CN102250414A - Plastic-based composite material with electricity conducting and electromagnetic shielding functions and preparation method thereof - Google Patents

Abstract

The invention discloses a plastic-based composite material with electricity conducting and electromagnetic shielding functions. The plastic-based composite material consists of the following raw materials in part by mass: 75 to 90 parts of plastic matrix, 1 to 20 parts of surface modified high-efficiency conductive agent, 1 to 5 parts of compatilizer and 0.5 to 1 part of antioxidant. The product has good conductive property, electromagnetic shielding property and mechanical properties, and can be widely applied to the fields of electronic consumer goods, remote monitoring/communication, military, and field/indoor power supply.

Description

Has plastic base composite material of conduction and electro-magnetic screen function and preparation method thereof

Technical field

The present invention relates to a kind of plastic base composite material and preparation method thereof with conduction and electro-magnetic screen function.

Background technology

Along with the development of electronic industry, electronic products such as various household electrical appliances, office electrical equipment, plant and instrument obtain popularizing widely and using, and also discharge a large amount of electromagnetic radiation when offering convenience to people, are endangering people's health.

For this reason, people constantly seek the matrix material with better capability of electromagnetic shielding, with plastics is that the matrix material with conduction and electro-magnetic screen function of matrix is owing to have less density, lower cost receives the concern of society gradually, people seek the whole bag of tricks plastics are carried out modification, as in plastic substrate, adding conductive metal powder, conductive mica powder or the like obtains the matrix material of corresponding function, yet, because the consistency of conducting particles and plastic substrate, the dispersiveness of conducting particles, and processing conditions or the like problem, the shielding properties of the matrix material that obtains at last, mechanical properties etc. are often not good.

Summary of the invention

The purpose of this invention is to provide a kind of plastic base composite material and preparation method thereof with conduction and electro-magnetic screen function.

The technical solution used in the present invention is:

A kind of plastic base composite material with conduction and electro-magnetic screen function, its raw material by following mass parts is formed: the oxidation inhibitor of the high-effective conductive agent of the surface modification of the plastic substrate of 75-90 part, 1-20 part, the compatilizer of 1-5 part, 0.5-1 part.

Described plastic substrate is a kind of among BOPP, the PET.

Described compatilizer is PP-g-MAH.

Described oxidation inhibitor is at least a in 1010,1135,168.

A kind of preparation method with plastic base composite material of conduction and electro-magnetic screen function is characterized in that: may further comprise the steps:

1) plastic substrate, compatilizer, oxidation inhibitor are mixed;

2) the high-effective conductive agent with resulting material of step 1) and surface modification mixes;

3) with step 2) material that obtains extrudes in forcing machine.

The invention has the beneficial effects as follows: product of the present invention, have excellent conducting performance, capability of electromagnetic shielding and mechanical property, can be widely used in consumer electronics, remote monitoring/communication, military affairs, field/indoor power supply field.

Embodiment

A kind of preparation method with plastic base composite material of conduction and electro-magnetic screen function may further comprise the steps:

1) plastic substrate, compatilizer, oxidation inhibitor were placed the mixing machine mixing 2-3 minute;

2) the resulting material of step 1) was placed the mixing machine mixing 2-3 minute with the high-effective conductive agent of surface modification;

3) with step 2) material that obtains extrudes in parallel dual-screw extruding machine, and the screw slenderness ratio of forcing machine is 1:30-40.

When carrying out Composite Preparation with the prescription among the embodiment, among the embodiment 1-4, the temperature of forcing machine is 180-210 ℃, and among the embodiment 5, the temperature of forcing machine is 270-285 ℃.

PP-g-MAH is self-control (by the preparation of original position fusion-grafting method, technology of preparing is the known technology of this area), and the percentage of grafting that records MAH at last is 2%.

