Preparation method of PEDOT: PSS poly-ampholyte composite material

The PEDOT:PSS@polyampholyte composite material was prepared by iCVD method, which solved the problems of slow response speed and low sensitivity of existing humidity-sensitive materials in high-precision humidity sensing, and realized a humidity sensor with high sensitivity and fast response.

CN120795388APending Publication Date: 2025-10-17FUJIAN NORMAL UNIV
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Patent Information

Application Number
CN202510995098.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-18
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

Existing humidity-sensitive materials have slow response speed and low sensitivity in high-precision humidity sensing, and their performance is poor at room temperature. Materials prepared by liquid phase method may damage the flexible substrate and affect the sensor performance.

Method used

PEDOT:PSS@polyampholyte composite material was prepared by iCVD method. A zwitterionic polymer was formed by copolymerization of DMAEMA and MAA, and the porosity was controlled by combining EGDMA crosslinking agent. PEDOT:PSS was spin-coated on the polymer surface to form a conductive path and realize hole-ion coupling.

Benefits of technology

The response performance of the humidity sensor is improved, with high sensitivity, small hysteresis and short recovery time, making it suitable for real-time humidity detection.

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Abstract

The invention belongs to the technical field of humidity-sensitive materials, and particularly relates to a preparation method of a PEDOT: PSS poly-ampholyte composite material. The preparation method comprises the following steps: preparing a hydrophilic polyampholyte by adopting an initiating chemical vapor deposition method (iCVD), and preparing the hydrophilic polyampholyte on the surface of a flexible polyimide interdigital electrode by taking dimethylaminoethyl methacrylate and methacrylic acid as hydrophilic monomers and ethylene glycol dimethacrylate as a cross-linking agent to form a polyampholyte polymer film; and then spin-coating a conductive polymer PEDOT: PSS on the surface of the film to successfully prepare the PEDOT: PSS poly-ampholyte composite material. The humidity sensor prepared from the PEDOT: PSS poly-ampholyte composite material has the advantages of high sensitivity, small lag, short recovery time and the like.
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