Supercritical CO2 foaming system used for microporous polymer preparation

A microporous polymer and foaming system technology, which is applied in the field of supercritical CO2 foaming system, can solve the problems of large cell diameter, low diffusion rate, and large interfacial tension of foaming materials, so as to improve foaming performance and improve Diffusion rate, effect of shortening the time period

Inactive Publication Date: 2012-05-02
SUN YAT SEN UNIV
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Problems solved by technology

However, in the process of fabricating microporous polymer materials, conventional supercritical CO 2 When the microcellular foaming equipment is deflated, the noise is loud and the CO 2 The diffusion rate is low, the interfacial tension between the polymer and the bubble is large, and the CO 2 The solubility in the polymer is small, and the cell diameter of the resulting foamed material is large
[000

Method used

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  • Supercritical CO2 foaming system used for microporous polymer preparation
  • Supercritical CO2 foaming system used for microporous polymer preparation
  • Supercritical CO2 foaming system used for microporous polymer preparation

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[0020] The present invention will be described in further detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the invention are not limited thereto.

[0021] like figure 1 shown, a supercritical CO for the preparation of microporous polymers 2 Foaming system, including gas supply group 1, gas-liquid separation group 2, booster group 3, preheating group 4 and supercritical CO2 connected in sequence 2 Autoclave 5. The gas supply group 1, gas-liquid separation group 2, booster group 3, preheating group 4 and supercritical CO 2 The high-pressure reactor 5 is connected by a high-pressure pipeline, and an outlet valve and an inlet valve are correspondingly provided at the inlet and outlet. The supercritical CO 2 The autoclave 5 includes an autoclave 51 , and a multi-frequency ultrasonic generator 52 is provided on the outer surface of the autoclave 51 . Further, a detachable mechanical stirring paddle 53 is provided in the high p...

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Abstract

The invention discloses a supercritical CO2 foaming system used for microporous polymer preparation. The system comprises a gas supply unit, a gas-liquid separation unit, a pressurizing unit, a preheating unit, and a supercritical CO2 high pressure reaction vessel that are connected in order. The supercritical CO2 high pressure reaction vessel includes a high pressure reaction vessel, the external surface of which is provided with multifrequency ultrasonic generators. The foaming system utilizes the high-frequency vibration of ultrasonic waves to enhance the diffusion rate and nucleation rateof supercritical CO2, thus not only being able to shorten the time period of a foaming technology, but also being able to improve the foaming performance of a polymer. The system of the invention introduces multifrequency ultrasonic waves into a supercritical CO2 foaming instrument for the first time, and can substantially improve the diffusion rate and extraction efficiency of CO2 in a polymer matrix.

Description

technical field [0001] The invention relates to the technical field of microporous polymer preparation devices, in particular to a supercritical CO 2 Foaming system. Background technique [0002] Microporous polymer materials have the advantages of light weight, high impact strength, good sound insulation, and low dielectric constant and thermal conductivity. The material is widely used in household daily necessities, vehicles, packaging and construction; while high-performance thermosetting microporous polymer materials play an important role in cutting-edge fields such as electronics, military, and aerospace. Therefore, how to improve the performance of microporous polymer materials is a very urgent problem. [0003] Although using supercritical CO 2 , N 2 The process theory of microcellular foamed thermoplastic polymers is mature. However, in the process of fabricating microporous polymer materials, conventional supercritical CO 2 When the microcellular foaming equi...

Claims

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Application Information

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IPC IPC(8): C08J9/12
Inventor 谢普容敏智章明秋
Owner SUN YAT SEN UNIV
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