Organic-inorganic hybrid core-shell particle as well as preparation method and application thereof

A core-shell particle and inorganic technology, applied in the field of core-shell particles and their preparation, can solve the problems of poor dispersion of core-shell particles, increase in mechanical properties such as strength, increase in epoxy resin viscosity, etc., and achieve sufficient toughening and strengthening effect. , the effect of improving tensile properties, toughness and strength

Inactive Publication Date: 2017-05-24
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the relevant research results of core-shell nanoparticles modified epoxy resin still need to be further developed and improved, mainly in the following two aspects: On the one hand, when the concentration of core-shell particles is high, the viscosity of epoxy resin increases, which affects its workability , and the dispersion of core-shell particles in the resin matrix is ​​not good, and they are easy to agglomerate, resulting in a decrease in

Method used

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  • Organic-inorganic hybrid core-shell particle as well as preparation method and application thereof
  • Organic-inorganic hybrid core-shell particle as well as preparation method and application thereof
  • Organic-inorganic hybrid core-shell particle as well as preparation method and application thereof

Examples

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Embodiment 1

[0027] Add 26g of diethylenetriamine to a 250mL three-necked flask, place it in an ice-water bath, add methyl acrylate-methanol solution (26g of methyl acrylate dissolved in 50mL of methanol) dropwise, react for 24 hours after the dropwise addition, add 1g SiO 2 Nanoparticles, 0.5g triblock copolymer P123, 0.5g triamine, stirred gently for 12h, removed methanol at 90°C using a rotary evaporator, then moved to an oil bath and heated to 150°C, 2 Stir the reaction for 4 hours under protection, wash the product three times with THF, and centrifuge for 5 minutes (5000rpm) to obtain a pale white powder, put it in a vacuum oven and dry at 80°C for 12 hours to obtain HBP-SiO 2 Organic-inorganic hybrid core-shell particles.

[0028] figure 2 For the HBP-SiO prepared in this embodiment 2 SEM images of organic-inorganic hybrid core-shell particles, by figure 2 It can be seen that the HBP-SiO 2 The diameter of organic-inorganic hybrid core-shell particles is 40-100nm, and the shell...

Embodiment 2

[0031] Add 26g of diethylenetriamine to a 250mL three-necked flask, place it in an ice-water bath, add methyl acrylate-methanol solution (26g of methyl acrylate dissolved in 50mL of methanol) dropwise, react for 24 hours after the dropwise addition, add 1g SiO 2Nanoparticles, 0.5g tri-block copolymer P123, 0.5g triamine, stirred gently for 12h, removed methanol at 90°C using a rotary evaporator, then moved to an oil bath and heated to 150°C, in N 2 Stir the reaction for 4 hours under protection, wash the product three times with THF, and centrifuge for 5 minutes (5000rpm) to obtain a light white powder, put it in a vacuum oven and dry at 80°C for 12 hours to obtain HBP-SiO 2 Organic-inorganic hybrid core-shell particles.

[0032] Take 2g of the above HBP-SiO 2 Add organic-inorganic hybrid core-shell particles to a homogeneous mixture of 100g of bisphenol A diglycidyl ether epoxy resin and 30g of diaminodiphenylmethane, and stir evenly. The curing condition is 150°C / 2h+200°C...

Embodiment 3

[0034] Add 27.3g of diethylenetriamine to a 250mL three-necked flask, place it in an ice-water bath, add methyl acrylate-methanol solution (26g of methyl acrylate dissolved in 50mL of methanol) dropwise, and react for 24 hours after the dropwise addition is completed. Add 2g SiO 2 Nanoparticles, 1g triblock copolymer P123, 0.5g triamine, stirred gently for 12h, used a rotary evaporator to remove methanol at 90°C, then moved to an oil bath and heated to 150°C, 2 Stir the reaction for 4 hours under protection, wash the product three times with THF, and centrifuge for 5 minutes (5000rpm) to obtain a light white powder, put it in a vacuum oven and dry at 80°C for 12 hours to obtain HBP-SiO 2 Organic-inorganic hybrid core-shell particles.

[0035] Take 4g of the above HBP-SiO 2 Organic-inorganic hybrid core-shell particles were added to a homogeneous mixture of 100g bisphenol A diglycidyl ether epoxy resin and 35g 3,3'-diethyl-4,4'diaminodiphenylmethane, and stirred evenly. The ...

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Abstract

The invention discloses an organic-inorganic hybrid core-shell particle as well as a preparation method and application thereof. According to the organic-inorganic hybrid core-shell particle, a monodisperse SiO2 nano particle is used as a shell layer; a hyperbranched polymer is used as a core; the hyperbranched polymer is synthesized through a condensation polymerization between AB3 and AB2 type monomers. The preparation method of the organic-inorganic hybrid core-shell particle comprises the following steps of 1), synthesizing an ABx type monomer through a Michael addition reaction, wherein the ABx type monomer is a compound of the AB3 and AB2 type monomers; 2), preparing Pickering emulsion by using the SiO2 nano particle as a stabilizer, the ABx type monomer as a liquid phase and a block polymer and a polyamine as synergetic stabilizers; 3), preparing to obtain the organic-inorganic hybrid core-shell particle through a polymerization technique of the Pickering emulsion and an interfacial self-assembly technique between the liquid phase and the nano particle. The organic-inorganic hybrid core-shell particle can be used for enhancing and toughening epoxy resin; the toughness and the strength of a cured body of the epoxy resin are obviously improved; meanwhile, the tensile property, the elastic modulus and the glass-transition temperature of resin are ameliorated drastically.

Description

technical field [0001] The invention relates to a core-shell particle and its preparation method and application, in particular to an organic-inorganic hybrid core-shell particle, its preparation method and application. Background technique [0002] Epoxy resin has many advantages, such as excellent process performance, mechanical properties and thermal stability, etc., but due to the high crosslinking density of its curing system, the internal stress generated during the curing process is not easy to eliminate, resulting in high brittleness of the cured body, insufficient toughness, and limited The application of epoxy resin in many fields, especially in the field of advanced structural materials. Therefore, the toughening modification of epoxy resin has attracted the attention of many researchers. There are many ways to toughen epoxy resins, but most of the ways tend to reduce other properties, especially strength, while achieving toughness. There are many two-phase inte...

Claims

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Application Information

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IPC IPC(8): C08G83/00C08L63/00C08L87/00
CPCC08G83/005C08L63/00C08L2205/06C08L2207/53C08L87/00
Inventor 黎水平吴其胜王成双诸华军徐风广崔崇刘学然张长森王占红侯海军
Owner YANCHENG INST OF TECH
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