阅读说明：本技术 石墨烯高导热不饱和聚酯树脂模塑复合材料 (Graphene high-thermal-conductivity unsaturated polyester resin molding composite material ) 是由 甘秋洋 陈亦奇 于 2020-07-23 设计创作，主要内容包括：本发明提供了一种石墨烯高导热不饱和聚酯树脂团状模塑复合材料,由下列重量份的原料组成：不饱和聚酯树脂20~30份、低收缩剂4~8份、固化剂0.1~1.5份、离型剂0.8~3.5份、染色浆料1.5~5.5份、表面改性石墨烯5~50份、短切玻璃纤维8~18份。本发明利用表面改性的石墨烯和不饱和聚酯树脂形成团状模塑料,具有优异的导热系数、质量轻、耐燃性、高机械强度、耐化学性、耐候性、尺寸安定性等优点,且无污染、成本低,加工便利性高。(The invention provides a graphene high-thermal-conductivity unsaturated polyester resin bulk molding composite material which is prepared from the following raw materials in parts by weight: 20-30 parts of unsaturated polyester resin, 4-8 parts of low shrinkage agent, 0.1-1.5 parts of curing agent, 0.8-3.5 parts of parting agent, 1.5-5.5 parts of dyeing slurry, 5-50 parts of surface modified graphene and 8-18 parts of chopped glass fiber. The bulk molding compound is formed by utilizing the surface-modified graphene and the unsaturated polyester resin, has the advantages of excellent heat conductivity coefficient, light weight, flame resistance, high mechanical strength, chemical resistance, weather resistance, size stability and the like, and is free from pollution, low in cost and high in processing convenience.)

1. The bulk molding composite material of the graphene high-thermal-conductivity unsaturated polyester resin is characterized by comprising the following raw materials in parts by weight: 20-30 parts of unsaturated polyester resin, 4-8 parts of low shrinkage agent, 0.1-1.5 parts of curing agent, 0.8-3.5 parts of parting agent, 1.5-5.5 parts of dyeing slurry, 5-50 parts of surface modified graphene and 8-18 parts of chopped glass fiber.

2. The composite material according to claim 1, wherein the surface modified graphene is one or more selected from graphene oxide and graphene oxide, and the average thickness of the surface modified graphene is between 5 and 150 nm.

3. The composite material according to claim 2, wherein the surface-modified graphene is prepared by the following method:

and carrying out high-speed rotary cutting on the graphene, adding an atomized silane coupling agent for modification, and drying to obtain the surface modified graphene.

4. The composite material according to claim 1, wherein the unsaturated polyester resin is one or more of ortho-benzene type resin, meta-benzene type resin and vinyl resin.

5. The composite material of claim 1, wherein the low profile agent is selected from one or more of styrene monomer, methyl methacrylate monomer, and acrylate monomer.

6. The composite material of claim 1, wherein the initiator accelerator is selected from one or more of benzoyl peroxide tert-butyl ester, tert-butyl peroxy-2-ethylhexanoate, triallyl isocyanurate, and dicumyl peroxide.

7. The composite material of claim 1, wherein the release agent is zinc stearate.

8. The composite material of claim 1, wherein the coupling agent is KH-560 or KH-570.

9. The composite material of claim 1, wherein the chopped glass fiber is a chopped glass fiber with a length of 3-8mm, and the dyeing slurry is a special color paste for unsaturated polyester resin.

10. The composite material according to claim 1, characterized in that it is prepared as follows:

mixing unsaturated polyester resin, a low shrinkage agent, surface modified graphene, a curing agent, an initiation accelerator, a release agent, chopped glass fiber and dyeing slurry, and performing cold extrusion, discharging and packaging.

Technical Field

The invention relates to a molding composite material, in particular to a graphene high-thermal-conductivity unsaturated polyester resin bulk molding composite material.

Background

The BMC (bulk molding compounds) unsaturated polyester resin bulk molding compound is compounded by raw and auxiliary materials such as special thermosetting unsaturated polyester resin, polystyrene low shrinkage agent, inorganic mineral filler, chopped glass fiber, colorant and the like. The unsaturated polyester resin bulk molding compound has various excellent performances such as electrical insulation, heat resistance, flame resistance, high mechanical strength, chemical resistance, weather resistance, size stability and the like.

