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/PA66/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.
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