Journal: Journal of Colloid and Interface Science

Abbreviation

J. Colloid Interface Sci.

Publisher

Elsevier

Journal Volumes

ISSN

0021-9797
1095-7103

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Publications1 - 10 of 143
  • Dynamic oscillatory behavior of a linear viscoelastic fluid bounded by an ideal linear viscoelastic membrane in torsional flow
    Item type: Journal Article
    Romoscanu, Alexandre I.; Lawrence, Chris J.; Burbidge, Adam S.; et al. (2003)
    Journal of Colloid and Interface Science
  • Modulating the conformation of microgels by complexation with inorganic nanoparticles
    Item type: Journal Article
    Vialetto, Jacopo; Ramakrishna, Shivaprakash N.; Stock, Sebastian; et al. (2024)
    Journal of Colloid and Interface Science
    Hypothesis: The complexation of microgels with rigid nanoparticles is an effective way to impart novel properties and functions to the resulting hybrid particles for applications such as in optics, catalysis, or for the stabilization of foams/emulsions. The nanoparticles affect the conformation of the polymer network, both in bulk aqueous environments and when the microgels are adsorbed at a fluid interface, in a non-trivial manner by modulating the microgel size, stiffness and apparent contact angle. Experiments: Here, we provide a detailed investigation, using light scattering, in-situ atomic force microscopy and nano-indentation experiments, of the interaction between poly(N-isopropylacrylamide) microgels and hydrophobized silica nanoparticles after mixing in aqueous suspension to shed light on the network reorganization upon nanoparticle incorporation. Findings: The addition of nanoparticles decreases the microgels' bulk swelling and thermal response. When adsorbed at an oil-water interface, a higher ratio of nanoparticles influences the microgel's stiffness as well as their hydrophobic/hydrophilic character by increasing their effective contact angle, consequently modulating the monolayer response upon interfacial compression. Overall, these results provide fundamental understanding on the complex conformation of hybrid microgels in different environments and give inspiration to design new materials where the combination of a soft polymer network and nanoparticles might result in additional functionalities.
  • Influence of the interfacial tension on the microstructural and mechanical properties of microgels at fluid interfaces
    Item type: Journal Article
    Vialetto, Jacopo; Nussbaum, Natalie; Bergfreund, Jotam; et al. (2022)
    Journal of Colloid and Interface Science
    Microgels are soft colloidal particles constituted by cross-linked polymer networks with a high potential for applications. In particular, after adsorption at a fluid interface, interfacial tension provides two-dimensional (2D) confinement for microgel monolayers and drives the reconfiguration of the particles, enabling their deployment in foam and emulsion stabilization and in surface patterning for lithography, sensing and optical materials. However, most studies focus on systems of fluids with a high interfacial tension, e.g. alkanes/ or air/water interfaces, which imparts similar properties to the assembled monolayers. Here, instead, we compare two organic fluid phases, hexane and methyl tert-butyl ether, which have markedly different interfacial tension () values with water and thus tune the deformation of adsorbed microgels. We rationalize how controls the single-particle morphology, which consequently modulates the structural and mechanical response of the monolayers at varying interfacial compression. Specifically, when is low, the microgels are less deformed within the interface plane and their polymer networks can rearrange more easily upon lateral compression, leading to softer monolayers. Selecting interfaces with different surface energy offers an additional control to customize the 2D assembly of soft particles, from the fine-tuning of particle size and interparticle spacing to the tailoring of mechanical properties.
  • Self-assembly of ellipsoidal particles at fluid-fluid interfaces with an empirical pair potential
    Item type: Journal Article
    Luo, Alan M.; Vermant, Jan; Ilg, Patrick; et al. (2019)
    Journal of Colloid and Interface Science
  • A Discrete-Sectional Model for Powder Production by Gas-Phase Chemical Reaction and Aerosol Coagulation in the Free Molecular Regime
    Item type: Journal Article
    Landgrebe, James D.; Pratsinis, Sotiris E. (1990)
    Journal of Colloid and Interface Science
  • Fragmentation and restructuring of soft-agglomerates under shear
    Item type: Journal Article
    Eggersdorfer, M. L.; Kadau, D.; Herrmann, Hans Jürgen; et al. (2010)
    Journal of Colloid and Interface Science
  • Electrically induced lipid migration in non-lamellar phase
    Item type: Journal Article
    Sugihara, Kaori; Stucki, Janick; Isa, Lucio; et al. (2012)
    Journal of Colloid and Interface Science
  • Chemisorption of methyl mercaptane on titania-supported Au nanoparticles
    Item type: Journal Article
    Vegten, Niels van; Haider, Peter; Maciejewski, Marek; et al. (2009)
    Journal of Colloid and Interface Science
  • Experimental observation of oscillatory effects on the relaxation of a sheared liquid drop
    Item type: Journal Article
    Megias-Alguacil, David (2007)
    Journal of Colloid and Interface Science
  • Shear rheological properties of acid hydrolyzed insoluble proteins from Chlorella protothecoides at the oil-water interface
    Item type: Journal Article
    Dai, Laixin; Bergfreund, Jotam; Reichert, Corina L.; et al. (2019)
    Journal of Colloid and Interface Science
Publications1 - 10 of 143