Preparation method and application of unilateral sensitive flexible film with micro-nano composite structure

A micro-nano composite structure and flexible film technology, which is applied in the field of flexible gas and humidity sensing, can solve the problems that cannot affect the response characteristics of the sensor, and achieve good response bending stability, avoid enrichment, and avoid direct contact.

Inactive Publication Date: 2021-06-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, it must have good flexibility to meet the needs of bending deformation during wearing; second, the bending deformation cannot affect the response characteristics of the sensor; in addition, the wearable flexible gas or humidity sensor must also have light and breathable characteristics to meet the requirements of wearing Comfort requirements during the process; in addition, wearable flexible gas or humidity sensors must be safe and non-toxic to avoid affecting the health of the wearer; finally, while meeting the above use requirements, try to ensure that wearable flexible gas or humidity sensors meet the processing requirements. Simple, low cost, convenient for mass production and other needs, currently there is no mature technology or product available

Method used

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  • Preparation method and application of unilateral sensitive flexible film with micro-nano composite structure
  • Preparation method and application of unilateral sensitive flexible film with micro-nano composite structure
  • Preparation method and application of unilateral sensitive flexible film with micro-nano composite structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] ①The first step is to prepare 0.001 mol / L sodium dodecylbenzenesulfonate and 0.3 mol / L aniline sulfate aqueous solution, and 0.5 mol / L potassium persulfate and 1 mol / L camphorsulfonic acid aqueous solution, and the above two aqueous solutions Stir to dissolve and mix well.

[0042] ② Float the hydrophobic polypropylene (PP) microporous membrane on the mixed solution prepared in step 1), polymerize at -5°C for 4 h, wash, and dry at 70°C to obtain a single membrane with a micro-nano composite structure. Side-sensitive polyaniline (PANI) / PP flexible film. After cutting the flexible film as the sensing element of the sensor, and connecting it to the corresponding external circuit, a wearable flexible film gas or humidity sensor can be produced. This kind of application is relatively straightforward for those skilled in the art, and existing technical solutions can be adopted.

[0043] figure 1 It is the working principle diagram corresponding to the one-sided sensitive f...

Embodiment 2

[0047] ① In the first step, prepare 0.03 mol / L sodium dodecylbenzene sulfonate and 1 mol / L aniline sulfate aqueous solution, and 0.05 mol / L ammonium persulfate and 0.5 mol / L polystyrene sulfonic acid aqueous solution. The aqueous solution was stirred to dissolve and then mixed evenly.

[0048] ② Float the hydrophobic PP microporous membrane on the mixed solution prepared in step 1), polymerize at 3 °C for 24 h, wash, and dry at 150 °C to obtain a single-sided sensitive PANI / PP flexible film; can be fabricated into a wearable flexible film NH 3 gas sensor.

[0049] Figure 10 The wearable flexible film NH prepared for the one-sided sensitive PANI / PP flexible film with micro-nano composite structure obtained in Example 2 of the present invention 3 Gas sensor for different concentrations of NH 3 The dynamic response result graph. Regulation of NH in the test chamber by a dynamic gas distribution process 3 Concentrations of 0, 0.5, 1, 2, 3, 5, 8 and 10 ppm, PANI / PP wearable...

Embodiment 3

[0051] ① In the first step, prepare 0.05 mol / L sodium cetyl sulfate and 0.7 mol / L aniline hydrochloride aqueous solution, and 1 mol / L ammonium persulfate and 1 mol / L polystyrene sulfonic acid aqueous solution, and stir the above two aqueous solutions Mix well after dissolving.

[0052] ② Float the hydrophobic polytetrafluoroethylene (PTFE) microporous membrane on the mixed solution prepared in step 1), polymerize at 0°C for 8 hours, wash, and dry at 110°C to obtain a micro-nano composite structure One-sided sensitive PANI / PTFE flexible membrane; can be prepared into a wearable flexible membraneNO 2 gas sensor.

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Abstract

The invention discloses a preparation method and application of a unilateral sensitive flexible film with a micro-nano composite structure. A hydrophobic microporous membrane is used as a substrate and a template, a surfactant is used as a structure regulator, and a protonic acid doped conductive polymer sensitive material with a nanoparticle structure is deposited on one side of the hydrophobic microporous membrane through an in-situ polymerization method to prepare the conductive polymer / microporous membrane composite flexible membrane. A gas or humidity sensor prepared by using the single-side sensitive flexible film with the micro-nano composite structure as a sensing element has the advantages of flexibility, bendability, breathability, health, sensitive response, simple process, low cost, good product consistency and repeatability and the like; the product can be applied to the fields of flexible electronic devices, wearable intelligent equipment, portable medical instruments and the like.

Description

technical field [0001] The invention relates to a single-side sensitive flexible film sensor with a micro-nano composite structure and a preparation method, as well as the application of the flexible film sensor in the field of gas and humidity sensing, belonging to the technical field of flexible gas and humidity sensing. Background technique [0002] Wearable electronic devices are currently one of the most active research areas. A variety of wearable products such as smart clothing, watches, patches, bracelets, glasses, and electronic skins present a huge application market. Flexible sensors are the core of wearable electronics technology, and are usually closely attached to the surface of the skin or embedded in clothing or other wearable electronic products to achieve full contact with the human body. Such sensors can monitor various health-related physical, chemical or biological signals, such as body temperature, breathing pattern (including breathing rate and depth)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00G01N27/02G01N27/04C08G61/12C08G73/02C08G73/06
CPCC08G61/126C08G73/0266C08G73/0611G01N27/00G01N27/02G01N27/048
Inventor 李扬赵慧杰王钊陈慧真杨慕杰
Owner ZHEJIANG UNIV
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