Bacterial cellulose / silver nanowire / MXene composite conductive film and preparation method thereof

By constructing a bacterial cellulose/silver nanowire/MXene composite conductive film, the problems of flexibility and thickness of traditional metal materials in the field of flexible electronics have been solved, achieving a synergistic improvement in efficient electromagnetic interference shielding and electrothermal performance, which is suitable for long-term stable application of flexible electronic devices.

CN121662487APending Publication Date: 2026-03-13天津柔电科技有限公司
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Patent Information

Application Number
CN202610054126.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-15
Publication Date
2026-03-13

AI Technical Summary

Technical Problem

In existing technologies, traditional metal materials used in electromagnetic interference shielding materials in the field of flexible electronics suffer from poor flexibility, large thickness, and poor mechanical properties. Furthermore, blending single-function materials makes it difficult to fully leverage synergistic effects, thus limiting the development potential of multi-functional integration.

Method used

A method for preparing bacterial cellulose/silver nanowires/MXene composite conductive films was adopted. An MXene conductive layer and a silver nanowire conductive network layer were constructed through a vacuum filtration process to form a three-dimensional conductive network. Combined with hydrogen bonding interactions, this achieved efficient electromagnetic interference shielding and electrothermal performance.

Benefits of technology

It achieves high-efficiency electromagnetic interference shielding, excellent mechanical stability and rapid electrothermal response. The film has high tensile strength and low sheet resistance, making it suitable for long-term stable application of flexible electronic devices.

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Abstract

The invention discloses a bacterial cellulose / silver nanowire / MXene composite conductive film and a preparation method thereof, and relates to the technical field of flexible conductive materials. The composite film comprises a bacterial cellulose substrate, an MXene conductive layer and a silver nanowire conductive network layer. The preparation method comprises the following steps: S1, preparing bacterial cellulose dispersion liquid; s2, preparation of an MXene dispersion liquid; s3, preparing a silver nanowire dispersion liquid; and S4, preparing the composite film. The composite film with a Janus structure is prepared through a vacuum-assisted layer-by-layer filtering process, and the composite film has high mechanical performance, low square resistance, excellent electromagnetic interference shielding effectiveness, rapid Joule heating performance and excellent environmental stability and mechanical durability. The problem that an existing flexible electromagnetic shielding material is difficult to consider ultrathin performance, high flexibility, strong mechanical performance and multifunctional integration is solved, and the flexible electromagnetic shielding material has wide application prospects in the fields of electromagnetic shielding, flexible electronic devices, wearable heaters and the like.
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