title: Preparation and properties of in-situ growth of carbon nanotubes reinforced hydroxyapatite coating for carbon/carbon composites.
abstract: Carbon nanotubes (CNTs) possess excellent mechanical properties for their role playing in reinforcement as imparting strength to brittle hydroxyapatite (HA) bioceramic coating. However, there are few reports relating to the in-situ grown carbon nanotubes reinforced hydroxyapatite (CNTs-HA) coating. Here we demonstrate the potential application in reinforcing biomaterials by an attempt to use in-situ grown of CNTs strengthen HA coating, using a combined method composited of injection chemical vapor deposition (ICVD) and pulsed electrodeposition. The microstructure, phases and chemical compositions of CNTs-HA coatings were characterized by various advanced methods. The scanning electron microscopy (SEM) images indicated that CNTs-HA coatings avoided the inhomogeneous dispersion of CNTs inside HA coating. The result show that the interfacial shear strength between CNTs-HA coating and the C/C composite matrix reaches to 12.86±1.43MPa. Potenitodynamic polarization and electrochemical impedance spectroscopy (EIS) studies show that the content of CNTs affects the corrosion resistance of CNTs-HA coating. Cell culturing and simulated body fluid test elicit the biocompatibility with living cells and bioactivity of CNTs-HA coatings, respectively.
authors: State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: jlliushoujie@126.com.
authors: Shoujie
authors: S
authors: Liu
authors: State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: lihejun@nwpu.edu.cn.
authors: Hejun
authors: H
authors: Li
authors: State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: suyangyang@mail.nwpu.edu.cn.
authors: Yangyang
authors: Y
authors: Su
authors: State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: 1729299905@163.com.
authors: Qian
authors: Q
authors: Guo
authors: State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: zhangleilei@nwpu.edu.cn.
authors: Leilei
authors: L
authors: Zhang
mesh_terms: D016475:3T3 Cells; D000268:Adhesiveness; D000818:Animals; D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis* / Q000737:chemistry; D017886:Durapatite / Q000138:chemical synthesis* / Q000737:chemistry; D004563:Electrochemistry; D051379:Mice; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D013052:Spectrometry, X-Ray Emission; D013059:Spectrum Analysis, Raman; D014961:X-Ray Diffraction
chemical_list: D020099:Coated Materials, Biocompatible; D037742:Nanotubes, Carbon; D017886:Durapatite
keywords: Adhesion strength; Biocompatibility; Corrosion; Hydroxyapatite coating; In-situ growth of carbon nanotubes