Nanoscale: Bio-inspired wood-like MXene@GO coaxial fiber

MXenes, as a new two-dimensional material with outstanding performance, is a very promising material in the field of wearable energy storage devices. However, the insufficient contact between MXene nanosheets makes it difficult to extend the advantages of the nanoscale to the macropore scale. In addition, the easy oxidation of MXene itself limits its practical application. Recently, Professor Jianjun Jiang and Professor Yujun Li of Northwestern Polytechnical University published a research article titled Bioinspired wood-like coaxial fibers based on MXene@graphene oxide with superior mechanical and electrical properties in the international high-level academic journal Nanoscale. Inspired by MXene@graphene oxide fiber with a bionic core-shell structure, the GO layer is easily assembled in MXene to prevent its oxidation. The assembled core-shell MX@GO fiber tactics in addition to high tensile strength (290 MPa) and outstanding electronic conductivity (2400 S m-1).
 

Figure 1. Schematic diagram of the coaxial wet spinning process of MX@GO.
 

Figure 2. Micro-morphology characterization of MX@GO fiber.
 

Figure 3. Mechanical performance test of different samples.
 

Figure 4. Comparison of mechanical properties under different variables.

Figure 5. Electronic and mechanical properties of MX@GO fiber under different variables.

In summary, inspired by the structure of wood, researchers have proposed a simple and low-cost method to synthesize wood-like MX@GO fibers. It has high tensile strength, electronic conductivity and good temperature characteristics (30% recovery at 100°C, 1800 S m-1). Compared with other MXene films, the performance is improved by 133%. The highly conductive MX@GO-1 fiber has excellent electromagnetic shielding performance, with 70 dB in the full X-band frequency range. Compared with MX@GO, the mechanical and electronic properties of this bionic fiber can be freely designed as required without any chemical post-treatment process.
Literature link:
DOI: 10.1039/d0nr04928j

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