DOI > 10.5291/ILL-DATA.9-12-478

This proposal is publicly available since 11/17/2021


Surfactant-induced charging of polydimethylsiloxane-poly(methyl methacrylate) latexes in nonpolar solvents


Sterically-stabilized poly(methyl methacrylate) (PMMA) latexes charged by Aerosol OT (AOT) in nonpolar solvents are a well-characterized model system to understand the nature of charge in low dielectric fluids. Despite being well-studied, the latexes have typically only been produced using one steric stabilizer, poly(12-hydroxystearic acid) (PHSA). Polydimethylsiloxane (PDMS) has emerged as an effective replacement for PHSA, with highly beneficial properties compared to PHSA: it is commercially available and can be reproducibly and controllably synthesized. The native charging behavior of these PDMS-stabilized particles, both in pure solvent and with added AOT, however, is different to PHSA-stabilized particles, which are typically uncharged in low dielectric solvents. Additionally, the magnitude of the particle charge can be modified by the addition of ethylene glycol dimethacrylate (EGDMA) crosslinker. We propose using contrast-variation small-angle neutron scattering (CV-SANS) with appropriate selective deuteration (to the surfactant and polymer) to study the distribution of crosslinker and AOT surfactant within PDMS-stabilized latexes.

Experimental Report

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Data Citation

The recommended format for citing this dataset in a research publication is in the following format:

Gregory N. Smith; EASTOE Julian; GRILLO Isabelle; HALLETT James; Jocelyn Peach and PEGG Jonathan. (2016). Surfactant-induced charging of polydimethylsiloxane-poly(methyl methacrylate) latexes in nonpolar solvents. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-478

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Experiment Parameters

  • Environment temperature

    298K only
  • Experiment moment

    1.510^-3<Q<0.5 ^

Sample Parameters

  • Formula

    • n-dodecane (h and d) solvent backgrounds
    • PDMS-PMMA dispersions in n-dodecane
    • deuterated AOT solutions