Preparation method of polymer core nano ring of core-shell structure

Abstract

The invention belongs to the technical field of nanometer materials, and particularly relates to a preparation method of a polymer core nano ring of a core-shell structure. According to the invention,amphiphilic block polymer (wherein one block is hydrophobic poly(4-vinylpyridine) or hydrophobic amine polymer) and annular DNA are taken as raw materials, and the hydrophobic block is firstly complexed with DNA in a protonated water / methanol (or a good solvent of an amine polymer) environment, poor solvent water is continuously added, the block polymer forms the nano ring using hydrophobic polypoly(4-vinylpyridine) or hydrophobic amine polymer as the core. The method can be used for preparing the polymer nano rings with the tailored core-shell structure with different sizes, the preparationprocess is simple and convenient, and the core of the polymer nano ring can be subjected to functional modification, so that the hybrid of the polymer nano ring can be realized, and the polymer nano ring can be used as a template to prepare the composite material with excellent performances.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a preparation method of a polymer nanoring with a core-shell structure. Background technique [0002] The structure of a material determines its performance, so people have been working on the study of materials with different structures, such as hollow structures, porous structures, bicontinuous phase structures, etc. These materials with different scales and structures are used in catalysis, electrochemistry, biomedicine, etc. , photothermal and other fields have different applications. Among the many structures, the nanoring is a unique structure. In nature, many biomolecules exist in a circular structure, especially in some viruses, bacteria or sperm cells, the DNA that exists in a circular structure and protein are very common. The well-known carbon nanotubes in nature also have a ring structure. This ring structure has unique electromagnetic properties, ...

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Problems solved by technology

However, the nanorings prepared by existing research methods are irregular in structure (Science2004, 306, 94-97), or the size cannot be adjusted (Angewandte Chemie International Edition2009, 48, 4594-4597)

In our previous research, polymer nanorings can be formed through the interaction of polymer micelles and circular DNA, but this method takes a long time and requires high structural parameters (J. Am. Chem. Soc. 2014, 136, 15933 -15941)

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