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Title: Interfacial Activity of Amine-Functionalized Polyhedral Oligomeric Silsesquioxanes (POSS): A Simple Strategy To Structure Liquids

Abstract

Amine-functionalized polyhedral oligomeric silsesquioxane (POSS), the smallest, monodisperse cage-shaped silica cubic nanoparticle, is exceptionally interfacially active and can form assemblies that jam the toluene/water interface, locking in non-equilibrium shapes of one liquid phase in another. The packing density of the amine-functionalized POSS assembly at the water/toluene interface can be tuned by varying the concentration, the pH value, and the degree of POSS functionalization. Functionalized POSS gives a higher interface coverage, and hence a lower interfacial tension, than nanoparticle surfactants formed by interactions between functionalized nanoparticles and polymeric ligands. Here, hydrogen-bonded POSS surfactants are more stable at the interface, offering some unique advantages for generating Pickering emulsions over typical micron-sized colloidal particles and ligand-stabilized nanoparticle surfactants.

Authors:
 [1];  [2];  [3];  [4];  [2];  [2];  [4]; ORCiD logo [5]
  1. Shanghai Jiao Tong Univ. (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Massachusetts, Amherst, MA (United States)
  2. Shanghai Jiao Tong Univ. (China)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Massachusetts, Amherst, MA (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Massachusetts, Amherst, MA (United States); Beijing Univ. of Chemical Technology (China)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); Shanghai Municipal Government; China Scholarship Council
OSTI Identifier:
1634047
Alternate Identifier(s):
OSTI ID: 1529416
Grant/Contract Number:  
AC02-05CH11231; 51773144; 17JC1400700; KCTR16
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 58; Journal Issue: 30; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; liquid/liquid interfaces; POSS; self-assembly; structured liquids; wrinkling

Citation Formats

Hou, Honghao, Li, Jin, Li, Xiangming, Forth, Joe, Yin, Jie, Jiang, Xuesong, Helms, Brett A., and Russell, Thomas P. Interfacial Activity of Amine-Functionalized Polyhedral Oligomeric Silsesquioxanes (POSS): A Simple Strategy To Structure Liquids. United States: N. p., 2019. Web. doi:10.1002/anie.201903420.
Hou, Honghao, Li, Jin, Li, Xiangming, Forth, Joe, Yin, Jie, Jiang, Xuesong, Helms, Brett A., & Russell, Thomas P. Interfacial Activity of Amine-Functionalized Polyhedral Oligomeric Silsesquioxanes (POSS): A Simple Strategy To Structure Liquids. United States. https://doi.org/10.1002/anie.201903420
Hou, Honghao, Li, Jin, Li, Xiangming, Forth, Joe, Yin, Jie, Jiang, Xuesong, Helms, Brett A., and Russell, Thomas P. Fri . "Interfacial Activity of Amine-Functionalized Polyhedral Oligomeric Silsesquioxanes (POSS): A Simple Strategy To Structure Liquids". United States. https://doi.org/10.1002/anie.201903420. https://www.osti.gov/servlets/purl/1634047.
@article{osti_1634047,
title = {Interfacial Activity of Amine-Functionalized Polyhedral Oligomeric Silsesquioxanes (POSS): A Simple Strategy To Structure Liquids},
author = {Hou, Honghao and Li, Jin and Li, Xiangming and Forth, Joe and Yin, Jie and Jiang, Xuesong and Helms, Brett A. and Russell, Thomas P.},
abstractNote = {Amine-functionalized polyhedral oligomeric silsesquioxane (POSS), the smallest, monodisperse cage-shaped silica cubic nanoparticle, is exceptionally interfacially active and can form assemblies that jam the toluene/water interface, locking in non-equilibrium shapes of one liquid phase in another. The packing density of the amine-functionalized POSS assembly at the water/toluene interface can be tuned by varying the concentration, the pH value, and the degree of POSS functionalization. Functionalized POSS gives a higher interface coverage, and hence a lower interfacial tension, than nanoparticle surfactants formed by interactions between functionalized nanoparticles and polymeric ligands. Here, hydrogen-bonded POSS surfactants are more stable at the interface, offering some unique advantages for generating Pickering emulsions over typical micron-sized colloidal particles and ligand-stabilized nanoparticle surfactants.},
doi = {10.1002/anie.201903420},
journal = {Angewandte Chemie (International Edition)},
number = 30,
volume = 58,
place = {United States},
year = {Fri May 17 00:00:00 EDT 2019},
month = {Fri May 17 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 38 works
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Figures / Tables:

Figure 1 Figure 1: (a) Dynamic interfacial tension of the water/toluene interface at different concentrations of POSS-8A from 0.1 to 10 mg mL−1 with deionized water as reference. (b-d) A series of snapshots showing the evolution of a droplet that was injected from 2.5 mg mL−1 POSS-8A aqueous solution into toluene andmore » crumpled/uncrumpled circle with the volume reduction or reinjection to the original volume.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.