Deng Yajun, Zhou Zijie, Zhang Changan, Li Hui, Lan Jianfeng, Wu Jianhua, Wang Shibin
Xiamen Key Laboratory of Marine Corrosion and Intelligent Protection Materials, Jimei University Xiamen 361021 China
RSC Adv. 2023 Oct 3;13(41):28951-28963. doi: 10.1039/d3ra05188a. eCollection 2023 Sep 26.
The settlement of microorganisms is an unwanted process in various practical fields, where also the first attaching microorganisms could promote other bacterial adhesion, causing an acceleration of bioaccumulation on the solid surface and damage to the surface functions. Developing an advanced composite coating with anti-microorganism attachment features is still a big challenge, and the critical element in any such method is to find an efficient functional agent for use in the coating system that could extend the service period. MXenes have received increasing attentions owing to their unique layer structure and large specific surface area. Increasing studies have been devoted to the development of MXene/polymer composites with creatively designed structures to realize various specific functions. Herein, two-dimensional (2D) transition metal carbide material MXene as a carrier was etched and decorated with cellulose to enhance the anchor points to grasp functional Ag nanoparticles a simple method. The MXene nanosheets (TiCT) were modified by cellulose to graft hydroxy groups on their surface, and then they were incorporated into silver nanoparticles (Ag NPs). The results showed that the cellulose could increase the loading content of the Ag NPs on the MXene surface, and also could act as a stabilized material to form the composite filler MXene@cellulose@Ag NPs (MAC), which could serve as a functional agent. Furthermore, the obtained product MAC filler exhibited excellent dispersibility and stability among all the tested fillers (MXene and MA), and it could help avoid aggregation and promote homogenous dispersal in the coating network. Besides, MAC displayed outstanding antibacterial activities against and at the same concentration among all the fillers. When the filler was embedded into the coating system, the composite coating PCB-MAC possessed abundant active Ag ions released by the Ag NPs, which could work against bacterial growth and achieve a favorable antibacterial inhibition effect. Therefore, we believe that the active MAC filler maintained high antibacterial efficiency, evincing its potential as a desirable agent for obtaining an excellent anti-adhesive behavior in numerous broad applications, such as the environment field or medical area.
微生物的附着在各个实际领域都是一个不受欢迎的过程，在这些领域中，首先附着的微生物还可能促进其他细菌的黏附，导致固体表面生物积累加速并损害表面功能。开发具有抗微生物附着特性的先进复合涂层仍然是一个巨大的挑战，而任何此类方法的关键要素是找到一种用于涂层系统的高效功能剂，以延长使用寿命。由于其独特的层状结构和大比表面积，MXenes受到了越来越多的关注。越来越多的研究致力于开发具有创造性设计结构的MXene/聚合物复合材料，以实现各种特定功能。在此，二维（2D）过渡金属碳化物材料MXene作为载体，通过纤维素进行蚀刻和修饰，以增强捕捉功能性银纳米颗粒的锚点——这是一种简单的方法。MXene纳米片（TiCT）通过纤维素进行改性，使其表面接枝羟基，然后将其与银纳米颗粒（Ag NPs）结合。结果表明，纤维素可以增加Ag NPs在MXene表面的负载量，还可以作为一种稳定材料形成复合填料MXene@纤维素@Ag NPs（MAC），其可作为功能剂。此外，所获得的产品MAC填料在所有测试填料（MXene和MA）中表现出优异的分散性和稳定性，有助于避免聚集并促进在涂层网络中的均匀分散。此外，在所有填料中，相同浓度下MAC对[具体菌种1]和[具体菌种2]均表现出出色的抗菌活性。当填料嵌入涂层系统时，复合涂层PCB-MAC具有由Ag NPs释放的大量活性银离子，可抑制细菌生长并实现良好的抗菌抑制效果。因此，我们认为活性MAC填料保持了高抗菌效率，证明了其作为一种理想试剂的潜力，可在众多广泛应用中获得优异的抗粘附性能，如环境领域或医疗领域。
