Scientists at the University of Gothenburg have shown that it is instead possible to mix into the coating molecules on which the adult barnacles cannot grow. The result has been published in the scientific journal Biofouling.
Part of the hull of a planing boat that has been painted with a copper-free TF paint with trace amounts of a macrocyclic lactone (Ivermectin). The broad stripe in the centre was painted with TF paint without additive. The boat was used in traffic on the western coast of Sweden for four months in the summer of 2009. Boat owner: Mauritz Palm. Photo: Mats Hulander
Fouling of hulls is a problem for all boat owners, and one of the most difficult organisms to deal with is barnacles. A research group at the Department of Cell and Molecular Biology has therefore studied the biology of barnacles in detail, and focussed on one particularly sensitive stage in the barnacle life cycle.
“When newly matured adult barnacles attempt to penetrate through the coating in order to establish a fixed location to grow, they are extremely sensitive to certain molecules known as ‘macrocyclic lactones’, which are normally produced by certain bacteria”, says Professor Hans-Björne Elwing of the Department of Cell and Molecular Biology at the University of Gothenburg.
“Using this discovery, we have managed to create coatings with new binding agents that shut down the release of the macrocyclic lactones into the marine environment. Further, only trace amounts of the macrocyclic lactones are required in the coating to give full effect against barnacles.”
The research group has shown through field trials on leisure craft that the addition of macrocyclic lactones can fully replace copper in coatings used on such craft, on both the eastern and the western coasts of Sweden, and for several seasons.
“While it is true that it is only barnacles that are affected by the additive, the growth of algae and similar organisms can be counteracted relatively simply by other methods.”
The study has been carried out by Emiliano Pinori, Mattias Berglin, Mats Hulander, Mia Dahlström and Hans Elwing at the University of Gothenburg, in collaboration with Lena Brive at the SP Technical Research Institute of Sweden in Borås. The article Multi-seasonal barnacle (Balanus improvisus) protection achieved by trace amounts of a macrocyclic lactone (ivermectin) included in rosin-based coatings has been published in the journal Biofouling.Bibliographic data:
Helena Aaberg | idw
Goodbye, silicon? On the way to new electronic materials with metal-organic networks
17.10.2018 | Max-Planck-Institut für Polymerforschung
High entropy alloys hold the key to studying dislocation avalanches in metals
16.10.2018 | University of Illinois College of Engineering
Scientists at the Max Planck Institute for Polymer Research (MPI-P) in Mainz (Germany) together with scientists from Dresden, Leipzig, Sofia (Bulgaria) and Madrid (Spain) have now developed and characterized a novel, metal-organic material which displays electrical properties mimicking those of highly crystalline silicon. The material which can easily be fabricated at room temperature could serve as a replacement for expensive conventional inorganic materials used in optoelectronics.
Silicon, a so called semiconductor, is currently widely employed for the development of components such as solar cells, LEDs or computer chips. High purity...
Augsburg chemists present a new technology for compressing, storing and transporting highly volatile gases in porous frameworks/New prospects for gas-powered vehicles
Storage of highly volatile gases has always been a major technological challenge, not least for use in the automotive sector, for, for example, methane or...
When we put water in a freezer, water molecules crystallize and form ice. This change from one phase of matter to another is called a phase transition. While this transition, and countless others that occur in nature, typically takes place at the same fixed conditions, such as the freezing point, one can ask how it can be influenced in a controlled way.
We are all familiar with such control of the freezing transition, as it is an essential ingredient in the art of making a sorbet or a slushy. To make a cold...
Thin organic layers provide machines and equipment with new functions. They enable, for example, tiny energy recuperators. In future, these will be installed...
Das Zusammenspiel aus Struktur und Dynamik bestimmt die Funktion von Proteinen, den molekularen Werkzeugen der Zelle. Durch Fortschritte in der...
17.10.2018 | Event News
16.10.2018 | Event News
02.10.2018 | Event News
17.10.2018 | Trade Fair News
17.10.2018 | Life Sciences
17.10.2018 | Agricultural and Forestry Science