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Surface modification aramid fiber and preparation method thereof

A technology for modifying the surface of aramid fiber, applied in the field of organic fiber and its preparation, can solve the problems of organic solvent pollution of the environment, low comprehensive performance of composite materials, poor interface adhesion between aramid fiber and resin composite materials, etc., to achieve Effects of improving mechanical properties and thermal properties, reducing usage and emissions, and improving bond strength

Active Publication Date: 2016-07-27
SHENZHEN SELEN SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of insufficient surface activity of modified aramid fibers in the prior art, poor interfacial bonding force between aramid fibers and resin composite materials, low comprehensive performance of composite materials, and environmental pollution by organic solvents in the modification process, etc., and provides a Novel aramid fiber with high surface activity and green environmental protection and preparation method thereof

Method used

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  • Surface modification aramid fiber and preparation method thereof
  • Surface modification aramid fiber and preparation method thereof
  • Surface modification aramid fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Preparation of surface treatment agent: 100 parts of 3-(4-methylenecyclohexyl isocyanate) phenyl isocyanate and 0.5 part of stannous octoate are mixed and dissolved in ethylene carbonate to form a uniform solution with a mass fraction of 30% to obtain a surface treatment agent.

[0025] 2) Preparation of hyperbranched polyurethane: add 10 parts of trimethylhexamethylene diisocyanate, 10 parts of hexaethylene glycol and 0.05 part of stannous octoate into the reaction kettle, heat up to 80 ° C, and stir for 1 hour; add 1 1 part of tributanolamine, while adding 1 part of acetone, stirred for 5 hours; then added 1 part of concentrated hydrochloric acid, stirred for 30 minutes; slowly added the reaction solution to 80 parts of 1,3-propanediol with a mass fraction of 0.5% under high-speed stirring amine aqueous solution, and the temperature was raised to 70° C., and the reaction was stirred for 2 hours to obtain hyperbranched polyurethane.

[0026] 3) Aramid fiber surface...

Embodiment 2

[0029] 1) Preparation of surface treatment agent: 100 parts of 5-(ethyl isocyanate) naphthyl isocyanate and 1 part of di(dodecylthio)dibutyltin are mixed and dissolved in propylene carbonate to form a uniform solution with a mass fraction of 40%. Get a surface treatment.

[0030] 2) Preparation of hyperbranched polyurethane: Add 10 parts of dimethylene diisocyanate, 5 parts of triethylene glycol and 0.1 part of di(dodecylthio)dibutyltin into the reactor, heat up to 60°C, and stir for 2 Add 2 parts of triethanolamine and 2 parts of dimethyl carbonate, and stir for 3 hours; then add 1.5 parts of concentrated hydrochloric acid and stir for 10 minutes; slowly add the reaction solution to 100 parts of 0.15% 1, in an aqueous solution of 4-butanediamine, and the temperature was raised to 80° C., and the reaction was stirred for 1 hour to obtain hyperbranched polyurethane.

[0031] 3) Aramid fiber surface treatment: Pass the aramid fiber through the pressure roller of the oiling mach...

Embodiment 3

[0034] 1) Preparation of surface treatment agent: 100 parts of 4-(2-decenyl isocyanate) phenyl isocyanate and 2 parts of dibutyltin diacetate are mixed and dissolved in ethylene carbonate to form a uniform solution with a mass fraction of 50% to obtain surface treatment agent.

[0035]2) Preparation of hyperbranched polyurethane: add 10 parts of hexamethylene diisocyanate, 10 parts of heptagonal glycol and 0.1 part of dibutyltin diacetate into the reaction kettle, heat up to 65°C, and stir for 1.5 hours; add 1 part of Triisopropanolamine, while adding 3 parts of propylene carbonate, stirred and reacted for 5 hours; then added 1 part of glacial acetic acid, stirred for 50 minutes; slowly added the reaction solution to 90 parts of high-speed stirred aqueous solution with a mass fraction of 0.4% ethylenediamine , and heated up to 60°C, stirred and reacted for 3 hours to obtain hyperbranched polyurethane.

[0036] 3) Aramid surface treatment: Pass the aramid fiber continuously th...

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Abstract

The invention discloses surface modification aramid fiber and a preparation method thereof.Aramid fiber is grafted to obtain aramid fiber with an isocyanate group, an amino group and / or a hydroxyl group and other polar groups on the surface.Diisocyanate and polyethylene glycol react to generate a polyurethane molecular chain with an isocyanate end group, and the polyurethane molecular chain then sequentially reacts with a triol amine compound and a diamine compound to be subjected to chain expanding reaction and coupling reaction to prepare hyperbranched polyurethane; aramid fiber is subjected to graft modification sequentially through a diisocyanate compound and prepared hyperbranched polyurethane to obtain aramid fiber grafted with lots of groups on the surface.The groups on the surface of the prepared modification aramid fiber are high in activity, the adhesiveness of the surface of aramid fiber is improved, the active groups can form chemical bonds together with various types of resin, and the interface strength of aramid fiber and resin composite is enhanced.

Description

technical field [0001] The invention relates to an organic fiber and a preparation method thereof, in particular to an aramid fiber and a preparation method thereof. Background technique [0002] Aramid fiber is a new type of high-tech synthetic fiber with high strength, high modulus, high heat resistance, low expansion, low thermal conductivity, chemical corrosion resistance and excellent dielectric properties. , electronics and sporting goods and other fields have a wide range of applications. Among the many uses of aramid fiber, more than 30% of the proportion is used as a reinforcing material to prepare resin-based composite materials. However, due to the special structure of aramid fiber, it has a smooth surface, less active groups, low surface energy, and poor adhesion to the resin matrix, which greatly affects the mechanical properties of the composite material, which limits the use of aramid fibers. The superiority of the fiber itself is brought into play. Therefo...

Claims

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Application Information

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IPC IPC(8): D06M15/564C08G18/32C08L63/00C08L77/10D06M101/36
CPCC08G18/3206C08G18/3228C08G18/3281C08L63/00C08L2205/16D06M15/564D06M2101/36C08L77/10
Inventor 郭辉梁文耀
Owner SHENZHEN SELEN SCI & TECH CO LTD
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