摘要
采用NaOH对聚乙交酯(polyglycolic acid,PGA)、聚丙交酯(polylactic acid,PLA)及聚乙交酯丙交酯(poly(L-lactide-co-glycolide),PGLA)纤维进行处理.将一定量的试样纤维置于温度为37℃和pH值为7.4的磷酸盐缓冲溶液(PBS)中进行3周的体外降解试验.通过测定纤维熔点、接触角、质量损失、强力损失以及纤维表面形态,对PGA,PLA及PGLA纤维碱处理后的热力学降解性能进行研究探讨.研究表明,碱处理后PLA的熔点略有升高,PGA和PGLA的熔点略有降低,3种纤维的水接触角、质量和强力减小;降解过程中PGA和PGLA的质量损失和强力损失显著,而PLA变化很小.
Polyglycolic acid （PGA）, polylactic acid （PLA） and poly （L-lactide-co-glycolide） （PGLA） were treated with NaOH. The fibers were investigated for period of 3 weeks in phosphate buffered solution（pH value is 7.4）at 37℃. The treatment and degradation were studied with regard to the melting point, contact angel, mass loss, breaking loss and surface morphology of the fibers. The experimental study showed that the melting point of PLA increased, while the melting point of PGA and PGLA decreased. The contact angel, weight and breaking strength of treated fiber decreased. During the process of degradation, weight loss and breaking loss of PGA and PGLA were significant, while PLA changed little.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第4期390-395,共6页
Journal of Donghua University(Natural Science)
基金
上海市科委资助项目(10411953300)
高等学校学科创新引智计划资助项目(B07024)
