Influence of the drying conditions on the particle distribution in particle filled polymer films: Experimental validation of predictive drying regime maps
| Autor: | S. Baesch, Wilhelm Schabel, Lorraine F. Francis, Kyle Price, Philip Scharfer |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science Scanning electron microscope Process Chemistry and Technology General Chemical Engineering Diffusion Composite number Evaporation Energy Engineering and Power Technology 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences chemistry Particle Composite material 0210 nano-technology Material properties Dispersion (chemistry) Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Chemical Engineering and Processing - Process Intensification. 123:138-147 |
| ISSN: | 0255-2701 |
| DOI: | 10.1016/j.cep.2017.10.018 |
| Popis: | Particles are frequently incorporated into a polymer coating to tailor material properties. For coatings prepared from a dispersion of particles in a polymer solution, it is essential to understand how drying conditions and dispersion composition influence the component distribution during drying. In a companion paper, a model was developed to predict the particle distribution during drying. Three different distributions were found depending on particle sedimentation, diffusion, or evaporation being dominant: (i) particles form a sediment, (ii) equal distribution throughout the film, (iii) particle accumulation at the surface. In this work we report on experimental investigations of the transient and final component distribution. In the partially dried film the distribution was investigated using cryogenic scanning electron microscopy (cryoSEM) and in the dry film 3D micro Raman spectroscopy was applied. The transient distributions show all three regimes predicted by the model with some deviations. Investigation of the dry film reveals that these distributions are visible in the dry film, but with a less distinct gradient. Overall the agreement between the model and the experiment was good, indicating that the model predictions are valuable for the design of compositions and conditions for controlling particle distribution in polymer-particle composite films. |
| Databáze: | OpenAIRE |
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