Mineralized collagen coatings formed by electrochemical deposition.
Understanding and controlling the process of electrochemical deposition (ECD) of a mineralized collagen coating on metallic orthopedic implants is important for engineering highly bioactive coatings. In this work, the influence of different ECD parameters was investigated. The results showed that the mineralization degree of the coatings increased with deposition time, voltage potential and H2O2 addition, while chitosan addition led to weakening of mineralization, heavy mineralization resulted in a porous coating morphology. Furthermore, two typical coatings, dense and porous, were analyzed to investigate their microstructure and evaluated for their cytocompatibility; the dense coating showed better osteoblast adhesion and proliferation. Based on our understanding of how the different coating parameters influenced the coating, we proposed an ECD process in which the pH gradient near the cathode and the collagen isoelectric point were suggested to play crucial roles in controlling the mineralization and morphology of the coatings. The proposed ECD process may offer a guide for controlled deposition of a desired bioactive coating.
Department of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China.
Ting
T
Ling
Jun
J
Lin
Junjun
J
Tu
Siqian
S
Liu
Wenjian
W
Weng
Kui
K
Cheng
Huiming
H
Wang
Piyi
P
Du
Gaorong
G
Han
D016475:3T3 Cells; D000818:Animals; D002417:Cattle; D002448:Cell Adhesion; D049109:Cell Proliferation; D048271:Chitosan / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003094:Collagen / Q000737:chemistry*; D004563:Electrochemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007526:Isoelectric Point; D051379:Mice; D010006:Osteoblasts / Q000166:cytology / Q000648:ultrastructure
D020099:Coated Materials, Biocompatible; D003094:Collagen; D048271:Chitosan; D006861:Hydrogen Peroxide