A kind of preparation method of water-based epoxy resin sizing agent for carbon fiber

A water-based epoxy resin, epoxy resin curing technology, applied in the direction of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of high cost, poor performance of emulsion type sizing agent, poor carbon fiber reinforcement, etc., to achieve low cost , excellent mechanical properties, easy to glue the effect

Active Publication Date: 2011-11-30
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] In order to solve the problems that the cost of the existing foreign emulsion-type sizing agent is high; the performance of the domestically-researched emulsion-type sizing agent is not good, and the reinforcing effect on carbon fiber is poor, the present invention provides a preparation method of a carbon fiber water-based epoxy resin sizing agent

Method used

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  • A kind of preparation method of water-based epoxy resin sizing agent for carbon fiber
  • A kind of preparation method of water-based epoxy resin sizing agent for carbon fiber

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specific Embodiment approach 1

[0009] Specific embodiment one: the preparation method of carbon fiber water-based epoxy resin sizing agent in this embodiment is realized by the following steps: one, add epoxy resin and water-based epoxy emulsifier by mass ratio 80:20 in the water bath of 70 ℃, then Place in a high-shear dispersing emulsifier, stir at a speed of 1500-16000r / min, and add deionized water dropwise until the phase transfer occurs in the mixed system, and then add deionized water dropwise to the solid content of the mixed system after 20-90 minutes 40% to 50%, continue to stir for 30 minutes to obtain water-based epoxy resin HIT-WE; 2. Add epoxy resin curing agent and water-based epoxy emulsifier in a water bath at 70°C in a mass ratio of 80:20, and then place In the high-shear dispersing emulsifier, stir at a speed of 1500-8000r / min and add deionized water dropwise, and then add deionized water dropwise after 3-5 hours until the solid content of the mixed system is 40%-50%. 3. Dilute the water-b...

specific Embodiment approach 2

[0014] Specific embodiment two: the difference between this embodiment and specific embodiment one is the preparation of water-based epoxy emulsifier in step one: the 250ml four-necked bottle equipped with agitator, reflux condenser and thermometer is placed in 80 ℃ water bath , then add bisphenol A epoxy resin and polyethylene glycol in a molar ratio of 1:1, and stir at a rate of 200 to 500r / min until molten state; heat up to 100°C, add bisphenol A epoxy resin and triphenylphosphine with 0.15% of the total mass of polyethylene glycol, and stirred at a rate of 200-500r / min for 6h, then pour the product into a watch glass to obtain a water-based epoxy emulsifier; put it into a desiccator for preservation . Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0015] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is that in step 1, stirring is performed at a rotational speed of 2000-10000 r / min. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a preparation method of a water-based epoxy resin sizing agent for carbon fibers, which relates to a preparation method of the sizing agent. The invention solves the problems of high cost of the existing foreign emulsion-type sizing agent and poor performance of the domestically researched emulsion-type sizing agent. Method: 1. Prepare water-based epoxy resin; 2. Prepare water-soluble epoxy resin curing agent; 3. Dilute the water-based epoxy resin with deionized water and then disperse to obtain water-based epoxy resin emulsion; 4. Water-based epoxy resin Mix the emulsion with a water-soluble epoxy resin curing agent to obtain a water-based epoxy resin emulsion system; 5. Mix the water-based epoxy resin emulsion system and additives to obtain a water-based epoxy resin sizing agent for carbon fibers. The water-based epoxy resin sizing agent for carbon fibers of the present invention has good performance, good reinforcing effect on carbon fibers, good bundling, smoothness, and flexibility, and can simultaneously satisfy the overall looseness of filaments between fibers, fiber opening, The performance index of crosslinking degree between single fibers, and the cost is low.

Description

technical field [0001] The invention relates to a preparation method of a sizing agent. Background technique [0002] Carbon fiber is a brittle material. In the process of production and processing, it is easy to produce wool and monofilament breakage through mechanical friction, which reduces the strength of carbon fiber. Moreover, due to the existence of wool, the matrix resin cannot fully wet the carbon fiber, making it It is easy to produce pores in the prepared composite material, which will affect the mechanical properties of the composite material, and the wool will also affect the working environment. Therefore, it is necessary to sizing the carbon fiber. The function of sizing is to form a protective film on the surface of the carbon fiber, which not only protects the surface of the carbon fiber during subsequent processing, reduces the breakage of wool and single filaments, but also makes the carbon fiber easy to be bundled. It acts as a transition layer to improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55D06M101/40
Inventor 黄玉东张如良刘丽唐一壬王晓明刘青松景介辉
Owner HARBIN INST OF TECH
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