聚乳酸_羟基磷灰石多孔复合材料的制备和体外降解研究.pdf

23 6 V o l. 23, N o. 6 20 11 6 Chem ica lR esea rch and A pp lication Jun. , 20 11 : 20 11) / * 姜小婷, 王 倩, 张普敦 , 100029) : - / PLLA /HA ) , SEM ) - ATRFT IR ) HA , 100 / 10100 / 20100 / 30100 /40 100 / 50 PLLA /HA 98105 919 177 ATRFT IR , 100 / 30100 /40 100/ 50 , 67 65 52 ; 100/ 20 100 / 10 : ; ; ; : O 6331 : A P reparation of porous polylactide /hydroxyapatite com posites and their in vitro degradation * JIANG X iaoT ing, WANG Q ian, ZHANG PuDun Schoo l o f Sc ience, Beijing U niversity of Chem ical T echno logy, Be ijing 100029, China) A bstrac t: Po lyLlac tide / hydroxyapa tite PLLA /HA ) composites w ith high po rosity w e re prepared u sing so lventcasting / saltleac h ing m ethodT he effec ts o f HA contents on the mo rpho logy and the in v itro degradation behav ior of the asprepared samp les w e re stud ied u sing scann ing e lec tron m icroscopy SEM ) and a ttenuated to tal reflectanceFour ier transform infrared spectro scopy ATRFT IR ) O ur resu lts show tha t the tho rough degrada tion tmi e for PLLA /HA composites w ith the w eight ratio o f 100 / 10, 100 / 20, 100 / 30, 100 /40 and 100 / 50 are respec tive ly 98, 105, 91, 91 and 77 daysThe degrada tion process for the composites w ith a ra