Bubble dispersion method for preparing graphene/epoxy resin composite materials

An epoxy resin and composite material technology, applied in the field of nanocomposite materials, can solve the problems of adverse effects on the mechanical properties of composite materials, affecting the effective range of ultrasonic waves, difficult to adapt to large-scale production needs, etc. Reasonable way and low cost effect

Inactive Publication Date: 2015-11-18
SHENYANG JIANZHU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dispersant method is to use a dispersant such as a surfactant to form an oriented arrangement on the surface of graphene, reduce the surface tension of graphene in the matrix, and reduce the curling deformation of graphene, but it may have an adverse effect on the mechanical properties of the composite material; ultrasonic dispersion The principle is to use mechanical action to generate fine bubbles, and use the high temperature and high pressure of the cavitation formed when the bubbles are generated-ruptured to promote the uniform dispersion of graphene in the matrix. The effect is obvious in the polar liquid phase, but its effect is greatly limited in the high-viscosity, weak-polar or non-polar matrix phase, and the ultrasonic wave is absorbed and buffered by the high-viscosity matrix, which affects the effective range of the ultrasonic wave. Difficult to adapt to the needs of industrialized mass production

Method used

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  • Bubble dispersion method for preparing graphene/epoxy resin composite materials
  • Bubble dispersion method for preparing graphene/epoxy resin composite materials
  • Bubble dispersion method for preparing graphene/epoxy resin composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 100 parts of epoxy resin and 0.15 parts of graphene, that is, the mass ratio of graphene to epoxy resin is 0.15%, so that graphene is premixed in epoxy resin. Set the temperature of the water bath to 55°C. After the temperature is constant, open the valve of the compressed air cylinder, adjust the pressure reducing valve and the flow meter to keep the flow rate at 400mL / min / gas nozzle (the number of gas nozzles in this embodiment is 15) , each air nozzle has a flow rate of 400mL per minute, arranged in a honeycomb shape on the bottom of the sample pool, with a distance of 3cm), pour the prepared graphene / epoxy resin mixture into the sample pool of the bubble dispersion device, to avoid local uneven dispersion , carry out bubbling for 6h; until bubbling for 5 hours and 50 minutes, take 10 parts of triethylenetetramine (10% of the mass of epoxy resin) and add to the sample pool, continue to bubbling to 4h; Put it in a vacuum drying oven at 80°C, perform vacuum defoa...

Embodiment 2

[0037] Weigh 100 parts of epoxy resin and 0.45 parts of graphene, that is, the mass ratio of graphene to epoxy resin is 0.45%, so that graphene is premixed in epoxy resin. Set the temperature of the water bath to 80°C. After the temperature is constant, open the valve of the compressed air cylinder, adjust the pressure reducing valve and the flow meter to keep the flow rate at 1000mL / min / gas nozzle (the number of gas nozzles in this embodiment is 20) , arranged in a honeycomb shape on the bottom surface of the sample pool, with a distance of 5 cm), pour the prepared graphene / epoxy resin mixture into the sample pool of the bubble dispersion device, to avoid local uneven dispersion, bubbling for 2 hours; until bubbling for 1 hour 1 hour and 50 minutes, weigh 10 parts of triethylenetetramine (10% of the mass of the epoxy resin) and add it to the sample cell, and continue to aerate for 2 hours; After defoaming treatment for 1 hour, take it out, solidify and mold at room temperatur...

Embodiment 3

[0039] Weigh 100 parts of epoxy resin and 1.5 parts of graphene, that is, the mass ratio of graphene to epoxy resin is 1.50%, so that graphene is premixed in epoxy resin. Set the temperature of the water bath to 55°C. After the temperature is constant, open the valve of the compressed air cylinder, adjust the pressure reducing valve and the flow meter to keep the flow rate at 200mL / min / gas nozzle (the number of gas nozzles in this embodiment is 30) , arranged in a honeycomb shape on the bottom surface of the sample pool, with a distance of 4cm), pour the prepared graphene / epoxy resin mixture into the sample pool of the bubble dispersing device, avoid local uneven dispersion, and bubble for 12 hours; until bubble 11 1 hour and 50 minutes, weigh 10 parts of triethylenetetramine (10% of the mass of epoxy resin) and add it to the sample cell, and continue to blow air for 12 hours; After 2 hours of defoaming treatment, take it out, solidify and mold at room temperature for 24 hours...

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Abstract

The invention belongs to the technical field of nanocomposite, and particularly relates to a bubble dispersion method for preparing graphene / epoxy resin composite materials. The method includes the steps that gas of proper pressure and flow is guided to a premixed material of graphene / epoxy resin, clustering of graphene is scattered through graphene particles, generated in the bubble generation and floating processes, in a volume expansion tensioning resin base body, and stretching of the graphene particles is promoted. Under the situation that dispersing agents are not used, the graphene is evenly dispersed in epoxy resin through relative motion of bubble wall films in the bubble generation, growing and breaking processes by means of a physical method, the dispersion process is simple in technology and convenient to control, the dispersion effect is good, popularization of the technology is achieved easily, and the graphene / epoxy resin composite materials excellent in performance can be obtained. The method is less in energy consumption, low in cost and free of pollution, factory mass production is achieved easily, and chemical properties of the obtained composite materials is obviously promoted.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, in particular to a method for dispersing bubbles used in the preparation of graphene / epoxy resin composite materials. Background technique [0002] Epoxy resin is one of the most widely used polymer materials, with many excellent physical, chemical and mechanical properties, such as: good dimensional stability, high hardness, good insulation performance, strong adhesion, stable chemical properties, certain heat resistance, etc. In recent years, the output and demand of epoxy resin have been increasing, especially in high-end technical fields such as aerospace, electronic appliances, machinery manufacturing and military industry. But on the other hand, the high brittleness and weak impact resistance of epoxy resin limit the further application and popularization of epoxy resin. Therefore, the research on the strengthening and toughening of epoxy resin has become a hot spot in the ...

Claims

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Application Information

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IPC IPC(8): C08J3/20C08L63/00C08K3/04
Inventor 佟钰田鑫张君男曾尤
Owner SHENYANG JIANZHU UNIVERSITY
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