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Silicone rubber foam material with hybrid microporous structure, and workpiece and preparation method thereof

A technology of microporous structure and foam material, which is applied in the microporous structure design of silicon foam material and the field of porous materials, can solve the problems of high initial elastic modulus, too fast rise of post stress, and slow stress growth, etc., and achieve good foam material performance Effect

Inactive Publication Date: 2018-02-23
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the silicon foam material with ST-type microporous structure shows pillar compression deformation under uniaxial compression state, resulting in a high initial elastic modulus, and then the stress rises too fast, while the silicon foam material with FCT-type microporous structure shows The bending deformation characteristics of the pillars are shown, resulting in a low initial elastic modulus, but the stress increases slowly

Method used

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  • Silicone rubber foam material with hybrid microporous structure, and workpiece and preparation method thereof
  • Silicone rubber foam material with hybrid microporous structure, and workpiece and preparation method thereof
  • Silicone rubber foam material with hybrid microporous structure, and workpiece and preparation method thereof

Examples

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Effect test

Embodiment 1

[0042] like Figure 8-10 As shown, a silicone rubber foam material with two basic structural parts 1 has eight layers from top to bottom, of which the first to fourth layers are one basic structural part 1, and the fifth to eighth layers are another basic structural part 1. Each basic structural part 1 includes four unit layers 2, of which there are two wide-pitch unit layers and two narrow-pitch unit layers. From top to bottom, the first, second, fifth, and sixth floors are narrow-pitch unit layers , the third, fourth, seventh, and eighth layers are wide-pitch unit layers, and the arrangement spacing (A2, B2) of the silicone rubber strips in the narrow-pitch unit layer is half of the arrangement spacing (A1, B1) of the silicone rubber strips in the wide-pitch unit layer. A1=0.9mm, B1=0.9mm, A2=0.45mm, B2=0.45mm. The diameter of the silicone rubber strip 3 is 0.21mm, and the interlayer height of the unit layer 1 is 0.2mm. At this time, the linear elastic area of ​​the materia...

Embodiment 2

[0044] The difference between this embodiment and Embodiment 1 is that A1=0.8mm, B1=0.8mm, A2=0.4mm, B2=0.4mm, and the diameter of the silicone rubber strip 3 is 0.21mm. At this time, the material under uniaxial compression The linear elastic area is 29%, and the elastic modulus is 0.25Mpa.

Embodiment 3

[0046] The difference between this embodiment and Embodiment 1 is that A1=0.7mm, B1=0.7mm, A2=0.35mm, B2=0.35mm, and the diameter of the silicone rubber strip 3 is 0.21mm. At this time, the material under uniaxial compression The linear elastic area is 27%, and the elastic modulus is 0.32Mpa.

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Abstract

The invention discloses a silicone rubber foam material with a hybrid microporous structure, and a workpiece and a preparation method thereof. The silicone rubber foam material comprises at least onebase structural member, wherein each base structural member comprises four unit layers which are mutually stacked up; each unit layer comprises a plurality of silicone rubber strips which are in parallel and equidistant arrangement; the silicone rubber strips of two adjacent unit layers are in mutually-vertical arrangement; two of the four unit layers are widely-spaced unit layers, and other two of the four unit layers are narrowly-spaced unit layers; the arrangement distance of the silicone rubber strips of a narrowly-spaced unit layer is smaller than the arrangement distance of the siliconerubber strips of a widely-spaced unit layer; two narrowly-spaced unit layers are in adjacent arrangement; meanwhile, two widely-spaced unit layers are in adjacent arrangement. According to the invention, through adjustment of the arrangement distances of the silicone rubber strips of the narrowly-spaced unit layers and the widely-spaced unit layers, the silicone rubber foam material has long linear elasticity area and high elasticity modulus, and can meet the practical application requirements of a variety of fields.

Description

technical field [0001] The invention relates to the field of porous materials, in particular to the field of microporous structure design of silicon foam materials, in particular to a silicon rubber foam material with a mixed microporous structure, a product and a preparation method thereof. Background technique [0002] Due to the excellent properties of silicone rubber and the compressibility of foam materials, silicon foam materials are widely used in aerospace, electronic communications, transportation, mechanical engineering and other fields, and are often used as precision components and key components. Packaging, vibration isolation materials. [0003] Traditional silicon foam materials are mainly prepared by physical foaming or chemical foaming technology to form elastic porous structure materials (such as CN 106589959A; CN 104774473A; CN 106589958A; CN106433139A; CN103130454B; CN 101199867B), but random foaming materials have natural Disadvantages, due to the uneve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00C08L83/04C08L83/07C08L83/08B33Y80/00
CPCB33Y80/00C08J9/00C08J2383/04C08J2383/08
Inventor 梅军朱晓伟唐昶宇杨建何周坤
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS