中文摘要：

利用异丙基三（二辛基焦磷酸酰氧基）钛酸酯偶联剂改性纳米二氧化硅,采用熔融共混挤出法制备聚己内酯（PCL）/聚（3-羟基丁酸酯-co-4-羟基丁酸酯）（P（3HB-co-4HB））/改性纳米二氧化硅（nano-SiO2）复合降解材料；利用红外光谱（FIR）、万能拉力机、扫描电镜（SEM）、动态力学分析仪（DMA）等研究了改性nano-SiO2对复合材料的表面结构、力学性能等性能的影响.结果表明：改性nano-SiO2含量为4％时,复合降解材料的力学性能有明显的改善；少量添加的改性nano-SiO2可以均匀分散在PCL/P（3HB-co-4HB）基体树脂中,但当加入量过大时,容易发生团聚现象.

英文摘要：

By using isopropyl tri （dioctylpyrophosphate） titanate modified nano-SiO2 poly （ε-caprolactone）（PCL） and poly（3-hydroxylbutyrate-co-4-hydroxylbutyrate）（PHA） blends was prepared by melt mixing.Its structure and mechanical properties were studied respectively with infrared spectrometer（FT-IR）,universal material testing machine,scanning electron microscope （SEM） and dynamic mechanical analysis （DMA）.The results show that the modified nano-SiO2 content is 4 ％,the mechanical properties of composite degradation material is improved obviously.The SEM results show that a low amount of modified nano-SiO2 can be dispersed evenly in the blends,while agglomeration was observed in blends with increasing modified nano-SiO2 content.