Predicting phase separation in aqueous PEO35-Dextran100 mixtures using a virial expansion

Research output: Contribution to conferencePoster

Abstract

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.
Original languageEnglish
Publication statusPublished - 24 May 2018
Event16th Conference of the International Association of Colloids and Interface Scientists (IACIS) - Postillion Convention Centre, Rotterdam, Netherlands
Duration: 21 May 201825 May 2018
http://www.iacis2018.org

Conference

Conference16th Conference of the International Association of Colloids and Interface Scientists (IACIS)
CountryNetherlands
CityRotterdam
Period21/05/1825/05/18
Internet address

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    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.