FUNCTIONAL COATINGS FOR MULTIDISCIPLINE APPLICATIONS

Ori Geuli 1 Noam Eliaz 2 Daniel Mandler 1
1Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
2Biomaterials and Corrosion Lab, Department of Materials Science and Engineering, Tel Aviv University, Tel Aviv, Israel

The term "Functional Coating" describes systems, which possess additional properties along with the bulk characters. The unique functionality is derived from the desired application. For instance, applying antibacterial coatings for orthopedic and dental implants is highly appealing, while anti-corrosive coatings are mandatory for water systems. This research presents the development of novel functional coatings for multidiscipline applications.

Antibacterial coatings were fabricated by loading hydroxyapatite (HAp) nanoparticles (NPs) with different antibiotics, following by their electrodeposition onto titanium implants [1-3]. The concept of local drug delivery in the vicinity of the implantation has significant impact on the prophylaxis of infections, while avoiding unnecessary systematic intake of antibiotics, intravenously or orally. The formation of osteoconductive NPs with antibacterial properties may provide enhanced bone regeneration, while inhibiting bacteria growth.

Printed electronics has gained much attention due to the simple fabrication of conducting materials with flexible structure. Cu NPs tend to oxidize readily, especially in corrosive environment or under air. Anti-corrosive coatings were applied on printed Cu NPs by dip-coating. The employment of both anti-corrosive agent, benzotriazole (BTA) and commercial hydrophobic substance, trimethylsiloxysilicate (TMS), showed a superior synergic effect on the protection of printed Cu NPs in corrosive environments.

[1] Geuli O, Metoki N, Eliaz N, Mandler D. Electrochemically driven hydroxyapatite nanoparticles coating of medical implants. Adv. Funct. Mater. 2016;26:8003-10.

[2] Geuli O, Metoki N, Zada T, Reches M, Eliaz N, Mandler D. Synthesis, coating, and drug-release of hydroxyapatite nanoparticles loaded with antibiotics. J. Mater. Chem. B 2017; 5:7819-30.

[3] Thomas MB, Metoki N, Geuli O, Sharabani‐Yosef O, Zada T, Reches M, et al. Quickly manufactured, drug eluting, calcium phosphate composite coating. ChemistrySelect 2017;2:753-8.









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