作　　者： (陈婷婷）; (崔海坡）; (宋成利）; (唐源敏）;

机构地区： 上海理工大学,教育部微创医疗器械工程中心,上海200093

出　　处： 《机械工程材料》 2017年第8期40-43,共4页

摘　　要： 利用双螺杆挤出机制备了纳米羟基磷灰石(n-HA)质量分数分别为10%,20%,30%,40%的n-HA/PLA(聚乳酸)复合材料,研究了复合材料中n-HA的分散性以及n-HA含量对复合材料热学性能、黏度和弯曲强度的影响。结果表明:当n-HA质量分数在10%~40%时,n-HA在PLA基体中均具有较好的分散性;随着n-HA含量的增加,n-HA/PLA复合材料的冷结晶温度及特性黏度降低,而冷结晶焓和弯曲强度则均先升高后下降;当n-HA质量分数为10%时,n-HA/PLA复合材料的综合性能较好,其弯曲强度最大,为97.2 MPa,n-HA对PLA分子链的破坏程度最小。 The nano-hydroxyapatite（n-HA）/polylactic acid（PLA）composites,with n-HA mass fractions of 10%,20%,30% and 40%,respectively,were prepared using a twin-screw extruder.The dispersion of n-HA in the composite and the influence of n-HA content on the thermal property,viscosity and bending strength of the composite were researched.The results show that the n-HA with mass fractions of 10%-40% all dispersed relatively well in the PLA matrix.With the increase of n-HA content,the cold crystallization temperature and intrinsic viscosity of the n-HA/PLA composite decreased while the cold crystallization enthalpy and bending strength first increased and then decreased.When the mass fraction of n-HA was 10%,the n-HA/PLA composite had a good comprehensive performance,namely that the bending strength reached the largest value of 97.2 MPa and the damage degree of PLA molecular chain by n-HA was minimal.

关 键 词： 聚乳酸 纳米羟基磷灰石 双螺杆挤出法 性能