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Method for increasing the tensile strength of carbon nanotube fiber aggregates

A technology of carbon nanotube fiber and tensile strength, which is applied in the direction of carbon nanotube, nanocarbon, fiber chemical characteristics, etc., can solve the problems of low CNT dispersion and insignificant improvement of CNT tensile strength, so as to improve the tensile strength Effect

Active Publication Date: 2022-05-24
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In the present invention, tension with a specific strength is used instead of ultrasonic treatment, which has the problems of low dispersion of CNTs and insignificant improvement in tensile strength of CNTs

Method used

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  • Method for increasing the tensile strength of carbon nanotube fiber aggregates
  • Method for increasing the tensile strength of carbon nanotube fiber aggregates
  • Method for increasing the tensile strength of carbon nanotube fiber aggregates

Examples

Experimental program
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Effect test

Embodiment 1 to 13

[0053] like figure 1 As shown, one end of a CNT fiber aggregate (0.007 mg) was fixed on a glass rod, and the aggregate of CNT fibers was set so that a tension / tex in the range of 3 to 40 cN / tex was applied thereon, so as to carry out Example 1 to each of 13. CSA (0.01 mL) as a CNT dispersant was sprayed on the CNT fiber aggregates via a syringe. When the CSA treatment was complete, acetone (1 mL) was sprayed onto the CNT fiber aggregates via a syringe to remove residual CSA and shrink the CNT fiber aggregates. The CNT fiber aggregates were heat-treated at 300 °C for 30 min in an air atmosphere to remove residual CSA and acetone in the CNT fiber aggregates. The relative tensile strength of the heat-treated CNT fiber aggregates was measured using a FAVIMAT+ instrument from Textechno, Germany (load cell range: 210 cN, gauge length: 2.0 cm) at a speed of 2 mm / min. The measurement results are shown in Table 1 below. In addition, in this embodiment, the relative tensile strength...

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Abstract

The present invention relates to a method for increasing the tensile strength of carbon nanotube (CNT) fiber aggregates, comprising dispersing the CNT fiber aggregates with chlorosulfonic acid (CSA), followed by heat treatment, wherein a specific magnitude of tension is applied during the heat treatment, The alignment level and tensile strength of the CNT fiber aggregates are thereby increased.

Description

technical field [0001] This application claims priority from Korean Patent Application No. 10-2017-0079444 filed on Jun. 23, 2017, the disclosure of which is incorporated herein by reference. [0002] The present invention relates to a method for increasing the tensile strength of carbon nanotube (CNT) fiber aggregates. Background technique [0003] Carbon nanotubes (CNTs) are new materials in which hexagons composed of carbon atoms are interconnected to form tubes. CNTs have electrical conductivity similar to copper and have the same thermal conductivity as diamond, which is the most thermally conductive in nature. CNTs are up to 100 times stronger than iron, and their electrical and thermal properties are also excellent. It is expected to play a role in many industries such as future electrical and electronics, infocomm, energy, biology, aerospace and sports. [0004] The mechanical strength, especially the tensile strength, of the CNT itself is very high, exceeding 100...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/168
CPCC01B32/168C01P2004/13C01B2202/26D02G3/16C01P2004/03D01F11/12D01F11/14D01F11/16D10B2101/122C01B32/174
Inventor 吴有镇金注翰金知恩李在宖李沅宰
Owner LG CHEM LTD