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Nano SiO2 modified emulsion type carbon fiber sizing agent and preparation method thereof

An emulsion-type carbon fiber and nanotechnology, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of easy agglomeration, affecting the particle size distribution and stability of sizing agents, etc., to achieve enhanced interface performance, heat resistance, good The effect of applying the foreground

Inactive Publication Date: 2015-03-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But nano-SiO 2 It is easy to agglomerate in aqueous solution, which affects the particle size distribution and stability of sizing agent

Method used

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  • Nano SiO2 modified emulsion type carbon fiber sizing agent and preparation method thereof
  • Nano SiO2 modified emulsion type carbon fiber sizing agent and preparation method thereof
  • Nano SiO2 modified emulsion type carbon fiber sizing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Epoxy resin EP-44: 200g;

[0031] Polyethylene glycol PEG6000: 200g;

[0032] Toluene diisocyanate: 25g;

[0033] Alkylphenol polyoxyethylene ether: 85g;

[0034] nano-SiO 2 : 14.5g;

[0035] Toluene: 100g.

[0036] Add 200g of epoxy resin EP-44, 200g of polyethylene glycol and 100g of toluene into the reaction kettle, heat until completely dissolved and stir well, add 20g of toluene diisocyanate at reflux temperature for 1 hour, and then add 14.5g of nano-SiO 2 With 5g toluene diisocyanate, react for 1h, then add 85g alkylphenol polyoxyethylene ether, stir for 1h, vacuumize, and reduce to room temperature to obtain nano-SiO 2 epoxy emulsifier. On the basis of the obtained epoxy emulsifier, add 1040g of epoxy resin, mix thoroughly at 60°C, and then slowly add deionized water until the phase changes to obtain nano-SiO 2 Emulsion carbon fiber sizing agent with a solid content of 50%.

Embodiment 2

[0038] Epoxy resin EP-44: 200g;

[0039] Polyethylene glycol PEG6000: 180g;

[0040] Toluene diisocyanate: 24g;

[0041] Alkylphenol polyoxyethylene ether: 86g;

[0042] nano-SiO 2 : 14.5g;

[0043]Butanone: 130g.

[0044] Add 200g of epoxy resin EP-44, 180g of polyethylene glycol and 130g of butanone into the reaction kettle, heat until completely dissolved and stir evenly, add 19g of toluene diisocyanate at reflux temperature for 1 hour, and then add 14.5g of nano-SiO 2 With 5g toluene diisocyanate, react for 1h, then add 86g of alkylphenol polyoxyethylene ether, stir for 1h, vacuumize, and reduce to room temperature to obtain nano-SiO 2 epoxy emulsifier. On the basis of the obtained emulsifier, add 1100g of epoxy resin, mix thoroughly at 60°C, and then slowly add deionized water until the phase changes to obtain nano-SiO 2 Emulsion carbon fiber sizing agent with a solid content of 50%.

[0045] from Figure 1-2 It can be found that nano-SiO 2 T...

Embodiment 3

[0049] Epoxy resin EP-20: 180g;

[0050] Polyethylene glycol PEG6000: 170g;

[0051] Toluene diisocyanate: 23g;

[0052] Alkylphenol polyoxyethylene ether: 87g;

[0053] nano-SiO 2 : 12.5g;

[0054] Butanone: 100g.

[0055] Add 180g of epoxy resin EP-20, 170g of polyethylene glycol and 100g of methyl ethyl ketone into the reaction kettle, heat until completely dissolved and stir evenly, add 17.5g of toluene diisocyanate at reflux temperature for 1 hour, and then add 12.5g of SiO 2 With 5.5g toluene diisocyanate, react for 1h, then add 87g alkylphenol polyoxyethylene ether, stir for 1h, evacuate, reduce to room temperature to obtain nano-SiO 2 epoxy emulsifier. Add 1000g of epoxy resin EP-44 on the basis of the obtained emulsifier, mix thoroughly at 60°C, and then slowly add deionized water until the phase changes to obtain nano-SiO 2 Emulsion carbon fiber sizing agent with a solid content of 50%.

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Abstract

The invention discloses a nano SiO2 modified emulsion type carbon fiber sizing agent and a preparation method thereof. The sizing agent is prepared from a nonionic epoxy emulgator, epoxy resin and a water dispersion medium. The preparation method of the nano SiO2 modified emulsion type carbon fiber sizing agent particularly comprises the following steps: adding polyethylene glycol and an organic solvent into epoxy resin, adding a coupling agent at the reflux temperature and reacting for 1-2 hours, adding nano SiO2 and a coupling agent, reacting for 1-2 hours, then adding alkylphenol ethoxylates and stirring for 1-2 hours, vacuumizing and extracting the organic solvent, reducing the temperature to room temperature to obtain the nonionic epoxy emulgator; adding epoxy resin on the basis of the obtained nonionic epoxy emulgator, fully mixing at 50-60 DEG C, then slowly adding adding the water dispersion medium until the phase is converted to obtain the nano SiO2 emulsion type carbon fiber sizing agent. According to the preparation method of the nano SiO2 modified emulsion type carbon fiber sizing agent, nano SiO2 is introduced into a sizing agent system in the process of preparing the sizing agent emulgator; the heat resistance performance of the sizing agent is improved; the problem of dispersion of SiO2 in the sizing agent emulsion is solved.

Description

technical field [0001] The invention relates to a carbon fiber containing nano-SiO 2 Emulsion type sizing agent and preparation method thereof. Background technique [0002] Carbon fiber sizing agent is an important part of carbon fiber composite products, and plays a very important role in the performance of carbon fiber composite materials. The vast majority of carbon fiber sizing agents on the market are based on epoxy resin, which has the advantages of good spreadability and good compatibility with matrix resin, but its heat resistance is affected by the performance of epoxy resin itself. With the application of carbon fiber in polyimide, bismaleimide, silicone resin and other high temperature resistant resins, the improvement of heat resistance of sizing agent is very critical. [0003] nano-SiO 2 It is a high-tech ultra-fine inorganic material with many unique properties, such as: ultra-small size, high specific surface area, outstanding surface adsorption capacity,...

Claims

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Application Information

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IPC IPC(8): D06M15/55D06M11/79D06M15/568D06M15/53D06M101/40
Inventor 刘丽张庆波黄玉东龙军姜大伟武光顺谢非李大龙王芳
Owner HARBIN INST OF TECH
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