CIRIMAT, Université Toulouse 3 Paul Sabatier, CNRS, INP Toulouse, Toulouse, France.
LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France.
Nanoscale. 2024 Sep 12;16(35):16517-16534. doi: 10.1039/d4nr02810d.
Carbon nanomaterials (CNMs) are known for their antimicrobial (antibacterial and antiviral) activity when dispersed in a liquid, but whether this can be transferred to the surface of common materials has rarely been investigated. We have compared two typical CNMs (double-walled carbon nanotubes and few-layer graphene) in their non-oxidised and oxidised forms in terms of their antibacterial ( and ) and antiviral (SARS-CoV2) activities after anchoring them onto the surface of silicone. We propose a very simple and effective protocol using the air-brush spray deposition method to entrap CNMs on the surfaces of two different silicone materials and demonstrate that the nanomaterials are anchored within the polymer while still being in contact with bacteria. We also investigated their antiviral activity against SARS-COV2 after deposition on standard surgical respiratory masks. Our results show that while suspensions of double-walled carbon nanotubes had a moderate effect on , this was not transferred after anchoring them to the surface of silicone. In contrast, graphene oxide showed a very strong antibacterial effect on and oxidised double-walled carbon nanotubes on only when anchored to the surface. No significant antiviral activity was observed. This work paves the way for new antibacterial surfaces based on CNMs.
碳纳米材料（CNMs）在分散于液体中时具有抗菌（抗细菌和抗病毒）活性，但很少有人研究这种活性是否可以转移到常见材料的表面。我们比较了两种典型的 CNMs（双壁碳纳米管和少层石墨烯）在非氧化和氧化形式下，将它们锚定在硅酮表面后的抗菌（和）和抗病毒（SARS-CoV2）活性。我们提出了一种非常简单有效的方案，使用空气喷涂沉积方法将 CNMs 捕获在两种不同的硅酮材料表面上，并证明纳米材料在与细菌接触的同时仍锚定在聚合物中。我们还研究了它们在沉积在标准手术呼吸面罩上后的抗病毒活性对 SARS-COV2 的影响。我们的结果表明，虽然双壁碳纳米管悬浮液对有一定的影响，但将其锚定在硅酮表面后，这种影响并没有转移。相比之下，氧化石墨烯对和氧化双壁碳纳米管对仅在锚定到表面时表现出很强的抗菌作用。没有观察到明显的抗病毒活性。这项工作为基于 CNMs 的新型抗菌表面铺平了道路。
