Ozeki Laboratory

1．Barnacle

　Economic damage and environmental problems caused by barnacles adhering to ship hulls, power plant cooling system pipes, and other structures have become an issue. Organotin-based compound paints such as tributyltin (TBT) used to be used in the past, but their use has been banned due to the toxicity of organotin compounds that have a negative impact on the environment. Therefore, various anti-adhesion measures are currently being researched as alternatives to TBT paints.

Fig.1 Barnacles attached to a ship^[1]

2．Patterned thin films and stainless

・Patterned thin films
　Patterned thin film is a thin film with an uneven surface on the substrate surface using a pattern mask or other means.
　It is believed that the unevenness of the surface shape is related to the attachment behavior of barnacles, and there are also examples where barnacle attachment has been reduced by changing the pattern shape.^[2][3]

　Therefore, we will evaluate whether the use of intentionally patterned samples affects barnacle attachment behavior.


・Stainless steel thin films
we will conduct experiments by depositing a stainless steel (SUS304) thin film on a smooth glass substrate using the sputtering method, and then depositing patterned DLC and patterned stainless steel.


　 4．Purpose of This Research

　The purpose of this study is to pattern DLC films with elemental additions and to evaluate barnacle adhesion due to differences in wettability.

Slides








[1]YUIME japan https://yuime.jp/post/fishing-boat-barnacles-countermeasures
[2]塚村慶子，武田正良，寺山朗，槇本佳泰(2011)　「海洋で利用する資材の生物付着耐性評価試験」， 『広島県立総合技術研究所 西部工業技術センター研究報告』54，P.61-64
[3]三菱ケミカルホールディングスグループ, PETボトル, https://www.m-chemical.co.jp/products/departments/mcc/food-packaging/product/1200448_7250.html
[4]堀内麗子, 小林聖治, 亀山雄高, 水谷正義, 小茂島潤, 勝山一郎, タテジマフジツボキプリス幼生の基材選択性と付着に及ぼす微細凹凸表面形状の影響, 材料と環境, 58巻8号, P.302-307