Flexible and ultrathin electrospun regenerate cellulose nanofibers and d-Ti3C2Tx (MXene) composite film for electromagnetic interference shielding

Cui, Ce; Xiang, Cheng; Geng, Limin; Lai, Xiaoming; Guo, Ronghui; Zhang, Yong; Xiao, Hongyan; Lan, Jianwu; Song, Lin; Jiang, Shou-xiang Kinor

doi:10.1016/j.jallcom.2019.02.294

Cited by 118 publications

(58 citation statements)

References 51 publications

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“…For P‐20M, the SE A value was greater than the SE R value, indicating that EMI shielding due to absorption was the dominant mechanism rather than reflection. This is mainly attributed to the multilayer structure of MXenes, which promotes the multiple internal reflection and results in energy dissipation of the electromagnetic waves . For P‐10N, the SE A value was also greater than the SE R value, but when Ni chain content increased to 20 wt%, the SE R value showed an obvious rise and surpassed the SE A value.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Effects between MXenes and Ni Chains in Flexible and Ultrathin Electromagnetic Interference Shielding Films

Wang

Jiang

2019

Adv Materials Inter

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and easy corrosion. [2] By contrast, conductive polymer composites, consisting of conductive fillers inserted in a polymer matrix, have drawn increasing attention from researchers due to their lightweight, good processability, chemical stability, and structural flexibility. [3] These promising potential conductive polymer composites, particularly high-performance and ultrathin ones, are expected to be used as EMI shielding materials in soft and flexible electronic devices in the future, such as foldable phones and wearable devices. [4] MXenes, an emerging family of 2D transition metal carbides and/or nitrides, possess a formula M n+1 X n T x , where M is an early transition metal, X is carbon and/or nitrogen, n = 1, 2, or 3, and T x denotes the surface termination groups (O, OH, and F). [5] MXenes exhibit efficient electron transport and dipole polarization attributing to their surface termination groups and intrinsic defects, which are conducive to attenuating electromagnetic wave. [6] Compared to the well-studied carbon-based materials, such as carbon nanotubes and graphene, MXenes integrating metallic conductivity and versatile surface chemistry are considered as more promising EMI shielding materials for next-generation portable and wearable smart devices. [7] The discoverers of MXenes, Gogotsi and co-workers reported the freestanding Ti 3 C 2 T x MXene film (thickness 45 µm) with a superior EMI shielding effectiveness (SE) of 92 dB. [8] Liu et al. [9] subsequently prepared a lightweight MXene foam via hydrazine-induced foaming process. Compared to unfoamed MXene film (thickness 6 µm), after foaming, the favorable porous structure further improves EMI SE from 53 to 70 dB. It is noticeable that the EMI SE of MXenes exceeds many carbon-based materials. [7a,10] Nevertheless, compared with the prosperity of carbon-based conductive polymer composites, the development of MXene-based ones is still in an infant stage. Introducing MXenes into different polymer matrices is one of the simplest and most effective preparation strategies. MXene/polyacrylamide nanocomposite films have an electrical conductivity of 3.3 S m −1 with 75 wt% MXene loading. [11] The electrical conductivity of MXene/polyvinyl alcohol films is 1.3 S m −1 when MXene loading is 60 wt%. [12] The electrical conductivity and EMI SE of MXene/cellulose nanofiber composite paper (thickness 74 µm) are 115.5 S m −1 and 25.8 dB, respectively, at a high MXene loading of 80 wt%. [10] MXene/sodium Developing high-performance electromagnetic interference (EMI) shielding materials has become increasingly important along with the upcoming 5G communication era and the boom of wearable devices. However, the large thickness and poor mechanical properties of most of EMI shielding materials cannot satisfy the above critical requirements. Here, flexible and ultrathin poly(vinylidene fluoride) (PVDF)/MXene/Ni chain composite films are fabricated. Interestingly, by combining quasi-1D Ni chains and 2D MXenes, the average EMI shielding effectiveness of the PVDF/MXene...

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Section: Resultsmentioning

confidence: 99%

Synergistic Effects between MXenes and Ni Chains in Flexible and Ultrathin Electromagnetic Interference Shielding Films

Wang

Jiang

2019

Adv Materials Inter

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“…For instance, cellulose nanofibers have been obtained via direct electrospinning by using NMMO (one of the most popular cellulose solvents), lithium chloride/dimethylacetamide (LiCl/DMAc), or ionic solvents,nsuch as 1-ethyl-3 methylimidazolium acetate 1-ethyl-3 methylimidazolium acetate (EmimAc) [86]; however, these processes are cumbersome and very expensive. This has limited the use of cellulose in nanofibrous constructs for wound healing and has increased the use of cellulose derivatives, particularly CA [87]. The surface of all studied fibers appeared to be smooth; Fibers spun from CWG had higher molecular weight than standard lyocell fibers; ReCell-2 exhibited superior mechanical and molecular properties in relation to the typical fibers regenerated from wood pulp.…”

Section: Cellulosementioning

confidence: 99%

Electrospun Nanocomposites Containing Cellulose and Its Derivatives Modified with Specialized Biomolecules for an Enhanced Wound Healing

et al. 2020

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Wound healing requires careful, directed, and effective therapies to prevent infections and accelerate tissue regeneration. In light of these demands, active biomolecules with antibacterial properties and/or healing capacities have been functionalized onto nanostructured polymeric dressings and their synergistic effect examined. In this work, various antibiotics, nanoparticles, and natural extract-derived products that were used in association with electrospun nanocomposites containing cellulose, cellulose acetate and different types of nanocellulose (cellulose nanocrystals, cellulose nanofibrils, and bacterial cellulose) have been reviewed. Renewable, natural-origin compounds are gaining more relevance each day as potential alternatives to synthetic materials, since the former undesirable footprints in biomedicine, the environment, and the ecosystems are reaching concerning levels. Therefore, cellulose and its derivatives have been the object of numerous biomedical studies, in which their biocompatibility, biodegradability, and, most importantly, sustainability and abundance, have been determinant. A complete overview of the recently produced cellulose-containing nanofibrous meshes for wound healing applications was provided. Moreover, the current challenges that are faced by cellulose acetate- and nanocellulose-containing wound dressing formulations, processed by electrospinning, were also enumerated.

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“…Importantly, the 2D layered nature of MXenes can offer an interlayer space to hold a range of mono-and multi-valent cations, the polar organic molecules, and nanoparticels [15][16][17] . The space confined by the adjacent MXene layers can be also employed to encapsulate the nanowires [18] , nanosheets [19] and other layered materials [20] . Moreover, the polymer can be filled in the space to form hybrids [21] .…”

Section: Introductionmentioning

confidence: 99%

There is plenty of space in the MXene layers: The confinement and fillings

Han

et al. 2020

Journal of Energy Chemistry

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Flexible and ultrathin electrospun regenerate cellulose nanofibers and d-Ti3C2Tx (MXene) composite film for electromagnetic interference shielding

Cited by 118 publications

References 51 publications

Synergistic Effects between MXenes and Ni Chains in Flexible and Ultrathin Electromagnetic Interference Shielding Films

Synergistic Effects between MXenes and Ni Chains in Flexible and Ultrathin Electromagnetic Interference Shielding Films

Electrospun Nanocomposites Containing Cellulose and Its Derivatives Modified with Specialized Biomolecules for an Enhanced Wound Healing

There is plenty of space in the MXene layers: The confinement and fillings

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