Controlled release material for fouling organism-sensitive response anti-fouling agent and preparation method of controlled release material

Abstract

The invention relates to a controlled release material for a fouling organism-sensitive response anti-fouling agent and a preparation method of the controlled release material. The controlled release material contains a coated precursor and a cross-linking agent; a hyaluronic acid / poly L-lysine controlled release material of a nano thin-shell structure is prepared through alternating layer-by-layer self-assembly of hyaluronic acid and poly L-lysine; a poly-(allylamine hydrochloride) / poly L-glycine controlled release material of the nano thin-shell structure is prepared through alternating layer-by-layer self-assembly of poly-(allylamine hydrochloride) and poly L-glycine; and the cross-linking agent is prepared by compounding 1-(3-dimethylamino propyl)-3-ethylenediamine hydrochloride and N-hydroxysulfosuccinimide sodium salt. For a water-soluble anti-fouling agent, a fouling organism-sensitive response nano thin-shell is prepared from sodium carbonate as a template and the anti-fouling agent is loaded; and a water-based insoluble or micro-soluble antifouling agent is directly coated with a fouling organism-sensitive response controlled release material. The controlled release material is simple in process and friendly to environment; the target of adaptive regulation of release of the anti-fouling agent along with fouling organism attachment change in low and peak seasons is achieved on the basis of a special catalytic hydrolysis characteristic of fouling organism extracellular protease on the controlled release material; and the anti-fouling period of the paint is prolonged.

Description

[0001] Technical field: [0002] The invention relates to a biofouling sensitive response antifouling agent controlled release material and a preparation method thereof, belonging to the field of marine biofouling protection. [0003] Background technique: [0004] Biofouling will cause serious harm to ships and underwater facilities. The existing solution is mainly to apply antifouling coatings. Antifouling agent-based antifouling coatings currently have the largest market share of coatings. Since the content of antifouling agents in coatings is limited, the controlled release of antifouling agents is a key means to extend the antifouling effect of such coatings on the premise of maintaining antifouling effect. The existing antifouling coatings are mainly based on tin-free self-polishing antifouling coatings, and there are three main problems: First, the antifouling agent in the coating lacks effective controlled release technology, and the antifouling agent is prone to "burst...

AI Technical Summary

Problems solved by technology

The existing antifouling coatings are mainly based on tin-free self-polishing antifouling coatings, and there are three main problems: First, the antifouling agent in the coating lacks effective controlled release technology, and the antifouling agent is prone to "burst release" phenomenon , leading to a large amount of waste, resulting in a generally short antifouling life of antifouling coatings (generally only 3-5 years); second, copper substances (cuprous oxide, pyrrolidone, etc.) currently used in large quantities as major antifouling agents are harmful to The marine ecological environment has a destructive impact, has been banned in some areas, and is facing a trend of being restricted and banned; third, with the in-depth implementation of my country's marine strategy, large-scale ships with long docking intervals and high voyage rates are built in batches , long-term antifouling coating materials are required to match it, and the existing coating life is difficult to meet its long-term antifouling requirements

However, there are still serious deficiencies in sustained-release technology

First, the antifouling agents adsorbed by porous materials are generally released by diffusion, and the release process is less affected by marine environmental factors such as seawater temperature and pH value; second, the antifouling agents suspended from the side chains of self-polishing resins are generally released through hydrolysis , the release rate is poorly correlated with the growth level of fouling organisms, seasons, etc.

The above factors lead to a poor correlation between the release of antifouling agents and the growth level of fouling organisms. Even in areas with low growth levels of fouling organisms such as off-seasons or deep seas, antifouling agents are still released continuously, which is controllable. However, there is still serious waste, and it is difficult to meet the controlled release requirements of antifouling agents in the development of long-acting and environmentally friendly antifouling materials.