HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Internal stress effect induced by drying in starch-based composite films

Abstract : Starch films containing eicosane droplets with diameters of 3-5 mu m homogeneously distributed over the thickness were prepared using the casting method. The films also contain a quantity of water (4-22%) depending on the relative humidity during conditioning (from 7% to 90%, respectively). The calorimetric behavior of dispersed eicosane droplets, studied by Differential Scanning Calorimetry, shows a shift in the melting temperature (T-m) of about 12 degrees C above the T-m of pure eicosane, which is 35.8 degrees C. This shift depends on the relative humidity during the conditioning of glassy starch films. The shift is also revealed by dynamic mechanical analysis and temperature-controlled X-ray analysis. The diffractogram did not show crystal structure changes associated with temperature shift. Based on the Pressure-Temperature phase diagram of eicosane, the temperature shift can be attributed to an internal pressure of up to 50 MPa on eicosane droplets, applied during starch drying.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-02895903
Contributor : Christopher Lallemant Connect in order to contact the contributor
Submitted on : Friday, July 10, 2020 - 11:12:36 AM
Last modification on : Thursday, January 13, 2022 - 3:12:02 PM

Identifiers

Collections

Citation

Tatiya Trongsatitkul, Clara Jimenez-Saelices, Bruno Pontoire, Isabelle Capron, Denis Lourdin. Internal stress effect induced by drying in starch-based composite films. European Polymer Journal, Elsevier, 2019, 121, pp.109261. ⟨10.1016/j.eurpolymj.2019.109261⟩. ⟨hal-02895903⟩

Share

Metrics

Record views

10