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Proceeding Paper

Natural Coatings on Titanium Surfaces to Improve Their Biological Response †

Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
Innovation Center Iceland, 112 Reykjavík, Iceland
Faculdade de Odontologia de Ribeirão Preto, University of Sao Paulo, 14025-190 São Paulo, Brazil
Genis hf., Aðalgata 34, 580 Siglufjörður, Iceland
Dipartimento di Scienze della Sanità Pubblica e Pediatriche—Sezione di Microbiologia, Università di Torino, 10124 Torino, Italy
Dipartimento di Scienze della Salute, Università del Piemonte Orientale, 13100 Vercelli, Italy
CNR-IPCB, Naples, 80125 Naples, Italy
CNR-STIIMA Biella, 13900 Biella, Italy
CNR-IMAMOTER, 10135 Torino, Italy
Author to whom correspondence should be addressed.
Presented at the 2nd Coatings and Interfaces Web Conference, 15–31 May 2020; Available online:
Mater. Proc. 2020, 2(1), 18;
Published: 14 May 2020
(This article belongs to the Proceedings of 2nd Coatings and Interfaces Web Conference (CIWC-2 2020))
Biomolecules and extracts from natural products are gaining increasing interest due to their beneficial properties for human health, low toxicity, environmental compatibility and sustainability. In this work, keratin, chitosan and peppermint essential oil have been used for the preparation of coatings on titanium substrates for biomedical implants/devices. All these coatings were obtained from local natural products/byproducts: keratin from discarded wool, chitosan from shrimp shells and peppermint essential oils from a local production. The above cited molecules were selected for their ability to stimulate soft tissue adhesion (keratin), anti-inflammatory activity (chitosan) and antibacterial activity (keratin after metal ion doping, chitosan and mint oil). The coatings were characterized by means of SEM-EDS, FTIR, zeta potential, wettability, tape and scratch tests, and cell and bacteria cultures. The coatings were successfully obtained for all the considered natural substances with good adhesion to the titanium substrates. All the coatings are chemically stable in water and the continuous coatings are mechanically resistant and protective for the metallic substrates. The keratin coatings are hydrophilic while the mint oil and chitosan coatings are hydrophobic; nanofibers, instead of continuous coatings, behave as more hydrophobic. At the physiological pH, the keratin and mint oil coatings are negatively charged when in contact with an aqueous environment, while the chitosan ones are positively charged. The oriented keratin fibers are able to drive fibroblast alignment. The Ag-doped keratin fibers and mint coating show antibacterial properties.
Keywords: titanium; keratin; chitosan; peppermint essential oil; coating titanium; keratin; chitosan; peppermint essential oil; coating
MDPI and ACS Style

Ferraris, S.; Verné, E.; Örlygsson, G.; Tambasco, P.; Sehn, F.P.; Ng, C.-H.; Janusson, H.; Banche, G.; Allizond, V.; Bertea, C.M.; Rimondini, L.; Cochis, A.; Guarino, V.; Varesano, A.; Vineis, C.; Confiengo, G.G.d.; Spriano, S. Natural Coatings on Titanium Surfaces to Improve Their Biological Response. Mater. Proc. 2020, 2, 18.

AMA Style

Ferraris S, Verné E, Örlygsson G, Tambasco P, Sehn FP, Ng C-H, Janusson H, Banche G, Allizond V, Bertea CM, Rimondini L, Cochis A, Guarino V, Varesano A, Vineis C, Confiengo GGd, Spriano S. Natural Coatings on Titanium Surfaces to Improve Their Biological Response. Materials Proceedings. 2020; 2(1):18.

Chicago/Turabian Style

Ferraris, Sara, Enrica Verné, Gissur Örlygsson, Paulo Tambasco, Felipe Perraro Sehn, Chuen-How Ng, Hilmar Janusson, Giuliana Banche, Valeria Allizond, Cinzia Margherita Bertea, Lia Rimondini, Andrea Cochis, Vincenzo Guarino, Alessio Varesano, Claudia Vineis, Giovanna Gautier di Confiengo, and Silvia Spriano. 2020. "Natural Coatings on Titanium Surfaces to Improve Their Biological Response" Materials Proceedings 2, no. 1: 18.

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