摘要
采用放电等离子烧结(SPS)法,在烧结温度为1200℃,压力从20MPa到60MPa的条件下,以聚碳硅烷(PCS)为结合剂,制备出一种新型的大块多壁碳纳米管(MWCNTs)。用SEM和TEM进行观察。结果表明,烧结后材料的纳米级结构仍被保留;XRD分析显示,纳米管通过聚碳硅烷热解的SiC纳米晶相互粘结;随着PCS含量的增加及烧结压力的升高,材料的密度和维氏硬度增加,比表面积减少。动物试验表明,CNTs/PCS材料的炎性反应随着PCS含量增加有轻度增加;通过此种方法制备的碳纳米管,物理性能接近于骨组织,且具有较好的生物相容性,是适宜的候选牙用种植体材料。
A novel bulk muhi-wall carbon nanotubes （MWCNTs） sintered with polycarbosilane （PCS）as a binder agent was fabricated by spark plasma sintering （SPS）, and their microstructure and properties were investigated. Sintering was done with the pressure in the range of 20～60 MPa at 1 200℃. SEM and TEM observations showed that the nano-sized tube microstructure was preserved even after sintering and tubes were adhered each other with the nano-nodules of SiC pyrolyzed form PCS as revealed by X-ray diffraction. The bulk density and Vickers hardness were increased and the specific surface area was reduced with increasing the content of PCS and sintering pressure. The inflammatory reaction of CNTs/PCS material was slightly increased with the increase of PCS content in the animal experiment.Sintered CNTs with the physical and mechanical properties close to bone and good biocompatibility from tissue response would be suitable as a candidate implant dental materials in the future.
出处
《稀有金属快报》
CSCD
2006年第1期22-28,共7页
Rare Metals Letters
