Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for improving mechanical properties of carbon nanotube fibers by stretching and impregnating organic matter

A technology of carbon nanotube fiber and organic matter, which is applied in the direction of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve problems such as damage to performance, and achieve the effect of improving performance, controlling reaction and improving performance

Active Publication Date: 2020-04-14
DONGHUA UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: while the existing carbon nanotube improves a certain mechanical property, it damages other properties

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for improving mechanical properties of carbon nanotube fibers by stretching and impregnating organic matter:

[0020] (1) The surface of the carbon nanotube fiber is infiltrated with a PAN / DMSO solution of 0.5 times the critical overlap viscosity C*;

[0021] (2) In a closed container, the carbon nanotube fiber is kept at 4cN tension;

[0022] (3) At 150°C, remove the air first, and then fill the container with CO 2 , so that the pressure in the container reaches 10Mpa to reach supercritical CO 2 state, after 1 hour of swelling reaction, release the pressure slowly;

[0023] (4) The above steps (1)-(3) are repeated 4 times to obtain modified carbon nanotube fibers;

[0024] (5) Through the instron test, the strength and modulus of the modified carbon nanotube fiber are increased compared with the fiber before modification, the strength is increased by 110%, and the modulus is increased by 100%. The PAN deposited on the surface is uniform and does not form a ...

Embodiment 2

[0026] A method for improving mechanical properties of carbon nanotube fibers by stretching and impregnating organic matter:

[0027] (1) The surface of the carbon nanotube fiber is infiltrated with a PAN / DMSO solution of 0.5 times the critical overlap viscosity C*;

[0028] (2) in the airtight container of making carbon nanotube fiber keep 1.2cN tension force;

[0029] (3) At 100°C, remove the air first, and then fill the container with CO 2 , so that the pressure in the container reaches 8Mpa to reach supercritical CO 2 state, after 1 hour of swelling reaction, release the pressure slowly;

[0030] (4) The above steps (1)-(3) are repeated 4 times to obtain modified carbon nanotube fibers;

[0031] (5) Through the instron test, the strength and modulus of the modified carbon nanotube fiber are increased compared with the fiber before modification, the strength is increased by 35%, and the modulus is increased by 108%. The PAN deposited on the surface is uniform and does no...

Embodiment 3

[0033] A method for improving mechanical properties of carbon nanotube fibers by stretching and impregnating organic matter:

[0034] (1) The surface of the carbon nanotube fiber is infiltrated with a PAN / DMSO solution of 0.5 times the critical overlap viscosity C*;

[0035] (2) in a sealed container, the carbon nanotube fiber is kept at 8.4cN tension;

[0036] (3) At 200°C, remove the air first, and then fill the container with CO 2 , so that the pressure in the container reaches 8Mpa to reach supercritical CO 2 state, after 1 hour of swelling reaction, release the pressure slowly;

[0037] (4) The above steps (1)-(3) are repeated 4 times to obtain modified carbon nanotube fibers;

[0038] (5) Through the instron test, the strength and modulus of the modified carbon nanotube fiber are increased compared with the fiber before modification, the strength is increased by 4%, and the modulus is increased by 72%. The PAN deposited on the surface is uniform and does not form a th...

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
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
tensionaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for improving mechanical properties of carbon nanotube fibers by drawing and impregnating organic matters. The method is characterized by comprising the following steps: putting the carbon nanotube fibers impregnated with an organic matter solution into a sealed container; introducing CO2 into the container and enabling an inner space of the container to be in a supercritical CO2 state; carrying out swelling reaction and slow pressure relief to obtain modified carbon nanotube fibers; selectively performing high-temperature treatment on the modified carbon nanotube fibers according to the requirements, and performing preoxidized carbonization on the organic matters entering the inner parts of the fibers to form the carbon nanotube fibers with complete carbonstructures. According to the method disclosed by the invention, nascent carbon nanotube fibers in a drawing state are impregnated with the organic matters to be modified in supercritical CO2; the supercritical CO2 can effectively carry the organic matter solution into the surfaces and the inner parts of the fibers, so that tensile modulus and tensile strength of the carbon nanotube fibers are effectively improved. The method disclosed by the invention has the beneficial effects of being economical, environmentally friendly, high in reaction controllability, short in reaction time, simple to operate, suitable for industrial production, and the like.

Description

technical field [0001] The invention relates to a carbon nanotube fiber in supercritical CO 2 The invention discloses a method for improving mechanical properties by stretching and impregnating organic matter, which belongs to the technical field of fiber modification. Background technique [0002] Carbon nanotube fiber is a macroscopic form assembled by a large number of carbon nanotubes. The tensile strength of carbon nanotube fiber can reach more than 1.0GPa stably, but compared with carbon nanotube fiber, carbon nanotube fiber is far less developed. The mechanical advantages that nanotubes should have are mainly due to the weak Van der Waals force between the carbon tubes that make up the fibers, and there are a large number of gaps between the carbon nanotube bundles with less contact area, forming loose and easy to slip with each other. structure, and there are a large number of cavities inside the fiber, and the packing density of carbon tubes is not high, which grea...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/31D06M11/74D06M101/40
CPCD06M11/74D06M15/31D06M2101/40
Inventor 余木火刘百花张辉王凯丽程超滕翠青
Owner DONGHUA UNIV