生物相容性超疏水涂层的自愈：粒子大小和负载的相互作用,Langmuir

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生物相容性超疏水涂层的自愈：粒子大小和负载的相互作用
Langmuir ( IF 3.7 ) Pub Date : 2023-02-22 , DOI: 10.1021/acs.langmuir.2c02795
Nusret Celik _{1,

2} , Furkan Sahin ₁ , Sultan Suleyman Ozel ₂ , Gulay Sezer ₃ , Nail Gunaltay ₁ , Mahmut Ruzi ₁ , M Serdar Onses _{1,

2,

4}

Affiliation

超疏水涂层的广泛应用潜力受到环境威胁材料的使用和耐久性差的限制。受自然启发设计和制造自修复涂层是解决这些问题的一种很有前途的方法。在这项研究中，我们报告了一种无氟且具有生物相容性的超疏水涂层，它可以在磨损后进行热修复。涂层由二氧化硅纳米粒子和巴西棕榈蜡组成，自我修复基于蜡的表面富集，类似于植物叶片中的蜡分泌。该涂层不仅表现出快速的自愈性，在适度加热下仅需 1 分钟，而且在愈合后表现出更高的防水性和热稳定性。涂层的快速自愈能力归因于巴西棕榈蜡的相对较低的熔点及其迁移到亲水性二氧化硅纳米粒子的表面。自我修复对粒子大小和负载的依赖性提供了对该过程的深入了解。此外，该涂层表现出高水平的生物相容性，其中成纤维细胞 L929 细胞的活力约为 90%。所提出的方法和见解为自修复超疏水涂层的设计和制造提供了有价值的指导。

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Self-Healing of Biocompatible Superhydrophobic Coatings: The Interplay of the Size and Loading of Particles

The broad application potential of superhydrophobic coatings is limited by the usage of environment-threatening materials and poor durability. The nature-inspired design and fabrication of self-healing coatings is a promising approach for addressing these issues. In this study, we report a fluorine-free and biocompatible superhydrophobic coating that can be thermally healed after abrasion. The coating is composed of silica nanoparticles and carnauba wax, and the self-healing is based on surface enrichment of wax in analogy to the wax secretion in plant leaves. The coating not only exhibits fast self-healing, just in 1 min under moderate heating, but also displays increased water repellency and thermal stability after healing. The rapid self-healing ability of the coating is attributed to the relatively low melting point of carnauba wax and its migration to the surface of the hydrophilic silica nanoparticles. The dependence of self-healing on the size and loading of particles provides insights into the process. Furthermore, the coating exhibits high levels of biocompatibility where the viability of fibroblast L929 cells was ∼90%. The presented approach and insights provide valuable guidelines in the design and fabrication of self-healing superhydrophobic coatings.

更新日期：2023-02-22

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