材料科学
石墨烯
生物相容性
复合材料
拉曼光谱
傅里叶变换红外光谱
复合数
氧化物
陶瓷
扫描电子显微镜
纳米复合材料
化学工程
纳米技术
冶金
工程类
物理
光学
作者
S. Baradaran,Ehsan Moghaddam,Wan Jeffrey Basirun,Mehdi Mehrali,M. Sookhakian,M. Hamdi,Milad Rahimi Moghaddam,Yatimah Alias
出处
期刊:Carbon
[Elsevier]
日期:2014-04-01
卷期号:69: 32-45
被引量:289
标识
DOI:10.1016/j.carbon.2013.11.054
摘要
As a result of the growing interest in the biological and mechanical performance of hydroxyapatite (HA)–graphene nano-sheets (GNs) composite systems, reduced graphene oxide (rGO) reinforced hydroxyapatite nano-tube (nHA) composites were synthesized in situ using a simple hydrothermal method in a mixed solvent system of ethylene glycol (EG), N,N-dimethylformamide (DMF) and water, without using any of the typical reducing agents. The consolidation process was performed by hot isostatic pressing (HIP) at 1150 °C and 160 MPa. The composites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy, enabling confirmation of the synthesis and reduction of the nHA and rGO, respectively. The structure of the synthesized powder and cell attachment on the sintered sample was confirmed by field emission scanning electron microscopy (FESEM). The effects of the rGO on the mechanical properties and the in vitro biocompatibility of the nHA based ceramic composites were investigated. The elastic modulus and fracture toughness of the sintered samples increased with the increase of the rGO content when compared to the pure nHA by 86% and 40%, respectively. Cell culture and viability test results showed that the addition of the rGO promotes osteoblast adhesion and proliferation, thereby increasing the biocompatibility of the nHA–rGO composite.
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