Modified composite fiber membrane and layer-by-layer self-assembly method and application thereof

Abstract

The invention relates to a modified composite fiber membrane and a layer-by-layer self-assembly method and application thereof. The layer-by-layer self-assembly method of the modified composite fibermembrane includes the following steps that a micro / nano high-molecular fiber membrane is prepared; the surface of the micro / nano high-molecular fiber membrane is subjected to plasma modification, anda bottom plate is obtained; a polyelectrolyte A and a polyelectrolyte B which have opposite charges are alternately assembled on the bottom plate with a soaking layer-by-layer self-assembly technologyuntil the required layer number reaches, and the modified composite fiber membrane is obtained. Compared with a traditional layer-by-layer self-assembly method, the layer-by-layer self-assembly method of the modified composite fiber membrane is easy and convenient to operate and high in efficiency, materials which are originally hydrophobic and are not suitable for the fields of biological medicine, environmental protection and the like can have good biocompatibility, the performance of promoting cell reproduction and the like, a selection range of the bottom plate is remarkably widened, andmeanwhile an application range of the layer-by-layer self-assembly method of the modified composite fiber membrane is widened.

Description

technical field

[0001] The invention relates to the field of materials, in particular to a modified composite fiber membrane and its layer-by-layer self-assembly method and application. Background technique

[0002] Layer-by-layer self-assembly is a simple, effective, flexible, and repeatable technique for modifying the surface of materials and preparing highly ordered multilayer films. In addition, layer-by-layer self-assembly can realize nanoscale film thickness control and a wide range of substrates and film-forming substances, so it has been applied in the fields of catalysis, detection and biomaterials, and has gradually developed into a relatively mature multilayer film preparation technology. Layer-by-layer self-assembly technology can be divided into immersion method, spin coating method, spray method, etc. according to different self-assembly methods, among which the immersion method is the most widely explored and applied. The layer-by-layer self-assembly of soaki...

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