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Preparation method and application of conductive composite based on cellulose sponge

A technology of conductive composite material and cellulose sponge, which is applied to the measurement of the property force of piezoelectric resistance materials, etc., can solve the problems of many influencing factors and the conductivity of the sponge is easily affected by the external environment, so as to achieve simple process and high conductivity. Stable, responsive effect

Active Publication Date: 2016-12-07
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flexible pressure sensor based on graphene oxide sponge prepared by this method is assembled from three layers of materials, and there are many influencing factors, such as the long strip graphene electrode array deposited by spraying on the outer surface of the flexible substrate. influence, making the conductivity of the sponge vulnerable to the external environment

Method used

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Examples

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preparation example Construction

[0029] The invention discloses a preparation method based on cellulose sponge conductive composite material, which comprises the following preparation steps:

[0030] 1) Disperse graphene oxide or / and carbon nanotubes in water or an organic solvent to form a dispersion of graphene oxide or / and carbon nanotubes, soak the cut cellulose sponge in the dispersion to make the fibers Plain sponge reacts with graphene oxide or / and carbon nanotube dispersion liquid, prepares graphene oxide or / and carbon nanotube cellulose sponge; Take out this graphene oxide or / and carbon nanotube cellulose sponge, and its natural dry;

[0031] Specifically, the mass concentration of the dispersion of graphene oxide or / and carbon nanotubes is 2 to 130 mg / L; and when the dispersion is a mixed solution of graphene oxide and carbon nanotubes, graphene oxide and carbon nanotubes The mass percentage is 1-99:99-1.

[0032] Further, the cellulose sponge is used as a base material, the cellulose content in t...

Embodiment 1

[0041] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.

[0042] A preparation method based on cellulose sponge conductive composite material, comprising the following preparation steps:

[0043] 1) Take graphene oxide and disperse it in water. After ultrasonic dispersion, a graphene oxide dispersion with a mass concentration of 10 mg / L is formed. Then, take a cellulose sponge with a volume of 1 cm × 1 cm × 1 cm as a base material and soak it in In this graphene oxide dispersion liquid, keep stirring speed under the condition of 50r / min, make each face of cellulose sponge matrix material fully contact with graphene oxide dispersion liquid, reaction time is 30min, make graphene oxide dispersion liquid Uniformly adsorbed on each part of the cellulose sponge base material to prepare a graphene ox...

Embodiment 2

[0046] A preparation method based on cellulose sponge conductive composite material, comprising the following preparation steps:

[0047] 1) Get graphene oxide and carbon nanotubes of equal mass and disperse them in ethanol simultaneously, after ultrasonic dispersion, form the graphene oxide / carbon nanotube dispersion liquid that mass concentration is 30mg / L, in this graphene oxide / carbon nanotubes Tube dispersion liquid, the mass percentage of graphene oxide and carbon nanotubes is 50:50, and then take a cellulose sponge with a volume of 2cm×2cm×2cm as the matrix material, soak in the graphene oxide / carbon nanotube dispersion In the solution, keep the stirring speed at 85r / min, so that each surface of the cellulose sponge matrix material can fully contact and react with the graphene oxide dispersion, and the reaction time is 60min, so that the graphene oxide dispersion is evenly adsorbed on the fiber Each part of the plain sponge matrix material is prepared to obtain a graphe...

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Abstract

The invention discloses a preparation method and application of a conductive composite based on a cellulose sponge, and belongs to the field of functional polymer materials. According to the preparation method, the cellulose sponge is adopted as a base material, the cellulose sponge can fully absorb graphene oxide or / and carbon nano tubes through a physical soaking method, after the sponge is dried, graphene oxide is reduced, and the cellulose sponge conductive composite in which the graphene or / and the carbon nano tubes are evenly dispersed is obtained. Pressure sensing performance testing is carried out on the prepared conductive composite, and it is found that as pressure changes, resistance changes along with the pressure, and under the condition that the pressure is low, the change degree is more obvious, and it is indicated that a flexible pressure sensor prepared under the condition that the pressure is low is sensitive. Compared with an existing metallic oxide sensor of silicon of a semiconductor on the market, the flexible sensor has good application on the aspects of medical detection and the like.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a preparation method and application of a cellulose sponge-based conductive composite material. Background technique [0002] Sponge has the advantages of good bulkiness, soft texture and good water absorption, so it has a wide range of applications in cleaning, washing, cosmetics, medical treatment and other fields. The sponge products sold on the market today are mainly derived from polyurethane and polystyrene in petroleum products. Long-term use will not only cause harm to the human body, but also cause certain pollution to the environment during production and waste disposal. Cellulose is the most common natural resource in nature. Straw, trees, cotton and hemp provide abundant sources for it, and it is continuously regenerated through photosynthesis of plants, with an annual output of up to 100 billion tons. Under natural conditions, the final decomp...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08K3/04C08K7/24C08J9/40G01L1/18
CPCC08J9/40C08J2301/02C08K3/04C08K7/24C08K2201/011G01L1/18C08L1/02
Inventor 李沐芳王栋李玉琴钟卫兵李飞刘轲刘琼珍蒋海青
Owner WUHAN TEXTILE UNIV
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