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Preparation method of ordered porous polymer gel

A technology of porous hydrogel and polymer, applied in the field of preparation of porous polymer materials, can solve the problems of lack of functional groups, lack of response characteristics, limited application scope, etc., to achieve simple operation, increase process, reduce flow resistance Effect

Inactive Publication Date: 2005-07-06
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The polymer ordered pore materials introduced above are all non-deformable hard pores, lack of functional groups on the surface of the pores, and also lack of response characteristics to external fields, which greatly limits their application range.

Method used

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  • Preparation method of ordered porous polymer gel

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1. Preparation of ordered macroporous hydrogels

[0036] A water-based dispersion of monodisperse silica particles was prepared by the Stber method, and the diameter of the particles was 280nm. The above dispersion system was dried at room temperature to obtain an ordered silica template. Soak the ordered template in a homogeneously mixed solution of monomer styrene, 0.5% (for monomer) initiator AIBN, and 5% (for monomer) crosslinking agent divinylbenzene until the template is translucent. The ratio of the template to the monomer mixture can be adjusted in a wide range, based on the fact that the template is completely immersed in the mixture. Then polymerized at 60°C for 12 hours to obtain an inorganic / organic composite. The composite was soaked in 40% hydrofluoric acid for 12 hours to remove the template, then washed with water and dried at room temperature to obtain an ordered macroporous polymer network. Scanning electron microscope results show that the...

Embodiment 2

[0037] Example 2. Preparation of ordered macroporous hydrogels

[0038] The template used and the method for obtaining the organic / inorganic composite by polymerization are the same as in Example 1. Then the complex was treated with sulfuric acid with a concentration of 95-98% at 80° C. for 2 hours under stirring, rinsed with a large amount of deionized water until neutral, and dried at room temperature. It was soaked in 40% hydrofluoric acid for 12 hours to remove the silica template, and finally washed with water and dried at room temperature to obtain an ordered macroporous gel resin (as shown in route a in the accompanying drawing). The gel resin is yellow and transparent in the dry state, and shows a transparent bright color after absorbing water and swelling, indicating that the pore size of the macroporous gel is uniform and arranged in an orderly manner, and the water absorption is 4 times the original weight. The results of scanning electron microscopy showed that th...

Embodiment 3

[0039] Example 3. Preparation of Ordered Macroporous Hydrogels

[0040] A water-based dispersion of monodisperse silica particles was prepared by the Stber method, and the diameter of the particles was 80nm. Vacuum filter the dispersed system in a funnel to deposit silica spheres on a polycarbonate membrane with a pore size of less than 50 nm to form an ordered template. Soak the template in a homogeneously mixed solution of styrene monomer, 0.5% (for monomer) initiator AIBN, and 5% (for monomer) crosslinking agent divinylbenzene until the template becomes translucent. Polymerization at 70°C for 10 hours gave an inorganic / organic composite. Then the complex was treated with 80% sulfuric acid at 90° C. under stirring for 2 hours, rinsed with a large amount of deionized water until neutral, and dried at room temperature. Then soak it in 40% hydrofluoric acid for 10 hours to remove the silicon dioxide template, and finally wash with water and dry at room temperature to obtain ...

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Abstract

The invention provides a method for preparing polymer ordered porous gel, comprising: preparing a silicon dioxide monodisperse microparticle dispersion system; 0.01%-5% (weight) initiator, 1-30% (weight) crosslinking agent, and 98.99-65% (weight) of monomers and polymers, wherein the polymer is 1-30% (weight) of the weight of the monomers, impregnated in the pores of the silica template, and initiate polymerization to obtain an ordered inorganic / organic composite material; extract the uncrosslinked polymer in the prepared complex; if the monomer used contains a benzene ring, mix the complex and concentrated sulfuric acid at a mass ratio of 10:1-1:100 at 20 Sulfonation treatment is carried out at -150°C; the complex is immersed in hydrofluoric acid to remove the silica template, and an ordered gel resin is obtained.

Description

technical field [0001] The invention relates to a preparation method of a polymer porous material. Background technique [0002] In the late 1990s, the preparation of ordered porous materials became a research hotspot. This material has the characteristics of orderly arrangement of pores and the pore size can be controlled from a few nanometers to hundreds of nanometers. It is of great significance in catalytic reactions, etc.), and its submicron size characteristics endow it with special optical properties, which may play an important role in the information industry as a photonic bandgap material. Another material --- gel resin is widely used in many aspects because of its super affinity and high porosity, such as ion exchange resin, water-absorbing material, soil moisturizing agent, anti-leakage agent, sanitation Nursing supplies, etc. [0003] Ordered porous materials are generally prepared by template method. In 1998, A.Stein and D.J.Pine et al prepared TiO with a p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L33/00
Inventor 杨振忠容建华
Owner INST OF CHEM CHINESE ACAD OF SCI