Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 807618, Taiwan.
Photo-SMART (Photo-sensitive Material Advanced Research and Technology Center), National Kaohsiung University of Science and Technology, Kaohsiung City, 807618, Taiwan.
Macromol Rapid Commun. 2024 Oct;45(19):e2400354. doi: 10.1002/marc.202400354. Epub 2024 Jul 10.
In this work, graphene oxide (GO) and epoxy-functionalized graphene oxide (GOSi) are chosen as additives and incorporated into epoxy resin (EP) for nanocomposite photo-coating films (GO/EP and GOSi/EP series). Compared to GO/EP, the GOSi/EP nanocomposite demonstrates strong binding and excellent dispersibility, highlighting covalent bonding between GOSi and the epoxy coating. Furthermore, GOSi/EP-based films demonstrated superior thermal stability and adhesion performance on galvanized steel plates. The corrosion performance of the coated galvanized steel is investigated using electrochemical impedance spectroscopy (EIS) and polarization curve analysis (Tafel). The effectiveness of corrosion protection is evaluated based on a combination of photoreactivity, crosslinking density, dispersity, and adhesion properties. Out of all the treated films, the film based on 0.1GOSi/EP exhibited the highest percentage of inhibition (98.89%) and demonstrated superior long-term anticorrosion stability. In addition, the 0.1GOSi/EP based formulation showed remarkable antibacterial activity against S. aureus, resulting in a 92% reduction. This work demonstrates the development of a facile, environmentally friendly functionalized graphene oxide/epoxy photocured film with superior dual functionalities in both anticorrosion and antibacterial properties. These advancements hold promising potential for impactful practical applications.
在这项工作中，选择氧化石墨烯（GO）和环氧官能化氧化石墨烯（GOSi）作为添加剂，并将其掺入环氧树脂（EP）中，用于制备纳米复合光涂覆膜（GO/EP 和 GOSi/EP 系列）。与 GO/EP 相比，GOSi/EP 纳米复合材料表现出更强的结合力和优异的分散性，突出了 GOSi 与环氧涂层之间的共价键合。此外，基于 GOSi/EP 的膜在镀锌钢板上表现出优异的热稳定性和附着力。使用电化学阻抗谱（EIS）和极化曲线分析（Tafel）研究了涂层镀锌钢板的腐蚀性能。根据光反应性、交联密度、分散性和附着力等综合性能评估了腐蚀保护的有效性。在所处理的所有薄膜中，基于 0.1GOSi/EP 的薄膜表现出最高的抑制率（98.89%）和优异的长期防腐稳定性。此外，基于 0.1GOSi/EP 的配方对金黄色葡萄球菌表现出显著的抗菌活性，抑制率达到 92%。这项工作展示了一种简便、环保的功能化氧化石墨烯/环氧光固化膜的制备方法，该膜在防腐和抗菌性能方面具有双重优异的性能。这些进展为具有实际影响的应用提供了有前途的潜力。