Below in conjunction with specific embodiment prescription of the present invention is described further:

Embodiment 1:

Prescription table 1 composed as follows with plastic base composite material of conduction and electro-magnetic screen function:

Table 1: the prescription with plastic base composite material of conduction and electro-magnetic screen function is formed

Raw material	Mass parts
		BOPP	75
PP-g-MAH	5
		The high-effective conductive agent of surface modification	20
Antioxidant 1010	0.5

Embodiment 2:

Prescription table 2 composed as follows with plastic base composite material of conduction and electro-magnetic screen function:

Table 2: the prescription with plastic base composite material of conduction and electro-magnetic screen function is formed

Raw material	Mass parts
		BOPP	85
PP-g-MAH	3
		The high-effective conductive agent of surface modification	12
Antioxidant 1010	0.5

Embodiment 3:

Prescription table 3 composed as follows with plastic base composite material of conduction and electro-magnetic screen function:

Table 3: the prescription with plastic base composite material of conduction and electro-magnetic screen function is formed

Raw material	Mass parts
		BOPP	90
PP-g-MAH	3
		The high-effective conductive agent of surface modification	7
Antioxidant 1010	0.5

Embodiment 4:

Prescription table 4 composed as follows with plastic base composite material of conduction and electro-magnetic screen function:

Table 4: the prescription with plastic base composite material of conduction and electro-magnetic screen function is formed

Raw material	Mass parts
		BOPP	76
PP-g-MAH	1
		The high-effective conductive agent of surface modification	1
Oxidation inhibitor 168	0.6

Embodiment 5:

Prescription table 5 composed as follows with plastic base composite material of conduction and electro-magnetic screen function:

Table 5: the prescription with plastic base composite material of conduction and electro-magnetic screen function is formed

Raw material	Mass parts
		PET	88
PP-g-MAH	5
		The high-effective conductive agent of surface modification	7
Oxidation inhibitor 1135	0.7

Performance of composites such as following table 6 by embodiment 1-3 preparation:

Table 6: the performance of the plastic base composite material with conduction and electro-magnetic screen function of the present invention's preparation

Performance	Unit	Embodiment 1	Embodiment 2	Embodiment 3
					Melting index	g/10min	16	22	26
Tensile strength	Mpa	38	35	32
					Modulus in flexure	Mpa	2690	2120	1850
The simply supported beam notch shock	KJ/m 2	6.8	9.5	12.3
					Surface resistivity	Ω	＜10	＜10	＜10
Electromagnetic shielding efficiency	dB	＞60	＞60	＞60

Among the present invention, the high-effective conductive agent of surface modification makes by the following method: with Graphene (model: GS-1) place the high-speed mixer mixing to get final product in 2-3 minute with the titanate coupling agent that accounts for Graphene quality 1%.

As can be seen from Table 6, product of the present invention, have excellent conducting performance, capability of electromagnetic shielding and mechanical property, simultaneously, that this matrix material has is durable, the characteristics such as product of light specific gravity, plastic complex construction, can be widely used in consumer electronics, remote monitoring/communication, military affairs, field/indoor power supply field.Meet the strategic plan of nation-building resource-conserving and environment-friendly society fully.

Claims (5)

1. one kind has the conduction and the plastic base composite material of electro-magnetic screen function, and it is characterized in that: its raw material by following mass parts is formed: the oxidation inhibitor of the high-effective conductive agent of the surface modification of the plastic substrate of 75-90 part, 1-20 part, the compatilizer of 1-5 part, 0.5-1 part.

2. a kind of the have conduction and the plastic base composite material of electro-magnetic screen function according to claim 1 is characterized in that: described plastic substrate is a kind of among BOPP, the PET.

3. a kind of plastic base composite material with conduction and electro-magnetic screen function according to claim 1, it is characterized in that: described compatilizer is PP-g-MAH.

4. a kind of the have conduction and the plastic base composite material of electro-magnetic screen function according to claim 1 is characterized in that: described oxidation inhibitor is at least a in 1010,1135,168.

5. the described a kind of preparation method with conduction and plastic base composite material of electro-magnetic screen function of claim 1 is characterized in that: may further comprise the steps:

1) plastic substrate, compatilizer, oxidation inhibitor are mixed;

2) the high-effective conductive agent with resulting material of step 1) and surface modification mixes;

3) with step 2) material that obtains extrudes in forcing machine.