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In the fields of marine antifouling, biomedicine, and flexible electronic equipment, they all face a common problem: biofouling.
The development of broad-spectrum antifouling coatings has become an important research direction in recent years.
Previous anti-fouling coating systems typically contain heavy metals or organic biocides, to ecology, environment adversely affect com" href="http://">coating line coatingol.
com .
In addition, they also have the problem of poor mechanical properties, which cannot meet the application of some specific scenarios.
Recently, the marine engineering materials team of South China University of Technology has prepared a high-strength "polymerization" based on epoxy-based antifouling zirconium clusters (rigid) and amino hyperbranched polysiloxane (flexible).
Ceramic" anti-fouling coating (Figure 1).
Figure 1.
Preparation route map of high-strength "polymer ceramic" antifouling coating
The coating is prepared by cross-linking reaction between epoxy and amino on the surface of the above two types of functional units, with simple process, high controllability, and super high transparency (>99.
5% light transmittance).
In particular, the zirconium clusters in the system endow the coating with "ceramic-like" properties, making it have excellent wear resistance, high hardness (7-9 H) and adhesion; hyperbranched polysiloxane gives the coating "Polymer-like" properties make it highly flexible (bending diameter ≤10 mm), and can be bent into a cylindrical shape more than 10 times without cracking.
At the same time, the zwitterionic components in the system give it excellent oil resistance and broad-spectrum antibacterial capabilities, which can effectively inhibit the adhesion and growth of marine bacteria and common pathogenic bacteria such as Staphylococcus aureus and Escherichia coli (Figure 2).
Figure 2.
High-strength "polymer ceramic" anti-fouling coating performance: a) high transparency; b) abrasion resistance; c) flexibility; d) oil resistance; e) broad-spectrum antibacterial properties.
This work cleverly combines rigid and flexible functional units.
Through the adjustment of the structure of the two and the cooperative flexible polymer chain cross-linking network, the two mutually exclusive key characteristics of high strength and high toughness are combined together.
Successfully prepared a new type of antifouling coating with high transparency, high strength and broad-spectrum antifouling, which is expected to be applied in marine antifouling, flexible electronic equipment and other fields.
Related work was published in Advanced Functional Materials under the title "Transparent Polymer-Ceramic Hybrid Antifouling Coating with Superior Mechanical Properties".
The first author is Chen Runze, a master student of the team, and Professor Zhang Guangzhao and Professor Ma Chunfeng are the corresponding authors of this article.
Paper link:
https://onlinelibrary.
wiley.
com/doi/full/10.
