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Title: Unraveling the Molecular Weight Dependence of Interfacial Interactions in Poly(2-vinylpyridine)/Silica Nanocomposites

Abstract

In this paper, the structure and polymer–nanoparticle interactions among physically adsorbed poly(2-vinylpyridine) chains on the surface of silica nanoparticles (NPs) were systematically studied as a function of molecular weight (MW) by sum frequency generation (SFG) and X-ray photoelectron (XPS) spectroscopies. Analysis of XPS data identified hydrogen bonds between the polymer and NPs, while SFG evaluated the change in the number of free OH sites on the NP’s surface. Our data revealed that the hydrogen bonds and amount of the free ¯OH sites have a significant dependence on the polymer’s MW. Finally, these results provide clear experimental evidence that the interaction of physically adsorbed chains with nanoparticles is strongly MW dependent and aids in unraveling the microscopic mechanism responsible for the strong MW dependence of dynamics of the interfacial layer in polymer nanocomposites.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [3];  [1]; ORCiD logo [1];  [3]; ORCiD logo [5]
+ Show Author Affiliations
  1. Univ. of Tennessee, Knoxville, TN (United States). Department of Chemistry
  2. Univ. of Tennessee, Knoxville, TN (United States). Department of Physics and Astronomy
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  5. Univ. of Tennessee, Knoxville, TN (United States). Department of Chemistry and Department of Physics and Astronomy; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1422573
Alternate Identifier(s):
OSTI ID: 1347340
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
ACS Macro Letters
Additional Journal Information:
Journal Volume: 6; Journal Issue: 2; Journal ID: ISSN 2161-1653
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Voylov, Dmitry N., Holt, Adam P., Doughty, Benjamin L., Bocharova, Vera, Meyer, Harry M., Cheng, Shiwang, Martin, Halie J., Dadmun, Mark D., Kisliuk, Alexander, and Sokolov, Alexei P. Unraveling the Molecular Weight Dependence of Interfacial Interactions in Poly(2-vinylpyridine)/Silica Nanocomposites. United States: N. p., 2017. Web. doi:10.1021/acsmacrolett.6b00915.
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Voylov, Dmitry N., Holt, Adam P., Doughty, Benjamin L., Bocharova, Vera, Meyer, Harry M., Cheng, Shiwang, Martin, Halie J., Dadmun, Mark D., Kisliuk, Alexander, & Sokolov, Alexei P. Unraveling the Molecular Weight Dependence of Interfacial Interactions in Poly(2-vinylpyridine)/Silica Nanocomposites. United States. https://doi.org/10.1021/acsmacrolett.6b00915
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Voylov, Dmitry N., Holt, Adam P., Doughty, Benjamin L., Bocharova, Vera, Meyer, Harry M., Cheng, Shiwang, Martin, Halie J., Dadmun, Mark D., Kisliuk, Alexander, and Sokolov, Alexei P. Tue . "Unraveling the Molecular Weight Dependence of Interfacial Interactions in Poly(2-vinylpyridine)/Silica Nanocomposites". United States. https://doi.org/10.1021/acsmacrolett.6b00915. https://www.osti.gov/servlets/purl/1422573.
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@article{osti_1422573,
title = {Unraveling the Molecular Weight Dependence of Interfacial Interactions in Poly(2-vinylpyridine)/Silica Nanocomposites},
author = {Voylov, Dmitry N. and Holt, Adam P. and Doughty, Benjamin L. and Bocharova, Vera and Meyer, Harry M. and Cheng, Shiwang and Martin, Halie J. and Dadmun, Mark D. and Kisliuk, Alexander and Sokolov, Alexei P.},
abstractNote = {In this paper, the structure and polymer–nanoparticle interactions among physically adsorbed poly(2-vinylpyridine) chains on the surface of silica nanoparticles (NPs) were systematically studied as a function of molecular weight (MW) by sum frequency generation (SFG) and X-ray photoelectron (XPS) spectroscopies. Analysis of XPS data identified hydrogen bonds between the polymer and NPs, while SFG evaluated the change in the number of free OH sites on the NP’s surface. Our data revealed that the hydrogen bonds and amount of the free ¯OH sites have a significant dependence on the polymer’s MW. Finally, these results provide clear experimental evidence that the interaction of physically adsorbed chains with nanoparticles is strongly MW dependent and aids in unraveling the microscopic mechanism responsible for the strong MW dependence of dynamics of the interfacial layer in polymer nanocomposites.},
doi = {10.1021/acsmacrolett.6b00915},
journal = {ACS Macro Letters},
number = 2,
volume = 6,
place = {United States},
year = {Tue Jan 10 00:00:00 EST 2017},
month = {Tue Jan 10 00:00:00 EST 2017}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1021/acsmacrolett.6b00915
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Cited by: 56 works
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Figures / Tables:

Figure S1 Figure S1: Transmission electron microscopy images for a low MW (9 kg/mol) PNC at 50wt% silica concentration.
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      Figures / Tables found in this record:

      Figure S1 (p. 3)figure
      Figure S2 (p. 4)figure
      Table S1 (p. 5)table
      Figure S3 (p. 6)figure
      Figure S4 (p. 7)figure
      Table S2 (p. 8)table
      Figure S5 (p. 10)figure
      Figure S6 (p. 13)figure
      Figure S7 (p. 15)figure
      Figure S8 (p. 16)figure
      Figure S9 (p. 17)figure
      Figure S10 (p. 18)figure
      Figure S11 (p. 19)figure
      Table S3 (p. 20)table
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