超声辅助湿法合成纳米HA及MWNT/HA复合材料

1.
Institute of Carbon Fiber and Composites,Beijing University of Chemical Technology, Beijing 100029,China; 2.Second Subsidiary Hospital of Tsinghua University, Beijing 100039,China; 3.Mouth Cavity Medical College of Beijing University, Beijing 100081,China

摘要: 以Ca(NO3)2·4H2O、(NH4)2HPO4和NH3·H2O为原料，在超声波辅助下，湿法合成了羟基磷灰石，用FTIR、XRD和TEM对产物进行了分析，结果表明：合成的羟基磷灰石为纳米级纺缍状晶体，不用烧结即具有较高晶化度，且为单一的羟基磷灰石晶相。以此制备条件为基础，采用原位合成的方法制备了多壁碳纳米管/羟基磷灰石复合材料，FTIR、XRD和TEM的分析结果表明：碳纳米管能较好的分散于羟基磷灰石基体中，部分碳纳米管表面可被反应生成的羟基磷灰石所包覆，二者之间有着较好的相容性，可作为一种新型的生物复合材料应用。
- 纳米羟基磷灰石，MWNT/HA复合材料，超声波，原位合成
Abstract: Hydroxyapatite (HA) or MWNT/HA was synthesized by reacting Ca(NO3)2·4H2O with (NH4)2HPO4 with the help of ultrasonic agitation in the absence or presence of MWNTs, and the resulting HA and MWNT/HA were characterized by IR, XRD and TEM. Results indicated that HA samples were almost completely composed of nano-sized spindle-like HA crystals, which were all of the same crystal phase and high crystallinity without agglomeration. Under optimized reaction parameters for HA crystals, the MWNTs were well dispersed in the HA matrix and some HA even deposited onto the MWNT surfaces and coated them, indicating a good compatibility between HA and MWNTs.
- Nano-HA,MWNT/HA composites,Ultrasonic,In-situ synthesis