Nano macromolecule microball of carboxy function type cross-linked nucleocapsid structure and preparation process thereof

Abstract

The invention is a carboxyl functional cross-linked core-shell nano high molecular microsphere and its preparing method, using multiple alkene monomers and alkene monomers with carboxyl functional groups as raw materials, on the condition of emulsifier, initiator and buffering agent, and preparing it by emulsion or suspension polymerization using water as medium; the product has a cross-linked structure inside both the core and shell, the core and shell are linked through chemical bonds, the carboxyl functional groups are grafted on the microsphere surface, and the particle size is less than 100 nm. By changing the composition of the core and shell, it obtains a nano high molecular microsphere with multiple different physico-chemical properties, and has very high freedom in selecting structure design. It solves the problem that the precious core-shell high molecular microshperes have no nano size and that the precious cores and shells are mostly linear polymers, and simultaneously by introducing ionizable and reactable carboxyl functional groups on the surface, and makes this microsphere have a completely wide application prospect in nano technical filed.

Description

technical field [0001] The invention relates to a carboxyl functional cross-linked core-shell nano-polymer microsphere and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] In recent years, the preparation of nano-polymer microspheres with core-shell structure has attracted more and more attention of researchers. This core-shell polymer microsphere not only has a nanoscale, but also can change the composition of the core and shell according to the needs, and obtain products with different physical and chemical properties, which has a high degree of freedom in design. [0003] The present inventors have successfully prepared cross-linked core-shell nano-polymer microspheres, and carried out surface epoxy functionalization on them, which solved the previous problem that the core-shell polymer microspheres do not have a nanoscale, and solved The core-shell polymer microspheres synthesized by the predecessors gene...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a carboxyl-functional cross-linked core-shell nano-polymer microsphere and its preparation method. Both the core and the shell form a cross-linked structure, which not only solves the problem of preparing nanoscale core-shell latex particles, but also solves the problem of poor solvent resistance and oil absorption of the core-shell latex particles in the past; The surface of the ball introduces carboxyl functional groups that can react with a variety of polymer matrices and have ionization characteristics, making it widely used in the fields of polymer matrix filling modification, water purifier, catalyst, protein carrier, microcapsule embedding, etc. and exhibit various good properties

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