Zhang Yabei, Ding Xiaoya, Zhang Xu, Mao Zhiyong, Xu Xiaoyu, Kang Fuyan, Tan Qianyun, Li Yudong, Liu Fa-Qian
School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China.
ACS Appl Mater Interfaces. 2025 Aug 20;17(33):47766-47780. doi: 10.1021/acsami.5c14388. Epub 2025 Aug 7.
Marine biofouling constitutes a pervasive biological threat that seriously impedes the sustainable development of the marine economy. Slippery liquid-infused porous surfaces (SLIPS) were typically employed as marine coatings to mitigate biofouling. However, SLIPS are often hindered by rapid lubricant leaching, short service life, and a simple antifouling strategy, thereby limiting their applicability in marine environments. To circumvent the limitations of conventional SLIPS, synergistic antifouling strategies were frequently adopted. In this study, we developed a copper/graphene nanofluid-infused porous surface (Cu/G@uPDMS-oil) utilizing the breath figure method. The nanofluid can be firmly locked into the microstructure within polydimethylsiloxane (PDMS) to form a stable lubricating layer and provide a sustained release of silicone oil due to dynamic hydrogen bonding. In addition, when silicone oil is released from the coating surface, the intrinsic copper (Cu) and graphene (G) nanoparticles come into substantial contact with the surrounding solution, leading to galvanic corrosion. Galvanic corrosion produces synergistic antifouling through a dual mechanism of induced oxidative stress and copper ion (Cu) release. Consequently, the resulting coating exhibits high stability, continuous silicone oil leaching, and self-replenishing properties. Due to the labyrinth effect of graphene, the release rate of Cu is significantly diminished to 6.2 μg·cm·day. Furthermore, this nanofluid-based smooth surface demonstrates superior antibacterial, anti-algal, and anti-conch properties. The developed Cu/G@uPDMS-oil coating holds great potential for significantly mitigating marine biofouling.
海洋生物污损构成了一种普遍存在的生物威胁，严重阻碍了海洋经济的可持续发展。注入滑液的多孔表面（SLIPS）通常被用作海洋涂层以减轻生物污损。然而，SLIPS常常受到润滑剂快速浸出、使用寿命短以及防污策略单一的阻碍，从而限制了它们在海洋环境中的适用性。为了规避传统SLIPS的局限性，人们经常采用协同防污策略。在本研究中，我们利用呼吸图案法开发了一种注入铜/石墨烯纳米流体的多孔表面（Cu/G@uPDMS-油）。纳米流体可以被牢固地锁定在聚二甲基硅氧烷（PDMS）的微观结构中，形成稳定的润滑层，并由于动态氢键作用而实现硅油的持续释放。此外，当硅油从涂层表面释放时，固有的铜（Cu）和石墨烯（G）纳米颗粒会与周围溶液大量接触，导致电偶腐蚀。电偶腐蚀通过诱导氧化应激和铜离子（Cu）释放的双重机制产生协同防污作用。因此，所得涂层具有高稳定性、硅油的持续浸出以及自我补充性能。由于石墨烯的迷宫效应，Cu的释放速率显著降低至6.2 μg·cm·天。此外，这种基于纳米流体的光滑表面表现出优异的抗菌、抗藻和抗海螺性能。所开发的Cu/G@uPDMS-油涂层在显著减轻海洋生物污损方面具有巨大潜力。
