不同分散剂制备的石墨烯纳米片/双相磷酸钙生物复合材料及其力学性能研究  

Microstructure and Mechanical Properties of Biphasic Calcium Phosphate Composites Toughened by Graphene Nanoplate with Different Dispersant

作　　者：赵琰[1] 毕见强[1] 程福明[1] 刘毅[1] 孙康宁[1] 

机构地区：[1]山东大学材料液固结构演变与加工教育部重点实验室,山东省工程陶瓷重点实验室,济南250061

出　　处：《人工晶体学报》2013年第5期927-932,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(81171463)

摘　　要：以石墨烯纳米片(GNPs)为强韧相,双相磷酸钙(BCP)为基体,采用不同的分散剂,通过热压烧结制备一种力学性能优良的骨组织替代材料。主要研究不同分散剂和GNPs对复合材料的力学性能、物相组成和微观结构的影响。结果表明,添加十六烷基三甲基溴化铵(CTAB)作为分散剂时,由于表面正负电荷吸引,BCP粉体均匀包覆到GNPs的表面,可使GNPs达到较好的分散效果。当GNPs添加量为1.5wt%时,复合材料的弯曲强度和断裂韧性分别达到152 MPa和1.74 MPa.m1/2,与相同条件下制备的纯BCP陶瓷相比,分别提高了55%和76%,表明GNPs对BCP陶瓷具有明显的补强增韧的作用。Biphasic calcium phosphate(BCP) composites reinforced by graphene nanoplatelets(GNPs) were prepared by hot pressing with different dispersant.Based on in-depth mechanical test and observation of microstructure,the influence of dispersant and GNPs on BCP matrix was investigated.When cetyltrimethylammonium bromide(CTAB) was employed as the dispersant,the BCP nanopowders can be attracted to the GNPs surface owing to electrostatic interaction.The composite containing 1.5wt% GNPs exhibited the maximun bending strength and fracture toughness of 152 MPa and 1.74 MPa·m1/2,about 55% and 76% higher than those of monolithic BCP,respectively.The addition of GNPs in BCP ceramics produce obvious strengthening and toughening effect.

关 键 词：双相磷酸钙 石墨烯纳米片 分散 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]