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Polyurethane-polypyrrole composite conductive structural color film and preparation method thereof

A polyurethane film and composite conductive technology, which is applied in the direction of material analysis by electromagnetic means, instruments, and analysis by making materials undergo chemical reactions, can solve the problems of reduced sensitivity, expensive instruments, and bulky volume, and achieve excellent conductivity. , high accuracy and high sensitivity

Pending Publication Date: 2022-03-22
WENZHOU INST UNIV OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Despite many advances, however, currently available instruments are often expensive, bulky, require professionally trained technicians, and cannot be used as home devices to monitor activities of daily living and health, especially in the elderly
In addition, the existing mechanical index monitoring instruments have single detection signals such as electrical signals and color signals, and their sensitivity is reduced, which largely limits the practical application of these instruments in the field of life and health.

Method used

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  • Polyurethane-polypyrrole composite conductive structural color film and preparation method thereof
  • Polyurethane-polypyrrole composite conductive structural color film and preparation method thereof
  • Polyurethane-polypyrrole composite conductive structural color film and preparation method thereof

Examples

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Embodiment 1

[0032] This embodiment provides a method for preparing a polyurethane-polypyrrole composite conductive structural color film, comprising the following steps:

[0033] (1) Preparation of polyurethane film with inverse opal structure

[0034] Prepare a 20% (wt%) silica nanoparticle solution with absolute ethanol, ultrasonicate 3 times, each time for 5 minutes, to ensure that the silica nanoparticles are completely dispersed in absolute ethanol, and then use a pipette to absorb the silica nanoparticles. Use a "scraper" to evenly scrape out a layer of silicon dioxide nanoparticle film on the glass slide with a "scraper" for the silicon nanoparticle solution (scraping film method). Repeat the process on the particle film. Calcinate the scraped silica nanoparticle film at 600°C for 4 hours to enhance the close-packed structure between the particles, which is the colloidal crystal positive template;

[0035] Using N,N-dimethylformamide (DMF) as a solvent, configure a polyurethane s...

Embodiment 2

[0042] This embodiment provides a method for preparing a polyurethane-polypyrrole composite conductive structural color film, comprising the following steps:

[0043] (1) Preparation of polyurethane film with inverse opal structure

[0044] Prepare a silica nanoparticle solution with a concentration of 2% (wt%) in absolute ethanol, sonicate 3 times, each time for 5 minutes, to ensure that the silica nanoparticles are completely dispersed in absolute alcohol, and prepare a colloidal crystal positive template by deposition . That is, place the glass slide vertically in the above solution, and let it stand for 3-5 days under the condition of 30% relative humidity. On the chip, and then calcined at 600 ° C for 4 hours to enhance the close-packed structure between the particles, which is the colloidal crystal positive template;

[0045] Using N,N-dimethylformamide (DMF) as a solvent, configure a polyurethane solution with a concentration of 20% (wt%), use a disposable dropper to ...

Embodiment 3

[0051] The polyurethane-polypyrrole composite conductive structural color film prepared in Example 1 was used for finger joint motion monitoring.

[0052] The prepared polyurethane-polypyrrole composite conductive structural color film was rinsed with deionized water for 3 times, then placed in an ultra-clean bench for ultraviolet sterilization for 4 hours, and then the polyurethane-polypyrrole composite conductive structural color film was pasted on the surface with 3M double-sided tape. For the finger joints, pay attention to covering the joints evenly, and then lead out conductive copper tapes on both sides of the polyurethane-polypyrrole composite conductive structural color film for real-time monitoring of electrical signals.

[0053] image 3 It is the polyurethane-polypyrrole composite conductive structural color film of the present invention used for finger joint motion monitoring images; wherein, Figure a is the structural color of the polyurethane-polypyrrole composi...

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Abstract

The invention provides a polyurethane-polypyrrole composite conductive structural color film and a preparation method thereof.The preparation method comprises the steps that a colloidal crystal positive template composed of silicon dioxide nanoparticles of a close packing structure is prepared through a self-assembly method, a polyurethane solution is dropwise added to the colloidal crystal positive template, polyurethane is fully permeated and cured, then the colloidal crystal positive template is removed, and the polyurethane-polypyrrole composite conductive structural color film is obtained; the inverse opal structure polyurethane film is obtained; the preparation method comprises the following steps: preparing an inverse opal structure polyurethane film, then performing plasma treatment, grafting pyrrole on the inverse opal structure polyurethane film, and finally synthesizing polypyrrole on the surface of the pyrrole-grafted inverse opal structure polyurethane film, thereby obtaining the polyurethane-polypyrrole composite conductive structural color film. The prepared film has excellent conductivity and bright structural color, the movement of a human body can be converted into an electric signal and an optical signal through stretching and releasing of the film, the mechanical index of the body is quantified by measuring resistance and reflection peak displacement, double-signal feedback is achieved, and the measurement accuracy is improved. The method has great application value in the field of mechanical sensing.

Description

Technical field: [0001] The invention belongs to the technical field of biomedical materials, and in particular relates to a polyurethane-polypyrrole composite conductive structural color film and a preparation method thereof. Background technique: [0002] Health has been a long-term and closely watched topic, which is closely related to human development and progress. In addition to routine physiological indicators such as blood sugar, blood pressure, and biomarkers, various mechanical indicators related to muscles, bones, and ligaments also have a large number of monitoring and measurement needs. The evaluation of these mechanical indicators involves rehabilitation medicine, preventive medicine, and hygiene. , clinical medicine and sports medicine and other fields. At present, there are already a large number of related instruments on the market, which are used to capture mechanical indicators and analyze their physiological stability, changing trends and abnormal fluctu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L39/04C08K3/36C08J5/18C08J5/24G01N27/04G01N21/78
CPCC08J5/18C08J5/24G01N27/041G01N21/78C08J2375/04C08J2439/04C08K3/36
Inventor 赵远锦池俊杰邵长敏王月桐商珞然
Owner WENZHOU INST UNIV OF CHINESE ACAD OF SCI