Cellulose paper has been studied for its application as an antibacterial filter, due to its robust porous structure, minimal ecological footprint, biocompatibility, and inherent antibacterial properties. Moreover, its properties can be further enhanced via surface functionalization with metallic nanoparticles (NPs) such as silver, zinc, etc. However, the synthesis of metallic NPs is challenging, costly, and environmentally harmful. On the other hand, carbon nanotubes (CNTs) are highly suitable as an additive to cellulose paper due to their high electrical conductivity, excellent mechanical strength, ease of fabrication, and antibacterial properties. In this study, we coated multi-walled carbon nanotubes (MWCNTs) on Hanji, a traditional Korean paper, using a simple dipping method and investigated its antibacterial activity against Escherichia coli (E. coli). The MWCNT-coated Hanji exhibited an inhibition efficiency of ~ 93% against E. coli cells. Moreover, the MWCNT coating resulted in improved mechanical strength, enhanced electrical conductivity, and increased hydrophobicity of the Hanji. Furthermore, it was observed that MWCNTs exhibited exceptionally stable adhesion to the Hanji surface. Our finding shows that MWCNT-coated Hanji could be utilized as an antibacterial material that is used as masks, air pollution filters, and wallpapers in hospitals and residential complexes, and an efficient platform for antiviral studies.

纤维素纸因其坚固的多孔结构、最小的生态足迹、生物相容性和固有的抗菌特性而被研究作为抗菌过滤器的应用。此外，通过银、锌等金属纳米颗粒（NP）的表面功能化可以进一步增强其性能。然而，金属纳米颗粒的合成具有挑战性、成本高昂且对环境有害。另一方面，碳纳米管（CNT）由于其高导电性、优异的机械强度、易于制造和抗菌性能，非常适合作为纤维素纸的添加剂。在这项研究中，我们使用简单的浸渍方法将多壁碳纳米管（MWCNT）涂覆在传统韩国纸韩纸上，并研究其对 大肠杆菌（E. coli）的抗菌活性。 MWCNT 涂层的 Hanji 对大肠杆菌细胞的抑制效率约为 93%。此外，多壁碳纳米管涂层还提高了韩纸的机械强度、导电性和疏水性。此外，还观察到多壁碳纳米管对韩纸表面表现出异常稳定的粘附力。我们的研究结果表明，多壁碳纳米管涂层的韩纸可以用作抗菌材料，用作口罩、空气污染过滤器、医院和住宅区的壁纸，以及抗病毒研究的有效平台。