动态光散射
共聚物
胶束
聚丁二烯
荧光光谱法
材料科学
临界胶束浓度
水溶液
荧光
芘
高分子化学
两亲性
化学
分析化学(期刊)
聚合物
色谱法
有机化学
纳米颗粒
纳米技术
光学
物理
作者
Önder Topel,Burçin Acar Çakır,Leyla Budama,Numan Hoda
标识
DOI:10.1016/j.molliq.2012.10.013
摘要
In this study, critical micelle concentration (cmc) was determined for polybutadiene-block-poly(ethyleneoxide), PB(1800)-b-PEO(4000) amphiphilic diblock copolymer in aqueous media by fluorescence spectroscopy and dynamic light scattering (DLS) techniques. The fluorescence measurements were performed by using pyrene as a probe molecule in order to determine the cmc while the intensity of the scattered light from solutions was analyzed with the DLS technique. The cmc values determined by these two techniques for PB(1800)-b-PEO(4000) copolymer in aqueous solution at 25 °C were 3 ± 1 × 10− 7 and 6 ± 2 × 10− 7 mol/L, respectively. The results showed that DLS is as sensitive as fluorescence spectroscopy in determining the cmc of a copolymer, and that it is also capable of the simultaneous determination of cmc and hydrodynamic diameter of micelles in a copolymer micellar solution.
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