Carbon nanotube/polypyrrole composite fiber and its preparation method and its application in transistor sensors

A carbon nanotube and composite fiber technology, applied in the field of biosensors, can solve the problems of narrow detection range and high production cost of flexible lactic acid sensors

Active Publication Date: 2021-04-23
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the actual detection range of the flexible lactic acid sensor is relatively narrow, and the production cost is relatively high

Method used

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  • Carbon nanotube/polypyrrole composite fiber and its preparation method and its application in transistor sensors
  • Carbon nanotube/polypyrrole composite fiber and its preparation method and its application in transistor sensors
  • Carbon nanotube/polypyrrole composite fiber and its preparation method and its application in transistor sensors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] This embodiment provides a method for preparing a carbon nanotube / polypyrrole composite fiber-based transistor sensor, which includes the following steps:

[0079] 1) Configure carbon nanotube dispersion: take the mass of 1g carbon nanotubes, 1g sodium dodecyl sulfate and 100g deionized water, respectively, and ultrasonically treat for 1 hour after mixing to obtain carbon nanotube dispersion;

[0080] 2) Preparation of flexible fibers coated with carbon nanotube layers: take the PA6 nylon fibers whose surfaces have been ultrasonically cleaned with ethanol, and place them in the carbon nanotube dispersion in step 1) for repeated immersion for 4 h, take out, wash with water, and dry. A flexible fiber coated with a carbon nanotube layer is obtained;

[0081] 3) Configure mixed solution A: take 0.15 g of anthraquinone-2-sulfonic acid sodium salt, and dissolve 1.8 g of pyrrole monomer into deionized water to obtain 150 mL of mixed solution A;

[0082] 4) configure mixed sol...

Embodiment 2

[0091] This embodiment provides a method for preparing a carbon nanotube / polypyrrole composite fiber-based transistor sensor, which includes the following steps:

[0092] 1) Configure carbon nanotube dispersion: take the mass of 1g carbon nanotubes, 1g sodium dodecyl sulfate and 100g deionized water, respectively, and ultrasonically treat for 1 hour after mixing to obtain carbon nanotube dispersion;

[0093] 2) Preparation of flexible fibers coated with carbon nanotube layers: take the silk fibers whose surfaces have been ultrasonically cleaned with ethanol, place them in the carbon nanotube dispersion in step 1) and soak them for 4 hours, take out, wash with water, and dry to obtain Flexible fibers coated with carbon nanotube layers;

[0094] 3) Configure mixed solution A: take 0.15 g of anthraquinone-2-sulfonic acid sodium salt and 1.8 g of pyrrole monomer in deionized water to obtain 150 mL of mixed solution A;

[0095] 4) configure mixed solution B: get 30g of 9-hydrated ...

Embodiment 3

[0104] This embodiment provides a method for preparing a carbon nanotube / polypyrrole composite fiber-based transistor sensor, which includes the following steps:

[0105] 1) Configure carbon nanotube dispersion: take the mass of 1g carbon nanotubes, 1g sodium dodecyl sulfate and 100g deionized water, respectively, and ultrasonically treat for 1 hour after mixing to obtain carbon nanotube dispersion;

[0106] 2) Preparation of flexible fibers coated with carbon nanotube layers: take polyester fibers whose surfaces have been ultrasonically cleaned with ethanol, soak them in the carbon nanotube dispersion in step 1) for 4 hours, take out, wash with water, and dry to obtain Flexible fibers coated with carbon nanotube layers;

[0107] 3) Configure mixed solution A: take 0.15 g of anthraquinone-2-sulfonic acid sodium salt and 1.8 g of pyrrole monomer in deionized water to obtain 150 mL of mixed solution A;

[0108] 4) configure mixed solution B: get 30g of 9-hydrated ferric nitrate...

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Abstract

The invention discloses a carbon nanotube / polypyrrole composite fiber, a preparation method and its application in transistor sensors, belonging to the technical field of biosensors. The invention coats the dispersed carbon nanotubes on the flexible fibers, and then chemically in-situ polymerizes the pyrrole monomer onto the flexible fibers containing the coated carbon nanotubes. The good thermodynamic properties and electrical conductivity of the carbon nanotubes make it The formation of a "bridge" between the flexible fiber surface and polypyrrole is more conducive to the growth of linear polypyrrole. The linear polypyrrole is more conducive to improving the performance of transistor sensors. The preparation method of the present invention has simple process, relatively mild reaction conditions, low production cost, and no pollution, and is suitable for large-scale preparation of nanofiber transistors, and the prepared transistor sensor only has detection ability for lactic acid, strong anti-interference performance, and high accuracy. High, good sensitivity, the detection limit is as low as 1nM / L, and the detection range is wide, about lactic acid with a concentration of 1nM / L~1mM / L.

Description

technical field [0001] The invention relates to an organic electrochemical transistor, belongs to the technical field of biosensors, and in particular relates to a carbon nanotube / polypyrrole composite fiber, a preparation method and its application in a transistor sensor. Background technique [0002] Carbon nanotubes, as one-dimensional nanomaterials, are light in weight, have perfectly connected hexagonal structures, and possess many unusual mechanical, electrical and chemical properties. In recent years, with the in-depth research of carbon nanotubes and nanomaterials, their broad application prospects have also been continuously shown. Carbon atoms in carbon nanotubes start with sp 2 Hybridization is dominant, and at the same time, the hexagonal grid structure has a certain degree of curvature, forming a spatial topology, in which a certain sp can be formed. 3 Hybrid bond, i.e. the chemical bond formed has both sp 2 and sp 3 Mixed hybrid state, and these p orbitals ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74D06M15/37C08G73/06G01N27/414D06M101/06D06M101/12D06M101/28D06M101/32D06M101/34
CPCC08G73/0611D06M11/74D06M15/37D06M2101/06D06M2101/12D06M2101/28D06M2101/32D06M2101/34G01N27/4146
Inventor 王跃丹王栋张杨卿星丁新城陈媛丽王雯雯
Owner WUHAN TEXTILE UNIV
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