1 | Program Name or Ancillary Text eere.energy.gov

Water Power Peer Review

Environmentally Benign and Permanent Modifications to Prevent Biofouling on Marine and Hydrokinetic Devices

Zheng Zhang, Ph.D.Semprus BioSciences1 Kendall Square. Building 1400, Cambridge, MA 02139617/577-7755 x213 jonathan.zhang@semprusbio.comSeptember 22, 2011

2 | Wind and Water Power Program eere.energy.gov

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.

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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

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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

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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:

Budget History

FY2009 FY2010 FY2011

DOE Cost-share DOE Cost-share DOE Cost-share

160K 40K

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Settlement of Barnacle Cyprids

Protein and Bacteria Reduction

Aging Test with Artificial Seawater (ASW)

Betaine-Modified Silicone (PDMS)

Betaine-modified aluminium panels (4”X8”) for a 60-day field test