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A kind of preparation method of open-cell organic foam material

An organic foam and open-cell technology, which is applied in the field of porous foam materials, can solve the problems of low BET specific surface area and low porosity of porous foam materials, and achieve the effect of high recycling rate

Active Publication Date: 2019-06-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the porous foam material prepared by the concentrated emulsion template method has a low porosity, few through holes connecting large pores, and a low BET specific surface area.

Method used

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  • A kind of preparation method of open-cell organic foam material
  • A kind of preparation method of open-cell organic foam material
  • A kind of preparation method of open-cell organic foam material

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preparation example Construction

[0032] A method for preparing an open-cell organic foam material, comprising the following steps:

[0033] Add surfactant, initiator and foaming agent to the monomer respectively, stir evenly to obtain oil phase solution;

[0034] Add water dropwise to the oil phase solution under stirring condition, the amount of water added is 74-99% in volume percentage, and continue stirring for 10-60min to obtain a thick emulsion;

[0035] Pour the concentrated emulsion into a mold, seal it at 50-90°C for 24-48 hours to carry out the polymerization reaction, and then dry it at 60-90°C for 24-48 hours to volatilize the water phase and form holes to obtain an open-cell organic foam base. The temperature should not be too high during the polymerization and drying process. If the polymerization temperature is too high, the emulsion will be directly destroyed. If the drying temperature is too high, the material will soften and cause the pores to disappear. Therefore, the polymerization tempera...

Embodiment 1

[0049] Weigh 5.0 g of methyl methacrylate as a monomer, add 0.1 g of Tween 20, 0.005 g of azobisisoheptanonitrile and 0.005 g of sodium bicarbonate into the monomer, mix and stir until uniform, and obtain an oil phase solution;

[0050] Add 15 g of deionized water dropwise to the oil phase solution under stirring, and continue stirring for 30 minutes to obtain a thick emulsion;

[0051] Pour the concentrated emulsion into a mold, seal it at 50°C for polymerization for 24 hours, and dry it at 60°C for 24 hours. After the water phase volatilizes, holes are formed to obtain an open-cell organic foam substrate;

[0052] The open-cell organic foam substrate is used as the secondary foaming matrix, and the foaming agent and the foaming inducer are used to perform secondary foaming treatment at 93°C for 30 minutes, and cooled to room temperature to obtain open cells. Type organic foam material.

Embodiment 2

[0054] Weigh 5.0 g of methyl methacrylate as a monomer, add 0.1 g of Tween 20, 0.005 g of azobisisoheptanonitrile, 0.005 g of sodium bicarbonate and 0.005 g of toluene into the monomer, mix and stir until uniform to obtain oil phase solution;

[0055] Add 15 g of deionized water dropwise to the oil phase solution under stirring, and continue stirring for 30 minutes to obtain a thick emulsion;

[0056] Pour the concentrated emulsion into a mold, seal it at 50°C for polymerization for 24 hours, and dry it at 60°C for 24 hours. After the water phase volatilizes, holes are formed to obtain an open-cell organic foam substrate;

[0057] The open-cell organic foam substrate is used as the secondary foaming matrix, and the foaming agent and the foaming inducer are used to perform secondary foaming treatment at 93°C for 30 minutes, and cooled to room temperature to obtain open cells. Type organic foam material.

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Abstract

The invention relates to the field of porous foamed materials, and concretely relates to a preparation method of an open-celled organic foamed material. The preparation method of the open-celled organic foamed material comprises the following steps: respectively adding a surfactant, an initiator and a foaming agent into a monomer, and uniformly stirring above substances to obtain an oil phase solution; dropwise adding water to the oil phase solution under a stirring condition, and continuously stirring the water and the oil phase solution to obtain a concentrated emulsion; pouring the concentrated emulsion into a die, carrying out a polymerization reaction at 50-90 DEG C, drying the obtained reaction product at 60-90 DEG C to volatilize the obtained water phase form holes in order to obtain an open-celled organic foamed base material; and carrying out secondary foaming treatment on the open-celled organic foamed base material at 93-300 DEG C to obtain the open-celled organic foamed material. The open-celled organic foamed material has the advantages of high perforation ratio, many through holes, high BET specific surface area, and realization of the change of the hole diameter through changing the addition amounts of the foaming agent and a foaming inducing agent.

Description

technical field [0001] The invention relates to the field of porous foam materials, in particular to a method for preparing open-cell organic foam materials. Background technique [0002] Porous material is a material with a network structure of interpenetrating or closed pores, and the boundaries or surfaces of the pores are composed of pillars or plates. Typical pore structures are: a two-dimensional structure formed by the aggregation of a large number of polygonal pores on a plane, which is called a "honeycomb" material because its shape is similar to the hexagon of a honeycomb; more commonly, it is composed of a large number of polyhedrons The three-dimensional structure formed by the accumulation of shaped holes in space is usually called "foam" material. If the solids that make up the holes only exist at the boundary (that is, the holes are connected), it is called an open hole, and if the surface of the hole is also solid, that is, each hole is completely separated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/14C08F120/18C08F120/56C08F212/08C08F220/56C08F236/10C08F220/18C08F236/14C08F2/30C08J9/08C08J9/10
CPCC08F2/30C08F120/14C08F120/18C08F120/56C08F212/08C08F220/56C08J9/08C08J9/10C08J9/103C08J9/105C08J9/107C08J2203/02C08J2203/04C08J2325/10C08J2325/14C08J2333/10C08J2333/12C08J2333/26C08F220/1804C08F220/18C08F236/14
Inventor 张晨林世航杜中杰邹威王洪
Owner BEIJING UNIV OF CHEM TECH
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