With the rapid development of scientific technology, the electronic and electric appliances can efficiently conduct and dissipate heat, which is a crucial problem in the field of heat management. Along with the continuous improvement of integration and precision of electronic components of electrical devices such as computers, communication equipment, photoelectricity and the like, the continuous improvement of heat productivity of electronic devices in unit area leads the heat generated by the system to increase suddenly. If the heat cannot be effectively managed and conducted, the normal operation of the electronic components is affected, and the reliability is greatly reduced.

The metal material has excellent mechanical property and heat-conducting property. The method is widely applied to the field of thermal management of electronic and electric appliances. However, metals have problems of easy corrosion, large mass, complicated workability, processing contamination, etc., thus limiting the expanded application of metals in the field of thermal management.

Disclosure of Invention

The invention provides a graphene high-thermal-conductivity unsaturated polyester resin bulk molding composite material, which is used for improving a heat dissipation function and realizing a good heat dissipation effect on an electronic element.

The invention provides a graphene high-thermal-conductivity unsaturated polyester resin bulk molding composite material which is prepared from the following raw materials in parts by weight: 20-30 parts of unsaturated polyester resin, 4-8 parts of low shrinkage agent, 0.1-1.5 parts of curing agent, 0.8-3.5 parts of parting agent, 1.5-5.5 parts of dyeing slurry, 5-50 parts of surface modified graphene and 8-18 parts of chopped glass fiber.

Further, the surface modified graphene is selected from one or more of graphene oxide and graphene oxide, and the average thickness of the surface modified graphene is between 5 and 150 nm.

Further, the preparation method of the surface modified graphene comprises the following steps:

and carrying out high-speed rotary cutting on the graphene, adding an atomized silane coupling agent for modification, and drying to obtain the surface modified graphene.

Further, the unsaturated polyester resin is one or more of o-benzene resin, m-benzene resin and vinyl resin.

Further, the low shrinkage agent is selected from one or more of styrene monomer, methyl methacrylate monomer and acrylate monomer.

Further, the initiator accelerator is selected from one or more of benzoyl peroxide tert-butyl ester, peroxy-2-ethyl hexanoate tert-butyl ester, triallyl isocyanurate and dicumyl peroxide.

Further, the release agent is zinc stearate.

Further, the coupling agent is KH-560 or KH-570.

Furthermore, the chopped glass fiber is a chopped glass fiber with the length of 3-8mm, and the dyeing slurry is special color paste for unsaturated polyester resin.

Further, the preparation method of the composite material comprises the following steps:

mixing unsaturated polyester resin, a low shrinkage agent, surface modified graphene, a curing agent, an initiation accelerator, a release agent, chopped glass fiber and dyeing slurry, and performing cold extrusion, discharging and packaging.

Compared with the prior art, the bulk molding compound formed by the surface-modified graphene and the unsaturated polyester resin has the advantages of excellent heat conductivity coefficient, light weight, flame resistance, high mechanical strength, chemical resistance, weather resistance, size stability and the like, and is pollution-free, low in cost and high in processing convenience.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.

The preparation method of the surface modified graphene in the embodiment of the invention comprises the following steps:

1: drying the graphene in a vacuum drying oven at a temperature of 120 ℃/4 hr to remove the surface moisture of the graphene, and taking out for later use to obtain dry graphene;

2. preparing 20 parts of silane coupling agent, 76 parts of absolute ethyl alcohol and 4 parts of deionized water, putting the mixture into a beaker, mechanically stirring the mixture at 680 rpm/5 min until the solution is clear, taking the solution out for later use, and hydrolyzing the grafting agent;

3. placing the graphene in a high-speed rotary cutter to spin the graphene at the rotating speed of 2200rpm, and spraying a hydrolyzed silane coupling agent into the rotary cutter in a spraying manner to perform surface modification so as to obtain a modified graphene semi-finished product;

4. taking out the modified graphene, placing the modified graphene in a vacuum drying oven, and drying at the temperature of 120 ℃/8 hr to remove the alcohol water solution on the surface of the graphene, thus obtaining the finished product of the surface modified graphene raw material.

The preparation method of the composite material provided by the embodiment of the invention comprises the following steps:

unsaturated polyester resin, low shrinkage agent, surface modified graphene, curing agent, initiation accelerator, release agent, chopped glass fiber and dyeing slurry are placed into a SIGMA type kneader to be kneaded, and then are subjected to cold extrusion, discharging and packaging, so that the high-thermal-conductivity unsaturated polyester resin bulk molding composite material with excellent performance is obtained.