High-conductivity paper pulp/carbon nanotube composite paper and preparation method thereof

A carbon nanotube composite and carbon nanotube technology is applied in the field of conductive paper to achieve the effects of excellent conductivity, high retention rate and no residual dispersant

Active Publication Date: 2019-12-03
KUNMING NATAI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the addition of retention aids also has the same problems as surfactants

Method used

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  • High-conductivity paper pulp/carbon nanotube composite paper and preparation method thereof
  • High-conductivity paper pulp/carbon nanotube composite paper and preparation method thereof
  • High-conductivity paper pulp/carbon nanotube composite paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 Shown is a schematic diagram of the process principle for preparing pulp / carbon nanotube composite paper. Cellulose / carbon nanotube composite paper was prepared by using cellulose pulp 2 and carbon nanotube 1. Put the cellulose pulp and carbon nanotubes in proportion to 2500 ml of water, and use a standard fiber disintegrator to disintegrate for 10 minutes. Then the mixed pulp suspension was diluted to a concentration of 0.2wt%, ultrasonically treated with an ultrasonic processor (20kHz, 2000W), and the ultrasonically treated mixed pulp suspension was poured into a Kaiser former to prepare wet paper web 3 , and then dried in a paper dryer.

[0034] In the first set of experiments, the mass of each sample will be kept at 12g (i.e. 80 g / m2), the content of carbon nanotubes (CNT) will be fixed at 20wt%, and different ultrasonic treatment times (i.e. different ultrasonic energy densities) will be prepared sequentially. composite paper, the specific ultr...

Embodiment 2

[0038] Aramid fiber / carbon nanotube composite paper was prepared by using aramid pulp and carbon nanotubes. The used aramid pulp includes aramid chopped fiber and aramid pulp, which are mixed in a mass ratio of 3:7. The specific operation process is the same as that of preparing and testing the cellulose / carbon nanotube composite paper in Example 1.

[0039] figure 2In Examples 1 and 2, resistivity curves of composite paper prepared through different ultrasonic energy density treatments. It can be seen from the figure that the conductivity of the nanocomposite paper without ultrasonic treatment is poor. The resistivity of the cellulose / CNT composite paper is 2.09Ω•cm, and the resistivity of the aramid fiber / CNT composite paper is 3.95Ω•cm. This is because the deflaking action can only disperse the pulp fibers, but cannot disperse the carbon nanotubes, so the carbon nanotubes cannot form a uniformly distributed conductive network in the pulp. After ultrasonic treatment, the...

Embodiment 3

[0048] In this example, it will be prepared by large-scale papermaking on a paper machine based on the process of Examples 1 and 2. Add cellulose pulp and carbon nanotubes into a hydropulper at a ratio of 4:1, add water, and turn on the hydropulper for disintegration. Then dilute the mixed pulp suspension to a concentration of 0.2%, use a pump to transport the ultrasonic reactor (20kHz, 12kW) to ultrasonically treat the mixed pulp, and transport the ultrasonically treated mixed pulp suspension to the inclined wire paper machine for making wet paper. The paper web is then dried in the drying section and wound on a winder (e.g. Figure 8 ).

[0049] The ultrasonic reactor is specifically a container with a power ultrasonic generating device inside, and the container includes an inlet and an outlet. In this embodiment, the mixed pulp suspension is continuously transported to the ultrasonic reactor through the inlet at a flow rate of 2 L per minute through the pump, and the ultr...

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Abstract

The invention relates to high-conductivity paper pulp / carbon nanotube composite paper and a preparation method thereof. The preparation method comprises the following steps: (1) adding paper pulp andcarbon nanotubes into water, and defibering to prepare paper pulp carbon nanotube suspension; (2) carrying out ultrasonic treatment on the paper pulp carbon nanotube suspension to prepare paper pulp carbon nanotube mixed slurry; and (3) filtering the paper pulp carbon nanotube mixed slurry, forming to obtain a wet paper web, and drying the wet paper web to obtain the final product. According to the preparation method provided by the invention, the adhesion effect of the paper pulp and the carbon nanotubes is fully utilized, a dispersing agent and a retention aid are not needed, a dispersing effect and a retention aid effect are simultaneously achieved through a simple ultrasonic treatment process, the paper pulp / carbon nanotube composite paper can be formed on a common paper machine, the retention rate is high, the process is simple, the paper pulp / carbon nanotube composite paper is environment-friendly, the conductivity of the prepared paper pulp / carbon nanotube composite paper is excellent, and dispersing agent residues do not exist.

Description

technical field [0001] The invention relates to conductive paper, in particular to high conductive pulp / carbon nanotube composite paper and a preparation method thereof. Background technique [0002] Flexible and highly conductive sheets are widely used in flexible wearable electronics, energy storage devices, and human-machine interfaces. Paper is a flexible film material with a three-dimensional porous structure composed of many types of fibers: natural cellulose, polyester, glass fiber, aramid, etc. Conductive paper can be obtained by adding conductive materials such as conductive polymers, carbon fibers, graphite, graphene, and carbon nanotubes to paper-based materials. Among them, carbon nanotubes (CNTs) have excellent electrical and thermal conductivity, are in the shape of nanofibers, have a high aspect ratio, and match the fibers used in papermaking, and their nanometer size has little effect on the paper structure. Since the composite paper containing carbon nanot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H17/00D21H21/52D21H21/14D21H13/26D21H15/02D21C9/00
CPCD21H27/00D21H17/00D21H21/52D21H21/14D21H13/26D21H15/02D21C9/007Y02E60/13
Inventor 肖辉刘铸顾愚
Owner KUNMING NATAI TECH CO LTD
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