Black polyurethane-urea elastic fiber added with carbon nanotube and preparation method thereof

A technology of carbon nanotubes and polyurethane urea, which is applied to the chemical characteristics of fibers, the addition of pigments in spinning liquid, the manufacture of conductive/antistatic filaments, etc. It can solve the problems of weak two-phase interface bonding and difficult dispersion of carbon nanotubes. Problems, achieve good black effect, excellent antistatic effect, excellent heat resistance and high temperature resistance

Active Publication Date: 2014-04-16
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Technical problem: The purpose of this invention is to provide a black polyurethane urea elastic fiber with carbon nanotubes added and its preparation method. This invention uses carbon nanotubes as the colorant of black spandex for the first time, which solves the problem of carbon nanotubes in spandex. Dispersion problems and weak interface binding between two phases

Method used

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  • Black polyurethane-urea elastic fiber added with carbon nanotube and preparation method thereof
  • Black polyurethane-urea elastic fiber added with carbon nanotube and preparation method thereof
  • Black polyurethane-urea elastic fiber added with carbon nanotube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 12g of original carbon nanotubes were dispersed in 500ml of a mixed liquid of concentrated sulfuric acid and concentrated nitric acid and boiled under reflux for 2 hours. Then the acidified carbon nanotubes were repeatedly washed with deionized water, and filtered through a polytetrafluoroethylene microporous membrane until the filtrate was neutral. The carbon nanotubes obtained after washing and filtering are then placed in a vacuum drying oven, and fully dried to obtain surface carboxylated carbon nanotubes. The carboxylated carbon nanotubes were added into 500ml of DMF solvent and treated with ultrasonic for 1 hour. Add 2g of condensation agent DCC and 0.5g of condensation activator HOBT, and stir mechanically for 0.5 hours. Slowly add 40 g of ethylenediamine dropwise, and react at room temperature for 2 hours. Wash and filter the reactant with DMAC, and obtain surface aminated carbon nanotubes after drying; add the aminated carbon nanotubes and 5ml of DMAC to a ba...

Embodiment 2

[0041] 25g of original carbon nanotubes were dispersed in 500ml of a mixed liquid of concentrated sulfuric acid and concentrated nitric acid and boiled under reflux for 2 hours. Then the acidified carbon nanotubes were repeatedly washed with deionized water, and filtered through a polytetrafluoroethylene microporous membrane until the filtrate was neutral. Then, the carbon nanotubes obtained by washing and filtering are placed in a vacuum drying oven, and fully dried to obtain surface carboxylated carbon nanotubes. The carboxylated carbon nanotubes were added to 600ml DMF and sonicated for 1 hour. Add 6g of condensation agent DIC and 0.75g of condensation activator HOBT, and stir mechanically for 0.5 hours. Slowly add 50g of 1,3-propanediamine and N,N'-diethyl-1,3-propanediamine mixture (the mass ratio of the two is 25 / 25), react at room temperature for 3 hours, and use DMAC to react The material was washed, filtered, and dried to obtain surface aminated carbon nanotubes. T...

Embodiment 3

[0044] 36g of original carbon nanotubes were dispersed in 500ml of a mixed liquid of concentrated sulfuric acid and concentrated nitric acid and boiled under reflux for 3 hours. Then the acidified carbon nanotubes were repeatedly washed with deionized water, and filtered through a polytetrafluoroethylene microporous membrane until the filtrate was neutral. The washed and filtered carbon nanotubes were then placed in a vacuum drying oven, and fully dried to obtain surface carboxylated carbon nanotubes; the carboxylated carbon nanotubes were added to 1000ml of DMF, and ultrasonically treated for 2 hours. Add 8 g of condensation agent EDIC and 1.5 g of condensation activator HOBT, and stir mechanically for 0.5 hours. Slowly add 75g of a mixture of 1,5-pentanediamine and N,N'-dimethyl-1,3-propanediamine (the mass ratio of the two is 50 / 25), react at room temperature for 3 hours, and use DMAC to The reactants are washed, filtered, and dried to obtain surface aminated carbon nanotu...

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Abstract

The invention discloses black polyurethane-urea elastic fiber added with a carbon nanotube and a preparation method thereof. In the elastic fiber, the carbon nanotube is used as black packing of spandex; after the carboxylation and amination treatment on the surface, the carbon nanotube can be uniformly dispersed in spandex and forms an effective chemical bonding effect with polymer molecules; the addition amount of the carbon nanotube is 0.01-1% of the mass of the polyurethane-urea elastic fiber. In the invention, the carbon nanotube is used as a coloring agent of black spandex for the first time, and the problem of difficult dispersion of the carbon nanotube in spandex and the shortcoming of weak bonding effect of a two-phase interface are avoided. The black spandex prepared by the method has good black effect and color fastness, high mechanical strength, high elongation, low volume resistivity and excellent antistatic effect; moreover, the black spandex has excellent heat resistance and high temperature resistance and can endure long-time high-temperature boiling while the retention rate of mechanical strength is high.

Description

technical field [0001] The invention belongs to the technical method of preparing polyurethane urea elastic fiber, in particular to a preparation method of black polyurethane urea elastic fiber added with carbon nanotubes. Background technique [0002] Polyurethane urea elastic fiber (referred to as "spandex") is widely used in high-end clothing, sweatshirts, underwear, socks and other textile fields due to its excellent mechanical properties and good resilience. Spandex is usually blended with other fibers, and then made into corresponding fabrics through certain dyeing and finishing processes. After the dyed spandex-containing fabric or fabric is washed in hot water or used for a long time, there will be a "white" phenomenon caused by the fading of the spandex yarn. This is mainly due to the fact that most of the dyes are only attached to the surface of the spandex yarn during the dyeing process and cannot penetrate into the interior of the spandex yarn. Using spandex wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/04D01F1/09C08G18/48
Inventor 许图远梁红军冯益虎邵晓林毛植森费长书席青周建军
Owner ZHEJIANG HUAFENG SPANDEX
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