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Polymer supercritical carbon dioxide foaming nucleating agent and preparation method and application thereof

A technology of foaming nucleating agent and carbon dioxide, which is applied in the field of polymer supercritical carbon dioxide foaming nucleating agent and its preparation and application, can solve the problems of low nucleation efficiency and poor fluid solubility, and achieve high nucleation efficiency , small cell size and high density

Active Publication Date: 2013-07-17
HANGZHOU COLORICH CHEM MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to use pro-CO 2 Physically modified porous inorganic nanoparticles as nucleating agents to address polymeric supercritical CO 2 Poor fluid solubility and low nucleation efficiency in foaming

Method used

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  • Polymer supercritical carbon dioxide foaming nucleating agent and preparation method and application thereof
  • Polymer supercritical carbon dioxide foaming nucleating agent and preparation method and application thereof
  • Polymer supercritical carbon dioxide foaming nucleating agent and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Synthesize SBA-15 with P123 as template: take 7.8g P123 and 200mL distilled water, stir well; weigh 48.8g concentrated HCl (37%) to adjust the pH value to 1.5, and gradually raise the temperature to 60°C; Ethyl ester was added to the system as a silicon source, stirred and hydrolyzed for 1 hour, then incubated for 3 hours, and the resulting suspension was centrifuged and washed and then dried to obtain mesoporous silica containing a template agent, which was calcined at 550°C for 5 hours to remove the template agent to obtain mesoporous silica. Silica (SBA-15) 4g, its morphology was observed by transmission electron microscope (such as figure 1 As shown in (a), the CO at 0°C was measured with a specific surface area tester 2 Adsorption properties, the results obtained see figure 2 .

[0037] Take more than 0.5g of SBA-15 synthesized under 0.01MPa vacuum condition, add 5ml of [C12MIM][PF6] / ethanol solution with a mass concentration of 1%, magnetically stir for 50min, ...

Embodiment 2

[0039] Take 0.5 g of SBA-15 synthesized according to the method of Example 1, under the vacuum condition of 0.01 MPa, add 5 ml of KH550 / ethanol solution with a mass concentration of 1%, stir it magnetically for 50 min, dry it in vacuum at 40 ° C for 6 h, and then dry it in vacuum at 80 ° C for 15 h to obtain Modified mesoporous silica particles SBA-15-NH 2 , which is a polymer supercritical carbon dioxide foaming nucleating agent, its CO at 0°C is measured with a specific surface area tester 2 Adsorption properties, the results obtained see figure 2 .

Embodiment 3

[0041] Take 0.5g of SBA-15 synthesized according to the method in Example 1, add 5ml of heptadecafluorodecyltriethoxysilane / ethanol solution with a mass concentration of 1% under the vacuum condition of 0.01MPa, stir magnetically for 50min, and dry under vacuum at 40°C After 5 hours, vacuum-dry at 80°C for 12 hours to obtain the modified mesoporous silica particles SBA-15-F, which is a polymer supercritical carbon dioxide foaming nucleating agent, and measure its CO at 0°C with a specific surface area tester. 2 Adsorption properties, the results obtained see figure 2 .

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Abstract

The invention discloses a preparation method of polymer supercritical carbon dioxide foaming nucleating agent. The preparation method includes: adding ethanol solution dissolving CO2-hydrophilic substances into porous inorganic nano particles under the condition of 0.1MPa, sufficiently stirring and directly drying to obtain the polymer supercritical carbon dioxide foaming nucleating agent. The CO2-hydrophilic substances are ion liquid and fluorosilane or silane contained coupling agent. Mass usage of the CO2-hydrophilic substances is 8-50% of the mass of the porous inorganic nano particles. The invention further discloses application of the polymer supercritical carbon dioxide foaming nucleating agent in polymer supercritical carbon dioxide foaming. By the nucleating agent, foaming agent, namely supercritical carbon dioxide, can be enriched in holes and on the surface of particles, and accordingly, nucleating efficiency is high, and prepared polymer foaming material has the advantages of small foaming hole size, uniform distribution and high density.

Description

(1) Technical field [0001] The invention relates to the preparation and application of a nucleating agent for polymer supercritical carbon dioxide foaming, in particular to a 2 A method of modifying porous inorganic particles with a substance to obtain a nucleating agent. (2) Background technology [0002] Supercritical CO 2 Because it has the characteristics of high mass transfer coefficient and good permeability of supercritical fluid itself, it also has the advantages of mild critical conditions, cheap, non-toxic, non-flammable and environmentally friendly, and has become a supercritical fluid commonly used in the preparation of micro-foaming materials. fluid. However, supercritical CO 2 It also has the disadvantages of poor solubility in polymers, fast diffusion, and low nucleation efficiency, and it is often impossible to produce foaming materials with good foaming effects. [0003] It can be seen from the foaming process of the polymer that the nucleation process i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L67/04C08L25/06C08L23/12B29C47/92B29C48/92
Inventor 杨晋涛章月芳黄凌琪陈枫范萍钟明强
Owner HANGZHOU COLORICH CHEM MATERIALS
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