Electrolyte-induced Instability of Colloidal Dispersions in Nonpolar Solvents

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Electrolyte-induced Instability of Colloidal Dispersions in Nonpolar Solvents. / Smith, Gregory N.; Finlayson, Samuel D.; Rogers, Sarah E.; Bartlett, Paul; Eastoe, Julian.

I: The Journal of Physical Chemistry Letters, Bind 8, Nr. 19, 30.08.2017, s. 4668-4672.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Smith, GN, Finlayson, SD, Rogers, SE, Bartlett, P & Eastoe, J 2017, 'Electrolyte-induced Instability of Colloidal Dispersions in Nonpolar Solvents', The Journal of Physical Chemistry Letters, bind 8, nr. 19, s. 4668-4672. https://doi.org/10.1021/acs.jpclett.7b01685

APA

Smith, G. N., Finlayson, S. D., Rogers, S. E., Bartlett, P., & Eastoe, J. (2017). Electrolyte-induced Instability of Colloidal Dispersions in Nonpolar Solvents. The Journal of Physical Chemistry Letters, 8(19), 4668-4672. https://doi.org/10.1021/acs.jpclett.7b01685

Vancouver

Smith GN, Finlayson SD, Rogers SE, Bartlett P, Eastoe J. Electrolyte-induced Instability of Colloidal Dispersions in Nonpolar Solvents. The Journal of Physical Chemistry Letters. 2017 aug. 30;8(19):4668-4672. https://doi.org/10.1021/acs.jpclett.7b01685

Author

Smith, Gregory N. ; Finlayson, Samuel D. ; Rogers, Sarah E. ; Bartlett, Paul ; Eastoe, Julian. / Electrolyte-induced Instability of Colloidal Dispersions in Nonpolar Solvents. I: The Journal of Physical Chemistry Letters. 2017 ; Bind 8, Nr. 19. s. 4668-4672.

Bibtex

@article{a8cd0c27a4d0452dbe03314ca662923f,
title = "Electrolyte-induced Instability of Colloidal Dispersions in Nonpolar Solvents",
abstract = "Dispersions of poly(methyl methacrylate) (PMMA) latexes were prepared in a low dielectric, nonpolar solvent (dodecane) both with and without the oil-soluble electrolyte, tetradodecylammonium-tetrakis(3,5-bis(trifluoromethyl)phenyl)borate. For dispersions with a high concentration of background electrolyte, the latexes become colloidally unstable and sediment in a short period of time (<1 h). This is completely reversible upon dilution. Instability of the dispersions is due to an apparent attraction between the colloids, directly observed using optical tweezers by bringing optically trapped particles into close proximity. Simple explanations generally used by colloid scientists to explain loss of stability (charge screening or stabilizer collapse) are insufficient to explain this observation. This unexpected interaction seems, therefore, to be a consequence of the materials that can be dispersed in low dielectric media and is expected to have ramifications for studying colloids in such solvents.",
author = "Smith, {Gregory N.} and Finlayson, {Samuel D.} and Rogers, {Sarah E.} and Paul Bartlett and Julian Eastoe",
year = "2017",
month = aug,
day = "30",
doi = "10.1021/acs.jpclett.7b01685",
language = "English",
volume = "8",
pages = "4668--4672",
journal = "Journal of Physical Chemistry Letters",
issn = "1948-7185",
publisher = "American Chemical Society",
number = "19",

}

RIS

TY - JOUR

T1 - Electrolyte-induced Instability of Colloidal Dispersions in Nonpolar Solvents

AU - Smith, Gregory N.

AU - Finlayson, Samuel D.

AU - Rogers, Sarah E.

AU - Bartlett, Paul

AU - Eastoe, Julian

PY - 2017/8/30

Y1 - 2017/8/30

N2 - Dispersions of poly(methyl methacrylate) (PMMA) latexes were prepared in a low dielectric, nonpolar solvent (dodecane) both with and without the oil-soluble electrolyte, tetradodecylammonium-tetrakis(3,5-bis(trifluoromethyl)phenyl)borate. For dispersions with a high concentration of background electrolyte, the latexes become colloidally unstable and sediment in a short period of time (<1 h). This is completely reversible upon dilution. Instability of the dispersions is due to an apparent attraction between the colloids, directly observed using optical tweezers by bringing optically trapped particles into close proximity. Simple explanations generally used by colloid scientists to explain loss of stability (charge screening or stabilizer collapse) are insufficient to explain this observation. This unexpected interaction seems, therefore, to be a consequence of the materials that can be dispersed in low dielectric media and is expected to have ramifications for studying colloids in such solvents.

AB - Dispersions of poly(methyl methacrylate) (PMMA) latexes were prepared in a low dielectric, nonpolar solvent (dodecane) both with and without the oil-soluble electrolyte, tetradodecylammonium-tetrakis(3,5-bis(trifluoromethyl)phenyl)borate. For dispersions with a high concentration of background electrolyte, the latexes become colloidally unstable and sediment in a short period of time (<1 h). This is completely reversible upon dilution. Instability of the dispersions is due to an apparent attraction between the colloids, directly observed using optical tweezers by bringing optically trapped particles into close proximity. Simple explanations generally used by colloid scientists to explain loss of stability (charge screening or stabilizer collapse) are insufficient to explain this observation. This unexpected interaction seems, therefore, to be a consequence of the materials that can be dispersed in low dielectric media and is expected to have ramifications for studying colloids in such solvents.

U2 - 10.1021/acs.jpclett.7b01685

DO - 10.1021/acs.jpclett.7b01685

M3 - Journal article

C2 - 28853903

VL - 8

SP - 4668

EP - 4672

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 19

ER -

ID: 187579349