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Method for preparing polymeric open cell foam material

A foaming material and polymer technology, applied in the field of preparing polymer open-cell foaming materials, can solve the problem of difficulty in controlling the amount of injected gas, heating temperature, etc., achieve no chemical residue, have cell size, and improve nucleation density and the effect of porosity

Inactive Publication Date: 2016-01-06
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, open-cell foaming materials have great requirements on foaming equipment and processes. It is difficult to control the amount of injected gas, screw structure, heating temperature and other factors that have a greater impact on foaming when selecting extrusion foaming.

Method used

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  • Method for preparing polymeric open cell foam material
  • Method for preparing polymeric open cell foam material
  • Method for preparing polymeric open cell foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method for preparing the polymer open-cell foam material of the present embodiment comprises the following steps:

[0026] (1) Mix polyethylene particles with a number average molecular weight of 40,000 and a melting point of 125 ° C and ultra-high molecular weight polyethylene and add them to an extruder or injection molding machine. The mixed material of the hole aid is prepared into a sheet-like polymer composite material; wherein, the processing temperature of the extruder is 160 ° C, the screw speed is 25 rev / min, or the processing temperature of the injection molding machine is 160 ° C; ultra-high molecular weight The weight of the base vinyl is 3% of the total weight of the polymer composite;

[0027] (2) the polymer composite material obtained in step (1) is placed in a high-pressure mold, and the molding machine closes the mold and seals the mold; first, the high-pressure mold is blown with carbon dioxide gas, and the air in the mold is replaced, and then c...

Embodiment 2

[0031] The method for preparing the polymer open-cell foam material of the present embodiment comprises the following steps:

[0032] (1) Mix polypropylene particles with a number-average molecular weight of 80,000 and a melting point of 158°C and talc powder and add them to an extruder or injection molding machine. The mixed material is prepared into a sheet-like polymer composite material; wherein, the processing temperature of the extruder is 190 ° C, the screw speed is 25 rev / min, or the processing temperature of the injection molding machine is 190 ° C; The weight of talcum powder is the polymerization 5% of the total weight of the composite material;

[0033] (2) the polymer composite material obtained in step (1) is placed in a high-pressure mold, and the molding machine closes the mold and seals the mold; first, the high-pressure mold is blown with carbon dioxide gas, and the air in the mold is replaced, and then continues to the high-pressure mold Inject carbon dioxi...

Embodiment 3

[0037] The method for preparing the polymer open-cell foam material of the present embodiment comprises the following steps:

[0038] (1) Mix polyethylene particles with a number average molecular weight of 60,000 and a melting point of 125 ° C and carbon nanotubes and add them to an extruder or injection molding machine. A sheet-like polymer composite material is prepared from the mixed material of the agent; wherein, the processing temperature of the extruder is 140 ° C, the screw speed is 25 rev / min, or the processing temperature of the injection molding machine is 140 ° C; the weight of carbon nanotubes 1% of the total weight of the polymer composite;

[0039] (2) placing the polymer composite material obtained in step (1) in a high-pressure mold, closing the mold with a molding press and sealing the mold; first purging the high-pressure mold with nitrogen, replacing the air in the mold, and then continuing to punch in the high-pressure mold Nitrogen gas was injected into...

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Abstract

The invention relates to a method for preparing a polymeric open cell foam material. By virtue of a supercritical fluid foaming technology, by way of mould foaming, under the premise that other performances of a polymer are not affected, nanoparticles with double effects of a nucleating agent and a cell-opening agent are added, so that the nucleation density and the aperture ratio of the polymer are remarkably improved. By adding a cell-opening auxiliary agent, on the one hand, an effect of a heterogeneous nucleating agent can be exerted to accelerate cells to be nucleated and to increase the cell density; on the other hand, the cell-opening auxiliary agent is a good cell-opening agent which promotes cell walls to break and increases the aperture ratio. The whole process provided by the invention is green and environmental-friendly and free of chemical residues; moreover, the pressure and temperature in a swelling treatment process can be adjusted to prepare the open cell foam material with different cell sizes. The polymer provided by the invention has a lot of open cells and is adjustable in cell size.

Description

technical field [0001] The present invention relates to a method for preparing a polymer open-cell foamed material. Background technique [0002] The open-cell foamed material means that the cells are not closed, but are connected to each other, and the matrix material exists as the walls of the cells that are connected to each other. This special cell structure allows small solid particles or liquids to flow between cells, giving it new functions and applications. It can be used as separation, adsorption materials, catalyst carriers, drug slow-release materials, etc. . [0003] The preparation of open-cell foaming materials has strict requirements on equipment and processes, and the technical difficulty is relatively high. The preparation methods are usually divided into chemical foaming and physical foaming. At present, most researches focus on chemical foaming, but chemical foaming agents The residue has a great influence on the properties of the material. Patent appli...

Claims

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Application Information

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IPC IPC(8): C08J9/12
Inventor 陈忠仁包锦标刘智峰应建行毕文超阮一平
Owner NINGBO UNIV
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