首页> 外文期刊>Journal of Applied Polymer Science >Effect of vortex-induced physical stress on fluorescent properties of dye-containing poly(ethylene glycol)-block-poly(lactic acid) micelles
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Effect of vortex-induced physical stress on fluorescent properties of dye-containing poly(ethylene glycol)-block-poly(lactic acid) micelles

机译:涡流诱导的物理应力对含染料聚(乙二醇) - 伯 - 伯 - 聚(乳酸)胶束的荧光特性的影响

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摘要

The effect of vortex-induced mechanical stresses on the fluorescent properties of dye-containing poly(ethylene glycol)-block-poly(lactic acid) (PEG-b-PLA) block copolymer micelles has been investigated. PEG-b-PLA block copolymer micelles containing fluorescent dyes, 3,3 '-dioctadecyloxacarbocyanine perchlorate (DiO) and/or 1,1 '-dioctadecyl-3,3,3 ',3 '-tetramethylindocarbocyanine perchlorate (DiI), are prepared by a simple one-step procedure that involves the self-assembly of block copolymers and spontaneous incorporation of hydrophobic dyes into the core of the micelles. Upon vortexing, the micelle dispersion samples showed a decrease in fluorescence intensity in a rotational speed- and time-dependent manner. The results demonstrated that the vortexing can alter the fluorescent properties of the dye-containing PEG-b-PLA block copolymer micelle dispersion samples, suggesting the potential utility of block copolymer micelles as a mechanical stress-responsive nanomaterial.
机译:研究了旋涡诱导的机械应力对含染料的聚乙二醇-嵌段聚乳酸(PEG-b-PLA)嵌段共聚物胶束荧光性能的影响。含有荧光染料的PEG-b-PLA嵌段共聚物胶束,3,3'-二十八烷氧基碳菁高氯酸盐(DiO)和/或1,1'-二十八烷基-3,3,3',3'-四甲基吲哚碳菁高氯酸盐(DiI),通过简单的一步程序制备,该程序涉及嵌段共聚物的自组装和疏水染料自发并入胶束的核心。旋转后,胶束分散样品的荧光强度以转速和时间依赖的方式降低。结果表明,旋涡可以改变含染料的PEG-b-PLA嵌段共聚物胶束分散样品的荧光性质,表明嵌段共聚物胶束作为机械应力响应纳米材料的潜在用途。

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