Hollow organic microporous nanosphere cross-linked network and synthesis method and application thereof

Abstract

The invention discloses a diblock copolymer and a synthesis method thereof, wherein the diblock copolymer is synthesized through ring-opening polymerization and reversible addition-fragmentation chain transfer polymerization. The invention also discloses a synthesis method of a hollow organic microporous nanosphere cross-linked network from the diblock copolymer, and the hollow organic microporous nanosphere cross-linked network is prepared by Friedel-Crafts hyper-cross-linking reaction from the diblock copolymer under the action of a catalyst. The prepared cross-linked network is obtained by mutual crosslinking accumulation of hollow nanospheres as a structural unit; the spherical shells of the hollow nanospheres comprise super-cross-linked polystyrene; the diameter of the hollow nanosphere is 30 to 40 nm, the thickness is 6-7 nm; the specific surface area of the hollow organic microporous nanosphere cross-linked network is 582-806 m<2>g<-1>, the micropore area is 102-217 m<2>g<-1>, and the total pore volume is 0.77-1.28 m<3>g<-1>. The method has the advantages of simple operation, mild reaction conditions, no precious metal participation and low cost. The obtained hollow organic microporous nanosphere cross-linked network is controllable and uniform in size, and has a high specific surface area.

Description

technical field

[0001] The invention belongs to the field of polymer synthesis and the field of porous polymer materials, and in particular relates to a crosslinked network of hollow organic microporous nanospheres and its synthesis method and application. Background technique

[0002] Porous polymers have received increasing attention due to their good porosity, large specific surface area, and easy processability. In addition, stronger covalent bridging bonds endow porous polymers with higher chemical and thermal stability. Because of this, porous polymers can be used for gas storage and separation, as carriers for controlled release of drugs, as catalysts or catalyst carriers themselves, as carriers of small biological molecules or cells, filtration and separation membranes , proton exchange membranes, electrode materials for energy storage.

[0003] However, the microstructure of porous polymers often determines their properties and applications. In other words, porou...

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