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Title: Ultrasound-based formation of nano-Pickering emulsions investigated via in-situ SAXS

Abstract

We report that sonication is one of the most commonly used methods to synthesize Pickering emulsions. Yet, the process of emulsion sonication is rarely characterized in detail and acoustic conditions are largely determined by experimenter's personal experience. In this study, the role of sonication in the formation of Pickering emulsions from amphiphilic gold nanoparticles was investigated using a new sample environment combining ultrasound delivery with ultra-small-angle X-ray scattering (USAXS) measurements. The detection of acoustic cavitation and the simultaneous analysis of structural data via USAXS demonstrated direct correlation between Pickering emulsion formation and cavitation events. There was no evidence of spontaneous adsorption of particles onto the oil-water interface without ultrasound, which suggests the presence of a stabilizing force. Acoustically detected cavitation events could originate in the bulk solvent and/or inside the emulsion droplets. Lastly, these events helped overcome energy barriers to induce particle adsorption.

Authors:
 [1];  [1];  [2];  [2];  [1];  [1];  [1]
  1. Univ. of Washington, Seattle, WA (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE; Petroleum Research Fund (PRF); National Institutes of Health (NIH)
OSTI Identifier:
1493883
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Colloid and Interface Science
Additional Journal Information:
Journal Volume: 536; Journal Issue: C; Journal ID: ISSN 0021-9797
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; Pickering emulsion; Ultra-small-angle X-ray scattering; Ultrasound; Cavitation

Citation Formats

Lee, Yi-Ting, Li, David S., Ilavsky, Jan, Kuzmenko, Ivan, Jeng, Geng-Shi, O'Donnell, Matthew, and Pozzo, Lilo D. Ultrasound-based formation of nano-Pickering emulsions investigated via in-situ SAXS. United States: N. p., 2018. Web. doi:10.1016/j.jcis.2018.10.047.
Lee, Yi-Ting, Li, David S., Ilavsky, Jan, Kuzmenko, Ivan, Jeng, Geng-Shi, O'Donnell, Matthew, & Pozzo, Lilo D. Ultrasound-based formation of nano-Pickering emulsions investigated via in-situ SAXS. United States. doi:10.1016/j.jcis.2018.10.047.
Lee, Yi-Ting, Li, David S., Ilavsky, Jan, Kuzmenko, Ivan, Jeng, Geng-Shi, O'Donnell, Matthew, and Pozzo, Lilo D. Fri . "Ultrasound-based formation of nano-Pickering emulsions investigated via in-situ SAXS". United States. doi:10.1016/j.jcis.2018.10.047.
@article{osti_1493883,
title = {Ultrasound-based formation of nano-Pickering emulsions investigated via in-situ SAXS},
author = {Lee, Yi-Ting and Li, David S. and Ilavsky, Jan and Kuzmenko, Ivan and Jeng, Geng-Shi and O'Donnell, Matthew and Pozzo, Lilo D.},
abstractNote = {We report that sonication is one of the most commonly used methods to synthesize Pickering emulsions. Yet, the process of emulsion sonication is rarely characterized in detail and acoustic conditions are largely determined by experimenter's personal experience. In this study, the role of sonication in the formation of Pickering emulsions from amphiphilic gold nanoparticles was investigated using a new sample environment combining ultrasound delivery with ultra-small-angle X-ray scattering (USAXS) measurements. The detection of acoustic cavitation and the simultaneous analysis of structural data via USAXS demonstrated direct correlation between Pickering emulsion formation and cavitation events. There was no evidence of spontaneous adsorption of particles onto the oil-water interface without ultrasound, which suggests the presence of a stabilizing force. Acoustically detected cavitation events could originate in the bulk solvent and/or inside the emulsion droplets. Lastly, these events helped overcome energy barriers to induce particle adsorption.},
doi = {10.1016/j.jcis.2018.10.047},
journal = {Journal of Colloid and Interface Science},
issn = {0021-9797},
number = C,
volume = 536,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 19, 2019
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