MXene aerogel fiber as well as preparation method and application thereof

Abstract

The invention discloses an MXene aerogel fiber as well as a preparation method and application thereof. The preparation method comprises the following steps of carrying out chemical etching treatment on an MAX phase material to obtain an MXene material, and forming an MXene dispersion liquid; and taking the MXene dispersion liquid as a spinning solution, preparing a MXene hydrogel fiber by adopting a spinning technology, and then drying the MXene hydrogel fibers to obtain the MXene aerogel fiber. The preparation method is simple and rapid, continuous large-scale preparation of the MXene aerogel fiber is facilitated, the prepared MXene aerogel fiber has a continuous MXene three-dimensional hierarchical pore network structure formed by lapping two-dimensional MXene sheet layers, the porosity is high, the specific surface area is large, the diameter is adjustable, the length-diameter ratio is large, the conductivity is high, the conductivity is excellent, the strength and the toughness are good, and the MXene aerogel fiber can be used in the fields of conductive yarns, electric heating, energy devices, composite materials, catalysis, antennas, electromagnetic shielding, wave absorption and the like.

Description

technical field [0001] The invention relates to a novel airgel fiber material, in particular to an MXene airgel fiber and its preparation method and application, and belongs to the technical field of nanoporous materials and functional fibers. Background technique [0002] Airgel is a highly dispersed solid material in which colloidal particles or polymer molecules aggregate to form a nanoporous network structure and the pores are filled with a gaseous dispersion medium. During the drying process of the wet gel, the liquid component in it is replaced by gas. 3D porous nanomaterials that still maintain their gel network. Airgel was first prepared by Sterven.S.Kistler of Stanford University in 1931 by hydrolyzing water glass with hydrochloric acid and supercritical drying technology. The three-dimensional continuous network structure of airgel and its high porosity (80% to 99.8%), high specific surface area, low density and low thermal conductivity make it widely used in ther...

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Problems solved by technology

[0004] Patent CN113101877A, patent CN109679146A and patent CN112011094A all disclose a kind of MXene airgel, but the MXene airgel material disclosed in the above-mentioned patents is mainly in block shape, its flexibility is poor, and its ability to be compiled is poor, which limits the MXene airgel Feasibility in emerging diversified application fields, such as flexible wearables, microelectronic circuits, microfluidic transportation, smart drives, smart fabrics, portable functional devices / equipment, etc.; in addition, the MXene airgel materials disclosed in the above patents are all It is a composite MXene airgel, and the addition of non-conductive nanocellulose as a second component will seriously affect the conductivity of the obtained MXene airgel

In addition, in the research literature of MXene aerogels, almost no MXene aerogel materials at the mesoscopic scale can be seen, especially MXene aerogels with fiber morphology have not been reported in the literature so far.

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