Slippery anti-biofouling coatings on Mg alloy with lubricant self-replenishing performance

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-06-05 Epub Date: 2025-03-08 DOI:10.1016/j.colsurfa.2025.136587

Congcong Niu , Xiankun Lin , Doudou Zhang , Jiangpeng Liu , Jie Xu , Qiang He

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Abstract

The limited durability and difficulty in repairing damaged lubrication layers are significant challenges hindering the practical applications of slippery liquid-infused porous surfaces (SLIPS) in fields such as marine antifouling. Here, we present an antifouling SLIPS coating with lubricant self-replenishing properties by grafting silica aerogel onto the layered double hydroxide (LDH) structure. The LDH structure is synthesized on the surface of Mg alloy via a hydrothermal reaction. Following the curing of polymethylsiloxane, silica aerogel is grafted onto the surface, and lubricating oil is infused to obtain the SLIPS coating. The LDH structure provides interconnected microcavities for lubricating oil storage, enabling self-replenishing properties when the lubricating layer is damaged, thereby enhancing the coating's durability. The SLIPS coating exhibits high performance in resisting adhesion of Chlorella vulgaris, Phaeodactylum tricornutum, and Pseudoaltteromonas nigrifaciens, achieving an over 80 % reduction in fouling organism coverage compared to bare Mg. This study presents a promising approach for the application of SLIPS in antifouling.

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具有润滑油自补性能的镁合金防滑涂层

滑溜液体注入多孔表面（slip）在船舶防污等领域的实际应用面临着耐久性有限和修复受损润滑层困难的重大挑战。在这里，我们通过将二氧化硅气凝胶接枝到层状双氢氧化物（LDH）结构上，提出了一种具有润滑油自补充性能的防污slip涂层。通过水热反应在镁合金表面合成了LDH结构。将聚甲基硅氧烷固化后，在表面接枝二氧化硅气凝胶，并注入润滑油，得到slip涂层。LDH结构提供了相互连接的微腔用于润滑油储存，当润滑层被损坏时，可以实现自补充性能，从而提高涂层的耐久性。该涂层在抵抗普通小球藻、三角褐指藻和黑色假异单胞菌的粘附方面表现出优异的性能，与裸露的Mg相比，污染生物覆盖率降低了80% %以上。本研究为slip在防污中的应用提供了一条很有前途的途径。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.