Preparation method of multifunctional group bionic mussel adhesive protein polymer

Abstract

The invention discloses a preparation method of multifunctional group bionic mussel adhesive protein polymer. The preparation method comprises four processes: the synthesis and preparation of polysuccinimide prepolymer powder, the synthesis and preparation of water soluble polysuccinimide derivative, the synthesis and preparation of polyaspartic acid derivative, and the synthesis and preparation of bionic mussel adhesive protein polymer. The preparation method utilizes the characteristics of environment protection and nontoxicity of polysuccinimide and the characteristics of adhesive protein and organic coating, sufficient catechol groups introduced to a structure can perform complexation with metal ion on the surface of metal base materials to form a passive film, so that good adhesion is formed on the surface of the metal base materials, active epoxy groups and hydroxyl easily cured and crossly bonded with the organic coating are introduced into the molecular structure, the interface chemical bonding probability between the polymer and the organic coating is improved, the adhesive strength between the polymer and the organic coating is realized, and the protective performance of the whole protective coating is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, in particular to a preparation method of a multifunctional-based mussel-like adhesive protein polymer, which can be used on the surface of a metal substrate and improve the performance of the metal substrate. Adhesion strength to organic coatings. Background technique [0002] Adsorptive proteins extracted from marine mussels can adsorb between various substrates in a humid environment, and DOPA plays a major role in the adsorption process, while catechol is catechol The group is the main component of DOPA, which has high affinity and chemical versatility, enabling mussel adhesion protein to achieve super-strong adhesion on the surface of metal substrates. Studies have found that mussel adhesion protein can form a complex passivation film with metal ions on the surface of metal substrates, which plays a very good role in protecting the surface of metal substrates. Mussel adhesion prot...

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Problems solved by technology

[0003] The traditional method of extracting mussel adhesion protein and preparation method of genetic engineering cloning seriously restricts its development due to its complex and cumbersome preparation process, low output, and high price, and its output is far from meeting the market demand.

[0004] The latest research shows that the complex film formed by the adhesion protein on the surface of the metal substrate can greatly improve the corrosion protection ability of the substrate, but due to the limitation of the adsorption amount, it can only form a nanoscale film on the surface of the metal substrate to protect the substrate. The ability is limited, and the use alone cannot meet the requirements of protective use. It is one of the main directions for future development to improve the protective life of the entire protective coating by matching with organic coatings.

However, the structure of the adhesion protein is quite different from that of the coating base material resin, and the physical adhesion strength of the interface is poor. At present, there is no one that can not only firmly adhere to the surface of the metal substrate, but also maintain good adhesion with the traditional organic coating. Mussel Biomimetic Adhesin

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