Construction of Hierarchical Micro/Nanostructured ZnO/Cu–ZnMOFs@SA Superhydrophobic Composite Coatings with Excellent Multifunctionality of Anticorrosion, Blood-Repelling, and Antimicrobial Properties

Abstract

Naked medical devices are often damaged by blood, bacteria, and other extreme environmental conditions (heat, humidity, acid, alkali, salts, and others), causing device failure and increasing difficulty for the operator. They can also cause inflammation and coagulation resulting in severe complications and even death. In this work, the superhydrophobic ZnO/copper−zinc metal−organic frameworks@stearic acid (ZnO/Cu−ZnMOFs@SA) composite coatings with hierarchical micro/nanostructures were fabricated on Zn substrates via a one-step hydrothermal method. The effects of hierarchical micro/nanostructures on surface wettability, physicochemical stability, and biological properties have been studied in this manuscript. The structure not only provided the coatings with robust waterproofing, abrasive resistance, durability, and thermal and light irradiation stability but also successfully recovered their superhydrophobicity by remodifying the surface with SA, showing excellent repeatability. In addition, the coating demonstrates excellent corrosion resistance and self-cleaning ability and rejects various solid and liquid contaminants. The superhydrophobic ZnO/Cu−ZnMOFs@SA composite coatings also exhibited excellent antibacterial and thrombosis resistance. The findings indicated that the superhydrophobic composite coatings have a strong potential for application in medical instruments for exhibiting multifunctional properties in various extreme environments.

Anti-corrosion properties of bio-inspired surfaces: a systematic review of recent research developments

“…These structures can generate micro/nanometer-scale deformations that exhibit cross-scale characteristics and are highly correlated with wear strength. Zhang et al 142 employed a one-step hydrothermal method to manufacture hierarchical micro/nanostructured superhydrophobic ZnO/Cu-ZnMOFs@SA composite coatings, exhibiting enhanced corrosion protection. This enhancement is attributed to both the hierarchical micro/nano-structures and the stearic acid (SA) modification, which collectively hinder aggressive ion transport.…”

Bioinspired Superhydrophobic Nanocoating Based on Polydopamine and Nanodiamonds to Mitigate Bacterial Attachment to Polyvinyl Chloride Surfaces in Food Industry Environments

“…The second group relies on coating strategies to prevent bacterial attachment on surfaces rather than inactivating bacteria after/during attachment. To this end, hydration/osmotic repulsion-based coatings − and superhydrophobic coatings − have been developed by various research groups to prevent bacterial adhesion.…”

Stable Superhydrophobic and Antimicrobial ZnO/Polytetrafluoroethylene Films via Radio Frequency (RF) Magnetron Sputtering

“…At present, there are two main research points for antibacterial materials; one is to inhibit the formation of bacterial biofilms on the surface, and the other is to kill the bacteria present on the coating [ 7 , 8 , 9 ]. Superhydrophobic surfaces (SHS) showing low bacterial adhesion due to their self-cleaning performance have been considered a promising strategy to limit bacterial attachment and subsequent biofilm formation [ 10 , 11 , 12 , 13 ]. There are many methods for preparing superhydrophobic coatings reported in recent years, which are mainly divided into two types: one is to change the roughness to obtain superhydrophobicity, and the other is to reduce the surface energy through chemical modification to form a superhydrophobic surface.…”