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Method for preparing ordered-structure porous polymer material based on directional crystallization technology

A technology of ordered structure and directional crystallization, which is applied in the field of preparing porous polymer materials with ordered structure, can solve the problems of increasing production cost and long cycle time of porous polymer materials with ordered structure

Inactive Publication Date: 2013-01-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, it has been reported that the preparation process involved in directional crystallization needs to be carried out by freeze-drying and other methods, which not only makes the preparation cycle of polymer porous materials with ordered structure long, but also increases the preparation cost.
So far, there has been no report on the method of obtaining ordered structure polymer porous materials by direct drying without freeze-drying.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Using 11.02 grams of dimethyl sulfoxide as a solvent and 0.551 grams of polylactic acid as a solute, a polylactic acid solution was formed by magnetic stirring under a constant temperature environment of 80 degrees Celsius. Then transfer the polylactic acid solution to a square mold, let one side of the mold contact with liquid nitrogen (10°C) to make it oriented and crystallize, wash off dimethyl sulfoxide with deionized water, and dry it in an oven to obtain The desired ordered structured porous material.

[0016] The pore diameter of the obtained ordered structured porous material is about 30 microns.

Embodiment 2

[0018] Using 11.02 grams of dimethyl sulfoxide as a solvent and 0.551 grams of polylactic acid as a solute, a polylactic acid solution was formed by magnetic stirring under a constant temperature environment of 80 degrees Celsius. Then transfer the polylactic acid solution to a square mold, let one side of the mold contact with a low-temperature liquid (-18°C) to make it oriented and crystallize, then wash off dimethyl sulfoxide with ethanol, and dry it in an oven to get the obtained product. Porous material with ordered structure.

[0019] The obtained ordered structured porous material has a pore diameter of about 13 microns.

Embodiment 3

[0021] Using 11.02 grams of dimethyl sulfoxide as a solvent and 1.102 grams of polylactic acid as a solute, a polylactic acid solution was formed by magnetic stirring under a constant temperature environment of 80 degrees Celsius. Then transfer the polylactic acid solution to a square mold, let one side of the mold contact with liquid nitrogen (-196°C) to make it oriented and crystallize, then wash away the dimethyl sulfoxide with deionized water, and dry it in an oven. The desired porous material with ordered structure is obtained.

[0022] The obtained ordered structured porous material has a pore diameter of about 15 microns.

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Abstract

The invention discloses a method for preparing an ordered-structure porous polymer material by using a directional crystallization technology and using a polymer solution as a precursor, wherein dimethyl sulfoxide is used as a solvent of the polymer solution. The method comprises the following steps: adding different polymers into dimethyl sulfoxide, and forming the polymer solution by stirring at a certain temperature; transferring the polymer solution to a square mould, contacting one side of the mould with low temperature, placing in a drying oven after directionally crystallizing the solution, and drying the obtained material to obtain the ordered-structure porous polymer material. The preparation method is simple and feasible, green and environment-friendly, and wide in applicable range, the aperture is 10-30 microns, and the preparation method is a general for preparing the ordered-structure porous polymer material.

Description

technical field [0001] The invention relates to a method for preparing a polymer porous material with an ordered structure, in particular to using a polymer as a solute and dimethyl sulfoxide as a solvent to prepare a solution with a certain concentration, transferring the solution to a square mold, and allowing the One side of the mold is exposed to low temperature to cause directional crystallization, and then washed and dried to prepare polymer porous materials with ordered structure. Background technique [0002] Porous polymer materials have the advantages of high porosity, low density, large specific surface area, and good material transport capacity, and have high application value in adsorption and separation, catalysis, biological tissue engineering, and environmental science. big interest. A variety of preparation methods for polymer porous materials have been reported, such as using supercritical fluid, air blowing, colloidal template assembly, polymer precursor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L79/08C08L67/04
Inventor 章圣苗陈建定李俊杰朱芸华晔李怡濮
Owner EAST CHINA UNIV OF SCI & TECH
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