Transforming ground mica into high-performance biomimetic polymeric mica film

Pan, Xiaofeng; Gao, Huai‐Ling; Lu, Yang; Wu, Chunyan; Wu, Yadong; Wang, Xiangying; Pan, Zengxiang; Dong, Liang; Song, Yonghong; Cong, Huai‐Ping; Yu, Shu‐Hong

doi:10.1038/s41467-018-05355-6

Cited by 117 publications

(79 citation statements)

References 42 publications

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“…For as-exfoliated 2D TiOx, mica and Bi2Te3, the characteristic absorption bands are almost at the same positions as those of the raw bulk materials ( Supplementary Fig. S12) and previous reports [38,39] In addition, for Bi2Te3 the appearance of a prominent absorption peak at 265 nm reveals the production of few layer 2D Bi2Te3. [40] These results confirm that the iMAGE-produced 2D materials have good structural integrity rather than having been functionalized.…”

Section: Resultssupporting

confidence: 78%

Mass production of 2D materials by intermediate-assisted grinding exfoliation

Zhang

Tan

Pan

et al. 2019

National Science Review

110

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The scalable and high-efficiency production of 2D materials is a prerequisite to their commercial use. Currently, only graphene and graphene oxide can be produced on a ton scale, and the inability to produce other 2D materials on such a large scale hinders their technological applications. Here we report a grinding exfoliation method that uses micro-particles as force intermediates to resolve applied compressive forces into a multitude of small shear forces, inducing the highly efficient exfoliation of layer materials. The method, referred to as intermediate-assisted grinding exfoliation (iMAGE), can be used for the large-scale production of many 2D materials. As an example, we have exfoliated bulk h-BN into 2D h-BN with large flake sizes, high quality and structural integrity, with a high exfoliation yield of 67%, a high production rate of 0.3 g h−1 and a low energy consumption of 3.01 × 106 J g−1. The production rate and energy consumption are one to two orders of magnitude better than previous results. Besides h-BN, this iMAGE technology has been used to exfoliate various layer materials such as graphite, black phosphorus, transition metal dichalcogenides, and metal oxides, proving its universality. Molybdenite concentrate, a natural low-cost and abundant mineral, was used as a demo for the large-scale exfoliation production of 2D MoS2 flakes. Our work indicates the huge potential of the iMAGE method to produce large amounts of various 2D materials, which paves the way for their commercial application.

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Section: Resultssupporting

confidence: 78%

Mass production of 2D materials by intermediate-assisted grinding exfoliation

Zhang

Tan

Pan

et al. 2019

National Science Review

110

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“…In contrast, a crack in the bioinspired E-GC-III nanocomposite grows in a tortuous way, as shown in Figure 4B and Video S2. During crack propagation, crack deflection and crack branching, which are the main contributors to the extrinsic toughening of E-GC-III nanocomposite, dissipate a large amount of energy, [49][50][51][52][53] as shown in Figures 4B-4D. In addition, frictional slide between the epoxy layers can also dissipate energy in the process of crack propagation because of the rough interfaces of the E-GC-III nanocomposite ( Figure 4D).…”

Section: Investigation Of Fracture Processmentioning

confidence: 99%

Inverse Nacre-like Epoxy-Graphene Layered Nanocomposites with Integration of High Toughness and Self-Monitoring

Peng

Huang

Cao

et al. 2020

Matter

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Inverse nacre-like epoxy-graphene layered nanocomposites inspired by nacre are fabricated via freeze casting. The epoxy-graphene nanocomposites show a toughening mechanism that incorporates crack deflection, branching, and interfacial friction, exhibiting excellent fracture toughness. Furthermore, due to the conductive properties of the continuous graphene-based scaffold, crack propagation can be monitored by detecting variable electrical resistance. The inverse nacre-like epoxy-graphene nanocomposites expand the application of traditional epoxy-graphene nanocomposites in the engineering design of wind devices and in the automotive industry, aerospace, and many other areas. In addition, the nanocomposite's ability to detect cracks could inspire the design of future nanocomposites with self-monitoring capabilities, thus making them more safe and secure.

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“…The interest is still undiminished due to the modified structural and dielectric properties of micas upon irradiation and the fact that they combine high working temperature and flexibility as dielectric materials, making them potential candidates for high-temperature energy storage applications [26][27][28][29]. Other peculiar applications concern the use of mica as a potential gate dielectric in organic field-effect transistors (OFETs), as a substrate for biological samples preparation for high resolution microscopy and in the assembly of macroscopic biomimetic polymeric mica films [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Complex Electrical Conductivity of Biotite and Muscovite Micas at Elevated Temperatures: A Comparative Study

2020

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The unique physicochemical, electrical, mechanical, and thermal properties of micas make them suitable for a wide range of industrial applications, and thus, the interest for these kind of hydrous aluminosilicate minerals is still persistent, not only from a practical but also from a scientific point of view. In the present work, complex impedance spectroscopy measurements were carried out in muscovite and biotite micas, perpendicular to their cleavage planes, over a broad range of frequencies (10−2 Hz to 106 Hz) and temperatures (473–1173 K) that have not been measured so far. Different formalisms of data representation were used, namely, Cole-Cole plots of complex impedance, complex electrical conductivity and electric modulus to analyze the electrical behavior of micas and the electrical signatures of the dehydration/dehydroxylation processes. Our results suggest that ac-conductivity is affected by the structural hydroxyls and the different concentrations of transition metals (Fe, Ti and Mg) in biotite and muscovite micas. The estimated activation energies, i.e., 0.33–0.83 eV for biotite and 0.69–1.92 eV for muscovite, were attributed to proton and small polaron conduction, due to the bound water and different oxidation states of Fe.

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Transforming ground mica into high-performance biomimetic polymeric mica film

Cited by 117 publications

References 42 publications

Mass production of 2D materials by intermediate-assisted grinding exfoliation

Mass production of 2D materials by intermediate-assisted grinding exfoliation

Inverse Nacre-like Epoxy-Graphene Layered Nanocomposites with Integration of High Toughness and Self-Monitoring

Complex Electrical Conductivity of Biotite and Muscovite Micas at Elevated Temperatures: A Comparative Study

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