Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of grapheme/polydiacetylene composite film and method for quantitatively detecting gas organic by applying composite film

A technology of composite thin film and dibutyne, which is applied in the direction of material analysis through observation of the influence of chemical indicators, and analysis through chemical reaction of materials, can solve the problems of poor sensitivity of composite materials, achieve sensitivity improvement, and prepare The method is simple and the performance is good

Inactive Publication Date: 2015-01-21
HARBIN INST OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a graphene / polydibutyne composite film in order to solve the technical problem of poor sensitivity of the composite material prepared in the prior art

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
  • Preparation method of grapheme/polydiacetylene composite film and method for quantitatively detecting gas organic by applying composite film
  • Preparation method of grapheme/polydiacetylene composite film and method for quantitatively detecting gas organic by applying composite film
  • Preparation method of grapheme/polydiacetylene composite film and method for quantitatively detecting gas organic by applying composite film

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0027] Specific embodiment one: the preparation method of graphene / polydibutylene composite film in the present embodiment is as follows:

[0028] 1. Put the expandable graphite with a particle size of 80-200 mesh into the porcelain boat, and place the porcelain boat in the reaction zone of the tube furnace, under the conditions of hydrogen and argon gas flow ratio of 1:9, normal pressure, and 1000°C Reaction 2min, obtains graphite;

[0029] 2. Add graphite to dimethylformamide and ultrasonically disperse for 60 minutes to obtain a solution with a concentration of 0.1 g / L, then centrifuge the solution with a concentration of 0.1 g / L at 1000 rpm for 90 minutes, and collect the supernatant;

[0030] 3. Sonicate the polyethylene terephthalate film with acetone and ethanol for 20 minutes respectively, then dry it for 30 minutes, then drop the supernatant onto the polyethylene terephthalate film treated by the above method, vacuum Dry for 20min to obtain a graphene film;

[0031]...

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, expandable graphite with a particle size of 80 meshes is put into the porcelain boat. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0035] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, expandable graphite with a particle size of 100 mesh is put into the porcelain boat. Others are the same as in the first embodiment.

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a grapheme / polydiacetylene composite film and a method for quantitatively detecting a gas organic by applying the composite film and relates to a preparation method of a composite film and a method for detecting a gas organic. The preparation method of the grapheme / polydiacetylene composite film comprises the following steps of: 1, preparing a grapheme film; 2, Preparing a chloroformic solution of 10,12-25 diacetylenic acid; and 3, dipping the grapheme film in the chloroformic solution of 10,12-25 diacetylenic acid for reacting in dark conditions and irradiating by utilizing an ultraviolet lamp. The number of layers of grapheme is 2 to 5, and the transmittance reaches 82% in a blue light area and reaches 76.9% in a red light area. The high transmittance is beneficial to a sensor to show a color signal after the sensor is reacted with a toxic volatile gas, the grapheme prepared by the method has good dispersity and high sensitivity, and a substrate material with high quality is provided for preparing a grapheme / PDA (polydiacetylene) film sensor.

Description

technical field [0001] The invention relates to a preparation method of a composite film. Background technique [0002] PDA is a π-conjugated organic compound, which can be obtained by irradiating its monomer with ultraviolet light. When subjected to external stimuli, such as temperature, solvent, ligand reaction, mechanical pressure, etc., PDA molecules can undergo a clear color change from blue to red. These color changes can be easily observed by UV-Vis spectroscopy, fluorescence spectroscopy or naked eye. Therefore, PDA is considered to be an ideal material for the preparation of simple and convenient color sensors. Toxic volatile organic gases can pose a great threat to biological species and human health. Currently, detection technologies for this gas mainly include liquid phase or gas chromatography, metal oxide sensors, metal-organic sensors, surface acoustic waves, and the like. These methods have great disadvantages, including high cost, cumbersome analysis pro...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 胡平安王晓娜张甲冯伟王立峰杨彬曹文武
Owner HARBIN INST OF TECH