Publications by authors named "Jeffrey Penfold"

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The Gibbs and Butler Equations and the Surface Activity of Dilute Aqueous Solutions of Strong and Weak Linear Polyelectrolyte-Surfactant Mixtures: The Roles of Surface Composition and Polydispersity.
Jeffrey Penfold, Robert K Thomas

J Phys Chem B· August 2024

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Neutron reflection and the thermodynamics of the air-water interface.
Jeffrey Penfold, Robert K Thomas

Phys Chem Chem Phys· April 2022

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Surface Activity of Ethoxylate Surfactants with Different Hydrophobic Architectures: The Effect of Layer Substructure on Surface Tension and Adsorption.
James R Reeve, Robert K Thomas, Jeffrey Penfold

Langmuir· August 2021

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Unusual Maximum in the Adsorption of Aqueous Surfactant Mixtures: Neutron Reflectometry of Mixtures of Zwitterionic and Ionic Surfactants at the Silica-Aqueous Interface.
Kun Ma, Pei Xun Li, Robert K Thomas, Jeffrey Penfold

Langmuir· April 2021

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Collapsed Structure of Hydrophobically Modified Polyacrylamide Adsorbed at the Air-Water Interface: The Polymer Surface Excess and the Gibbs Equation.
Jin Zhang, Robert K Thomas, Jeffrey Penfold

Langmuir· October 2020

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Counterion Condensation, the Gibbs Equation, and Surfactant Binding: An Integrated Description of the Behavior of Polyelectrolytes and Their Mixtures with Surfactants at the Air-Water Interface.
Jeffrey Penfold, Robert K Thomas

J Phys Chem B· July 2020

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The structure of alkyl ester sulfonate surfactant micelles: The impact of different valence electrolytes and surfactant structure on micelle growth.
Zi Wang, Peixun Li, Kun Ma, Yao Chen, Jeffrey Penfold

J Colloid Interface Sci· December 2019

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Impact of molecular structure, headgroup and alkyl chain geometry, on the adsorption of the anionic ester sulfonate surfactants at the air-solution interface, in the presence and absence of electrolyte.
Zi Wang, Peixun Li, Kun Ma, Yao Chen, Mario Campana, Jeffrey Penfold

J Colloid Interface Sci· May 2019

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The role of competitive counterion adsorption on the electrolyte induced surface ordering in methyl ester sulfonate surfactants at the air-water interface.
Hui Xu, Peixun Li, Kun Ma, Rebecca J L Welbourn, Jeffrey Penfold

J Colloid Interface Sci· January 2019

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Adsorption and self-assembly in methyl ester sulfonate surfactants, their eutectic mixtures and the role of electrolyte.
Hui Xu, Peixun Li, Kun Ma, Rebecca J L Welbourn, James Doutch, Jeffrey Penfold

J Colloid Interface Sci· April 2018

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Effects of length and hydrophilicity/hydrophobicity of diamines on self-assembly of diamine/SDS gemini-like surfactants.
Zhidi Chen, Jeffrey Penfold, Peixun Li, James Doutch, Yaxun Fan

Soft Matter· December 2017

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Adsorption at the Air-Water Interface in Biosurfactant-Surfactant Mixtures: Quantitative Analysis of Adsorption in a Five-Component Mixture.
Jessica R Liley, Robert K Thomas, Jeffrey Penfold, Ian M Tucker, Jordan T Petkov

Langmuir· November 2017

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Adsorption of Methyl Ester Sulfonate at the Air-Water Interface: Can Limitations in the Application of the Gibbs Equation be Overcome by Computer Purification?
Hui Xu, Peixun Li, Kun Ma, Rebecca J L Welbourn, Jeffrey Penfold

Langmuir· September 2017

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Impact of Electrolyte on Adsorption at the Air-Water Interface for Ternary Surfactant Mixtures above the Critical Micelle Concentration.
Jessica R Liley, Robert K Thomas, Jeffrey Penfold, Ian M Tucker, Jordan T Petkov

Langmuir· May 2017

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Surface Adsorption in Ternary Surfactant Mixtures above the Critical Micelle Concentration: Effects of Asymmetry on the Composition Dependence of the Excess Free Energy.
Jessica R Liley, Robert K Thomas, Jeffrey Penfold, Ian M Tucker, Jordan T Petkov

J Phys Chem B· April 2017

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Unusual Adsorption at the Air-Water Interface of a Zwitterionic Carboxybetaine with a Large Charge Separation.
Kun Ma, Pei Xun Li, Chu Chuan Dong, Robert K Thomas, Jeffrey Penfold

Langmuir· April 2016

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Analysis of the Asymmetric Synergy in the Adsorption of Zwitterionic-Ionic Surfactant Mixtures at the Air-Water Interface below and above the Critical Micelle Concentration.
Peixun Li, Kun Ma, Robert K Thomas, Jeffrey Penfold

J Phys Chem B· April 2016

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Anionic surfactant - Biogenic amine interactions: The role of surfactant headgroup geometry.
Jeffrey Penfold, Robert K Thomas, Peixun Li

J Colloid Interface Sci· March 2016

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Manipulating perfume delivery to the interface using polymer-surfactant interactions.
Robert Bradbury, Jeffrey Penfold, Robert K Thomas, Ian M Tucker, Jordan T Petkov

J Colloid Interface Sci· March 2016

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Impact of biogenic amine molecular weight and structure on surfactant adsorption at the air-water interface.
Jeffrey Penfold, Robert K Thomas, Peixun Li

J Colloid Interface Sci· February 2016

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Enhanced perfume surface delivery to interfaces using surfactant surface multilayer structures.
Robert Bradbury, Jeffrey Penfold, Robert K Thomas, Ian M Tucker, Jordan T Petkov

J Colloid Interface Sci· January 2016

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Adsorption of Hydrophobin-Protein Mixtures at the Air-Water Interface: The Impact of pH and Electrolyte.
Ian M Tucker, Jordan T Petkov, Jeffrey Penfold, Robert K Thomas, Andrew R Cox

Langmuir· September 2015

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Multilayering of Surfactant Systems at the Air-Dilute Aqueous Solution Interface.
Robert K Thomas, Jeffrey Penfold

Langmuir· July 2015

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Multivalent-Counterion-Induced Surfactant Multilayer Formation at Hydrophobic and Hydrophilic Solid-Solution Interfaces.
Jeffrey Penfold, Robert K Thomas, Peixun Li, Hui Xu, Ian M Tucker

Langmuir· June 2015

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Adsorption at air-water and oil-water interfaces and self-assembly in aqueous solution of ethoxylated polysorbate nonionic surfactants.
Jeffrey Penfold, Robert K Thomas, Peixun X Li, Jordan T Petkov, Ian Tucker

Langmuir· March 2015

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