Fabrication of waterborne antibacterial/antistatic nanocomposite coatings at low content of Ti3C2 nanosheets via quaternary ammonium salt modification
Year: 2025
Type: article
Abstract: MXenes have attracted significant attention due to their unique properties, including antibacterial property and electrical conductivity. However, the antibacterial performance of MXenes-based coatings strongly depends on their superficial distribution. In this study, Ti 3 C 2 nanosheets were modified with dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium (QAS) and further incorporated into waterborne epoxy coatings. Influence of modifier ratio on the distribution of QAS-modified Ti 3 C 2 nanosheets (Q-Ti 3 C 2 ) in coatings as well as on the antibacterial/antistatic performance of coatings was investigated. Appropriate amount of QAS (i.e., 10 %) for modification was critical to achieve high antibacterial performance at low content of Ti 3 C 2 nanosheets. The Q-Ti 3 C 2 embedded coating could get 99.4 % inhibition against E. coil and 100 % against S. aureus at 0.5 wt% loading. In contrast, the coating with unmodified Ti 3 C 2 only exhibited antibacterial rate of 85.3 % and 87.4 % for E. coil and S. aureus , respectively. The prominent antibacterial performance of Q-Ti 3 C 2 based coatings mainly results from the enriched residence of Ti 3 C 2 nanosheets at the upper layer of coatings and partially from the intrinsic antibacterial property of QAS. Additionally, the superficial distribution of Ti 3 C 2 nanosheets endowed the coatings with low surface resistance of 1.8 × 10 9 Ω, thereby conferring antistatic properties, and hence, facilitating antibacterial durability, even if the coating contains as low as 1 wt% Q-Ti 3 C 2 nanosheets. The nanocomposite coatings also exhibited better adhesion and high pencil hardness.
Source: Progress in Organic Coatings
Authors: Wei Zhang, Lianfeng Wu, Shuxue Zhou
Institution: Fudan University
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,350
OpenAlex ID: W4415355066