Journal
SURFACE & COATINGS TECHNOLOGY
Volume 443, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2022.128580
Keywords
Superhydrophobicity; Bacterial fouling; Antifouling coating; Titanium alloy; Medical device
Funding
- Food Manufacturing Technologies Program [2019-68015-29231, A1363]
- United States Department of Agriculture [TEX09762]
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The demand for bacterial antifouling surface treatment technologies for titanium alloy medical devices is increasing. This study reports the development of a durable, fluorine-free superhydrophobic surface treatment, capable of reducing the costs and dangers associated with medical device infections.
The demand for hip arthroplasties and other joint replacement orthopedic surgeries is on the rise. Combined with the emergence of antibiotic drug resistant strains of pathogenic bacteria, there is an increasing need for the development of bacterial antifouling surface treatment technologies which can be applied to titanium alloy medical devices. Herein is reported the development of a durable, fluorine-free superhydrophobic surface treatment for Ti6Al4V, fabricated through facile means without the use of HF or fluoropolymers, utilizing safe reagents under mild reaction conditions. Nanoscale texturing was created with an alkaline hydrothermal process. An alkyl surface chemistry was imparted via the deposition of an alkyl self-assembled monolayer to achieve superhydrophobic, non-wetting behavior. This superhydrophobic surface is capable of imposing 1.55 +/- 0.13 and 1.72 +/- 0.23 log(10) reductions in the adherent populations of Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Pseudomonas aeruginosa (P. aeruginosa) bacteria, respectively. This represents a safe route to a significant potential mitigation in the costs and dangers arising from medical device associated infections.
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