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Novel Environmentally Friendly Coatings for Marine and Medical Applications

Technology Benefits

GREEN TECHNOLOGY! Biocidal components are tethered to prevent them from leaching into the environment. Marine applications: Ship hulls and other exterior surfaces exposed to marine water. Medical Application: Medical devices and hospital settings.

Detailed Technology Description

It is well known that ammonium salts deter settlement of organisms such as bacteria. This invention relates to coating formulations based on the modification of moisture cure siloxane elastomers with an alkoxysilane functional polymer containing ammonium salt groups. The mechanical properties of these coatings are similar to silicone elastomers, yet the coating contains biocidal moieties to deter settlement of organisms. To inhibit leaching of toxic components intothe water, biocide moieties are tethered to the polymer matrix. Antifouling performance has been evaluated by assessing the ability of the novel coating to inhibit or minimize bacterial biofilm formulation. Trials have been carried out on several marine and medically relevant microorganisms.

Supplementary Information

Patent Number: US7771833B2
Application Number: US2006429923A
Inventor: Ja Chisholm, Bret | Boudjouk, Philip | Thomas, Johnson | Christianson, David Allen | Stafslien, Shane Jeremy
Priority Date: 9 May 2005
Priority Number: US7771833B2
Application Date: 8 May 2006
Publication Date: 10 Aug 2010
IPC Current: B32B002520
US Class: 428447 | 525474
Assignee Applicant: NDSU Research Foundation,Fargo
Title: Anti-fouling materials containing cationic polysiloxanes
Usefulness: Anti-fouling materials containing cationic polysiloxanes
Summary: For use on e.g. surfaces of ships such as the hull, offshore marine structures such as oil rigs, seawater conduit systems for seaside plants, buoys, heat-exchangers, cooling towers, desalination equipment, filtration membranes, and docks.
Novelty: Substrate, e.g. ship surface such as hull, has antifouling coating comprising polymeric material including polyamine cross-linked polysiloxane and/or its salts

Industry

Environmental/Green Technology

Sub Category

Anti-Fouling

*Abstract

Scientists at North Dakota State University have combined biocidal and fouling release activities into a single polymeric formulation to develop a unique environmentally friendly coating that holds promise in both marine and medical applications. This novel formulation consists of biocidal moieties that are tethered to its polymer matrix, which in turn prevent them from leaching into the environment.Studies have demonstrated this biocidal moiety to be capable of killing several types of marine organisms that come in contact with the coating surface. Their complementary fouling release property enables those marine organisms not affected by the biocide to be easily sloughed off.Besides marine applications, this coating has been shown to render anti-microbial properties on medical devices.

*Principal Investigator

Name: Bret Chisholm

Department:

Country/Region

USA