Controlling Block Copolymer Phase Behavior Using Ionic Surfactant

被引：1

作者：

Ray, D. ^{[1
]}

Aswal, V. K. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India

来源：

DAE SOLID STATE PHYSICS SYMPOSIUM 2015 | 2016年 / 1731卷

关键词：

Block copolymer; surfactant; phase behavior; small-angle neutron scattering; SCATTERING;

D O I：

10.1063/1.4947646

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The phase behavior of poly(ethylene oxide)-poly(propylene oxide-poly(ethylene oxide) PEO-PPO-PEO triblock copolymer [P85 (EO26PO39EO26)] in presence of anionic surfactant sodium dodecyl sulfate (SDS) in aqueous solution as a function of temperature has been studied using dynamic light scattering (DLS) and small-angle neutron scattering (SANS). The measurements have been carried out for fixed concentrations (1 wt%) of block copolymer and surfactants. Each of the individual components (block copolymer and surfactant) and the nanoparticle-surfactant mixed system have been examined at varying temperature. The block copolymer P85 forms spherical micelles at room temperature whereas shows sphere-to-rod like micelle transition at higher temperatures. On the other hand, SDS surfactant forms ellipsoidal micelles over a wide temperature range. Interestingly, it is found that phase behavior of mixed micellar system (P85 + SDS) as a function of temperature is drastically different from that of P85, giving the control over the temperature-dependent phase behavior of block copolymers.

引用

页数：3

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