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Preparation method of silicone rubber foam with controllable multi-scale pore structure

A technology of silicone rubber and pore structure, applied in manufacturing, additive processing, liquid material additive processing and other directions, can solve the problems of less involved in rubber foam printing, and achieve low cost, widened control space, and simple process equipment. Effect

Active Publication Date: 2019-09-17
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current reports on the use of 3D printing technology to prepare foam materials mainly focus on porous metals, while the printing of rubber foam is less involved.

Method used

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  • Preparation method of silicone rubber foam with controllable multi-scale pore structure
  • Preparation method of silicone rubber foam with controllable multi-scale pore structure
  • Preparation method of silicone rubber foam with controllable multi-scale pore structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mix 100g of terminal vinyl polydimethylsiloxane with a viscosity of 1500mPa.s, 70g of gas-phase method hydrophobic silica, and 5g of zinc oxide with a stirring device, and then add 120g of micron sodium chloride particles obtained by grinding, 5g Polyethylene glycol with a molecular weight of 1000, 7g hydrogen-containing silicone oil with a hydrogen weight fraction of 7%, and 0.3g platinum-vinylsiloxane complex are mixed uniformly with a stirring device at room temperature; After defoaming treatment, package it in the pressure injection system of a 3D printer (the 3D printer used is the shotmaster 350PC of MUSASHI, and other qualified 3D printers can also be used), install a pressure injection needle with an inner diameter of 0.6mm, and inject the pressure After the system is loaded on the mobile control system of the 3D printer, start the printing pressure and movement program, adjust the printing pressure and movement speed, so that the printing line width is 0.8 times...

Embodiment 2

[0033]Mix 100g of terminal vinylmethylphenyl silicone rubber with a viscosity of 5000mPa.s, 10g of fumed hydrophilic silica, 40g of fumed hydrophobic silica, and 5g of zinc oxide with a stirring device, and then add high-speed stirring to obtain 100g micron urea particles, 10g molecular weight is the polyethylene glycol of 400, 10g hydrogen weight fraction is the hydrogen-containing silicone oil of 4%, 0.8g polyvinyl polysiloxane and 0.2gPt mass fraction are the platinum catalyst of 1%, in Mix evenly with a stirring device in an environment of 10-20°C; after degassing the above rubber materials with a centrifuge, package them in the pressure injection system of the 3D printer, install a pressure injection needle with an inner diameter of 0.25mm, and load the pressure injection system After the mobile control system of the 3D printer, start the printing pressure and movement program, adjust the printing pressure and movement speed, so that the printing line width is 0.95-1.1 tim...

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Abstract

The invention discloses a preparation method of silicone rubber foam with a controllable multi-scale porous structure. The preparation method comprises the following steps that 1, 100 parts of crude silicon rubber, 10-200 parts of micron pore-forming agent, 10-90 parts of reinforcing agent, 0-20 parts of interface modifier, 0.5-15 parts of cross-linking agent, 0.1-5.0 parts of catalyst and 0-5.0 parts of inhibitor are evenly mixed at the ambient temperature of 0-35 DEG C to obtain a printing rubber material; 2, 3D printing is performed to obtain pre-formed silicone rubber foam; 3, shaping is performed; 4, the micron pore-forming agent is removed through dissolution, air drying is performed, and the silicone rubber foam with the controllable multi-scale porous structure is obtained after air-blowing drying. A 3D printing technology id applied to preparation of the silicone rubber foam, digital and precision processing is performed by utilizing 3D printing, meanwhile a high-controllability and pollution-free solution-dissolving pore-forming technology is combined, so that the preparation method has the advantages of adopting simple process equipment, being high in precision, high in controllability, low in cost, free of environmental hazards and the like.

Description

technical field [0001] The invention relates to a preparation method of silicone rubber foam, in particular to a preparation method of silicone rubber foam with a controllable multi-scale pore structure, and belongs to the technical field of polymer material processing and preparation. Background technique [0002] Silicone rubber foam combines the characteristics of radiation resistance, high and low temperature resistance, and chemical stability of silicone rubber with the characteristics of low density, heat insulation, sound insulation, and shock absorption of foam materials, and can be used as damping and shock absorbing materials, sealing materials, sound insulation and heat insulation Materials, etc., have a wide range of uses in petrochemical, transportation, aerospace, electronics and other fields. [0003] The cell size of a foam has a significant effect on its performance response. In a certain range of cell ratio, controlling the periodic network of cells in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L71/02C08L83/05C08K3/36C08K3/22C08J9/26B29C64/106B33Y10/00B33Y70/00
Inventor 耿呈祯余凤湄芦艾赵秀丽刘小兵张倩雷卫华李野
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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