publication . Article . 2017

Foaming Behavior of Polymer-Coated Colloids: The Need for Thick Liquid Films

Yu, K; Zhang, H; Hodges, C; Biggs, S; Xu, Z; Cayre, OJ; Harbottle, D;
Open Access English
  • Published: 05 Jul 2017
  • Publisher: American Chemical Society
  • Country: United Kingdom
Abstract
The current study examined the foaming behavior of poly(vinylpyrrolidone) (PVP)–silica composite nanoparticles. Individually, the two components, PVP and silica nanoparticles, exhibited very little potential to partition at the air–water interface, and as such, stable foams could not be generated. In contrast, combining the two components to form silica–PVP core–shell nanocomposites led to good “foamability” and long-term foam stability. Addition of an electrolyte (Na2SO4) was shown to have a marked effect on the foam stability. By varying the concentration of electrolyte between 0 and 0.55 M, three regions of foam stability were observed: rapid foam collapse at...

1. Hitchcock, J. P.; Tasker, A. L.; Baxter, E. A.; Biggs, S.; Cayre, O. J. Long -Term Retention of Small, Volatile Molecular Species within Metallic Microcapsules. Acs Appl Mater Inter 2015, 7 (27), 14808-14815.

2. Subramaniam, A. B.; Abkarian, M.; Mahadevan, L.; Stone, H. A. Non-spherical bubbles. Nature 2005, 438 (7070), 930-930.

3. Subramaniam, A. B.; Abkarian, M.; Stone, H. A. Controlled assembly of jammed colloidal shells on fluid droplets. Nat Mater 2005, 4 (7), 553-556.

4. Pan, M.; Rosenfeld, L.; Kim, M.; Xu, M. Q.; Lin, E.; Derda, R.; Tang, S. K. Y. Fluorinated Pickering Emulsions Impede Interfacial Transport and Form Rigid Interface for the Growth of Anchorage-Dependent Cells. Acs Appl Mater Inter 2014, 6 (23), 21446-21453.

5. Tan, H.; Sun, G. Q.; Lin, W.; Mu, C. D.; Ngai, T. Gelatin Particle-Stabilized High Internal Phase Emulsions as Nutraceutical Containers. Acs Appl Mater Inter 2014, 6 (16), 13977- 13984.

6. Pihan, S. A.; Emmerling, S. G. J.; Butt, H. J.; Berger, R.; Gutmann, J. S. Soft Nanocomposites-From Interface Control to Interphase Formation. Acs Appl Mater Inter 2015, 7 (23), 12380-12386.

Abstract
The current study examined the foaming behavior of poly(vinylpyrrolidone) (PVP)–silica composite nanoparticles. Individually, the two components, PVP and silica nanoparticles, exhibited very little potential to partition at the air–water interface, and as such, stable foams could not be generated. In contrast, combining the two components to form silica–PVP core–shell nanocomposites led to good “foamability” and long-term foam stability. Addition of an electrolyte (Na2SO4) was shown to have a marked effect on the foam stability. By varying the concentration of electrolyte between 0 and 0.55 M, three regions of foam stability were observed: rapid foam collapse at...

1. Hitchcock, J. P.; Tasker, A. L.; Baxter, E. A.; Biggs, S.; Cayre, O. J. Long -Term Retention of Small, Volatile Molecular Species within Metallic Microcapsules. Acs Appl Mater Inter 2015, 7 (27), 14808-14815.

2. Subramaniam, A. B.; Abkarian, M.; Mahadevan, L.; Stone, H. A. Non-spherical bubbles. Nature 2005, 438 (7070), 930-930.

3. Subramaniam, A. B.; Abkarian, M.; Stone, H. A. Controlled assembly of jammed colloidal shells on fluid droplets. Nat Mater 2005, 4 (7), 553-556.

4. Pan, M.; Rosenfeld, L.; Kim, M.; Xu, M. Q.; Lin, E.; Derda, R.; Tang, S. K. Y. Fluorinated Pickering Emulsions Impede Interfacial Transport and Form Rigid Interface for the Growth of Anchorage-Dependent Cells. Acs Appl Mater Inter 2014, 6 (23), 21446-21453.

5. Tan, H.; Sun, G. Q.; Lin, W.; Mu, C. D.; Ngai, T. Gelatin Particle-Stabilized High Internal Phase Emulsions as Nutraceutical Containers. Acs Appl Mater Inter 2014, 6 (16), 13977- 13984.

6. Pihan, S. A.; Emmerling, S. G. J.; Butt, H. J.; Berger, R.; Gutmann, J. S. Soft Nanocomposites-From Interface Control to Interphase Formation. Acs Appl Mater Inter 2015, 7 (23), 12380-12386.

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