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Epoxy composite material and preparation method thereof

A composite material and epoxy technology, applied in the field of preparation of epoxy composite materials, can solve problems such as easy generation of bubbles, complexity, and poor rheological properties of the system, so as to simplify the production process, reduce production costs, and improve breakdown strength Effect

Inactive Publication Date: 2013-10-30
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there may still be some problems in this study: such as the preparation and purification steps of nano-silver are complicated, and the stability of nano-silver is not good; in addition, the amount of nano-silver particles added is still relatively high - 10% mass fraction of nano-silver is required. Silver can maximize the breakdown voltage of epoxy materials
For epoxy systems, the addition of nanofillers will bring about a significant viscosity-increasing effect, which will deteriorate the rheological properties of the system, and easily generate bubbles during pouring, forming defects, and ultimately destroying the insulation properties of the material

Method used

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  • Epoxy composite material and preparation method thereof
  • Epoxy composite material and preparation method thereof

Examples

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preparation example Construction

[0028] The invention provides a kind of preparation method of epoxy composite material, this method comprises:

[0029](1) stirring and mixing the conductive nanofiller with a part of epoxy resin, and grinding the mixture obtained after stirring and mixing to obtain a masterbatch;

[0030] (2) Mix the masterbatch obtained in step (1) with another part of epoxy resin and curing agent at 50-80°C, and then remove air bubbles;

[0031] (3) solidifying and molding the material obtained after removing air bubbles;

[0032] Wherein, the total consumption of epoxy resin in step (1) and (2) is 100:0.001-0.5 with the weight ratio of conductive nanofiller in step (1), the consumption of epoxy resin in step (1) and step (2 The weight ratio of epoxy resin in ) is 1:0.1-100, and the stirring and mixing conditions in step (1) make the kinematic viscosity of the mixture obtained after stirring and mixing at 60° C. be 5-18 Pa·s.

[0033] In step (1), stirring and mixing the conductive nanofi...

Embodiment 1

[0054] This example is used to illustrate the epoxy composite material of the present invention and its preparation method.

[0055] With the bisphenol A epoxy resin of 30 weight parts (Huntsman company, model is Epoxy value is about 0.52mol / 100g, the same below) is added into high-speed stirrer (Germany VMA-Getzmann company, model DISPERMAT AE), then the reduced graphene oxide of 0.01 weight part (purchased from Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences, Its relevant parameters such as figure 2 shown) was added into two batches evenly, stirred and mixed for 1.5 hours at a rotating speed of 3000 rpm to obtain a mixture with a dynamic viscosity of 10 Pa·s at 60°C, and then place the obtained mixture in an airtight container at room temperature for 20 Hours, after which the obtained material was ground with a three-roll mill (model EXAKT 80E), operating in two modes successively. Among them, in the spacing mode, the ratio of the front and rear roller s...

Embodiment 2-6

[0063] This example is used to illustrate the epoxy composite material of the present invention and its preparation method.

[0064] Epoxy composites were prepared according to the method of Example 1, except that the amount of reduced graphene oxide was added as shown in Table 1 below, so that epoxy composite films with a thickness of about 200 microns were correspondingly prepared.

[0065] Table 1

[0066]

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Abstract

The invention provides an epoxy composite material and a preparation method thereof. The method comprises the following steps: (1) mixing trace of conductive nano fillers with one part of epoxy resin; grinding a mixture obtained by agitating and mixing to obtain a master batch; (2) mixing the master batch obtained in the step (1) with the other part of the epoxy resin and a curing agent; then removing air bubbles; (3) carrying out curing and molding on materials obtained by removing the air bubbles, wherein the conditions of agitating and mixing in the step (1) enable the dynamic viscosity of the mixture obtained by agitating and mixing to be 5-18Pa*s at 60 DEG C. An epoxy composite material thin film prepared by using the method disclosed by the invention has high disruptive strength and a relatively good dielectric property.

Description

technical field [0001] The invention relates to a preparation method of epoxy composite material and epoxy composite material prepared by the method. Background technique [0002] Electrical insulating materials (also known as dielectrics) have high breakdown strength and resistivity, and are usually used to isolate objects with different potentials and play the role of electrical insulation and load bearing. Electrical insulation materials (hereinafter referred to as "insulation materials") are widely used in power equipment and electronic devices, and are the guarantee for their safe operation. Having excellent electrical breakdown performance is one of the most basic requirements for electrical insulating materials. [0003] Due to excellent physical and chemical properties and good processing technology, various polymers have been applied to insulating materials, and epoxy resin is one of the most important varieties. Epoxy resin and its composite materials can be used...

Claims

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Application Information

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IPC IPC(8): C08L63/02C08L63/04C08K3/04C08K3/08C08J3/22
Inventor 彭金平张晖张忠曾志辉
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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