Abstract A series of polylactic acid/hydroxyapatite/graphene oxide composite (PLA/HA/GO) were fabricated via solution blending and casting method using N,N-dimethyl-formamide (DMF) and CH2Cl2 as mutual solvents. The physicochemical properties of the resulting composites were characterized by means of FT-IR, SEM, TEM, Raman spectra, XRD and N2-physisorption. Particularly, the thermal stabilities, hydrophobic and mechanical properties of PLA/HA/GO composites were systematically investigated. The influences of GO content on thermal stabilities, hydrophobic and mechanical properties of the composites were also evaluated. The results showed that the addition of GO and HA not only improved the thermal stability of PLA, but also improved the hydrophobic property of PLA-based composites. By compared with the PLA/HA/GO composite, the tensile strength of pristine PLA is slight high. The tensile strength and hardness of PLA/HA/GO composites increased with the increase of GO content. The obtained PLA/HA/GO composite may be a promising material for load-bearing orthopedic implants.

中文翻译：

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聚乳酸/羟基磷灰石/氧化石墨烯复合材料的制备及其热稳定性、疏水性和机械性能

摘要 以N,N-二甲基甲酰胺（DMF）和CH2Cl2为互溶剂，通过溶液共混和浇铸法制备了一系列聚乳酸/羟基磷灰石/氧化石墨烯复合材料（PLA/HA/GO）。所得复合材料的理化性质通过 FT-IR、SEM、TEM、拉曼光谱、XRD 和 N2 物理吸附进行表征。特别是，系统地研究了 PLA/HA/GO 复合材料的热稳定性、疏水性和机械性能。还评估了GO含量对复合材料的热稳定性、疏水性和机械性能的影响。结果表明，GO和HA的加入不仅提高了PLA的热稳定性，而且提高了PLA基复合材料的疏水性能。与PLA/HA/GO复合材料相比，原始PLA的拉伸强度略高。PLA/HA/GO 复合材料的拉伸强度和硬度随着 GO 含量的增加而增加。获得的 PLA/HA/GO 复合材料可能是一种有前途的承载骨科植入物的材料。