The synthesis of Cu doped graphene-polyaniline nanocomposite towards high antibacterial activity in physiological pH environment

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-06-14 DOI:10.1016/j.surfin.2025.106932

Tingting Wang, Aiping Zhu

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引用次数: 0

Abstract

The graphene-polyaniline (GNP-PANI) nanocomposite, a kind of important nanocomposite of PANI due to its large specific surface area, good electrical conductivity, reversible redox activity, eco-stability, and being produced on an industrial scale, has gained significant attention in the field of sensors, supercapacitors, metal anti-corrosion coatings and so on. However, its performance will sharply decline when in a neutral pH environment, which greatly limits its application. In this study, Cu doped GNP-PANI (Cu@GNP-PANI) has been first prepared to achieve high antibacterial activity in a physiological pH environment. Unlike acid doped GNP-PANI, Cu@GNP-PANI has strong delocalized π-cation interactions thus leading to unique crystallization behavior, thermal stability revealed by FT-IR, Raman, UV–Vis, XPS, HAADF-STEM and TGA analyses. The resulting aqueous polyurethane coating with 0.5 wt % of 12wt %Cu@GNP-PANI demonstrated complete antibacterial effect on both Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). The excellent antibacterial activity of Cu@GNP-PANI has been revealed to be the synergistic effects of high reactive oxygen species (ROS), electrostatic and “nano knife”.

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铜掺杂石墨烯-聚苯胺纳米复合材料在生理pH环境下具有较高的抗菌活性

石墨烯-聚苯胺（GNP-PANI）纳米复合材料具有比表面积大、导电性好、可逆氧化还原活性好、生态稳定性好等特点，是一种重要的聚苯胺纳米复合材料，在传感器、超级电容器、金属防腐涂层等领域受到广泛关注。但在中性pH环境下，其性能会急剧下降，极大地限制了其应用。在本研究中，首次制备了Cu掺杂GNP-PANI (Cu@GNP-PANI)，在生理pH环境下实现了高抗菌活性。与酸掺杂GNP-PANI不同，Cu@GNP-PANI具有强的离域π-阳离子相互作用，从而导致独特的结晶行为，通过FT-IR，拉曼，UV-Vis， XPS， HAADF-STEM和TGA分析揭示了热稳定性。所得的水性聚氨酯涂料含有0.5 wt %的12wt %Cu@GNP-PANI，对金黄色葡萄球菌（S. aureus）和大肠杆菌（E. coli）都有完全的抗菌效果。Cu@GNP-PANI优异的抗菌活性是高活性氧（ROS）、静电和“纳米刀”协同作用的结果。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)