Effects of surface wettability of silicon-incorporated diamond-like carbon films on barnacle larval settlement

IF 0.6 Q4 ENGINEERING, MARINE

International Shipbuilding Progress Pub Date : 2023-06-22 DOI:10.3233/isp-220008

K. Ozeki, S. Nakahara

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引用次数: 0

Abstract

The colonization of barnacles on surfaces has detrimental effects on shipping, leisure vessels, heat exchangers, oceanographic sensors, and aquaculture systems. One strategy for avoiding barnacle colonization on surfaces is to utilize surface wettability. Silicone-incorporated diamond-like carbon (Si-DLC) has high hardness and a low friction coefficient, and an increase in the incorporation of Si leads to hydrophobicity. By contrast, oxygen plasma treatment produces hydrophilicity in Si-DLC films. The improved surface wettability of Si-DLC may reduce barnacle colonization. However, few studies have been conducted on barnacle larval settlement in relation to Si-DLC films. The aim of this study is to evaluate barnacle larval settlement on Si-DLC films and on oxygen-plasma-treated Si-DLC films. Si-DLC films were prepared by radio-frequency plasma-enhanced chemical vapor deposition and treated with oxygen plasma. The films were characterized using Raman spectroscopy and X-ray photoelectron spectroscopy. Contact angles of the films were measured to evaluate their hydrophobicity. Barnacle cyprid larva settlement was observed on the Si-DLC and oxygen-plasma-treated Si-DLC films. The contact angle of the Si-DLC-0% film was 69.9 ± 3 . 3 ∘ and increased with Si incorporation. Following oxygen plasma treatment, the contact angle of the Si-DLC-0% films decreased to 10.9 ± 4 . 4 ∘ and gradually increased with Si incorporation. The barnacle cyprid larval settlement ratio for the non-coated stainless plate was 36.4%, whereas that of the DLC films was 15.0%, which decreased with Si incorporation. Following oxygen plasma treatment, the ratio of barnacle cyprid larval settlement in Si-DLC films was lower than for the Si-DLC films. The Si-DLC film was effective in avoiding barnacle adhesion, whereas the oxygen-plasma-treated Si-DLC was even more effective. This study demonstrated the feasibility of Si-DLC for antifouling against barnacles.

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含硅类金刚石膜表面润湿性对藤壶幼虫沉降的影响

藤壶在水面上的定居对航运、休闲船、热交换器、海洋传感器和水产养殖系统产生了不利影响。避免藤壶在表面定植的一种策略是利用表面润湿性。掺入硅的类金刚石碳（Si-DLC）具有高硬度和低摩擦系数，并且硅的掺入增加导致疏水性。相比之下，氧等离子体处理在Si-DLC膜中产生亲水性。Si-DLC表面润湿性的改善可以减少藤壶的定植。然而，很少有研究表明藤壶幼虫的沉降与硅DLC膜有关。本研究的目的是评估藤壶幼虫在硅DLC膜和氧等离子体处理的硅DLC薄膜上的沉降。采用射频等离子体增强化学气相沉积方法制备了硅类金刚石薄膜，并用氧等离子体处理。用拉曼光谱和X射线光电子能谱对薄膜进行了表征。测量薄膜的接触角以评估其疏水性。在Si-DLC和氧等离子体处理的Si-DLC膜上观察到藤壶幼虫的沉降。Si-DLC-0%薄膜的接触角为69.9±3。3∘，并且随着Si的掺入而增加。氧等离子体处理后，Si-DLC-0%薄膜的接触角降至10.9±4。4∘，并且随着Si的掺入而逐渐增加。无涂层不锈钢板的藤壶-鲤鱼幼虫沉降率为36.4%，而DLC膜的藤壶幼虫沉降率则为15.0%，随着Si的掺入而降低。氧等离子体处理后，藤壶-鲤鱼幼虫在Si-DLC膜中的沉降率低于Si-DLC薄膜。Si-DLC膜在避免藤壶粘附方面是有效的，而氧等离子体处理的Si-DLC甚至更有效。本研究证明了Si-DLC用于藤壶防污的可行性。

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来源期刊

International Shipbuilding Progress ENGINEERING, MARINE-

CiteScore

2.60

自引率

0.00%

发文量

期刊介绍： The journal International Shipbuilding Progress was founded in 1954. Each year four issues appear (in April, July, September and December). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as: conceptual design structural design hydromechanics and dynamics maritime engineering production of all types of ships production of all other objects intended for marine use shipping science and all directly related subjects offshore engineering in relation to the marine environment ocean engineering subjects in relation to the marine environment