新型n-HA增强复合生物材料的结构与性能  

STRUCTURE AND PROPERTIES OF THE NEW n-HA REINFORCED COMPOSITE BIOMATERIAL

作　　者：左奕[1] 李玉宝[1] 张翔[1] 杨维虎[1] 李吉东[1] 吕国玉[1] 牟元华[1] 

机构地区：[1]四川大学纳米生物材料研究中心

出　　处：《高分子材料科学与工程》2005年第5期212-215,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(30270399)

摘　　要：在双螺杆挤出机上制备了新型纳米羟基磷灰石增强聚酰胺66/高密度聚乙烯(n-HA/PA 66/HDPE)复合生物材料,研究了不同配比复合材料的微观结构、相界面作用对力学性能和吸水性能的影响及作用机理。分析表明,通过n-HA粒子与极性PA相界面的结合,减少了酰胺基与水分子的结合,实现了复合体系强韧性的提高和吸水率的下降。PE在PA基体中微观形态的不同导致了复合材料性能的差异,球状分布有利于材料的韧性增加,但吸水率降低很少;网状分布时,PE/PA两相间空隙较多,材料力学性能降低,但吸水率却大幅下降。A novel biomaterial was prepared by blending nano-nyaroxya （n-HA） with polyamide 66 （PA66） and high density polyethylene （HDPE）. The influence of different composition on microstructure, mechanical properties and water absorption of the composite was studied. n-HA bonding with polar PA at the interface promotes the rigidity and elasticity, decreasing the bonding of water with amide group of PA. The microstructure of PE dispersed in polyamide matrix effects the properties of composites. PE spherulites are good for mechanical properties and sustention of water absorption. Checked PE has many cavities existed at the interface of PA and PE, resulting in decrease of mechanical properties and water absorption.

关 键 词：纳米生物材料 n—HA增强PA66/HDPE 微观结构 力学性能 吸水率 

分 类 号：TB383[一般工业技术—材料科学与工程]