利用一种解磷芽孢杆菌对聚乳酸（PLA）以及聚乳酸-g-丙烯酸（PLA-g-AA）/淀粉薄膜的生物降解特性进行表征。
Characterizing biodegradation of PLA and PLA-g-AA/starch films using a phosphate-solubilizing bacillus species.
作者信息
Wu Chin-San
机构信息
Department of Chemical and Biochemical Engineering, Kao Yuan University, Kaohsiung County, Taiwan 82101, Taiwan.
出版信息
Macromol Biosci. 2008 Jun 11;8(6):560-7. doi: 10.1002/mabi.200700181.
The use of PLA and PLA-g-AA/starch as materials for the controlled release of encapsulated PSB was evaluated. The results showed that the bacterium degraded both the PLA and the PLA-g-AA/starch composite films, resulting in cell release. Severe disruption of the film structure occurred after incubation for 60-90 d. The PLA-g-AA/starch (20 wt.-%) films were more biodegradable than those made of PLA and also suffered a more pronounced decrease in molecular weight and intrinsic viscosity. Although blending of starch appeared to enhance the biodegradability of the PLA films, the pattern of degradation was quite similar for both types of films. The rate of cell release depends on the biodegradability of the film.
评估了使用聚乳酸（PLA）和聚乳酸接枝丙烯酸（PLA-g-AA）/淀粉作为包封光合细菌（PSB）控释材料的情况。结果表明，该细菌降解了PLA和PLA-g-AA/淀粉复合膜，导致细胞释放。孵育60 - 90天后，膜结构出现严重破坏。PLA-g-AA/淀粉（20重量%）膜比PLA制成的膜更具生物降解性，并且分子量和特性粘度也有更明显的降低。尽管淀粉的共混似乎提高了PLA膜的生物降解性，但两种膜的降解模式相当相似。细胞释放速率取决于膜的生物降解性。
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