Role of Polymer Segment-Particle Surface Interactions in Controlling Nanoparticle Dispersions in Concentrated Polymer Solutions

Journal Article · Wed Sep 24 00:00:00 EDT 2014 · Langmuir

DOI:https://doi.org/10.1021/la201704u· OSTI ID:1023690

Kim, So Youn; Zukoski, Charles F. ^[1]

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1. UIUC

The microstructure of particles suspended in concentrated polymer solutions is examined with small-angle X-ray scattering and small-angle neutron scattering. Of interest are changes to long wavelength particle density fluctuations in ternary mixtures of silica nanoparticles suspended in concentrated solutions of poly(ethylene glycol). The results are understood in terms of application of the pseudo-two-component polymer reference interaction site model (PRISM) theory modified to account for solvent addition via effective contact strength of interfacial attraction, ε_pc, in an implicit manner. The combined experimental-theoretical study emphasizes the complex interactions between solvent, polymer, and particle surface that control particle miscibility but also demonstrate that these factors can all be understood in terms of variations of ε_pc.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: NSFDOE - BASIC ENERGY SCIENCESNIST
• OSTI ID: 1023690
• Journal Information: Langmuir, Vol. 27, Issue (17) ; 09, 2011; ISSN 0743-7463
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CONTROL
DENSITY
DISPERSIONS
FLUCTUATIONS
INTERACTIONS
MICROSTRUCTURE
MIXTURES
NEUTRON DIFFRACTION
PARTICLES
POLYMERS
POLYETHYLENE GLYCOLS
SMALL ANGLE SCATTERING
SILICA
SOLUBILITY
SOLUTIONS
SOLVENTS
SUSPENSIONS
SURFACES
VARIATIONS
WAVELENGTHS
X-RAY DIFFRACTION