Silicon dioxide microsphere modified multi-scale hybrid carbon fiber and preparation method and application thereof

A technology of silica and nano-silica, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of harsh reaction conditions, influence of carbon fiber body strength, cumbersome process, etc., to increase electrostatic adsorption capacity and improve interface Effects of combined strength and interfacial toughness

Active Publication Date: 2021-03-19
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, multi-scale hybrid modification often involves grafting nano-reinforced particles such as nanotubes and graphene onto the surface of carbon fibers through chemical grafting.

Method used

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  • Silicon dioxide microsphere modified multi-scale hybrid carbon fiber and preparation method and application thereof
  • Silicon dioxide microsphere modified multi-scale hybrid carbon fiber and preparation method and application thereof
  • Silicon dioxide microsphere modified multi-scale hybrid carbon fiber and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] (1) Carbon fiber surface oxidation treatment: After removing the sizing agent on the surface of the commercially available carbon fiber with acetone, it was oxidized with concentrated nitric acid for 2 hours, washed with deionized water, and then vacuum-dried to obtain surface oxidized carbon fiber (CFO);

[0054](2) Preparation of phosphazene-modified carbon fiber: add 15g of hexachlorocyclotriphosphazene (HCCP) into 2500mL of anhydrous acetonitrile, stir and dissolve; take a bundle of carbon oxide fiber (CFO) of about 30g and add it to the HCCP / acetonitrile solution, drop 100 mL of triethylamine was added, and the reaction was stirred at 50° C. for 2 h to obtain carbon fiber CFO-HCCP grafted with HCCP.

[0055] (3) Add 26.5g polyethyleneimine (1800g / mol) into the solution after the reaction in step (2), stir and dissolve, continue to react for 6h, take out the modified carbon fiber, wash 3 times with anhydrous acetonitrile to obtain polyphosphazene Coating modified ca...

Embodiment 2

[0062] (1) Carbon fiber surface oxidation treatment: After removing the sizing agent from the surface of the commercially available carbon fiber with acetone, it was oxidized with concentrated nitric acid for 1 hour, washed with deionized water, and then vacuum-dried to obtain surface oxidized carbon fiber (CFO);

[0063] (2) Preparation of phosphazene-modified carbon fiber: Add 10g of hexachlorocyclotriphosphazene (HCCP) into 2000mL of anhydrous acetonitrile, stir to dissolve; take about 20g of a bundle of carbon oxide fiber (CFO) into the HCCP / acetonitrile solution, drop 65 mL of triethylamine was added, and the reaction was stirred at 50° C. for 2 h to obtain carbon fiber CFO-HCCP grafted with HCCP.

[0064] (3) Add 17.6g polyethyleneimine (1800g / mol) into the solution after step (2) reaction, stir to dissolve, continue to react for 5h, take out the modified carbon fiber, wash 3 times with anhydrous acetonitrile to obtain polyphosphazene Coated modified carbon fiber.

[00...

Embodiment 3

[0071] (1) Carbon fiber surface oxidation treatment: After removing the sizing agent from the surface of the commercially available carbon fiber with acetone, it was oxidized with concentrated nitric acid for 1 hour, washed with deionized water, and then vacuum-dried to obtain surface oxidized carbon fiber (CFO);

[0072] (2) Preparation of phosphazene modified carbon fiber: add 15g of hexachlorocyclotriphosphazene (HCCP) into 3000mL of anhydrous acetonitrile, stir and dissolve; take a bundle of carbon oxide fiber (CFO) of about 20g into the HCCP / acetonitrile solution, drop 5 mL of triethylamine was added, and after stirring and reacting for 5 h at 50° C., the carbon fiber CFO-HCCP grafted with HCCP was obtained.

[0073] (3) Add 37.5g polyethyleneimine (600g / mol) into the solution after the reaction in step (2), stir and dissolve, continue to react for 8h, take out the modified carbon fiber, wash 3 times with anhydrous acetonitrile to obtain polyphosphazene Coated modified ca...

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Abstract

The invention discloses a silicon dioxide microsphere modified multi-scale hybrid carbon fiber, and a preparation method thereof and application of the carbon fiber in preparation of a composite material. The preparation method comprises the following steps: (1) carrying out oxidation treatment on the surface of the carbon fiber to obtain a surface oxidized carbon fiber; (2) grafting phosphonitrilic chloride trimer to the surface of the surface oxidized carbon fiber to obtain the carbon fiber modified by grafting of the phosphonitrilic chloride trimer; (3) carrying out an in-situ polymerization reaction on the phosphonitrilic chloride trimer and polyethyleneimine on the surface of the carbon fiber modified by grafting of the phosphonitrilic chloride trimer, and thus obtaining a polyphosphazene coating modified carbon fiber with positive charges on the surface; and (4) dipping the polyphosphazene coating modified carbon fiber with the positive charges into a nano silicon dioxide microsphere colloidal solution, and attaching the nano silicon dioxide microspheres with negative charges to the surface of the polyphosphazene coating modified carbon fiber through electrostatic adsorptionto obtain the silicon dioxide microsphere modified multi-scale hybrid carbon fiber.

Description

technical field [0001] The invention relates to the technical field of carbon fiber surface modification, in particular to a multi-scale hybrid carbon fiber modified by silica microspheres and its preparation method and application. Background technique [0002] Carbon fiber reinforced resin-based advanced composite materials have a series of advantages such as light weight, high strength, design strength, and excellent fatigue resistance. Moreover, carbon fiber reinforced resin-based advanced composite materials have a series of excellent properties such as high specific strength, high specific modulus, and strong designability, and are widely used in aerospace, transportation, and sports and leisure fields. [0003] Due to factors such as smooth surface and chemical inertness, carbon fiber has poor compatibility with resin matrix, resulting in unsatisfactory interfacial properties of composite materials. Carbon fiber often needs to be surface treated first, and then compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/687D06M15/61D06M11/79D06M11/64C08J5/06C08K9/02C08K9/04C08K7/06C08L63/00D06M101/40
CPCD06M15/687D06M15/61D06M11/79D06M11/64C08J5/06C08K9/02C08K9/04C08K9/08C08K7/06D06M2101/40C08J2363/00
Inventor 徐海兵祝颖丹邢开马芸芸颜春刘东
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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