Textile coatings configured by double-nanoparticles to optimally couple superhydrophobic and antibacterial properties

Textile coatings coupling the antifouling function of superhydrophobic surface and the contact-killing antibacterial activity of surface-bound bactericides have emerged huge potential application in medical and daily protection. While some challenges remain to be solved, especially the conflict between the inherent hydrophilicity of antimicrobial modification and the demand of superhydrophobic property, as well as the requirement of universal and durable coating strategy for textiles with different surface physicochemical properties and forms. Herein, we provided a facile and universal strategy to optimally couple superhydrophobic and antibacterial properties on various textiles simply by one-step dip-coating or spray-coating procedure, which is realized by using polydimethylsiloxane (PDMS) as binder to adhere fluorinated mesoporous silica nanoparticles (F-MSNs) and quaternary ammonium-functionalized MSNs (Q-MSNs) on various textile surfaces without any need of special pretreatment and post-treatment. With the optimal ratio of F-MSNs and Q-MSNs, the resulted double-nanoparticles arranged coatings on textiles (F/Q-MSNs coatings) show CAs of 152° and SAs of 2°, thus possess not only significant antibacterial activity against both of E. coli and S. aureus due to the “repel-and-kill” synergic effect but also excellent waterproof and bacterial shielding function. Furthermore, the F/Q-MSNs coatings can well stand sandpaper abrasion, washing and strong acid/alkaline. Additionally, the coating of F/Q-MSNs can keep the textiles original application performance including breathability and deformability. Therefore, the highly feasible, flexible and universal F/Q-MSNs coatings for antibacterial modification of textiles, have promising and versatile applications in wide areas.