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Mesoporous polydivinylbenzene material with hypersorption characteristic and synthesis method thereof

A technology of polydivinylbenzene and divinylbenzene, which is applied in the field of physical chemistry, can solve the problems of limited application of mesoporous polymers, no swelling property, high synthesis cost, and achieves simple and easy synthesis process and synthesis cost. The effect of low, strong adsorption capacity

Inactive Publication Date: 2008-03-19
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the above-mentioned synthesis method being cumbersome and complicated, the requirements for synthesis conditions are relatively strict, the synthesis cost is high, and the synthesized samples have certain limitations and other shortcomings, the application of mesoporous polymers has been largely limited to a certain extent.
The reported synthesized porous polydivinylbenzene is a highly cross-linked polymer and does not show good swelling properties.

Method used

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  • Mesoporous polydivinylbenzene material with hypersorption characteristic and synthesis method thereof
  • Mesoporous polydivinylbenzene material with hypersorption characteristic and synthesis method thereof
  • Mesoporous polydivinylbenzene material with hypersorption characteristic and synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1: Mesoporous polydivinylbenzene PDVB-THF-0 synthesized in tetrahydrofuran system.

[0026] Dissolve 2g of divinylbenzene (DVB) monomer and 0.05g of azobisisobutyronitrile (AIBN) in 20mL of tetrahydrofuran, and after stirring for 4 hours, transfer the above solution to a reaction kettle and place it in an oven at 100°C for 48 Hour. The reactor was taken out to volatilize tetrahydrofuran to obtain mesoporous polydivinylbenzene PDVB-THF-0.

[0027] The results of nitrogen adsorption experiments are shown in Fig. 1. The type IV adsorption isotherm given by sample PDVB-THF-0 indicates that the sample has a mesoporous structure and a relatively narrow pore distribution (~3.9nm). Figure 2 is a transmission electron microscope (TEM) photo of the sample PDVB-THF-0. The results further confirm the nitrogen adsorption results. From Figure 2, we can clearly see the existence of abundant mesopores. The BET specific surface area of ​​sample PDVB-THF-0 is 557m 2 / g.

[0...

Embodiment 2

[0030] Example 2: Synthesis of mesoporous polydivinylbenzene PDVB-THF-x in a composite system of tetrahydrofuran and water.

[0031] Dissolve 2 g of divinylbenzene (DVB) monomer and 0.05 g of azobisisobutyronitrile (AIBN) in 20 mL of tetrahydrofuran, then add x mL of water, where x=1.0, 1.2, 1.4, 1.6, 1.8, 2.0, and stir After 4 hours, the above solution was transferred to a reaction kettle and placed at 100° C. for 48 hours. The reactor was taken out to volatilize tetrahydrofuran to obtain mesoporous polydivinylbenzene PDVB-THF-x.

[0032] In this example, the amount of water is not limited to 1-2 mL, but can be adjusted from 0 to 10 mL, and 1-2 mL is selected for convenience of discussion. When it is less than 1mL, the regulating effect of the pore size is not obvious. A further increase in pore size can be achieved when greater than 2 mL. The sample of PDVB-THF-10 also has a higher specific surface area of ​​650m 2 / g. But the pore distribution is relatively broad. It ...

Embodiment 3

[0035] Example 3: Synthesis of mesoporous polydivinylbenzene PDVB-acetone in acetone system.

[0036] Replace tetrahydrofuran in Example 1 with 20 mL of acetone, and the rest of the steps are the same as in Example 1. Referring to Figure 9, the nitrogen adsorption isotherm shows that the sample has the characteristics of a composite pore structure of micropores and mesoporous pores. From the results of BJH pore distribution and DFT pore distribution, it can be seen that the sample has both mesopores of ~3.9nm and pore diameters of ~1.1nm. microporous. BET specific surface area can reach 416m 2 / g, of which micropore 173m 2 / g, mesopore 242m 2 / g.

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Abstract

The invention belonging to the technical field of material chemistry relates to a polydivinylbenzene material with a super strong absorption characteristic and a synthesis method, in particular to a mesoporous polymer in which polymeric chains loose enlace polydivinylbenzene as a framework, the specific surface area is 200 to 700 m 2 / g, the water absorption capability is nearly 2.0 g / g, and the liquid absorption capability reaches 17 g / g. Divinylbenzene monomers are dispersed into organic solution, which is then added with azobisisobutyronitrile as initiator, after stirring, the solution is poured into a reaction kettle, and the mesoporous polymer material is synthesized by a solvent thermal process. The method of the invention avoids the traditional step of removing template agent in the synthesis of mesoporous materials, and the size of mesopore can be regulated by selecting different solution. The synthesis process is simple, requirement is low, and cost is low. The mesoporous polymer of the invention can be widely applied to absorbing organic pollutants, treating pollution caused by the leakage of organic matters.

Description

technical field [0001] The invention belongs to the technical fields of physical chemistry and material chemistry, and in particular relates to a preparation method of a porous polymer material. Background technique [0002] As a functional polymer material, mesoporous polymers have potential application prospects in many high-tech fields, such as biology, sensing, catalysis, adsorption and other fields. Porous polymers have shown unique properties. According to the nomenclature of inorganic mesoporous materials, mesoporous polymer materials refer to polymer materials with pore diameters ranging from 2 to 50 nm. However, the reports on mesoporous polymers are much less than those on mesoporous inorganic materials. This is because the synthesis method of inorganic mesoporous materials is not suitable for the polymerization conditions of most polymers. [0003] Generally, the synthesis of mesoporous polymers includes hard template synthesis, phase separation technology synth...

Claims

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Application Information

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IPC IPC(8): C08F112/36C08F4/04C08J9/28B01J20/26
Inventor 肖丰收张永来刘福建魏舒
Owner JILIN UNIV
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