Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polymethyl methacrylate/polyaniline nano fibre composite resistor type film gas sensor and preparation method thereof

A polymethyl methacrylate, nanofiber technology, applied in the direction of material analysis, measurement device, instrument, etc. by electromagnetic means, can solve problems such as restricting the application and further development of electrospinning, increasing contact resistance, and little research. , to shorten the response and recovery time, reduce contact resistance, and achieve good consistency

Inactive Publication Date: 2008-07-23
ZHEJIANG UNIV
View PDF0 Cites 33 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the successful transfer of nanomaterials prepared by electrospinning to ceramic substrate electrodes to make electrodes.
This is due to the sharp increase in the contact resistance of the gas sensor produced by the traditional method due to the poor contact between the substrate and the fiber film.
This has hindered and restricted the application and further development of electrospinning in practice.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polymethyl methacrylate/polyaniline nano fibre composite resistor type film gas sensor and preparation method thereof
  • Polymethyl methacrylate/polyaniline nano fibre composite resistor type film gas sensor and preparation method thereof
  • Polymethyl methacrylate/polyaniline nano fibre composite resistor type film gas sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Soak and clean the surface photolithography and evaporate the ceramic substrate with interdigitated gold electrodes with absolute ethanol and acetone. There are 5 pairs of interdigitated gold electrodes. The interdigitated gold electrodes have a width of 200 μm and a gap of 200 μm. drying spare;

[0030] 2) Preparation of polymethyl methacrylate nanofibers by electrospinning: the N, N-dimethylacetamide solution with a concentration of 0.18 g / ml polymethyl methacrylate was packed in a plastic syringe with a stainless steel needle inside, and fixed on top of the syringe. Connect the anode of the high-voltage power supply to the needle with a copper wire, and the cathode of the high-voltage power supply is connected to the copper plate as the receiving plate, and the copper plate is provided with a cover glass; the distance between the needle and the copper plate is 15cm; between the syringe needle and the copper plate, apply High voltage, the power supply voltage is 2...

Embodiment 2

[0035] 1) Electrode cleaning is the same as in Example 1;

[0036] 2) Prepare polymethyl methacrylate nanofibers by electrospinning, wherein the N,N-dimethylacetamide solution with a concentration of 0.32g / ml polymethyl methacrylate is packed in a plastic with a stainless steel needle Inside the syringe and fixed on top of the syringe. Connect the anode and the needle of the high-voltage power supply with a copper wire, while the cathode is connected to the copper plate as the receiving plate; the distance between the needle and the collecting plate is 15cm; apply high-voltage electricity between the needle of the syringe and the receiving plate, and its power supply voltage is 20KV, use a medical syringe pump to squeeze the solution out of the syringe, and the solution flow rate is 0.2mL / h. The extruded solution forms continuous nanometer-sized fibers under the action of a high-voltage electric field, deposits on the cover glass, forms a film after a certain period of time, ...

Embodiment 3

[0041] 1) Electrode cleaning is the same as in Example 1;

[0042] 2) The electrospinning process is the same as in Example 1;

[0043]3) At a temperature of 20°C, the solution containing 0.1M APS, 1M aniline and 2M sulfosalicylic acid (SSA) was first stirred for 10 minutes, and then the coverslip with PMMA nanofibers was placed in the above solution middle. After 40 min of polymerization, the coverslip was removed from the beaker and washed with 0.001 M sulfosalicylic acid (SSA) solution to remove residual reagents and adsorbed PANI particles to obtain a polymethylmethacrylate / polyaniline nanofiber film ;

[0044] 4) The ceramic substrate electrode with gold fingers is placed horizontally in the above SSA solution, lifted vertically from below the solution covered with nanofiber composite film, so that the composite film is transferred to the electrode, and dried with nitrogen at room temperature.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Interdigital widthaaaaaaaaaa
Interdigital gapaaaaaaaaaa
Interdigital widthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polymethyl methacryate / polyaniline nanometer fiber composite resistance membrane gas sensor and a relative preparation method. The invention uses electrostatic spinning method to prepare polymethyl methacryate (PMMA) nanometer fiber, uses solution original aggregation method to compose polyaniline (PAN) to obtain the PMMA / PANI nanometer fiber composite membrane, and covers the composite film on the an Au interdigital ceramic substrate electrode. The invention has simple preparation, low cost and batch production application, while the prepared gas sensor has wide measurement range, high response sensitivity, better linearity, better resilience and room-temperature detection on triethylamine gas. The invention has wide application for online accurate measurement of triethylamine gas density under room temperature in industrial and agricultural production and atmosphere.

Description

technical field [0001] The invention relates to a polymethyl methacrylate / polyaniline nanocomposite resistive film gas sensor and a manufacturing method thereof. Background technique [0002] The progress of society and the development of technology provide a broad space for the research and application of sensors. Gas sensor is a kind of chemical sensor, which has a wide range of applications in environmental monitoring, industrial production, storage, etc., and plays an increasingly important role in people's daily life and the development of science and technology. Polymer gas sensor is a new type of gas sensor widely used at present. It has excellent response characteristics, wide measurement range, room temperature detection, easy integration and miniaturized mass production, and low price. In addition, because nanomaterials have special effects that macroscopic materials do not have, such as macroscopic quantum effects and surface effects, the preparation of gas sens...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 李扬季善坐杨慕杰
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com