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A kind of fiber-reinforced rubber-elastomer composite material and preparation method thereof

A technology of rubber elastomers and composite materials, applied in the field of composite materials, can solve the problems of limited material compression resistance, high viscosity, weak interface bonding strength, etc., and achieve the effect of improving compression resistance.

Active Publication Date: 2021-12-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high viscosity of rubber, the fiber is severely interrupted during processing, and the interface bonding strength between rubber and fiber is weak, which severely limits the improvement of the compression resistance of the material, especially for low surface energy silicone rubber.

Method used

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  • A kind of fiber-reinforced rubber-elastomer composite material and preparation method thereof
  • A kind of fiber-reinforced rubber-elastomer composite material and preparation method thereof
  • A kind of fiber-reinforced rubber-elastomer composite material and preparation method thereof

Examples

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preparation example Construction

[0046] The preparation method of the thermosetting solder comprises the following steps: mixing a thermosetting resin, a curing agent and an accelerator, and mixing them uniformly with a stirrer to obtain the thermosetting solder. The viscosity of the thermosetting solder can be adjusted by means of constant temperature heating (less than 90° C.). The longer the constant temperature time is, the greater the viscosity will be (after the constant temperature time is over, the temperature will be cooled by an ice-water bath immediately).

[0047] The rubber matrix is ​​a vulcanized thermosetting rubber, and a vulcanizing agent needs to be added during vulcanization. The mass ratio of the vulcanizing agent to the thermosetting rubber is 0.1-5%, preferably 1%, 3%, or 5%. In addition, the rubber matrix may be liquid or solid, with a viscosity of 0.1-100000 Pa.s, preferably 1-2000 Pa.s.

[0048] Described thermosetting rubber is conventional rubber, comprises solid rubber and liquid ...

Embodiment 1

[0062] Vinyl silicone rubber SR-1 (viscosity of 50rad / s at room temperature is 1370Pa.s), vulcanizing agent dicumyl peroxide (content is 1% of the quality of silicone rubber) and glass fiber GF-KH560 (surface ring Oxygen group) into the internal mixer, blending at room temperature for 1min, adding epoxy resin EP (EP consists of E-51 resin (brand YD128) and curing agent methyl hexahydrophthalic anhydride, accelerator 2,4,6 -Tris(dimethylaminomethyl)phenol composition, the mass ratio of E-51 resin, curing agent methyl hexahydrophthalic anhydride, accelerator 2,4,6-tris(dimethylaminomethyl)phenol is 100: 70:5.), after continuing to blend for 10 minutes, take out the sample. Firstly, it is cured at a temperature of 100°C for 30 minutes; then it is vulcanized at a temperature of 150°C for 30 minutes, and two-step compression molding is performed to obtain a fiber-reinforced rubber elastomer composite material. The mass ratio of SR-1, epoxy resin EP and GF-KH560 is 80 / 20 / 30. The v...

Embodiment 2

[0064] The mass ratio of SR-1, EP and GF-KH560 is 80 / 20 / 20, and others are the same as in Example 1. The maximum compressive strength of the obtained fiber-reinforced rubber-elastomer composite is 1.95MPa, and the corresponding compressive strain is 9.6%, specifically The results are shown in Table 1.

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Abstract

The invention discloses a fiber-reinforced rubber elastic body composite material with good compression resistance, which includes a rubber matrix, fibers, and a thermosetting welding agent, and the thermosetting welding agent can promote spontaneous welding of fibers randomly dispersed in the rubber matrix during processing In essence, a three-dimensional network skeleton structure composed of thermosetting solder and fibers independent of the rubber matrix is ​​formed; the thermosetting solder is a variety of thermosetting resins, which are flowing liquids before curing at room temperature and high-strength after curing. It is a solid; it is made of thermosetting resin, curing agent and accelerator with a mass ratio of 100:(50-100):(0-10). The present invention forms a self-welded fiber skeleton structure in the rubber matrix by adding thermosetting solder, which supports the rubber matrix, greatly improves the compression resistance of the rubber matrix, and is beneficial to broaden the rubber under pressure-resistant conditions. application.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a fiber-reinforced rubber elastic body composite material and a preparation method thereof. Background technique [0002] As we all know, rubber elastomer, as a highly elastic material, is widely used in aerospace, transportation, medical equipment and other fields. However, with the continuous improvement of structure-function integration requirements, higher requirements are put forward for the strength and compression resistance of rubber. For example, rubber is used in underwater sound-absorbing coatings due to its characteristic acoustic impedance close to that of water and its excellent sound-absorbing performance. However, the water pressure of 5 MPa will deform the rubber, thereby greatly reducing its sound-absorbing performance. Therefore, how to improve the compression resistance of rubber is the key to broaden the application range of functiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L23/22C08L9/06C08L63/02C08L83/06C08K9/06C08K7/14C08K5/14C08J5/08
CPCC08J5/08C08J2309/06C08J2323/22C08J2383/07C08J2463/02C08J2483/06C08K5/14C08K7/14C08K9/06
Inventor 吴国章倪敏杰林宇
Owner EAST CHINA UNIV OF SCI & TECH
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