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Carbon fiber emulsion sizing agent improved by carbon nano tube and preparation method of carbon fiber emulsion sizing agent

A carbon nanotube modification and carbon nanotube technology, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of difficulty in uniform dispersion and small size, and achieve simple preparation method, high production efficiency and good effect Effect

Inactive Publication Date: 2011-10-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the small size of inorganic particles, there are certain difficulties in uniform dispersion, so nano-SiO 2 The impact of the amount on the performance of the sizing agent needs to be further studied (Chinese Patent Publication No. CN1632217A, published on June 29, 2005)

Method used

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  • Carbon fiber emulsion sizing agent improved by carbon nano tube and preparation method of carbon fiber emulsion sizing agent
  • Carbon fiber emulsion sizing agent improved by carbon nano tube and preparation method of carbon fiber emulsion sizing agent
  • Carbon fiber emulsion sizing agent improved by carbon nano tube and preparation method of carbon fiber emulsion sizing agent

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Experimental program
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Effect test

Embodiment 1

[0025] (1) Dissolve 100 parts by weight of epoxy resin in 1 part by weight of acetone, then vacuumize and remove the organic solvent to obtain an epoxy resin mixture; add 3 parts by weight of emulsifier in the epoxy resin mixture, heat After reaching the molten state, stir quickly to make the emulsifier and epoxy mixture evenly mixed, the stirring time is 6h, and cool to obtain a viscous paste carbon fiber sizing agent;

[0026] (2) Mix carbon fiber sizing agent (room temperature) and dimethyl sulfoxide to prepare working solution; carboxylated multi-armed carbon nanotubes (length 10-30μm, inner diameter 10-20nm, outer diameter 5-10nm) and working solution Mix, and use an ultrasonic cell pulverizer to sonicate for 3 hours at a power of 300w; add γ-mercaptopropyltrimethoxysilane (KH590) to the resulting mixed solution, and then ultrasonically disperse at 40°C for 2 hours to prepare a carbon fiber sizing agent: A carbon fiber emulsion sizing agent with a carboxylated multi-armed...

Embodiment 2

[0029] (1) 100 parts by weight of epoxy resin are dissolved in 6 parts by weight of acetone, then evacuated and sloughed off the organic solvent to obtain an epoxy resin mixture; add 20 parts by weight of emulsifier in the epoxy resin mixture, heat After reaching the molten state, stir quickly to make the emulsifier and epoxy mixture evenly mixed, the stirring time is 2h, and cool to obtain a viscous paste carbon fiber sizing agent;

[0030] (2) First heat the carbon fiber sizing agent to 40-50°C, and then mix it with N,N-dimethylformamide to prepare a working solution; carboxylated multi-armed carbon nanotubes (length 10-30μm, inner diameter 10-20nm , outer diameter 5-10nm) mixed with the working solution, and ultrasonicated with a power of 600w for 1.5 hours with an ultrasonic cell pulverizer; γ-mercaptopropyltrimethoxysilane (KH590) was added to the obtained mixed solution for ultrasonic dispersion at room temperature for 4 hours, A carbon fiber emulsion sizing agent with a...

Embodiment 3

[0033] Mix the carbon fiber sizing agent (room temperature) with dimethylacetamide to prepare the working fluid. According to the required sizing amount, the concentration of the working fluid is about 3%; -20nm, outer diameter 5-10nm) 0.05 parts by weight are mixed with 100 parts by weight of the working solution, and ultrasonicated with a power of 600w for 1 hour with an ultrasonic cell pulverizer; 2 parts by weight of γ-(methacryloyloxy ) propyltrimethoxysilane (KH570) was ultrasonically dispersed at room temperature for 6 hours; then the unsized carbon fibers coming out of the silk rolls were subjected to sizing treatment, dried with hot air, and collected to obtain carbon fibers.

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Abstract

The invention relates to a carbon fiber emulsion sizing agent improved by a carbon nano tube and a preparation method of the carbon fiber emulsion sizing agent. The carbon fiber emulsion sizing agent comprises a carbon fiber sizing agent, the carbon nano tube, a dispersing agent and a solvent. The preparation method comprises the following steps of: 1, preparing the carbon fiber sizing agent; and 2, adding the carbon fiber sizing agent into the solvent to prepare a sizing working solution, mixing the carbon nano tube and the sizing working solution, performing ultrasonic treatment for 1 to 4 hours at the power of 300 to 600w, adding the dispersing agent, and performing ultrasonic dispersion for 2 to 4 hours to obtain the carbon fiber emulsion sizing agent improved by the carbon nano tube. The carbon fiber emulsion sizing agent has favorable stability, the post processability of carbon fiber can be improved after being processed by the emulsion sizing agent, the interfacial bond strength between the carbon fiber and substrate resin can be enhanced, the shear strength among layers is enhanced, and the performance of a composite material is improved to a certain extent. Moreover, the preparation method is simple, low in cost and environment-friendly.

Description

technical field [0001] The invention belongs to the field of carbon fiber functional emulsion sizing agents, in particular to a carbon nanotube-modified carbon fiber emulsion sizing agent and a preparation method thereof. Background technique [0002] Carbon fibers are widely used as reinforcing materials for thermosetting and thermoplastic matrix composites due to their excellent properties such as high specific strength, high specific modulus, corrosion resistance and high temperature resistance. In the production process of carbon fiber, due to the different process conditions, there are certain differences in the microscopic morphology of the fiber surface, which will inevitably affect the performance of the fiber and its composite materials. On the one hand, the existence of grooves on the fiber surface will help to improve the interfacial bonding between the fiber and the resin, that is, it will help to improve the interfacial performance of the composite material; but...

Claims

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Application Information

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IPC IPC(8): D06M15/55D06M11/74D06M101/40
Inventor 余木火李爽任自飞荣怀苹周世洲田银彩韩克清覃辉林严斌
Owner DONGHUA UNIV
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