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Carbon nanotube modified emulsion sizing agent, preparation method and applications thereof

A carbon nanotube modification, carbon nanotube technology, applied in chemical instruments and methods, textiles and papermaking, fibrous fillers, etc., can solve the problem of low interfacial shear strength of composite materials, expensive sizing agents, environmental pollution, etc. question

Inactive Publication Date: 2014-10-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing sizing agent is expensive and pollutes the environment. After using it to process carbon fibers, the shear strength of the composite material interface is not high, and to provide a carbon nanotube modified emulsion sizing agent and Its preparation method and application

Method used

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Effect test

specific Embodiment approach 1

[0043] Specific embodiment one: This embodiment is a carbon nanotube modified emulsion sizing agent consisting of 0.001 to 2 parts by weight of modified carbon nanotubes, 50 to 55 parts of epoxy resin emulsion system, and 0.001 to 5 parts by weight. It is prepared by 1 part of surfactant and 45 parts to 50 parts of deionized water.

[0044] The advantage of this implementation mode:

[0045] 1. In this embodiment, carbon nanotubes are treated with carboxylation, amination or hydroxylation, so that the surface of carbon nanotubes has active functional groups, and then adding a surfactant, combined with ultrasonic conditions, can greatly improve the carbon nanotubes. Dispersibility of tubes in deionized water;

[0046] 2. In this embodiment, a water-based epoxy resin emulsion system is synthesized. The particle size of the system is 300nm to 600nm, which is very stable;

[0047] 3. Prepare the modified carbon nanotubes into an aqueous solution and blend them with the epoxy emu...

specific Embodiment approach 2

[0049] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the modified carbon nanotubes are carboxylated carbon nanotubes, aminated carbon nanotubes or hydroxylated carbon nanotubes. Others are the same as the first embodiment.

specific Embodiment approach 3

[0050] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the preparation method of carboxylated carbon nanotubes is completed according to the following steps: the carbon nanotubes are immersed in a strong oxidation solution, and the power is 400W~800W, Treat in an ultrasonic instrument with a frequency of 20kHz-120kHz for 0.2h-2h, then react in a water bath with a temperature of 40°C-95°C for 3h-12h, then add deionized water to dilute, cool to room temperature and suction filter to obtain a filter residue, which is used for Washing with deionized water and suction filtration until the pH of the washing solution is 7, and finally putting the washed filter residue in a vacuum oven at a temperature of 80°C to 140°C for 2h to 12h to obtain carboxylated carbon nanotubes;

[0051] The strong oxidizing solution is concentrated nitric acid with a mass fraction of 68% to 75%, hydrogen peroxide with a mass fraction of 30% to 40%, strong ox...

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Abstract

The invention discloses a carbon nanotube modified emulsion sizing agent, a preparation method and applications thereof, and relates to an emulsion sizing agent, a preparation method and applications thereof. The invention aims to solve the problems that in the prior art the sizing agent is pricy and generates pollution to the environment and the shearing strength is low in the composite material interface after the carbon fiber is processed by the sizing agent. The carbon nanotube modified emulsion sizing agent is composed of the following raw materials in parts by weight: 0.001 to 2 parts of modified carbon nanotube, 50 to 55 parts of epoxy resin emulsion system, 0.001 to 1 part of surfactant, and 45 to 50 parts of deionized water. The preparation method comprises the following steps: (1) preparing an epoxy resin emulsion system; (2) mixing so as to obtain the carbon nanotube modified emulsion sizing agent. The application method comprises the following steps: making carbon fibers go through a solution tank containing the carbon nanotube modified emulsion sizing agent, then scraping the glue on the surface, washing, and drying so as to obtain the sizing agent modified carbon fibers. The invention can obtain a carbon nanotube modified emulsion sizing agent.

Description

technical field [0001] The invention relates to an emulsion sizing agent and its preparation method and application. Background technique [0002] Carbon fiber has a series of advantages such as small specific gravity, high strength, high modulus, high temperature resistance, and fatigue resistance, and is widely used in aerospace, civil engineering, electronic products, sports and leisure products and other fields. However, carbon fiber is very brittle. During production and processing, wool and monofilaments are easily broken under the action of friction, thus reducing the strength of carbon fiber. At the same time, the wool prevents the resin from fully infiltrating the fiber, making it easy to generate pores during the preparation of the composite material, thereby reducing the mechanical properties of the composite material. However, using a sizing agent to sizing carbon fibers to form a protective film can not only reduce wear and tear during processing, avoid the for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/53D06M11/74C09C1/44C09C3/06C09C3/08C09C3/12
Inventor 王荣国刘文博王杰杨帆矫维成徐忠海
Owner HARBIN INST OF TECH
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