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Core-shell nanoparticle emulsion for waterborne epoxy resin anti-impact modification

A water-based epoxy resin and nano-particle technology, which is applied in the field of water-based epoxy resin tougheners, can solve the problems of small increase in material toughness, large loss of strength and modulus, and uniformly dispersed composite materials, so as to improve the interface effect , reduce loss, good effect of monodispersity

Inactive Publication Date: 2016-02-03
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure rubber or elastomer toughening or rigid particles have some disadvantages in toughening epoxy resin.
For simple rubber or elastomer toughened polymers, although the impact toughness has been greatly improved, it is usually necessary to add 10wt% to 20wt% rubber or elastomer, which often leads to too much loss of strength and modulus of the material; and Using inorganic rigid particles to toughen it, although the strength and modulus of the material will not be lost, but the toughness of the material is not greatly improved, and it is not easy to disperse uniformly in the polymer, so it is impossible to obtain a composite material with uniform dispersion of inorganic particles, especially For nano-sized inorganic filler filled epoxy resin systems, due to the high surface energy of the particles, it is easy to aggregate and cause defects in the material

Method used

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  • Core-shell nanoparticle emulsion for waterborne epoxy resin anti-impact modification
  • Core-shell nanoparticle emulsion for waterborne epoxy resin anti-impact modification
  • Core-shell nanoparticle emulsion for waterborne epoxy resin anti-impact modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]A. Measure 45 parts of ethanol, 25 parts of deionized water and 10 parts of ammonia water into a reactor with a magnetic stirring device and stir for 10 minutes at a speed of 300 rpm, then increase the speed to 1000 rpm, and measure Mix 15 parts of ethanol and 4.5 parts of tetraethyl orthosilicate evenly, and then quickly drop the mixed solution into the reactor. After the color of the mixed solution in the reactor changes from transparent to milky white, reduce the rotating speed to 300 rpm, keep React at this speed for 4 hours; continue to stir and adjust the temperature to 40-50°C, then add 2 parts of silane coupling agent to the system, keep stirring at the temperature for 24 hours, and then put the dispersion in a 50°C blast drying oven to dry to powder state, and then dried in a vacuum oven at 80°C for 24 hours, then centrifuged and washed with ethanol for 3 to 4 times, and finally dried to obtain modified hydrophobic nano-silica particles.

[0047] product testing...

Embodiment 2

[0056] A. Measure 45 parts of ethanol, 30 parts of deionized water and 10 parts of ammonia water into a reactor with a magnetic stirring device and stir at a speed of 300 rpm for 10 minutes, then increase the speed to 1000 rpm, and measure Mix 15 parts of ethanol and 3 parts of tetraethyl orthosilicate evenly, and then quickly drop the mixed solution into the reactor. After the color of the mixed solution in the reactor changes from transparent to milky white, reduce the rotating speed to 300 rpm, keep React at this speed for 4 hours; continue to stir and adjust the temperature to 40-50°C, then add 2 parts of silane coupling agent to the system, keep stirring at the temperature for 24 hours, and then put the dispersion in a 50°C blast drying oven to dry to powder state, and then dried in a vacuum oven at 80°C for 24 hours, then centrifuged and washed with ethanol for 3 to 4 times, and finally dried to obtain modified hydrophobic nano-silica particles;

[0057] B. Add 400 parts...

Embodiment 3

[0059] A. Measure 45 parts of ethanol, 30 parts of deionized water and 10 parts of ammonia water into a reactor with a magnetic stirring device and stir at a speed of 300 rpm for 10 minutes, then increase the speed to 1000 rpm, and measure Mix 15 parts of ethanol and 3 parts of tetraethyl orthosilicate evenly, and then quickly drop the mixed solution into the reactor. After the color of the mixed solution in the reactor changes from transparent to milky white, reduce the rotating speed to 300 rpm, keep React at this speed for 4 hours; continue to stir and adjust the temperature to 40-50°C, then add 5 parts of silane coupling agent to the system, keep stirring at the temperature for 24 hours, and then put the dispersion in a 50°C blast drying oven to dry to powder state, and then dried in a vacuum oven at 80°C for 24 hours, then centrifuged and washed with ethanol for 3 to 4 times, and finally dried to obtain modified hydrophobic nano-silica particles;

[0060] B. Add 500 parts...

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Abstract

The invention discloses core-shell nanoparticle emulsion for waterborne epoxy resin anti-impact modification. The core-shell nanoparticle emulsion comprises core-shell structure nanometer particles, wherein the core-shell structure nanometer particles use silicon dioxide as inner cores, and polymers coat the surfaces of the nanometer particles. The core-shell nanoparticle emulsion for waterborne epoxy resin anti-impact modification has the advantage that the epoxy resin toughness can be greatly improved on the premise of not reducing the strength and the modulus of toughening materials.

Description

technical field [0001] The invention belongs to the field of water-based epoxy resin toughening agents, in particular to a core-shell nanoparticle emulsion for water-based epoxy resin impact modification. Background technique [0002] Epoxy resin is a three-dimensional network thermosetting polymer and a very brittle material. Its toughening modification is an important topic in basic research and application development in the field of polymer science and materials, and has always received extensive attention. . But pure rubber or elastomer toughening or rigid particles have some disadvantages in toughening epoxy resin. For simple rubber or elastomer toughened polymers, although the impact toughness has been greatly improved, it is usually necessary to add 10wt% to 20wt% rubber or elastomer, which often leads to too much loss of strength and modulus of the material; and Using inorganic rigid particles to toughen it, although the strength and modulus of the material will n...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/18C08F220/32C08F220/14C08L63/00C08K9/10C08K9/06C08K3/36
Inventor 任小明蒋涛施德安李琴张群朝张刚申王国成江莉莉赵辉江海邹航张晶
Owner HUBEI UNIV