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A kind of carbon nanofiber paper and preparation method thereof

A carbon nanofiber paper, carbon nanofiber technology, applied in the directions of synthetic cellulose/non-cellulose material pulp/paper, non-fibrous pulp addition, fiber raw material processing, etc., can solve the problem of high price, excessive filter requirements, discomfort For large-scale low-cost production and other issues, to achieve the effect of enhancing mechanical strength, reducing pore size requirements, and ensuring retention

Active Publication Date: 2015-12-09
KUNMING NATAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, micron-scale carbon fiber paper cannot replace carbon nanofiber paper. Carbon nanofibers are incomparable to ordinary micron-scale carbon fibers in terms of specific surface area, electrical conductivity and mechanical properties.
However, there is still a blank in China in terms of large-scale and low-cost production of carbon nanofiber paper, and many technologies are not suitable for large-scale and low-cost production
For example, Chinese patents CN102351165, CN102561109 and CN1475437 all disclose a method for preparing carbon nanotube paper obtained by dispersing suction filtration. This preparation method selects expensive carbon nanotubes, and due to the nanoscale size of carbon nanotubes , to ensure the retention of carbon nanotubes on the filter screen, the requirements for the filter screen are too high, and it is not suitable for large-scale low-cost production
Chinese patent CN101284662 discloses a method for preparing carbon nanotube film through flocculation treatment and separation and shaping process. Due to the addition of flocculation treatment process, this method does not require high filter screens, but still only uses expensive carbon nanotubes , and add a separation and shaping process, so it is not suitable for large-scale low-cost production

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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  • A kind of carbon nanofiber paper and preparation method thereof
  • A kind of carbon nanofiber paper and preparation method thereof
  • A kind of carbon nanofiber paper and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] Subjecting solid carbon nanofibers to HNO 3 / H 2 SO 4 (Volume ratio 1:3) Soak in mixed acid for 2 hours, take it out, wash with acid, and obtain carbon nanofibers with modified functional groups. Add 0.005 mol / L sodium lauryl sulfate solution to the carbon nanofibers modified with functional groups, stir well, and disperse evenly. Add flocculant iron sulfate, filter naturally, press, and dry at 40°C under low pressure to make carbon nanofiber paper.

Embodiment 2

[0040] Exposure of multi-walled carbon nanotubes to HNO 3 / H 2 SO 4 (Volume ratio 1:3) Soak in mixed acid for 4 hours, take it out, wash with acid, and obtain carbon nanofibers with modified functional groups. Add 0.01 mol / L sodium lauryl sulfate solution to the carbon nanofibers modified with functional groups, stir well, and disperse evenly. Add flocculant calcium chloride, naturally filter, press, and dry at 40°C under low pressure to make carbon nanofiber paper.

Embodiment 3

[0042] Subjecting single-walled carbon nanofibers to HNO 3 / H 2 SO 4 (Volume ratio 1:3) Soak in mixed acid for 2 hours, then place in H 2 o 2 / H 2 SO 4 (Volume ratio 1:4) soaked for 0.5 hours, taken out, washed with acid, and obtained carbon nanofibers with modified functional groups. Add 0.05 mol / L sodium lauryl sulfate solution to the carbon nanofibers modified with functional groups, stir well, and disperse evenly. Add flocculant acetone ferric sulfate, filter naturally, press, and dry under normal pressure at 80°C to make carbon nanofiber paper.

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 carbon nanofiber paper and a preparation method for the carbon nanofiber paper. According to the invention, the carbon nanofiber paper is prepared by adopting nanoscale carbon fiber, and the carbon nanofiber is combined with van der waals force therebetween relying on hydrogen bonds. The preparation method for the carbon nanofiber paper comprises the procedures of surface finish of carbon fiber, dispersing, flocculating, filtering and squeezing and drying. The carbon nanofiber paper, disclosed by the invention, has the advantages of large specific surface area, electrical conductivity, air permeability and hydrophilia; and the preparation method for the carbon nanofiber paper is applied to low-cost and large-scale industrial production.

Description

technical field [0001] The invention relates to the field of nanoscale carbon fibers, in particular to a carbon nanofiber paper and a preparation method thereof. Background technique [0002] Carbon nanofibers in a broad sense are nanoscale carbon fibers relative to ordinary micron-scale carbon fibers. According to the structure, they can be divided into carbon nanotubes (hollow carbon nanofibers) and solid carbon nanofibers. Carbon nanotubes are divided into single-walled carbon nanotubes. and multi-walled carbon nanotubes, while solid carbon nanofibers are fibrous nanocarbon materials rolled from multi-layer graphite sheets. quasi-one-dimensional materials. At present, there are three main ways to prepare carbon nanofibers: 1. Graphite arc method. In 1991, Japanese scientist Iijima first observed carbon nanotubes prepared by graphite arc method; 2. Laser evaporation method. This method is mainly used to synthesize single Wall carbon nanotubes, this method has low yield a...

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 Patents(China)
IPC IPC(8): D21H13/50D21H21/08D21H21/14
Inventor 肖辉刘超刘铸孙力
Owner KUNMING NATAI TECH CO LTD
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