Proteins and polysaccharides, often referred to as biopolymers, are essential building blocks of food systems. These biopolymers have a strong tendency to phase separate, which can be useful to structure foods and to impose specific food structures. The prediction of the extent of phase separation is therefore important to control properties of food systems. In this study, phase separation was specifically studied for aqueous polyethylene oxide (PEO35) and dextran100 at pH 6.8 (20oC). An experimental phase diagram was determined from 234 mixtures of PEO35-dextran100, covering the 1-phase and 2-phase region. Second virial coefficients using membrane osmometry were determined for the PEO35 and dextran100. The values were then used to predict their phase behaviour. We build on previous work following the same approach (Ersch et al., 2016a, Ersch et al., 2016b). The phase diagram as predicted from our second virial approach is in a good agreement with the experimentally determined phase diagram.
|Publication status||Published - 24 May 2018|
|Event||16th Conference of the International Association of Colloids and Interface Scientists (IACIS) - Postillion Convention Centre, Rotterdam, Netherlands|
Duration: 21 May 2018 → 25 May 2018
|Conference||16th Conference of the International Association of Colloids and Interface Scientists (IACIS)|
|Period||21/05/18 → 25/05/18|
Dewi, B. P. C., Venema, P., & van der Linden, E. (2018). Predicting phase separation in aqueous PEO35-Dextran100 mixtures using a virial expansion. Poster session presented at 16th Conference of the International Association of Colloids and Interface Scientists (IACIS), Rotterdam, Netherlands.