Wood carbon fiber precursor and preparation method thereof

A carbon fiber precursor and wood technology, which is applied in the field of wood carbon fiber precursor and the preparation of the carbon fiber precursor can solve the problems of environmental hazards, volatile, highly toxic, etc., and achieve the effect of low residue rate and promotion of liquefaction reaction.

Inactive Publication Date: 2013-04-03
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And, the preparation and spinning of this method spinning solution are carried out separately, and the spinning solution contacts with air in the transfer process, and its main component is phenolic resin, is easy to volatilize and highly toxic, and is harmful to surrounding environment and experiment operator. There is a certain danger

Method used

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  • Wood carbon fiber precursor and preparation method thereof
  • Wood carbon fiber precursor and preparation method thereof
  • Wood carbon fiber precursor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] The wood is pulverized into 80-mesh (mesh aperture 0.18mm) powder with a pulverizer, and then the wood powder is mixed with 4 times the weight of wood powder phenol and catalyst sulfuric acid (the mass fraction of sulfuric acid is 36%, and the addition amount is 1% of the weight of phenol. 7%) into a three-necked glass bottle, placed in an oil bath preheated to 140°C, installed a condenser, and started the stirring device (speed 1058rpm) to liquefy wood. The liquefaction time was 2.5 hours to obtain wood liquefaction .

[0049] Add the wood liquefaction and hexamethylenetetramine with 5% weight of the liquefaction into the spinning machine, heat it from 35 °C to the synthesis temperature of 110 °C at a constant speed for 50 min, keep it warm for 10 min, and heat it under N 2 The initial carbon fiber was spun at 110°C under pressure. The spinning process conditions were: the diameter of the spinneret hole was 1.5mm (single hole), the speed of the take-up roll was 100r / mi...

Embodiment 2

[0054] Grind the wood into a 60-mesh powder with a pulverizer, then add the wood powder, 5 times the weight of the wood powder, and catalyst sulfuric acid (the mass fraction of sulfuric acid is 36%, and the amount added is 8% of the weight of the phenol) into a three-necked glass bottle placed in an oil bath preheated to 150°C, installed a condenser, and started the stirring device (speed 1058rpm) to liquefy wood for 2 hours to obtain wood liquefaction.

[0055] Add the wood liquefaction and hexamethylenetetramine with 8% weight of the liquefaction into the spinning machine, heat it from 35°C to the synthesis temperature of 120°C at a constant speed for 70 minutes, keep it warm for 15 minutes, and spin it at 120°C under N2 pressure. The initial carbon fiber, the spinning process conditions are: the diameter of the spinneret hole is 1.2mm (single hole), the speed of the take-up roll is 150r / min, and the distance from the spinneret hole to the take-up roll is 50mm.

[0056] Put ...

Embodiment 3

[0060] Grind the wood into 40-mesh powder with a pulverizer, and then add the wood powder, phenol and catalyst sulfuric acid (the mass fraction of sulfuric acid is 36% and the addition amount is 9% of the weight of phenol) to the three-necked glass bottle placed in an oil bath preheated to 160°C, installed a condenser, and started the stirring device (speed 1058rpm) to liquefy wood for 3 hours to obtain wood liquefaction.

[0061] Add wood liquefaction and glyoxal with 7% weight of liquefaction into the spinning machine, heat from 35°C to synthesis temperature 130°C at a constant speed for 60 minutes, keep warm for 10 minutes, and spin the initial carbon fiber at 130°C under N2 pressure , The spinning process conditions are: the diameter of the spinneret hole is 0.8mm (single hole), the speed of the take-up roll is 200r / min, and the distance from the spinneret hole to the take-up roll is 50mm.

[0062] Put the initial fiber into the curing pool, add 18.5% formaldehyde and 18.5...

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Abstract

The invention relates to a wood carbon fiber precursor and a preparation method of the carbon fiber precursor. The preparation method comprises the following steps: (1) adding phenol into wood, and liquefying the wood by using sulfuric acid as a catalyst to obtain a liquefied wood product; (2) mixing the liquefied wood product and a synthesizing agent, reacting, and spinning to obtain an initial fiber; and (3) curing the initial fiber to obtain the wood carbon fiber precursor. The preparation method is high in liquefying efficiency and low in residue rate; preparation of a spinning solution and a spinning process are carried out at the same time, the carbon fiber precursor can be prepared more easily; and compared with the prior art, the prepared wood carbon fiber precursor has obviously superior quality indexes of crystallinity and orientation degree and has a wider application prospect and a higher economic value.

Description

technical field [0001] The invention relates to the field of chemical fibers, in particular to a woody carbon fiber precursor and a method for preparing the carbon fiber precursor. Background technique [0002] Carbon fiber is a new type of fibrous carbon material with high strength, low density, corrosion resistance, aging resistance, high temperature resistance and easy conductivity. It is an indispensable new material for the development of cutting-edge technologies such as aerospace and military. The base material for replacement. With the development of science and technology and economy, the demand for carbon fiber in various fields is increasing day by day. [0003] my country's carbon fiber development began in the mid-1970s, and has achieved certain results from research to production, but in general, the domestic carbon fiber research and production level is still low, currently only equivalent to foreign countries in the mid-to-late 1970s Level. That is to say, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16C08H8/00D01D5/06
Inventor 张求慧刘志高赵广杰
Owner BEIJING FORESTRY UNIVERSITY
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