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Environmentally Benign Solutions to Combat Biofouling in Marine and Hydrokinetic Devices

This project focuses on developing environmentally friendly, permanent modifications to prevent biofouling on marine and hydrokinetic devices. The objectives include improving energy efficiency, reliability, power quality, and reducing maintenance costs. By leveraging advanced molecular design of betaine-based monomers and polymers, the aim is to achieve superior anti-fouling properties compared to current underwater coatings. Key milestones involve polymer synthesis, performance testing, and field evaluations to demonstrate long-term efficacy and biocompatibility.

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Environmentally Benign Solutions to Combat Biofouling in Marine and Hydrokinetic Devices

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  1. Water Power Peer Review Zheng Zhang, Ph.D. Semprus BioSciences 1 Kendall Square. Building 1400, Cambridge, MA 02139 617/577-7755 x213 jonathan.zhang@semprusbio.com September 22, 2011 Environmentally Benign and Permanent Modifications to Prevent Biofouling on Marine and Hydrokinetic Devices

  2. Purpose, Objectives, & Integration Purpose: Develop environmentally benign and permanent modifications to prevent biofouling on marine and hydrokinetic (MHK) devices. Objectives: Offer improvements and enhancements to MHK systems in the following segments related to biofouling: • Energy efficiency • Reliability • Power quality • Environmental impact • Maintenance costs Integration: Expect to outperform currently used nontoxic underwater coatings in biofouling resistance and be ready for the next stage of development with demonstration in MHK systems.

  3. Technical Approach • Design and develop modification systems applicable for permanent anti‐fouling modifications. (Planned completion date: 9/30/2011) • Monomer and polymer synthesis • Modification formulation development • Curing/applying method development • Characterization and stability evaluation • Demonstrate a broad spectrum of anti‐biofouling performance, long‐term efficacy and biocompatibility. (Planned completion date: 12/31/2011) • Protein adsorption assay • Bacterial/biofilm assay • Barnacle assay • Biocompatibility evaluation • 60‐day field test

  4. Key Issues and Unique Approach Key Issues • Broad spectrum of anti-fouling efficacy • Mechanical properties, applicability, and compatibility to current underwater coatings • Long-term stability and anti-fouling performance • Translation to field efficacy Unique Approach • Molecular design of betaine-based monomers and polymers to resist bio-fouling. • Optimized formulations and applying conditions to achieve high anti-fouling efficacy with mechanical performance and stability • Modification and application adaptable to current underwater coating systems. • Demonstration of anti-fouling performance with model fouling organisms and a 60-day field test

  5. Plan, Schedule, & Budget Schedule: • Initiation date: January 1, 2011 • Planned completion date: December 31, 2011 • Milestones for FY10 and FY11: • Milestone 1: Design modification systems and synthesize polymers applicable for permanent anti‐fouling modifications. Planned completion date: September 30, 2011 • Milestone 2: Demonstrate a broad spectrum of anti‐biofouling performance, long‐term efficacy, and biocompatibility. Planned completion date: December 31, 2011 Budget:

  6. Protein and Bacteria Reduction Betaine-Modified Silicone (PDMS) Betaine-modified aluminium panels (4”X8”) for a 60-day field test Aging Test with Artificial Seawater (ASW) Settlement of Barnacle Cyprids

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