CAJ | 학술논문

采用溶液共混、超声振荡的方法制备了聚乳酸/羟基磷灰石（ PLA/HA）复合材料，采用扫描电镜、红外光谱对PLA/HA复合材料进行了表征，研究了PLA/HA复合材料的力学性能、亲水性能、热稳定性以及降解性能。结果表明，HA颗粒均匀分散在PLA基体中，没有团聚现象发生；与纯PLA比较，PLA/HA复合材料的弯曲强度提高了7.9 MPa，拉伸强度下降不明显；由于HA的加入，提高了PLA/HA复合材料热稳定性，亲水性能也有所改善；降解过程中，PLA/HA复合材料中的HA颗粒能够中和PLA部分酸性代谢产物，降低了材料自催化效应及产生速度，减缓了材料重量损失速度，前6周的重量损失小于1%，在第12周的最终重量损失为5.8%，降解后期的重量损失比纯PLA材料低3%~4%。
채용용액공혼、초성진탕적방법제비료취유산/간기린회석（ PLA/HA）복합재료，채용소묘전경、홍외광보대PLA/HA복합재료진행료표정，연구료PLA/HA복합재료적역학성능、친수성능、열은정성이급강해성능。결과표명，HA과립균균분산재PLA기체중，몰유단취현상발생；여순PLA비교，PLA/HA복합재료적만곡강도제고료7.9 MPa，랍신강도하강불명현；유우HA적가입，제고료PLA/HA복합재료열은정성，친수성능야유소개선；강해과정중，PLA/HA복합재료중적HA과립능구중화PLA부분산성대사산물，강저료재료자최화효응급산생속도，감완료재료중량손실속도，전6주적중량손실소우1%，재제12주적최종중량손실위5.8%，강해후기적중량손실비순PLA재료저3%~4%。
The PLA/HA composites were prepared via solution blending and ultrasonic oscillation. The materials were characterized by SEM and IR. The performance of the PLA/HA composites,such as me-chanical properties,hydrophilicity,thermal stability and degradation were studied. The results show that:the HA particles are uniformly dispersed in PLA matrix,there is no agglomeration;Compared with the pure PLA materials,the bending strength of PLA/HA composites are increased 7. 9 MPa,and the decline of the tensile strength of the composite is not obvious;The hydrophilic properties and thermo stability of the PLA/HA composites are improved because of the addition of HA particles. Certain amount acid of me-tabolites of PLA were neutralized by HA particles in PLA/HA composites during the process of degrada-tion,so self-catalysis effect and speed of the materials are reduced,pH value is improved,and weight loss rate of the materials is slow down. The mass loss of the composites was less than 1% during the initial 6 weeks,and the final mass loss was 5. 8% at the 12th week. The mass loss of the composite was smaller than that of pure PLA materials by about 3% ~4%in the mid-later period of degradation.