A kind of surface modification method of aramid fiber

A kind of aramid fiber and surface modification technology, which is applied in the surface modification of aramid fiber, in the field of synergistic modification of the surface of aramid fiber by hyperbranched polysiloxane and graphene oxide, which can solve problems such as unfavorable graphene. , to achieve the effect of improving the tensile strength of monofilament, enhancing the bonding strength, and the potential of large industrial applications

Active Publication Date: 2022-02-22
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems, the present invention provides a method for surface modification of aramid fiber, to further improve the monofilament strength of the fiber itself while improving the aramid fiber / rubber interface strength, effectively avoiding the problems used in the prior art. Graphene modified on the surface of aramid fiber is not conducive to the defect of modification reaction

Method used

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  • A kind of surface modification method of aramid fiber
  • A kind of surface modification method of aramid fiber
  • A kind of surface modification method of aramid fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1As shown, the surface modification methods of aramid fibers include:

[0038] Step 1: cleaning and drying of the surface of the aramid fiber;

[0039] Step 2: pretreatment of the surface of the aramid fiber;

[0040] Step 3: functionalization of graphene oxide GO;

[0041] Step 4: Synergistic modification of hyperbranched polysiloxane and graphene oxide GO.

[0042] The cleaning and drying of the surface of the aramid fiber includes: washing the aramid fiber with ethyl acetate and acetone in turn to obtain the cleaned aramid fiber, and then placing the cleaned aramid fiber in a vacuum oven at a temperature of 100°C Drying under conditions until the dried aramid fiber is obtained.

[0043] The frequency of washing the aramid fibers alternately with ethyl acetate and acetone is 5 times.

[0044] The pretreatment of the surface of the aramid fiber includes: immersing the dried aramid fiber in a 2g / L dopamine hydrochloride solution, the dopamine hydroch...

Embodiment 2

[0067] Surface modification methods of aramid fibers, including:

[0068] Step 1: cleaning and drying of the surface of the aramid fiber;

[0069] Step 2: pretreatment of the surface of the aramid fiber;

[0070] Step 3: functionalization of graphene oxide GO;

[0071] Step 4: Synergistic modification of hyperbranched polysiloxane and graphene oxide GO.

[0072] The cleaning and drying of the surface of the aramid fiber includes: washing the aramid fiber with ethyl acetate and acetone in turn to obtain the cleaned aramid fiber, and then placing the cleaned aramid fiber in a vacuum oven at a temperature of 100°C Drying under conditions until the dried aramid fiber is obtained.

[0073] The frequency of washing the aramid fiber with ethyl acetate and acetone in turn is 8 times.

[0074] The pretreatment of the surface of the aramid fiber includes: immersing the dried aramid fiber in a 2g / L dopamine hydrochloride solution, the dopamine hydrochloride solution is adjusted to a ...

Embodiment 3

[0091] Surface modification methods of aramid fibers, including:

[0092] Step 1: cleaning and drying of the surface of the aramid fiber;

[0093] Step 2: pretreatment of the surface of the aramid fiber;

[0094] Step 3: functionalization of graphene oxide GO;

[0095] Step 4: Synergistic modification of hyperbranched polysiloxane and graphene oxide GO.

[0096] The cleaning and drying of the surface of the aramid fiber includes: washing the aramid fiber with ethyl acetate and acetone in turn to obtain the cleaned aramid fiber, and then placing the cleaned aramid fiber in a vacuum oven at a temperature of 100°C Drying under conditions until the dried aramid fiber is obtained.

[0097] The frequency of washing the aramid fiber with ethyl acetate and acetone alternately is 10 times.

[0098] The pretreatment of the surface of the aramid fiber includes: immersing the dried aramid fiber in a 2g / L dopamine hydrochloride solution, the dopamine hydrochloride solution is adjusted ...

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Abstract

A method for surface modification of aramid fiber, step 1: cleaning and drying of the surface of aramid fiber; step 2: pretreatment of the surface of aramid fiber; step 3: functional treatment of graphene oxide GO; step 4: overrun Synergistic modification of polysiloxane and graphene oxide GO. Due to the addition reaction between the mercapto group and the rubber double bond and the improvement of the surface energy after modification, and the graphene oxide grafted on the surface of the aramid fiber can convert its own fracture energy into interface energy, the present invention can significantly improve the surface energy of the aramid fiber. The bonding strength between the rubber matrix and the rubber matrix; in addition, because the wrapping effect of functionalized graphene oxide nanosheets and mercapto hyperbranched polysiloxane on the fiber surface can effectively assist the fiber to bear the tensile stress, the monofilament strength has also been significantly improved. improve. The invention has great industrial application potential, and because of the universality of the polydopamine initial layer, the aramid fiber / rubber composite material has greater application prospects.

Description

technical field [0001] The invention relates to the technical field of modification of aramid fiber, in particular to a method for surface modification of aramid fiber, in particular to a method for synergistically modifying the surface of aramid fiber by hyperbranched polysiloxane and graphene oxide . Background technique [0002] Composite material is a new material formed by optimizing the combination of material components with different properties by using advanced material preparation technology. High-performance long-fiber-reinforced (such as aramid fiber, carbon fiber, ultra-high molecular weight polyethylene fiber, etc.) composite materials are widely used in aerospace engineering, weapon engineering, protective engineering and other fields because of their unique excellent performance. Among them, aramid fiber is often used as the skeleton material of rubber-based composite materials such as tires and conveyor belts due to its excellent toughness, modulus and stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/37D06M11/74D06M15/643D06M101/36
CPCD06M15/37D06M11/74D06M15/643D06M2101/36
Inventor 杨旋涂群章沈新民潘明蒋成明
Owner ARMY ENG UNIV OF PLA
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