Preparation method of microsphere accumulation type polystyrene porous material

Abstract

The invention discloses a preparation method of a porous styrene thin film. The method comprises the following steps that (1) the styrene, a double bond containing comonomer, an initiating agent, a stabilizing agent and a cross-linking agent are added into a solvent prepared by absolute ethyl alcohol and deionized water; stirring is performed; the reaction is performed for 8 to 24h at the temperature of 70 to 80 DEG C; styrene copolymerized microspheres are obtained; (2) the prepared styrene copolymerized microspheres and polymers with opposite charges are mixed in an ethyl alcohol-water solvent; (3) a mixture is poured into a container; after the microspheres are settled, the solvent naturally evaporates; a polystyrene material is obtained; (4) the styrene obtained in the step (3), anhydrous ferric chloride and FDA (formaldehyde dimethyl acetal) are added into a 1,2-dichloroethane solvent; the polystyrene porous material is prepared. The preparation method has the advantages that thepreparation cost is greatly reduced; the adsorption capacity of carbon dioxide materials is improved; the chemical pollution of the materials in the preparation process is reduced; the porous materialof different sizes can be prepared; the industrial batch production and application is easy.

Description

Background technique [0001] Organic porous polymers (Porous Organic Polymers, POPs) are a class of new materials composed of carbon, nitrogen, oxygen, hydrogen and other atoms with high specific surface area, developed pore structure, low skeleton density and excellent stability. The reasons can be divided into five categories: Covalent Organic Frameworks (COFs), Conjugated Microporous Polymers (CMPs), Hyper-Crosslinked Polymers (HCPs), intrinsically porous Polymers (Polymers of Intrinsic Microporosity, PIMs) and vinyl functionalized polymers, etc. [0002] Covalent organic framework polymers (Covalent Organic Frameworks, COFs) generally connect rigid building units by covalent bonds (C-C, C-O or B-O, etc.), and POPs with an ordered crystal structure are obtained under a thermodynamically controlled reversible reaction. Conjugated Microporous Polymers (CMPs) are usually obtained by self-coupling or cross-coupling reactions catalyzed by transition metals. Polymers of Intrinsi...

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Problems solved by technology

Hypercrosslinked Polymers (HCPs) were first discovered in the Friedel-Crafts alkylation reaction to synthesize porous polystyrene network structures. This type of material has a high specific surface area, but the pore size distribution of HCPs is relatively wide. Due to the disadvantages of relatively strict preparation conditions, its application is still limited to the field of adsorption and separation.

[0003] Among the above materials, the chemical stability of COFs is poor; the reaction conditions are relatively harsh and the operation is difficult; the crosslinking reaction of HCPs occurs randomly, resulting in low regularity of the microporous network inside the material; the manufacturing cost of CMPs and PIMs is high, and the reaction harsh conditions

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