cross-linked micelles reaching encapsulation efficiency as much as 91.9%. No release of the encapsulated diuron was detected without light, whereas a release rate as high as 96.8% over 8h at pH 7.0 buffer was observed under solar stimulated irradiation, indicating that the cross-linked micelles may be used as a photo-controlled sustained release carrier for the delivery of photosynthetic inhibitor.
合成了具有光不稳定的2-硝基苄基侧基的两亲性
羧甲基壳聚糖共轭物(
NBS-
CMCS),在
水性条件下,通过滴加二醛形成交联结构,可以自组装成聚合物胶束。
TEM和(1)H NMR证实,交联的胶束具有核-壳构型,平均直径为140±5.5nm。DLS和
TEM观察表明,交联的胶束在pH 7.0的
水溶液中稳定,无光照射,而暴露于365 nm的紫外线下,它们可以转移到纳米胶囊中。Diuron是一种光合
抑制剂,被包封在交联的胶束中,包封效率高达91.9%。没有光照,没有检测到包封的杜伦的释放,而释放速率高达96。