Quantitative imaging methods for heterogeneous multi-component films

Hooiveld, Ellard; Dols, Maarten; van der Gucht, Jasper; Sprakel, Joris; van der Kooij, Hanne M.

doi:10.1039/d3sm01212c

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…This technique does not require any pre‐treatment of the sample but does require spectral resolution of the investigated components (Hooiveld et al . 2023). Components that are of interest within the food industry, like lipids and proteins, however, do show a big overlap in their Raman spectra.…”

Section: Introductionmentioning

confidence: 99%

Single droplet drying of dairy‐based systems at spray drying like temperature–time trajectories

Eijkelboom,

Hooiveld,

Kingma

et al. 2024

Int J of Dairy Tech

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Upon spray drying of dairy powders, the distribution of components within the droplets can become nonuniform. In this study, the influence of the composition on the drying behaviour, morphological development and surface composition were studied using single droplet drying. The addition of fat was found to result in an earlier locking point (1.1 instead of 1.8 s). The fat content did not influence the morphological development, but the protein and lactose ratios did influence whether the dried particle was smooth or wrinkled. Confocal Raman microscopy revealed that the initial fat, lactose and protein contents influenced the dry surface composition. For example, fat was found on the surface of emulsions that were either rich in fat or in whey protein.

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Section: Introductionmentioning

confidence: 99%

Single droplet drying of dairy‐based systems at spray drying like temperature–time trajectories

Eijkelboom,

Hooiveld,

Kingma

et al. 2024

Int J of Dairy Tech

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Self-stratification and phase separation in drying binary colloidal films

Hooiveld,

Rijnders,

van der Meer

et al. 2025

Journal of Colloid and Interface Science

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Stratification in drying films: diffusiophoresis driven by nanoparticles and their counterions

Rees-Zimmerman,

Routh

2024

IMA Journal of Applied Mathematics

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Recent experimental work has highlighted that electrolyte-driven diffusiophoresis is likely to be the most significant phoretic motion in a mixture of silica nanoparticles and relatively large latex particles, which are commonly used in coatings. In this present work, this diffusiophoretic effect, powered by gradients in the nanoparticles and their stabilising cations, is modelled in drying films. A continuum hydrodynamic model is derived, and the resulting partial differential equations solved numerically. An asymptotic solution is found for high evaporation rate. It is found that the final film structure is governed by the relative magnitudes of the diffusive and diffusiophoretic terms. Two methods are discovered to control the resulting stratification: (i) setting the surface charge on the particles, and (ii) setting the background salt concentration. Either of these can be used to select either small- or large-on-top stratification or a homogenous film. The diffusiophoretic term promotes small-on-top stratification, and so may account for experimental observations of accumulated small particles at the top surface of dried films.

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Quantitative imaging methods for heterogeneous multi-component films

Abstract: We describe and compare three label-free methods to quantitatively visualize the composition of complex coatings, elucidating segregation patterns such as component layering.

Cited by 3 publications

References 35 publications

Single droplet drying of dairy‐based systems at spray drying like temperature–time trajectories

Single droplet drying of dairy‐based systems at spray drying like temperature–time trajectories

Self-stratification and phase separation in drying binary colloidal films

Stratification in drying films: diffusiophoresis driven by nanoparticles and their counterions

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