From an environmental point of view using natural materials is very beneficial. Natural products with antifouling properties have been identified from species of seaweeds, seagrasses, sponges, soft corals, and others. Chitosan is a good example that can be formed from the shells of shrimps. Other examples are furanones from algae, pepper extracts or menthol extracts.
Natural Compounds can be incorporated as an active ingredient into paints and coatings. The chemicals are released into the water and deter (settlement stages) and/or kill the fouling (post-settlement).
Key Factors Positive
- Some natural products are very effective antifouling agents. For each major fouling type it is possible to find a specific natural product to prevent or reduce fouling.
Key Factors Negative
- Their efficacy and durability is not clear.
These alternatives are much more costly than current biocidal net coatings. There are some products on the market incorporating natural antifoulants but they are rarely used due to high prices.
Potentially promising and good alternatives to toxic coatings. However, well proven commercial products for netting do not exist yet. Natural Compounds contain active ingredients so registration procedures may delay the registration and market introduction of new coatings.
|© Copyright www.crabproject.com|