Foam and thin films of hydrophilic silica particles modified by β-casein

M. Chen, G. Sala, H.J.F. van Valenberg, A.C.M. van Hooijdonk, E. van der Linden, M.B.J. Meinders*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Hypothesis Foaming properties of particle dispersions can be modified by addition of amphiphiles. The molar ratio between particles and amphiphiles will influence the wetting properties of the particles as well as the bulk concentration of the amphiphiles. This will have an effect on air/water interfacial composition as well as on the thin film and foam stability of the mixed system. Experiments In this research foams and thin films of hydrophilic silica particles in presence of β-casein (β-CN) were investigated with different particle sizes and varying β-CN/silica weight ratios (between 1:10 and 1:100). Samples were characterized for particles size, morphology as well as contact angle and related to their foaming, interfacial, and thin film properties. Findings A threshold weight ratio of β-CN/silica was found to be 1:50 for foam stabilization with mixtures containing silica particles no larger than 1 μm and 1:30 for film stabilization with mixtures containing larger particles. At the interface, the modified silica particles were rather diluted without much interaction for surface compressions up to 30%. Large silica particles (0.0015% β-CN, Csilica ≤ 0.15%) were dragged to the periphery of the thin liquid films but no decrease of the inner film draining rate by a decrease of capilary pressure gradient across the film was observed. The depletion of β-casein in the bulk by particles played a major role in foam destabilization.
Original languageEnglish
Pages (from-to)357-366
JournalJournal of Colloid and Interface Science
Volume513
DOIs
Publication statusPublished - 1 Mar 2018

Fingerprint

Casein
Caseins
Silicon Dioxide
Foams
Silica
Thin films
Amphiphiles
Stabilization
Particle size
Liquid films
Pressure gradient
Dispersions
Contact angle
Wetting
Water
Air
Chemical analysis

Keywords

  • Foam
  • Particle size
  • Silica particle
  • Thin film
  • β-casein

Cite this

@article{655bce7121094089803b1a117d660ca0,
title = "Foam and thin films of hydrophilic silica particles modified by β-casein",
abstract = "Hypothesis Foaming properties of particle dispersions can be modified by addition of amphiphiles. The molar ratio between particles and amphiphiles will influence the wetting properties of the particles as well as the bulk concentration of the amphiphiles. This will have an effect on air/water interfacial composition as well as on the thin film and foam stability of the mixed system. Experiments In this research foams and thin films of hydrophilic silica particles in presence of β-casein (β-CN) were investigated with different particle sizes and varying β-CN/silica weight ratios (between 1:10 and 1:100). Samples were characterized for particles size, morphology as well as contact angle and related to their foaming, interfacial, and thin film properties. Findings A threshold weight ratio of β-CN/silica was found to be 1:50 for foam stabilization with mixtures containing silica particles no larger than 1 μm and 1:30 for film stabilization with mixtures containing larger particles. At the interface, the modified silica particles were rather diluted without much interaction for surface compressions up to 30{\%}. Large silica particles (0.0015{\%} β-CN, Csilica ≤ 0.15{\%}) were dragged to the periphery of the thin liquid films but no decrease of the inner film draining rate by a decrease of capilary pressure gradient across the film was observed. The depletion of β-casein in the bulk by particles played a major role in foam destabilization.",
keywords = "Foam, Particle size, Silica particle, Thin film, β-casein",
author = "M. Chen and G. Sala and {van Valenberg}, H.J.F. and {van Hooijdonk}, A.C.M. and {van der Linden}, E. and M.B.J. Meinders",
year = "2018",
month = "3",
day = "1",
doi = "10.1016/j.jcis.2017.11.022",
language = "English",
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pages = "357--366",
journal = "Journal of Colloid and Interface Science",
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Foam and thin films of hydrophilic silica particles modified by β-casein. / Chen, M.; Sala, G.; van Valenberg, H.J.F.; van Hooijdonk, A.C.M.; van der Linden, E.; Meinders, M.B.J.

In: Journal of Colloid and Interface Science, Vol. 513, 01.03.2018, p. 357-366.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Foam and thin films of hydrophilic silica particles modified by β-casein

AU - Chen, M.

AU - Sala, G.

AU - van Valenberg, H.J.F.

AU - van Hooijdonk, A.C.M.

AU - van der Linden, E.

AU - Meinders, M.B.J.

PY - 2018/3/1

Y1 - 2018/3/1

N2 - Hypothesis Foaming properties of particle dispersions can be modified by addition of amphiphiles. The molar ratio between particles and amphiphiles will influence the wetting properties of the particles as well as the bulk concentration of the amphiphiles. This will have an effect on air/water interfacial composition as well as on the thin film and foam stability of the mixed system. Experiments In this research foams and thin films of hydrophilic silica particles in presence of β-casein (β-CN) were investigated with different particle sizes and varying β-CN/silica weight ratios (between 1:10 and 1:100). Samples were characterized for particles size, morphology as well as contact angle and related to their foaming, interfacial, and thin film properties. Findings A threshold weight ratio of β-CN/silica was found to be 1:50 for foam stabilization with mixtures containing silica particles no larger than 1 μm and 1:30 for film stabilization with mixtures containing larger particles. At the interface, the modified silica particles were rather diluted without much interaction for surface compressions up to 30%. Large silica particles (0.0015% β-CN, Csilica ≤ 0.15%) were dragged to the periphery of the thin liquid films but no decrease of the inner film draining rate by a decrease of capilary pressure gradient across the film was observed. The depletion of β-casein in the bulk by particles played a major role in foam destabilization.

AB - Hypothesis Foaming properties of particle dispersions can be modified by addition of amphiphiles. The molar ratio between particles and amphiphiles will influence the wetting properties of the particles as well as the bulk concentration of the amphiphiles. This will have an effect on air/water interfacial composition as well as on the thin film and foam stability of the mixed system. Experiments In this research foams and thin films of hydrophilic silica particles in presence of β-casein (β-CN) were investigated with different particle sizes and varying β-CN/silica weight ratios (between 1:10 and 1:100). Samples were characterized for particles size, morphology as well as contact angle and related to their foaming, interfacial, and thin film properties. Findings A threshold weight ratio of β-CN/silica was found to be 1:50 for foam stabilization with mixtures containing silica particles no larger than 1 μm and 1:30 for film stabilization with mixtures containing larger particles. At the interface, the modified silica particles were rather diluted without much interaction for surface compressions up to 30%. Large silica particles (0.0015% β-CN, Csilica ≤ 0.15%) were dragged to the periphery of the thin liquid films but no decrease of the inner film draining rate by a decrease of capilary pressure gradient across the film was observed. The depletion of β-casein in the bulk by particles played a major role in foam destabilization.

KW - Foam

KW - Particle size

KW - Silica particle

KW - Thin film

KW - β-casein

U2 - 10.1016/j.jcis.2017.11.022

DO - 10.1016/j.jcis.2017.11.022

M3 - Article

VL - 513

SP - 357

EP - 366

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

SN - 0021-9797

ER -