Unlock instant, AI-driven research and patent intelligence for your innovation.

Epoxy resin composite material and preparation method thereof

A technology of epoxy resin and composite materials, applied in the direction of fibrous fillers, dyed polymer organic compounds, etc., can solve the problems of liquid leakage, reduction of mechanical and mechanical properties of structural materials, generation of holes, etc., and achieve the effect of low thermal expansion coefficient

Inactive Publication Date: 2014-01-22
HENAN UNIV OF SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such structural defects (such as fiber / matrix interface debonding, generation of voids, and delamination) will lead to the reduction of mechanical properties of structural materials and may eventually lead to leakage of liquids.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Epoxy resin composite material and preparation method thereof
  • Epoxy resin composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The epoxy resin composite material of this embodiment is mainly formed by mixing and curing the following raw materials in parts by weight: 75 parts of bisphenol A glycidyl ether type epoxy resin, 0.1 part of carbon filler, and 25 parts of curing agent; The agent is surface-modified graphene oxide whose surface is connected with toluene diisocyanate and polyethylene oxide glycol oligomer. The preparation method of epoxy resin composite material of the present invention comprises the following steps:

[0029] (1) Add 4 g of polyethylene oxide glycol with a molecular weight of 400 dropwise to 3.65 g of toluene diisocyanate (according to the molar ratio of 1:2.1) at 60 ° C for 4 hours to prepare isocyanate-terminated polyepoxide Ethylene glycol oligomers;

[0030] (2) At 80° C., 1.0 g of graphene oxide (prepared by hummers method) was added to 15.0 g of the oligomer of step 1), and then 0.01 g of dibutyltin dilaurate catalyst was added and stirred for 12 h, During the re...

Embodiment 2

[0035] The epoxy resin composite material of this embodiment is mainly formed by mixing and curing the following raw materials in parts by weight: 80 parts of bisphenol A glycidyl ether type epoxy resin, 1 part of carbon filler, and 20 parts of curing agent; The agent is a surface-modified carbon nanotube whose surface is connected with diphenylmethane diisocyanate and polyoxypropylene diol oligomer. The preparation method of epoxy resin composite material of the present invention comprises the following steps:

[0036] (1) Add 6 g of polyoxypropylene diol with a molecular weight of 600 dropwise to 11.25 g of diphenylmethane diisocyanate (according to the molar ratio of 1:4.5) at 70 ° C for 3 hours to prepare the isocyanate group-terminated poly Propylene oxide diol type oligomer;

[0037] (2) At 70°C, add 1.0 g of carbon dioxide nanotubes (commercially available) to 15.0 g of isocyanate-terminated polyoxypropylene diol oligomers, and then add 0.03 g of stannous octoate catal...

Embodiment 3

[0042] The epoxy resin composite material of this embodiment is mainly formed by mixing and curing the following raw materials in parts by weight: 70 parts of bisphenol A glycidyl ether type epoxy resin, 5 parts of carbon filler, and 25 parts of curing agent; The agent is surface modified carbon black with isophorone diisocyanate and polytetrahydrofuran diol oligomer connected on the surface. The preparation method of epoxy resin composite material of the present invention comprises the following steps:

[0043] (1) Add 8 g of polytetrahydrofuran diol with a molecular weight of 800 dropwise to 8.33 g of isophorone diisocyanate (according to the molar ratio of 1:3.75) at 80 ° C for 2 hours to prepare isocyanate-terminated polytetrahydrofuran Diol type oligomer;

[0044] (2) At 90°C, add 1.0 g of carbon black to 15.0 g of isocyanate-terminated polytetrahydrofuran diol-type oligomers, then add 0.01 g of dodecyl dibutyltin sulfide catalyst and stir for 9 h , nitrogen protection ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an epoxy resin composite material, which is mainly formed by mixing and curing the following raw materials in parts by weight: 70-82 parts of bisphenol A diglycidyl ether, 0.1-5 parts of carbon filler and 15-25 parts of curing agent, wherein the carbon filler is a surface-modified carbon particle material of which the surface is connected with oligomer of diisocyanate and polyether glycol or polyester glycol. The surface-modified carbon particle material is filled in the epoxy resin composite material for compounding, the surface of the surface-modified carbon particle material contains a large number of reactive isocyanate groups which can be reacted with hydroxyls on side chains of the bisphenol A diglycidyl ether to generate a covalent bond structure, and the interface effect between the surface-modified carbon particle and an epoxy resin matrix is enhanced, so that the composite material has a lower coefficient of thermal expansion at a glass transition temperature, and the coefficient of thermal expansion is reduced from 7.57*10<-5> DEG C<-1> to (3.45-6.52)*10<-5> DEG C<-1>.

Description

technical field [0001] The invention relates to an epoxy resin composite material, especially an epoxy resin composite material with a low thermal expansion coefficient at the glass transition temperature, and also relates to a preparation method of the composite material. Background technique [0002] The next generation of space missions emphasizes cutting the cost of launching payloads into orbit. The solution to this goal is to design and develop a reusable launch vehicle and reduce the cost of launching a payload to orbit from $10,000 per pound to $1,000 per pound. Weight is the most important variable in the overall design of a reusable launch vehicle. Reducing the weight of the structure will reduce the fuel load, reduce costs, and increase payload. The main contributor to the launch mass of a launch vehicle is the cryogenic propellant tank, which is an important structural component of the launch vehicle. Propellant tank mass can be reduced by employing advanced m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08K9/04C08K3/04C09C1/44C09C3/10
Inventor 赫玉欣冯书晓陆昶刘红宇刘虎潘炳力
Owner HENAN UNIV OF SCI & TECH