Preparation method of Alk-Ti3C2/PDMS flexible piezoresistive sensor

Abstract

The invention discloses a preparation method of a high-performance Alk-Ti3C2 / PDMS flexible piezoresistive sensor. The method comprises the following steps of: preparing a PDMS flexible film with a structured flexible substrate, synthesizing a conductive material two-dimensional MXene sheet (Ti3C2Tx) and a 3D wrinkle-shaped Alk-Ti3C2, then preparing an Alk-Ti3C2 / PDMS conductive film, and finally, assembling the Alk-Ti3C2 / PDMS conductive film and a flexible interdigital electrode together through glue to obtain the flexible piezoresistive sensor. According to the invention, an abrasive cloth isused as a template, so that the structured PDMS film is effectively obtained, and the pressure range of the sensor is widened; according to the invention, NaOH is utilized to optimize the structure ofthe two-dimensional material Ti3C2Tx, so that the stacking phenomenon of the material is effectively prevented, a unique wrinkle-shaped structure is obtained, and the sensitivity of the sensor is improved; the preparation method provided by the invention is simple, feasible and easy to operate, and the application field of the Ti3AlC2 ceramic material nano material is widened.

Description

technical field [0001] The invention belongs to the technical field of sensor material preparation, in particular to an Alk-Ti 3 C 2 Preparation method of PDMS flexible piezoresistive sensor material. Background technique [0002] Piezoresistive sensors can achieve efficient conversion from mechanical stimuli to electrical signals, so they play a vital role in human healthcare monitoring, intelligent robots, and human-machine interfaces. Therefore, flexible piezoresistive sensors have attracted extensive attention due to their simple principle and structure, and low cost. [0003] Due to the low cost, good flexibility and non-toxicity of polymer PDMS, it is often used as a flexible substrate material in piezoresistive sensing. In order to improve the sensitivity of the piezoresistive sensor and widen the pressure range, the researchers designed the structure of the flexible substrate. However, the etching method, sputtering method and other methods used often have comple...

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Problems solved by technology

However, since Ti 3 C 2 T x After chemical etching, the surface has harmful functional groups-F affects hydrophilicity, a single two-dimensional planar structure, easy to stack, resulting in Ti 3 C 2 T x The prepared piezoresistive sensor cannot take into account high sensitivity and wide pressure range at the same time, which limits the range of application fields of the prepared sensor

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