Adsorption of Fatty Acid Molecules on Amine-Functionalized Silica Nanoparticles: Surface Organization and Foam Stability

Ma, Yingzhen; Wu, Yao; Lee, Jin Gyun; He, Lilin; Rother, Gernot; Fameau, Anne-Laure; Shelton, William A.; Bharti, Bhuvnesh

doi:10.1021/acs.langmuir.0c00156

Title: Adsorption of Fatty Acid Molecules on Amine-Functionalized Silica Nanoparticles: Surface Organization and Foam Stability

Abstract

The crucial roles of the ionization state and counterion’s presence on the phase behavior of fatty acid in aqueous solutions are well established. However, the effects of counterion on the adsorption and morphological state of fatty acid on nanoparticle surfaces are largely unknown. This knowledge gap exists due to the high complexity of the interactions between nanoparticles, counterions and fatty acid molecules in aqueous solution. In this study, we use adsorption isotherms, small angle neutron scattering, and all-atom molecular dynamic simulations to investigate the effect of addition of ethanolamine as counterion on the adsorption and self-assembly of decanoic acid onto aminopropyl modified silica nanoparticles. We show that the morphology of the fatty acid assemblies on silica nanoparticles changes from discrete surface patches to a continuous bilayer by increasing concentration of the counterion. This morphological behavior of fatty acid on oppositely charged nanoparticle surface alters the interfacial activity of the fatty acid-nanoparticle complex, and thus governs the stability of the foam formed by the mixture. Furthermore, our study provides new insights into the structure-property relationship of fatty acid-nanoparticle complexes, and outlines a framework to program the stability of foams formed by mixtures of nanoparticles and amphiphiles.

Authors:

Ma, Yingzhen ^[1]; Wu, Yao ^[1]; Lee, Jin Gyun ^[1]; He, Lilin ^[2];

^[3];

^[4];

^[5];

^[1]

Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
National Institute of French Agriculture Research, Nantes 44300, France
Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States, Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana 70803, United States

Publication Date:: 2020-03-22

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Louisiana State Univ., Baton Rouge, LA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division

OSTI Identifier:: 1632743

Alternate Identifier(s):: OSTI ID: 1608196; OSTI ID: 1670685

Grant/Contract Number:: SC0012432; AC05-00OR22725

Resource Type:: Published Article

Journal Name:: Langmuir

Additional Journal Information:: Journal Name: Langmuir Journal Volume: 36 Journal Issue: 14; Journal ID: ISSN 0743-7463

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; lipids; counterions; nanoparticles; molecules; foams

Citation Formats


                    Ma, Yingzhen, Wu, Yao, Lee, Jin Gyun, He, Lilin, Rother, Gernot, Fameau, Anne-Laure, Shelton, William A., and Bharti, Bhuvnesh. Adsorption of Fatty Acid Molecules on Amine-Functionalized Silica Nanoparticles: Surface Organization and Foam Stability.  United States: N. p., 2020. 
Web.  doi:10.1021/acs.langmuir.0c00156.

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                    Ma, Yingzhen, Wu, Yao, Lee, Jin Gyun, He, Lilin, Rother, Gernot, Fameau, Anne-Laure, Shelton, William A., & Bharti, Bhuvnesh. Adsorption of Fatty Acid Molecules on Amine-Functionalized Silica Nanoparticles: Surface Organization and Foam Stability.  United States.  https://doi.org/10.1021/acs.langmuir.0c00156

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                    Ma, Yingzhen, Wu, Yao, Lee, Jin Gyun, He, Lilin, Rother, Gernot, Fameau, Anne-Laure, Shelton, William A., and Bharti, Bhuvnesh. Sun .  
"Adsorption of Fatty Acid Molecules on Amine-Functionalized Silica Nanoparticles: Surface Organization and Foam Stability".  United States.  https://doi.org/10.1021/acs.langmuir.0c00156.

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@article{osti_1632743,

  title        = {Adsorption of Fatty Acid Molecules on Amine-Functionalized Silica Nanoparticles: Surface Organization and Foam Stability},

  author       = {Ma, Yingzhen and Wu, Yao and Lee, Jin Gyun and He, Lilin and Rother, Gernot and Fameau, Anne-Laure and Shelton, William A. and Bharti, Bhuvnesh},

  abstractNote = {The crucial roles of the ionization state and counterion’s presence on the phase behavior of fatty acid in aqueous solutions are well established. However, the effects of counterion on the adsorption and morphological state of fatty acid on nanoparticle surfaces are largely unknown. This knowledge gap exists due to the high complexity of the interactions between nanoparticles, counterions and fatty acid molecules in aqueous solution. In this study, we use adsorption isotherms, small angle neutron scattering, and all-atom molecular dynamic simulations to investigate the effect of addition of ethanolamine as counterion on the adsorption and self-assembly of decanoic acid onto aminopropyl modified silica nanoparticles. We show that the morphology of the fatty acid assemblies on silica nanoparticles changes from discrete surface patches to a continuous bilayer by increasing concentration of the counterion. This morphological behavior of fatty acid on oppositely charged nanoparticle surface alters the interfacial activity of the fatty acid-nanoparticle complex, and thus governs the stability of the foam formed by the mixture. Furthermore, our study provides new insights into the structure-property relationship of fatty acid-nanoparticle complexes, and outlines a framework to program the stability of foams formed by mixtures of nanoparticles and amphiphiles.},

  doi          = {10.1021/acs.langmuir.0c00156},

  journal      = {Langmuir},

  number       = 14,

  volume       = 36,

  place        = {United States},

  year         = {2020},

  month        = {3}

}

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Figures / Tables:

Figure 1: (a) Schematic representation of the synthesis of aminopropyl functionalized silica nanoparticles (mSiO²). The amino-propyl groups (−C₃H₆NH₂) were chemically grafted onto commercially available Ludox-TMA silica nanoparticles and then protonated to −C₃H₆NH₃⁺. (b) Experimental SAXS profiles (blue circles) for mSiO₂ nanoparticles in deionized water at pH 7. Solid line representsmore »

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