| 摘要: |
| 为了开发新型无毒海洋防污涂料，试验室培养了舟形海洋底栖硅藻，采用叶绿素a值测定、体视显微镜拍照和图像定量分析方法，研究了底栖硅藻在质量分数为2％、3％、5％、10％的四种电气石涂层上的附着行为。结果表明，含2％电气石涂层对底栖硅藻的附着无明显的抑制作用，含3％电气石涂层对底栖硅藻附着的抑制作用最为明显，电气石含量继续增大为5%和10%，其抑制作用逐渐减小。电气石对底栖硅藻在涂层上附着的抑制机理在于，当电气石与海水接触时，使水分子电解，生成羟基负离子，同时电解海水，产生次氯酸钠、Cl2、HClO和ClO-等强氧化剂；这些强氧化剂对底栖硅藻具有毒性，从而抑制其生长活性，并阻止其在涂层表面的附着。电气石在新型无毒防污涂料的研发中具有重要的价值。 |
| 关键词: 电气石 防污涂层 生物附着 底栖硅藻 |
| DOI： |
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| 基金项目:国家自然科学基金（51079011，51179018）；国防基金(代号略) |
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| Settlement Behavior of Marine Benthic Diatoms on Tourmaline Coatings |
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ZHANG Zhan–ping, QI Yu–hong, LIU De–liang
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Transportation & Logistics Engineering College, Dalian Maritime University, Dalian 116026
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| Abstract: |
| For exploitation new nontoxic antifouling paints, marine benthic diatoms were incubated and used for the settlement tests in laboratory. Four coatings were prepared in which it contained respectively with 2%, 3%, 5% and 10% of tourmaline powders. The settlement behavior of marine benthic diatoms on these coatings was investigated according to the measurement of chlorophyll a and quantitative image processing based on the photos taken by stereomicroscope. The results showed that the fraction of the benthic diatoms attached on the coatings changes with the increase of tourmaline contents in paint. The coating with 2% tourmaline doesn’t inhabit obviously the settlement of benthic diatoms. The coating with 3% tourmaline strongly inhabit the settlement of benthic diatoms. The tourmaline content increases from 3% to 10%, the inhabiting effect of tourmaline decreases. The mechanism of tourmaline inhabiting the activity and the attachment of marine benthic diatoms can be attributed to that tourmaline makes water molecule decompose into H+ and OH-, at the same time, it electrolyses seawater and results in the sodium hypochlorite, Cl2，HClO and ClO- made on the surface of the coatings, these strong oxidabnts are toxic for the benthic diatoms and inhabit the activity and the attachment of marine benthic diatoms. It predicates the application potential of tourmaline in new nontoxic marine antifouling coatings. |
| Key words: tourmaline antifouling coating settlement benthic diatoms |
