Preparation method of carbon nanotube polyaniline coating knitted fabric strain sensor

A technology of strain sensor and carbon nanotubes, which is applied in the direction of plant fibers, textiles, papermaking, fiber types, etc., can solve the problems of easy aggregation of carbon nanotubes, poor dispersion, insoluble polyaniline, etc., to improve electrical conductivity and promote adhesion Attachment, the effect of high specific surface area

Active Publication Date: 2019-10-22
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: Aiming at many defects existing in the preparation process of the current conductive coated fabric, the present invention provides a preparation method of a carbon nanotube polyaniline coated knitted fabric strain sensor, first coating the carbon nanotube on the Cotton fabric surface, and then in-situ polymerize aniline on the surface of carbon nanotube-coated fabric, polyaniline covers carbon nanotubes, and at the same time, a part of polyaniline is directly grafted and polymerized on the surface of the fabric to obtain carbon nanotube-polyaniline coated The multi-layer fabric not only effectively solves the problem of the agglomeration of carbon nanotubes on knitted fabrics, but also has a large number of hydrogen bonds and van der Waals forces between polyaniline and fabrics, which can effectively improve the force between carbon nanotubes-polyaniline and fabrics. Conducive to the improvement of its durability
Polyaniline is insoluble in organic solvents. Carbon nanotubes have good electrical properties and chemical stability, but poor dispersion. The polymerization products of aniline and carbon nanotubes combine the advantages of the two, synergize with each other, and learn from each other to improve the difficulty of polyaniline. Dissolution and carbon nanotubes are easy to agglomerate, and a strain sensor with excellent performance is prepared

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
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  • Preparation method of carbon nanotube polyaniline coating knitted fabric strain sensor
  • Preparation method of carbon nanotube polyaniline coating knitted fabric strain sensor
  • Preparation method of carbon nanotube polyaniline coating knitted fabric strain sensor

Examples

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Embodiment 1

[0032] Embodiment 1: selected is the polyester-cotton rib knitted fabric, prepares carbon nanotube / polyaniline coated knitted fabric according to the following steps:

[0033] Step 1: Pretreat the woven knitted fabric, measure 500ml of deionized water in a beaker with a measuring cylinder, weigh 10g of NaOH with an electronic balance, put it into the beaker and stir until dissolved, put the knitted fabric into the beaker, After soaking at a constant temperature of 85°C for 1 hour, take it out, wash it until neutral, dry it and weigh it for later use;

[0034] Step 2: Due to the poor solubility of carbon nanotubes, they are difficult to dissolve in organic solvents and water, and are extremely prone to agglomeration. In order to make up for this defect, it is necessary to modify the surface of carbon nanotubes. Preparation of the carbon nanotube dispersion: put the carbon nanotubes into the pickling solution for immersion pickling, pickling for 1 hour, suction filtration to rem...

Embodiment 2

[0040] Embodiment 2: the polyester-cotton knitted fabric sample selected in this embodiment and embodiment 1 is the same, the difference is that the parameters of the method steps are different, and the specific method steps of this embodiment are as follows:

[0041] Step 1: Pretreat the woven knitted fabric, measure 500ml of deionized water in a beaker with a measuring cylinder, weigh 10g of NaOH with an electronic balance, put it into the beaker and stir until dissolved, put the knitted fabric into the beaker, After soaking at a constant temperature of 85°C for 1 hour, take it out and wash it until neutral, dry it and weigh it for later use.

[0042] Step 2: Due to the poor solubility of carbon nanotubes, they are difficult to dissolve in organic solvents and water, and are extremely prone to agglomeration. In order to make up for this defect, it is necessary to modify the surface of carbon nanotubes. Preparation of carbon nanotube dispersion: put the carbon nanotubes into ...

Embodiment 3

[0047] Embodiment 3: The polyester-cotton knitted fabric sample selected in this embodiment is the same as that in Embodiment 1, the difference is that the parameters of the method steps are different, and the specific method steps of this embodiment are as follows:

[0048] Step 1: Pretreat the woven knitted fabric, measure 500ml of deionized water in a beaker with a measuring cylinder, weigh 10g of NaOH with an electronic balance, put it into the beaker and stir until dissolved, put the knitted fabric into the beaker, After soaking at a constant temperature of 85°C for 1 hour, take it out, wash it until neutral, dry it and weigh it for later use;

[0049] Step 2: Prepare the carbon nanotube dispersion: put the carbon nanotubes into the pickling solution for immersion and pickling, pickle for 2.5 hours, remove the pickling solution by suction filtration, and repeatedly wash and filter the carbon nanotubes with deionized water until the pH of the carbon nanotubes is 7 .5; the ...

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
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Abstract

The invention discloses a preparation method of a carbon nanotube polyaniline coating knitted fabric strain sensor and belongs to the field of knitted fabric strain sensors. The preparation method includes: subjecting woven rib fabric to carbon nanotube coating, and using an in-situ polymerization method to generate polyaniline on the surface of the fabric so as to finally generate the compound ofcarbon nanotubes and polyaniline, wherein compound is used as the raw material of the strain sensor. The rib fabric has good elasticity and ductility due to self-structural features and can satisfy the structural requirements of the sensor. The polyaniline is poor in electric conductivity in neutral and alkaline environments, the defect is overcome by adding the carbon nanotubes, and the polyaniline attached to the surface of the carbon nanotubes improve the problems that the carbon nanotubes are poor in dispersity and prone to agglomeration; by adding sodium dodecyl benzene sulfonate and / ordodecylbenzene sulfonic acid to serve as the doping agent, the electric conductivity of the knitted fabric strain sensor is further increased.

Description

technical field [0001] The invention relates to the field of knitted fabric strain sensing, in particular to a preparation method of a carbon nanotube polyaniline coated knitted fabric strain sensor. Background technique [0002] Sensors are used in a wide range of applications: medical and health care, forest protection, industrial chemicals, etc. In order to improve the applicability of the sensor, most of them no longer use hard electronic components. [0003] As described in Chinese patent CN107692376A, a textile-based flexible sensor network is distributed on relevant parts of the glove to replace hard electronic sensing elements. The glove body is bonded with a fabric stress and strain sensor, and the glove body is also integrated with a fabric circuit. Each fabric stress and strain sensor is connected with the fabric circuit to form a stress and strain sensing network, and the stress and strain sensing network is connected with the control unit. The textile circuit ...

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
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74D06M15/61D06M13/256D06M101/32D06M101/06
CPCD06M11/74D06M13/256D06M15/61D06M2101/06D06M2101/32
Inventor 邹梨花徐珍珍杨伟平孙妍妍杨莉
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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