Waste plastic based hypercrosslinked polymer with adjustable pore size as well as preparation method and application thereof

A super-crosslinking and polymer technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problem of water pollution, difficult to efficiently remove organic pollutant molecules, polystyrene-based Porous materials cannot adapt and meet the needs of production and practical applications, etc., to achieve the effect of solving polluted environment, good market application prospects, and remarkable removal effect

Active Publication Date: 2019-04-26
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, polystyrene-based porous activated carbon materials are difficult to efficiently remove organic pollutant molecules of different sizes, and cannot solve the increasingly serious environmental problems of water pollution.
Therefore, the polystyrene-based porous materials prepared by traditional methods cannot adapt and meet the needs of production and practical applications.

Method used

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  • Waste plastic based hypercrosslinked polymer with adjustable pore size as well as preparation method and application thereof
  • Waste plastic based hypercrosslinked polymer with adjustable pore size as well as preparation method and application thereof
  • Waste plastic based hypercrosslinked polymer with adjustable pore size as well as preparation method and application thereof

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preparation example Construction

[0023] Embodiments of the present invention provide a method for preparing a waste plastic-based hypercrosslinked polymer with adjustable pore size, comprising the following steps:

[0024] Mix the polystyrene foamed plastic with the solvent 1,2-dichloroethane and the crosslinking agent methylal, and after fully dissolving, add the catalyst anhydrous ferric chloride to crosslink for 12 hours at 80°C. The system was cooled to room temperature, washed three times with acetone, dilute hydrochloric acid and water respectively, then extracted with methanol for 24 hours, and dried in vacuum for 12 hours to obtain a hypercrosslinked polymer; polystyrene foamed plastics were selected from waste polystyrene foam Foam plastic; the mass ratio of polystyrene foam plastic to anhydrous ferric chloride is 1:4-1:10, and the mass ratio of polystyrene foam plastic to methylal is 1:10.

[0025] In the above process, if the polystyrene foamed plastic is pre-crosslinked, hypercrosslinked polymers ...

Embodiment 1

[0030] Embodiment 1: Weigh 0.5006g polystyrene foamed plastic (Expandable Polystyrene; EPS) and dissolve in the mixed solution of 40mL acetic acid and 5.6mL methylal at room temperature, then add 2.23 g anhydrous ferric chloride; The above-mentioned system Carry out pre-crosslinking reaction at 80°C for 1 h, and then carry out purification treatment to obtain the precursor of secondary crosslinking; add 40 mL of 1,2-dichloroethane and 5.6 mL of methylal to the obtained precursor, and then Then add 10g of anhydrous ferric chloride for secondary cross-linking. After the reaction system is cooled to room temperature, wash with acetone, dilute hydrochloric acid and water for 3 times respectively, then extract with methanol for 24 hours, and dry in vacuum for 12 hours to obtain super-cross-linked polymerization. Object EPS-FDA-2.

[0031] The preparation process of the embodiment of the present invention 1 sees figure 1 .

[0032] The comparison results of the adsorption properti...

Embodiment 2

[0038] Weigh 0.5006g of expanded polystyrene (Expandable Polystyrene; EPS) and dissolve it in a mixed solution of 40mL of 1,2-dichloroethane and 5.6mL of methylal at room temperature, and then add 2.23g of anhydrous ferric chloride; The above system was subjected to cross-linking reaction at 80 °C for 12 h. After the reaction system was cooled to room temperature, it was washed 3 times with acetone, dilute hydrochloric acid and water respectively, then extracted with methanol for 24 h, and vacuum-dried for 12 h to obtain a hypercross-linked polymer. EPS-FDA-1.

[0039] The preparation process of the embodiment of the present invention 2 sees image 3 .

[0040] The specific surface area and pore size distribution parameters of the hypercrosslinked polymer EPS-FDA-2 prepared in Example 1 of the present invention and the hypercrosslinked polymer EPS-FDA-1 prepared in Example 2 are shown in Table 2.

[0041] Table 2: Specific surface area and pore size distribution parameters o...

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Abstract

The invention provides a preparation method of a waste plastic based hypercrosslinked polymer with an adjustable pore size. The preparation method comprises the following steps: mixing polystyrene foamed plastics with 1,2-dichloroethane and methylal, fully dissolving the mixture, adding anhydrous ferric chloride for catalysis for performing a single-step crosslinking reaction or performing secondcrosslinking after pre-crosslinking with acetic acid and methylal, and performing purification, so as to obtain the hypercrosslinked polymer with the adjustable pore size and high specific surface area. Compared with a molecular sieve, zeolites and various commercial activated carbons that are used in the market, the hypercrosslinked polymer obtained by the preparation method has the advantages ofbeing obvious in removing effect and being low in cost; the preparation method provided by the invention is mild in process, and the waste polystyrene foamed plastics are turned into wealth, so thatthe problem that the environment is polluted by the waste plastics is effectively solved. Therefore, the preparation method has good market application prospect.

Description

technical field [0001] The invention relates to the technical field of hypercrosslinked polymers, in particular to a waste plastic-based hypercrosslinked polymer with adjustable pore size, a preparation method and application thereof. Background technique [0002] Polystyrene foam is a polystyrene with a linear structure, which has excellent mechanical and insulating properties, and is used in large quantities as a polymer material for the preparation of resin-molded articles. Transforming waste polystyrene into high value-added materials can also solve the environmental pollution problem caused by solid waste to a certain extent. Therefore, the research of realizing waste polystyrene turning waste into treasure has always been a research hotspot of scientific researchers. Polystyrene foamed plastic is a porous material, mainly using polystyrene as a template to prepare hollow carbon and carbon film materials, or direct carbonization, composite carbonization with other subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C08J3/24C08L25/06C08K3/16C02F101/34C02F101/38
CPCB01J20/267C02F1/285C02F2101/34C02F2101/38C08J3/24C08J2325/06C08K3/16
Inventor 廖桂英胡爱彬刘艳阳门彬
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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