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In-situ and inclusion polymerization process of preparing composite particle/epoxy resin nano material

A nanoparticle and composite material technology is applied in the field of in-situ and encapsulated polymerization to prepare nanoparticle/epoxy resin composite materials, which can solve the problems that the advantages are not fully reflected, it is difficult to achieve nano-state dispersion, and inorganic particles are uniformly dispersed. Achieve the effect of low cost, less pollution and convenient operation

Inactive Publication Date: 2005-01-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually these modifications are achieved by direct blending of inorganic nanoparticles and epoxy resin; and it is often difficult to disperse the inorganic particles uniformly by this method; especially when the particles are nanoscale, due to the difference in density and polarity and Due to the strong self-aggregation of nanoparticles, it is difficult to achieve true nano-state dispersion, and many particles are in an agglomerated state, so that many advantages of nano-particle modified epoxy resin composite materials are not fully reflected.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1), 24.10 grams of bisphenol A and 51ml of NaOH solution with a mass concentration of 10% were added to a 250ml round bottom flask, heated up and started stirring, dissolved at 70°C, then cooled to 50°C, and 3g of nano-CaCO was added 3 Particles, the stirring rate is controlled at 500r / min, so that the nanoparticles are fully dispersed in the medium;

[0014] 2) Add 10ml of epichlorohydrin dropwise at 50°C, drop it for 30 minutes, raise the temperature to 80°C after the dropwise addition, inject cold water after 2 hours of reaction, stop stirring after the resin sinks, remove the water phase, start stirring and inject Hot water, after stirring for 15 minutes, inject cold water, stop stirring to remove the water phase, repeat this until the pH value is equal to 7, and then carry out dehydration under normal pressure and dehydration under reduced pressure to obtain nano-CaCO 3 / Epoxy Composite 27.97 g.

Embodiment 2

[0016] 1), 48.20 grams of bisphenol A and 65ml of NaOH solution with a mass concentration of 15% were added to a 250ml round bottom flask, the temperature was raised and stirring was started, dissolved at 70°C, then cooled to 50°C, and 6 grams of nano-CaCO was added 3 Particles, the stirring rate is controlled at 500r / min, so that the nanoparticles are fully dispersed in the medium;

[0017] 2) Add 20ml of epichlorohydrin dropwise at 50°C, drop it for 40 minutes, raise the temperature to 90°C after the dropwise addition, inject cold water after 8 hours of reaction, stop stirring after the resin sinks, remove the water phase, start stirring and inject Hot water, after stirring for 15 minutes, inject cold water, stop stirring to remove the water phase, repeat this until the pH value is equal to 7, and then carry out dehydration under normal pressure and dehydration under reduced pressure to obtain nano-CaCO 3 / Epoxy Composite 55.56 g.

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Abstract

The present invention discloses an in-situ and inclusion polymerization process of preparing composite nano particle / epoxy resin material. The epoxy resin is biphenol A type epoxy resin; and the nano particle is nano SiO2, nano montmorillonite, nano TiO2, nano CaCO3 or nano ZnO. Via the in-situ polymerization and inclusion polymerization on the surface of nano inorganic particles, the inorganic nano particles with strong autoagglutination are dispersed homogeneously in epoxy resin matrix. The preparation process using water as solvent is simple, low in cost and less pollutant, needs no solvent recover equipment and is favorable to application in industry.

Description

technical field [0001] The invention relates to a process for preparing nanoparticle / epoxy resin composite material by in-situ and wrapping polymerization. Background technique [0002] Epoxy resin is an important variety in the field of synthetic resin, which is famous for its excellent mechanical properties, electrical properties and bonding properties. At present, epoxy resin has been widely used in adhesives, coatings, electrical insulation materials, structural materials and other fields. It plays an important role in industries such as electronics, machinery manufacturing, aviation, shipbuilding, and national defense. Since the 1990s, my country's epoxy resin has developed rapidly, but its production capacity only accounts for 9% of the world's total production capacity. Compared with the foreign advanced level, my country's epoxy resin industry has a large gap, which is mainly reflected in the backward technology, few varieties, poor qualit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/00C08L63/00
Inventor 王立俞豪杰江山石全
Owner ZHEJIANG UNIV
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