile strength and tensile strain of 43.2–54.1 MPa and 4.1–4.7%, respectively. Typically, the tensile properties of the cellulose film are related to single fibrils and interfibrillar bonding, which are linked to the chemical composition, aspect ratio, and the added ingredient ( Wang et al, 2018 ; Imani et al, 2019 ). Moreover, the CNF films consisted of AuNCs at the concentration of 0.05–0.1 mM had the lower Young’s modulus (4.7–2.1 GPa) than that of neat CNF film (5.9 GPa).…”

Section: Resultsmentioning

confidence: 99%

“…Generally, the excellent mechanical properties of high strength and flexibility of the films are required for the most advanced material design. However, the enhancement of strength and flexibility for the cellulose films are usually conflicted ( Wang et al, 2018 ). The Young’s modulus can be regarded as the indicator to evaluate the stiffness and resistance of a material for deforming ( Azevedo et al, 2013 ).…”

Section: Discussionmentioning

confidence: 99%

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Coupling Biocompatible Au Nanoclusters and Cellulose Nanofibrils to Prepare the Antibacterial Nanocomposite Films

Wang

Yin

Dong

et al. 2020

Front. Bioeng. Biotechnol.

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Cellulose nanofibrils (CNF) is considered as an inexhaustible precursor to produce antibacterial materials, such as antibacterial hydrogel, antibacterial paper, and antibacterial film. However, the poor antimicrobial property of neat CNF required it should be coupled with an antibacterial ingredient. Herein, biocompatible Au nanoclusters (AuNCs) were synthesized and added into the CNF dispersion to prepare a novel antibacterial film (AuNCs@CNF film). The effects of addition of AuNCs with different amount on the morphology and physicochemical properties of AuNCs@CNF films were characterized using atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray diffraction (XRD), FTIR (Fourier-transform infrared), light transmittance spectra, and thermogravimetric analysis (TGA). The results showed that AuNCs did not affect the nano-structural features of the CNF film and its basic structures, but could greatly increase the hydrophilicity, the flexibility and the thermal stability of CNF film, which might improve its application in antimicrobial wound-healing dressing. The prepared AuNCs@CNF films demonstrated high antibacterial properties toward Escherichia coli (E. coli) and Streptococcus mutans (S. mutans) both in vitro and in vivo, which can prohibit their growths and promote the healing of bacteria-infected wound, respectively. Thus, the prepared AuNCs@CNF film with great antibacterial properties could be applicable in biomedical field.

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“…[1] Among them, cellulose nanofibrils (CNFs)-based films have attracted remarkable attention for the controlled drug release, because CNFs have high aspect ratio, excellent mechanical properties, good biodegradability, and good cytocompatibility. [2,3] Moreover, the large amounts of hydroxyl or carboxyl groups are present on the surface of CNFs, which are appropriate for the formation of hydrogen bonds with hydrophilic drugs. [4][5][6][7][8][9] Biocompatibility is an important performance of the materials when used in drug application.…”

Section: Introductionmentioning

confidence: 99%

Polydopamine/Cellulose Nanofibrils Composite Film as Potential Vehicle for Drug Delivery

Liu

Wang

Qian-feng³

et al. 2018

ChemistrySelect

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Both cellulose nanofibrils (CNFs) and polydopamine (PDA) have attracted much attention due to their unique physical‐chemical properties and environmental benign nature. In this work, CNFs produced by 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO) ‐mediated oxidation (named as TOCNFs) were combined with PDA to prepare a novel pH/near‐infrared‐responsive (NIR) PDA/TOCNFs composite film, which was used for drug delivery. Tetracycline hydrochloride (TH) was used as a model drug. Results indicated that the TH loaded in the PDA/TOCNFs composite films could be released in an on‐demand fashion under NIR exposure or at lower pH conditions, and the mechanism of drug release was mainly driven by Case‐II transport. The prepared PDA/TOCNFs composite film can be a promising new drug delivery vehicle for the sustained drug release applications, attributing to their long time period drug releasing property, sensitive pH/NIR responses, as well as their biodegradability and biocompatibility.

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Flexible cellulose nanopaper with high wet tensile strength, high toughness and tunable ultraviolet blocking ability fabricated from tobacco stalk via a sustainable method

Abstract: Retaining residual lignin in nanopaper leads to UV-blocking ability and significantly improves mechanical performance, especially the toughness and wet strength.

Cited by 136 publications

References 60 publications

Waste-Derived Low-Cost Mycelium Nanopapers with Tunable Mechanical and Surface Properties

Waste-Derived Low-Cost Mycelium Nanopapers with Tunable Mechanical and Surface Properties

Coupling Biocompatible Au Nanoclusters and Cellulose Nanofibrils to Prepare the Antibacterial Nanocomposite Films

Polydopamine/Cellulose Nanofibrils Composite Film as Potential Vehicle for Drug Delivery

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