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Carbon nanotube modified carbon fiber emulsion sizing agent and preparation method

A carbon nanotube modification and carbon nanotube technology, which is applied in carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems affecting the contribution of carbon nanotube interface bonding strength, difficult industrial application, unfavorable environmental protection, etc., to achieve The requirements for equipment and reaction conditions are not harsh, the process is simple, and the effect of continuous industrial production is realized

Inactive Publication Date: 2015-09-02
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent CN102212967A discloses a preparation method of carbon nanotube-modified carbon fiber sizing agent, but the preparation process requires the addition of organic solvents, the steps are cumbersome and not conducive to environmental protection, and it is difficult for industrial application
Patent CN102817241A discloses a preparation method and application of a thermoplastic sizing agent containing carbon nanotubes. However, during preparation, carbon nanotubes are added to an organic solvent, and then thermoplastic resin is directly added to it, and the dispersion effect will be limited by the viscosity of the resin. , easy to produce agglomeration and precipitation of carbon nanotubes, which in turn affects the contribution of carbon nanotubes to the interfacial bonding strength

Method used

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  • Carbon nanotube modified carbon fiber emulsion sizing agent and preparation method
  • Carbon nanotube modified carbon fiber emulsion sizing agent and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh respectively main slurry epoxy resin 1.0g, mixed emulsifier sorbitan fatty acid ester (Span60) and sorbitan fatty acid ester polyoxyethylene ether (Tween 80) 0.3g and deionized water 198.7g, wherein mixed emulsified The mass ratio of agent Span60 and Tween 80 is 1:4, and the HLB value is 12.94. Add the main slurry and emulsifier into deionized water, control the temperature of the system at 60°C, and stir at a high speed of 90 minutes with an emulsifier at a speed of 15,000 rpm, and cool to obtain an epoxy resin emulsion. To the obtained epoxy resin emulsion, 1.0 g of carboxylated multi-walled carbon nanotubes having a length of 1 μm and 1.0 g of polyethylene glycol 4000 were added. After mixing evenly, sonicate for 3 hours, and then stir for 11 hours at a rotational speed of 500 rpm to obtain an emulsion-type carbon fiber sizing agent containing carbon nanotubes. The mass fraction of each component in the sizing agent is shown in Table 1.

[0024] The commercial...

Embodiment 2

[0026] Weigh 1.0g of the main slurry epoxy resin, 0.26g of the mixed emulsifier Span40 and Tween 60, and 141.6g of deionized water, wherein the mass ratio of the mixed emulsifier Span40 and Tween 60 is 3:7, and the HLB value is 12.44. Add the main slurry and emulsifier together into deionized water, control the system temperature to 70°C, and stir at a high speed for 70 minutes with an emulsifier at a speed of 12,000 rpm, and cool to obtain an epoxy resin emulsion. 0.86 g of carboxylated multi-walled carbon nanotubes with a length of 3 μm and 1.07 g of polyethylene glycol 10000 were added to the epoxy resin emulsion. After mixing evenly, sonicate for 2 hours, and then stir for 12 hours at a rotational speed of 600 rpm to obtain an emulsion-type carbon fiber sizing agent containing carbon nanotubes. The mass fraction of each component in the sizing agent is shown in Table 1.

[0027] The commercial T300 carbon fiber was extracted with acetone for 5 hours to remove the size, and...

Embodiment 3

[0029] Weigh 1.0g of the main slurry epoxy resin, 0.25g of the mixed emulsifier Span80 and Tween 40, and 98.75g of deionized water, wherein the mass ratio of the mixed emulsifier Span80 and Tween 40 is 2:3, and the HLB value is 11.08. Add the main slurry and emulsifier into deionized water, control the temperature of the system at 80°C, and stir at a high speed for 40 minutes with an emulsifier at a speed of 10,000 rpm, and cool to obtain an epoxy resin emulsion. 0.75 g of carboxylated multi-walled carbon nanotubes with a length of 5 μm and 1.0 g of polyethylene glycol 4000 were added to the epoxy resin emulsion. After mixing evenly, sonicate for 1 h, and then stir at 700 rpm for 10 h to obtain an emulsion-type carbon fiber sizing agent containing carbon nanotubes. The mass fraction of each component in the sizing agent is shown in Table 1.

[0030] The commercial T700 carbon fiber was extracted with acetone for 6 hours to remove the size, and then the sizing agent was used to...

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Abstract

The invention relates to a carbon nanotube modified carbon fiber emulsion sizing agent. The carbon nanotube modified carbon fiber emulsion sizing agent is prepared by a two-step method, wherein in step 1, an epoxy resin emulsion is prepared from the ingredients in percentage by mass: 0.5-2% of main slurry, 0.15-1.0% of emulsifier and 97-99.35% of deionized water; in step 2, carbon nanotubes are dispersed into the epoxy resin emulsion, wherein the mass percentage of the added carbon nanotubes is 0.5-1.0%, and the mass percentage of an added dispersant is 0.5-1.0%. The carbon nanotube modified carbon fiber emulsion sizing agent has the advantages of being capable of improving the interfacial shear strength and interlayer shear strength of carbon fibers and composite materials thereof and being applicable to industrial application.

Description

technical field [0001] The invention belongs to a carbon fiber sizing agent, in particular to a carbon nanotube modified carbon fiber emulsion sizing agent and a preparation method. Background technique [0002] As a reinforcing material, carbon fiber has excellent properties such as light weight, high specific strength, high specific modulus, high temperature resistance and small thermal expansion coefficient, and is widely used in the composite material industry. However, carbon fiber is a brittle material with high surface inertia, low surface energy, and poor interface adhesion with the matrix, which seriously affects the mechanical properties and interface properties of composite materials. Sizing carbon fiber can solve this problem well. The sizing agent not only protects the carbon fiber, but also can improve the bonding strength between the fiber and the matrix in the carbon fiber composite material, and improve the interface performance and interlayer performance o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/55D06M11/74D06M101/40
Inventor 吕春祥崔瑞禧杨禹朱稼麟曹莉娟张颖新袁淑霞张保平宋考生周芬
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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