【摘要】 对聚β-羟基丁酸酯/聚乳酸(PHB/PLLA)及聚β-羟基丁酸酯/聚乳酸/聚氧乙烯(PHB/PLLA/PEO)膜状样品在37℃磷酸缓冲溶液(PBS)/溶菌酶中的降解行为进行了研究,通过定期观察质量损失、降解过程中的热力学性质及样品表面形态变化,发现PHB/PLLA共混未能提高PHB的降解速度,而PEO加入到PHB/PLLA体系中显著提高了PHB、PLLA的降解速度,进而提高了PHB/PLLA共混体系的降解速度。更多还原

【Abstract】 In this paper,the in virto degradation behavior of PHB/PLLA[poly(β-hydroxybutyrate)/ poly(L-lactide)] blends and PHB/PLLA/PEO [poly(β-hydroxybutyrate)/poly(L-lactide)/poly(ethylene oxide)] blends was studied by changing weight retention,thermal properties,the morphology of PHB/PLLA and PHB/PLLA/PEO patch in phosphate buffered saline(PBS)/ lysozme at 37 ℃.It was founded that the degradation rates of PHB was not affected by PLLA,whereas PEO adding to PHB/PLLA blends led to the acceleration of PHB and PLLA degradability,so the degradation rate of PHB/PLLA was accelerated.更多还原