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Preparation method of PVDF/modified reduced graphene oxide composite membrane, composite membrane and sensor

A graphene composite and graphene technology, which is applied to the measurement of the force of the piezoelectric device, flat products, household appliances, etc., can solve the problems of low sensitivity of the composite film and the inability to adapt to the development requirements of the refined flexible pressure sensor. , to achieve the effect of improving mechanical properties and improving sensitivity

Active Publication Date: 2022-02-01
INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG +1
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Problems solved by technology

The sensitivity of the composite membrane formed by the above method is low, which cannot meet the development requirements of the refinement of flexible pressure sensors.

Method used

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  • Preparation method of PVDF/modified reduced graphene oxide composite membrane, composite membrane and sensor
  • Preparation method of PVDF/modified reduced graphene oxide composite membrane, composite membrane and sensor

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preparation example Construction

[0037] figure 1 Shown is the schematic flow sheet of the preparation method of the PVDF / modified reduced graphene oxide composite membrane provided by the embodiment of the present invention, figure 2 Shown is the SEM picture of the surface of the PVDF / modified reduced graphene oxide composite membrane prepared by the preparation method of the PVDF / modified reduced graphene oxide composite membrane provided by the present invention. Such as figure 1 Shown, the preparation method of PVDF / modified reduced graphene oxide composite film provided by the invention comprises the steps:

[0038] S1: Provide graphene oxide dispersion liquid and PVDF (polyvinylidene fluoride polyvinylidene fluoride) fiber membrane;

[0039] S2: Destroy the two-dimensional structure of the PVDF fiber membrane, and stir and mix it with the graphene oxide dispersion to obtain PVDF fibers and graphene oxide dispersion;

[0040] S3: re-form the PVDF fiber and graphene oxide dispersion into a film to obta...

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Abstract

A method for preparing a PVDF / modified reduced graphene oxide composite membrane, a composite membrane and a sensor, the method comprising: destroying the two-dimensional structure of the PVDF fiber membrane to make it monofilament or bundle, and mixing it with a graphene oxide dispersion Stir and mix to obtain the PVDF fiber and graphene oxide dispersion; re-form the PVDF fiber and graphene oxide dispersion into a film, and perform silane modification on the PVDF / graphene oxide composite film. The preparation method enables the modified reduced graphene oxide to be coated on the PVDF fiber, which can significantly improve the sensitivity of a pressure sensor made from the PVDF / modified reduced graphene oxide composite membrane.

Description

technical field [0001] The invention relates to the technical field of flexible equipment, in particular to a method for preparing a PVDF / modified reduced graphene oxide composite membrane, the composite membrane and a flexible pressure sensor with the composite membrane. Background technique [0002] Wearable sensors can realize continuous and non-invasive detection of various indicators of the human body, and are playing an increasingly important role in modern medical detection. For example, flexible pressure sensors can be introduced into clothing to monitor physiological signals such as heart rate and pulse, or pressure sensors can be added to shoes to monitor the user's plantar pressure, gait, and assess exercise status and injuries. [0003] According to its principle, pressure sensors can be divided into piezoresistive, capacitive and piezoelectric. Among them, piezoelectric sensors have the advantages of fast response, wide range and no need for external energy, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/01G01L1/16
CPCB29D7/01G01L1/16
Inventor 冯雪肖建亮陈颖
Owner INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG