Abstract

Siloxane-polyurethane hybrid coatings were assessed for biofouling control caused by freshwater mussels. Invasive species such as zebra (Dreissena polymorpha) and quagga (Dreissena bugensis) mussels have rapidly spread through the waterways in the United States causing major concerns in reservoir infrastructure and freshwater lakes. Current coating solutions such as biocidal anti-fouling coatings are not suitable given the released biocides which may accumulate in reservoirs. Biocide free fouling release coatings based on silicone elastomers do not have adequate mechanical durability. The siloxane-polyurethane (SiPU) coatings were evaluated using model organism laboratory assays and real-life performance was evaluated in the freshwater field environment. Two coating compositions displayed excellent performance in field trials for up to 2+ years. The surface analysis experiments of the coatings indicate that the morphology of the coatings is affected by the formulations’ solvent choice. These coatings show great promise in mitigating biofouling predominated by freshwater mussels.

摘要

评估了硅氧烷-聚氨酯混合涂料对淡水贻贝引起的生物污染控制。入侵物种，如斑马 ( Dreissena polymorpha ) 和斑马 (Dreissena bugensis )) 贻贝在美国的水道中迅速蔓延，引起了水库基础设施和淡水湖的严重关注。鉴于释放的杀生物剂可能积聚在储层中，当前的涂料溶液（例如杀生物防污涂料）不适合。基于有机硅弹性体的不含杀生物剂的防污涂层不具有足够的机械耐久性。硅氧烷-聚氨酯 (SiPU) 涂层使用模型生物实验室测定进行评估，并在淡水田间环境中评估实际性能。两种涂料组合物在长达 2 年以上的现场试验中表现出优异的性能。涂层的表面分析实验表明，涂层的形态受配方溶剂选择的影响。