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A temperature-resistant emulsion sizing agent for carbon fiber and its preparation method and application

A technology of carbon fiber and sizing agent, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., which can solve the problems of difficult emulsification and high rigidity of sizing agents, and achieve the effects of easy implementation, improved performance and stable properties

Inactive Publication Date: 2016-06-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above disadvantages, the present invention provides a carbon fiber emulsion type sizing agent with modified flexible temperature-resistant epoxy resin as the main slurry, which solves the problem of high rigidity of the temperature-resistant resin and difficult emulsification when preparing the sizing agent

Method used

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  • A temperature-resistant emulsion sizing agent for carbon fiber and its preparation method and application
  • A temperature-resistant emulsion sizing agent for carbon fiber and its preparation method and application
  • A temperature-resistant emulsion sizing agent for carbon fiber and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Synthesis of modified epoxy resin: Add the acetone solution of p-aminophenol epoxy resin (AFG-90) into a three-hole flask equipped with a condensing reflux device, stir at a constant speed of 30°C for 20min, and heat up to 70°C after AFG-90 dissolves evenly. Then, the acetone solution of n-dodecylamine was added dropwise into the three-necked flask, and stirred and reacted at constant temperature for 2.5 hours to obtain modified AFG-90. In the above reaction, the mass ratio of n-dodecylamine to AFG-90 is 20:80, the mass ratio of AFG-90 to acetone is 60:40, and the mass ratio of n-dodecylamine to acetone is 20:80.

[0048] Preparation of sizing agent: preheat the emulsifier NP-10 and Nongru 1601 in a ratio of 50:50, and the penetrant secondary octanol polyoxyethylene ether (JFC-2) to 50°C and stir evenly, then add the above-mentioned main slurry to modify AFG-90. Then, add diluent acetone into the above mixture and stir evenly. The quality of the emulsifier is 10% of t...

Embodiment 2

[0052] Synthesis of modified epoxy resin: Add the acetone solution of 4,4-diaminoxylene methane epoxy resin (AG-80) into a three-hole flask equipped with a condensation reflux device, stir at a constant speed of 40°C for 20 minutes, and AG-80 dissolves evenly Afterwards, the temperature was raised to 95° C., and then the acetone solution of n-dodecylamine was added dropwise into the three-necked flask, and the reaction was stirred at constant temperature for 3 hours to obtain modified AG-80. In the above reaction, the mass ratio of n-dodecylamine to AG-80 is 20:80, the mass ratio of AG-80 to acetone is 70:30, and the mass ratio of n-dodecylamine to acetone is 35:65.

[0053] Preparation of sizing agent: Preheat the emulsifier NP-10 and EL-20 in a ratio of 40:60, and the penetrant secondary octanol polyoxyethylene ether (JFC-2) to 30°C and stir evenly, then add the above-mentioned main slurry to modify AG-80. Then, add diluent methyl ethyl ketone into the above mixture and sti...

Embodiment 3

[0057] Synthesis of modified epoxy resin: Add the acetone solution of AFG-90 into a three-hole flask equipped with a condensing reflux device, stir at a constant speed at 50°C for 20 minutes, and heat up to 110°C after AFG-90 dissolves evenly, and then add positive The acetone solution of dodecylamine was stirred at constant temperature for 3.5 hours to obtain modified AFG-90. In the above reaction, the mass ratio of n-dodecylamine to AFG-90 is 15:85, the mass ratio of AFG-90 to acetone is 40:60, and the mass ratio of n-dodecylamine to acetone is 40:60.

[0058] Preparation of sizing agent: preheat the emulsifier Nongru 1601 and EL-20 in a ratio of 10:90, and the penetrant secondary octanol polyoxyethylene ether (JFC-2) to 55°C and stir evenly, then add the above-mentioned main slurry to modify AFG-90. Then, add the diluent methyl ethyl ketone into the above mixture and stir evenly, the quality of the emulsifier is 8% of the main slurry quality, the quality of the penetrant i...

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Abstract

The invention discloses a temperature-resistant type emulsion sizing agent for a carbon fiber. The temperature-resistant type emulsion sizing agent comprises the following materials: main size, an emulsifying agent, an additive and deionized water, wherein the main size is glycidyl amine type epoxy resin modified by dodecanamine, and in modification, the mass ratio of dodecanamine to the epoxy resin is (10-40) to (60-90); the mass of the emulsifying agent is 5-15% of the mass of the main size; the additive comprises a diluting agent and a penetrating agent, the mass of the diluting agent is 0-100% of the mass of the main size, and the mass of the penetrating agent is 1-5% of the mass of the main size; the mass ratio of the deionized water to the main size is (50-90) to (10-50). The invention also discloses a preparation method and application of the sizing agent. The sizing agent disclosed by the invention is high in stability and does not cause pollution to the environment, and the preparation method is simple; in the presence of a flexible molecule, namely dodecanamine, the carbon fiber has relatively high operability; proved by experiments, after the carbon fiber is treated by the sizing agent, the post processability is obviously improved; and the interface temperature resistance and the interlaminar shear strength (ILSS) of the carbon-fiber-enhanced epoxy resin composite material are also obviously improved.

Description

technical field [0001] The invention relates to a temperature-resistant sizing agent for carbon fibers and its preparation method and application, in particular to a temperature-resistant carbon fiber emulsion-type sizing agent suitable for epoxy resin matrix and its preparation method and application. Background technique [0002] Carbon fiber is widely used in various fields due to its high specific strength, high specific modulus, high temperature resistance and corrosion resistance. However, carbon fiber is a brittle material, and it is easy to cause monofilament breakage and fuzz due to friction during weaving or processing, which reduces the strength of carbon fiber and affects the mechanical properties of composite materials. In order to improve the strength and post-processing performance of carbon fiber, the carbon fiber production line is equipped with a sizing device before winding. Sizing is to coat a layer of protective glue on the surface of carbon fibers to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55D06M15/53C08G59/14C08J5/06C08L63/00C08K9/08C08K7/06D06M101/40
Inventor 葛曷一柳华实马小龙赵卫国
Owner UNIV OF JINAN
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