纳米碳管/羟基磷灰石复合材料的凝胶注模  

Gel-casting process of carbon nanotubes/hydroxyapatite composite materials

作　　者：于志云[1] 孙康宁[1] 孙晓宁[1] 李爱民[1] 

机构地区：[1]山东大学液态结构及其遗传性教育部重点实验室

出　　处：《复合材料学报》2006年第4期41-46,共6页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(30170269)

摘　　要：采用凝胶浇注成型工艺制备了纳米碳管／羟基磷灰石复合材料坯体。研究了pH值、分散剂、固相含量（纳米碳管和羟基磷灰石在料浆中的质量分数）、分散工艺等因素对料浆和复合材料坯体性能的影响，对坯体的力学性能进行了测试，借助扫描电镜分析了坯体的微观组织。实验发现，料浆的pH值应控制在10～12的范围内；聚甲基丙烯酸铵的浓度为0．6％时，羟基磷灰石悬浮体流动性最好；十二烷基磺酸钠的浓度在SDS／CNTs=1％～2％时，纳米碳管／羟基磷灰石复相料浆的粘度最低；采用球磨法制备的复相料浆固相含量达到55％，复合材料坯体的抗弯强度达到57．403MPa。The green bodies of carbon nanotubes/hydroxyapatite （CNTs/HA） composite were prepared by gelcasting process. The effects of pH, dispersant, content of solid in slurry and the dispersing process on the slurry and the properties of the green bodies were researched. The mechanical properties were tested, and the microstructure was analysed using SEM. It is found that the pH value of the slurry should be controlled in the range 10 to 12. The fluidness of HA slurry is the best as the concentration of NH4-PMAA is 0.6%. The viscosity of CNTs/HA slurry reaches the lowest value as the concentration of sodium dodecanesulpbonate which is called SDS for short changes from SDS/CNTs= 1% to SDS/CNTs=2%. The content of solid in CNTs/HA slurry reaches 55% and the bending strength of the green bodies of CNTs/HA composite reaches 57. 403 MPa by a ball mill process.

关 键 词：纳米碳管 羟基磷灰石 复合材料 凝胶浇注 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ174[化学工程—陶瓷工业]