Improved transparency switching in paraffin-PDMS composites (Articolo in rivista)

Type
Label
  • Improved transparency switching in paraffin-PDMS composites (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/C4TC02546F (literal)
Alternative label
  • Apostoleris, Harry Nicholas and Chiesa, Matteo and Stefancich, Marco (2014)
    Improved transparency switching in paraffin-PDMS composites
    in journal of material chemistry
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Apostoleris, Harry Nicholas and Chiesa, Matteo and Stefancich, Marco (literal)
Pagina inizio
  • 1371 (literal)
Pagina fine
  • 1377 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Masdar Institute of Science and Technology, Masdar, Abu Dhabi, United Arab Emirates IMEM-CNR, Institute for Material for Electronics and Magnetism, National Research Council, Parma (Italy) (literal)
Titolo
  • Improved transparency switching in paraffin-PDMS composites (literal)
Abstract
  • Composites of paraffin wax and polydimethylsioxane (PDMS) have previously been demonstrated to exhibit thermally-induced switching between a transparent 'on' state and opaque 'off' state; however, the transmittance of the on state in previously investigated composites was found to decrease with increasing wax content, limiting the achievable off-on contrast. We present a new paraffin-PDMS composite formulation that exhibits essentially no decrease in on-state transparency up to a 10% wax concentration. We furthermore identify the underlying cause of the switching as a microstructural transformation from a homogeneous, transparent state to an inhomogeneous, light-scattering state as a result of the phase transition of the paraffin. We then present a model based on the theory of turbid media that allows for the estimation of the scattering power of a composite of known composition based on easily observed parameters, and suggests ways in which the contrast between the on and off states may be further enhanced. (literal)
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