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Title

Structural and physicochemical characterization of thermoplastic corn starch films containing microalgae

AuthorsFabra, María José ; Martínez-Sanz, Marta; Gómez-Mascaraque, Laura G. ; Gavara, Rafael ; López-Rubio, Amparo
KeywordsSpirulina
Scenedesmus
Nanochloropsis
Barrier properties
Tensile properties
SAXS/WAXS
Issue Date12-Jan-2018
PublisherElsevier
CitationCarbohydrate Polymers 186: 184-191 (2018)
AbstractThis work provides an in-depth analysis on how the addition of different microalgae species (Nannochloropsis, Spirulina and Scenedesmus) affected the structural and physicochemical properties of thermoplastic corn starch biocomposites. Structural characterization was conducted by combined SAXS/WAXS experiments and it was correlated with mechanical and barrier properties of the biocomposites. A water vapour permeability drop of ca. 54% was observed upon addition of the different microalgae species. The oxygen permeability and the mechanical properties of biocomposites containing Spirulina or Scenedesmus were not improved since the presence of microalgae hindered the re-arrangement and packing of the lamellar structure of starch polymeric chains, according to the SAXS results. Nannochloropsis caused a great reduction of the matrix rigidity and, the oxygen permeability was also improved. Therefore, all of these features make the Nannochloropsis biocomposites an alternative to generate biodegradable food packaging materials with the additional advantage that they can be easily scaled-up.
Publisher version (URL)https://doi.org/10.1016/j.carbpol.2018.01.039
URIhttp://hdl.handle.net/10261/160813
DOI10.1016/j.carbpol.2018.01.039
ISSN0144-8617
Appears in Collections:(IATA) Artículos
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