Wormlike core–shell nanoparticles formed by co-assembly of double hydrophilic block polyelectrolyte with oppositely charged fluorosurfactant
Wormlike core–shell nanoparticles formed by co-assembly of double hydrophilic block polyelectrolyte with oppositely charged fluorosurfactant
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双亲水嵌段聚电解质与带相反电荷的含氟表面活性剂共组装形成蠕虫状核壳纳米粒子
DOI：
10.1039/c2sm25588j
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发表时间：
2012
期刊：
影响因子：
3.4
通讯作者：
S. Pispas
中科院分区：
文献类型：
--
作者：
M. Štěpánek;Juraj Škvarla;Mariusz Uchman;K. Procházka;B. Angelov;L. Kováčik;V. Garamus;C. Mantzaridis;S. Pispas
在阴离子表面活性剂、聚电解质和表面活性剂之间形成聚电解质-表面活性剂复合物（PE-S）。（2-氨基磺酸钠-3-羧酸异戊二烯）-嵌段-聚（环氧乙烷）（PSCI-PEO）和阳离子含氟表面活性剂，N-用静态法研究了氯化（3，3，4，4，5，5，6，6，7，7，8，8，9，9，10，10，10-十七烷基）吡啶（HFDPCl）在碱性水溶液中的性质，动态和电泳光散射。用小角X射线散射、低温透射电子显微镜和原子力显微镜研究了PE-S纳米粒子的结构。结果表明，含氟表面活性剂形成细长线状胶束的趋势驱动PE-S共组装体形成具有PE-S核和PEO嵌段壳的柔性核-壳圆柱形形态。与涉及双亲水性聚电解质的其他PE-S系统不同，定义明确的核-壳颗粒仅存在于对应于聚集体的零电势的HFDPCl与PSCI单元化学计量比的窄范围内。
Formation of polyelectrolyte–surfactant complexes (PE–S) between an anionic polyelectrolyte, poly(sodium 2-sulfamate-3-carboxylate isoprene)-block-poly(ethylene oxide) (PSCI-PEO) and a cationic fluorosurfactant, N-(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl) pyridinium chloride (HFDPCl) was studied in alkaline aqueous solutions by static, dynamic and electrophoretic light scattering. The structure of the formed PE–S nanoparticles was investigated by SAXS, cryogenic transmission electron microscopy and atomic force microscopy. The results show that the tendency of the fluorosurfactant to form elongated threadlike micelles drives the PE–S co-assembly to a flexible core–shell cylindrical morphology with the core of the PE–S and the shell of the PEO blocks. Unlike other PE–S systems involving double hydrophilic polyelectrolytes, well-defined core–shell particles exist only in the narrow range of HFDPCl-to-PSCI unit stoichiometric ratios corresponding to zero ζ-potential of the aggregates.