Controlling block copolymer phase behavior using ionic surfactant

Journal Article · Mon May 23 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4947646· OSTI ID:22606251

Ray, D.; Aswal, V. K. ^[1]

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1. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India E-mail: [e-mail] (India)

The phase behavior of poly(ethylene oxide)-poly(propylene oxide-poly(ethylene oxide) PEO-PPO-PEO triblock copolymer [P85 (EO{sub 26}PO{sub 39}EO{sub 26})] 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.

• OSTI ID: 22606251
• Journal Information: AIP Conference Proceedings, Vol. 1731, Issue 1; Conference: DAE solid state physics symposium 2015, Uttar Pradesh (India), 21-25 Dec 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AQUEOUS SOLUTIONS
COPOLYMERS
ETHYLENE
LIGHT SCATTERING
MICELLAR SYSTEMS
NANOPARTICLES
NEUTRON DIFFRACTION
NEUTRONS
OXIDES
PLASMA SWITCHES
POLYETHYLENE GLYCOLS
PROPYLENE
SMALL ANGLE SCATTERING
SODIUM
SPHERICAL CONFIGURATION
SULFATES
SURFACTANTS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K