Method for preparing organic nanometer rubber particle enhanced epoxy resin self-repairing microcapsule

A technology of self-healing microcapsules and epoxy resin, which is applied in the direction of microcapsule preparation and microsphere preparation, can solve problems such as poor repeatability, unstable performance, and difficulty in controlling rubber particle size, and achieve low cost, stable properties, and reduced Effect of cure shrinkage

Active Publication Date: 2012-10-03
北京睿曼科技有限公司 +2
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, in the method of strengthening and modifying epoxy resin, the carboxyl-terminated liquid nitrile rubber (CTBN) has the best effect and the widest application range. However, the problem with its toughened epoxy resin is that the particle size of the rubber is difficult to control. , unstable performance, poor repeatability

Method used

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  • Method for preparing organic nanometer rubber particle enhanced epoxy resin self-repairing microcapsule
  • Method for preparing organic nanometer rubber particle enhanced epoxy resin self-repairing microcapsule
  • Method for preparing organic nanometer rubber particle enhanced epoxy resin self-repairing microcapsule

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Experimental program
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Effect test

Embodiment 1

[0026] 1) Preparation of composite epoxy resin: 20 g of butyl glycidyl ether 501 resin (purchased from Shanghai Resin Factory) and 80 g of E-51 epoxy resin were stirred evenly, and the bubbles generated by stirring were removed by vacuuming.

[0027] 2) Preparation of nano-phase reinforced epoxy resin: disperse carboxylated nitrile rubber VP-501 powder (purchased from Beijing Petrochemical Research Institute) of 50-100nm in 85g composite epoxy resin with a particle diameter of 15g, stir evenly, and then Scrape the obtained mixture onto the feeding roller of the three-roll mill with a copper scraper, adjust the speed ratio between the front roller, middle roller and rear roller to 1:3:9, and grind the mixture three times in sequence , the first grinding roll spacing is 10 μm, the roll speed of the front roll is 200r / min; the ground mixture is left to stand for three days, and then the second grinding is carried out, the roll spacing is 5 μm, and the roll speed of the front roll ...

Embodiment 2

[0031] 1) Preparation of composite epoxy resin: 20 g of chlorobenzene (purchased from Xilong Chemical Factory, Shantou City, Guangdong Province) and 100 g of E-51 epoxy resin were stirred evenly, and the bubbles generated by stirring were removed by vacuuming.

[0032] 2) Disperse 20g of carboxylated nitrile rubber VP-501 powder (purchased from Beijing Petrochemical Research Institute) with a particle size of 50-100nm into the above-mentioned composite epoxy resin, stir evenly, and then use a copper scraper to obtain the mixture Scrape the plate onto the feed roller of the three-roll mill, adjust the speed ratio between the front roller, middle roller and rear roller to 1:3:9, grind the mixture three times in sequence, and the distance between the rollers for the first grinding is 10 μm, the roll speed of the front roller is 200r / min; the ground mixture is left to stand for three days, and then the second grinding is carried out, the distance between the rolls is 5 μm, the roll...

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Abstract

A method for preparing organic nanometer rubber particle enhanced epoxy resin self-repairing microcapsule includes: (1) dispersing organic nanometer rubber particles into mixture of epoxy resin and diluent of the epoxy resin, evenly stirring, and performing grinding treating through a three-roller grinder to obtain stably dispersed nanophase enhaced epoxy resin; (2) dissolving emulsifier in deionized water to obtain aqueous solution of the emulsifier; and (3) mixing urea, ammonium chloride and resorcinol, adding the mixture into the aqueous solution of the emulsifier, stirring the mixture until the mixture is fully dissolved to obtain a mixed liquor, regulating the pH value of the mixed liquor to be 3.5, adding nanophase enhanced epoxy resins into the mixed liquor, performing emulsification, dropwise adding formaldehyde solution with the concentration of 37wt% into the emulsified liquid, heating the mixture to be 50 DEG C to 60 DEG C to react for 4 hours, filtering, cleaning a filter cake for several times through absolute ethyl alcohol or acetone, and drying to obtain powder. The microcapsule manufactured by the method can further improve solidification toughness of repairing agents and improve mechanical property of composite materials.

Description

technical field [0001] The invention relates to a preparation method of an organic nano-rubber particle reinforced epoxy resin self-repairing microcapsule, in particular to a method for synthesizing an organic nano-rubber particle-reinforced epoxy resin self-repairing microcapsule by an in-situ polymerization method. Background technique [0002] Composite materials have been more and more widely used in various fields of national economy and national defense industry because of their light weight, high strength, good corrosion resistance and other excellent properties. However, during the preparation and use of composite materials, due to the influence of processing technology and the use environment, microcracks are prone to occur inside. The formation and expansion of these microcracks will cause the mechanical properties of the material to decline and lead to the overall failure of the material. Therefore, inhibiting or eliminating the propagation of microcracks inside c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/18C08G14/08C08L63/00C08L9/06C08L33/04C08L9/02C08L13/00
Inventor 张伟赵阳王思捷廖乐平马万鹏张纾于鹤龙
Owner 北京睿曼科技有限公司
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