Zhou Keqing, Gao Rui, Jiang Saihua
Faculty of Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, Hubei 430074, PR China.
Faculty of Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, Hubei 430074, PR China.
J Colloid Interface Sci. 2017 Jun 15;496:334-342. doi: 10.1016/j.jcis.2017.02.038. Epub 2017 Feb 16.
In this work, hydroxyapatite (HAP) nanorods decorated on graphene nanosheets (HAP-Gs) was synthesized by a hydrothermal method. The structure, elemental composition and morphology of the HAP-Gs hybrids were characterized by X-ray diffraction, Fourier transform infrared and Transmission electron microscopy. Subsequently, the hybrids were incorporated into poly (ε-caprolactone) (PCL) via a solution blending method. Optical images and scanning electron microscopy observation revealed not only a well dispersion of HAP-Gs hybrids but also a strong interfacial interaction between hybrids and PCL matrix. The influence of HAP-Gs hybrids on the crystallization behavior, crystal structure, thermal stability, mechanical properties and biocompatibility of the PCL nanocomposites was investigated in detail. The results showed that the crystallization temperature of PCL was enhanced obviously, but the crystal structure was not affected by the incorporation of HAP-Gs hybrids. The mechanical properties of PCL bionanocomposites were improved obviously.
在本工作中，通过水热法合成了装饰在石墨烯纳米片上的羟基磷灰石（HAP）纳米棒（HAP-Gs）。采用X射线衍射、傅里叶变换红外光谱和透射电子显微镜对HAP-Gs杂化物的结构、元素组成和形态进行了表征。随后，通过溶液共混法将杂化物掺入聚（ε-己内酯）（PCL）中。光学图像和扫描电子显微镜观察表明，HAP-Gs杂化物不仅分散良好，而且杂化物与PCL基体之间存在强烈的界面相互作用。详细研究了HAP-Gs杂化物对PCL纳米复合材料的结晶行为、晶体结构、热稳定性、力学性能和生物相容性的影响。结果表明，PCL的结晶温度明显提高，但晶体结构不受HAP-Gs杂化物掺入的影响。PCL生物纳米复合材料的力学性能明显改善。
