Method for superfine particle surface modification

Abstract

The invention relates to a new method for surface modification of ultrafine inorganic solid particles. It includes under the conditions of certain temperature, mechanical stirring, nitrogen protection and the presence of catalyst, with ultrafine particles as the reaction center core, and AB x or A x One-step polycondensation reaction of monomer B occurs, and a hyperbranched polymer is grafted on the surface of ultrafine particles. The surface properties of the superfine particles modified by the hyperbranched polymer grafting obtained are greatly changed, and can be well dispersed in various resin matrices and solvents. The method is simple and easy to complete in one step, and the modified inorganic solid particles can be widely used in polymer composite materials, electronic packaging materials, plastics, coatings, rubber, antibacterial materials and other fields, and the industrial application prospect is broad.

Description

technical field

[0001] The invention relates to a new method for surface modification of ultrafine particles. Background technique

[0002] As we all know, the application fields of ultrafine particles are very extensive. Taking nano-silica as an example, it can be widely used in electronic packaging materials, resin-based composite materials, plastics, coatings, rubber and antibacterial materials and other fields. However, due to the large surface energy of ultrafine particles, they are easy to agglomerate, making it difficult to disperse evenly into the polymer matrix. Directly add untreated ultrafine particles, the addition amount is generally at a very low level (generally below 1%), then the effect of ultrafine particles cannot be fully reflected. Therefore, solving the problem of ultrafine particle agglomeration and improving its dispersion in the matrix has become an important research direction. The method to solve the agglomeration and poor dispersion of ultrafin...

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