PMID- 34067254 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210626 IS - 2304-8158 (Print) IS - 2304-8158 (Electronic) IS - 2304-8158 (Linking) VI - 10 IP - 6 DP - 2021 May 22 TI - Foam Structure Preservation during Microwave-Assisted Vacuum Drying: Significance of Interfacial and Dielectric Properties of the Bulk Phase of Foams from Polysorbate 80-Maltodextrin Dispersions. LID - 10.3390/foods10061163 [doi] LID - 1163 AB - This study aimed at examining the cause of differences in the structure preservation of polysorbate 80-maltodextrin foams during microwave-assisted vacuum drying (MWVD) versus conventional vacuum drying (CVD). Aqueous dispersions of 3% polysorbate 80 and 0-40% maltodextrin were characterized for their dielectric and interfacial properties, and results were related to their drying performance in a foamed state. Surface tension and surface dilatational properties as well as dielectric properties clearly responded to the variation in the maltodextrin content. Likewise, the foam structure preservation during CVD was linked to the maltodextrin concentration. Regarding MWVD, however, foams collapsed at all conditions tested. Nevertheless, if the structure during MWVD remained stable, the drying time was significantly reduced. Eventually, this finding could be linked to the dielectric properties of polysorbate 80 rather than its adsorption kinetics and surface film viscoelasticity as its resonant frequency fell within the working frequency of the microwave drying plant. FAU - Kubbutat, Peter AU - Kubbutat P AUID- ORCID: 0000-0003-0519-4898 AD - Chair of Food and Bioprocess Engineering, TUM School of Life Science, Technical University of Munich, Weihenstephaner Berg 1, 85354 Freising, Germany. FAU - Kulozik, Ulrich AU - Kulozik U AUID- ORCID: 0000-0001-9598-9242 AD - Chair of Food and Bioprocess Engineering, TUM School of Life Science, Technical University of Munich, Weihenstephaner Berg 1, 85354 Freising, Germany. FAU - Dombrowski, Jannika AU - Dombrowski J AD - Chair of Food and Bioprocess Engineering, TUM School of Life Science, Technical University of Munich, Weihenstephaner Berg 1, 85354 Freising, Germany. AD - Nestle Research, Societe des Produits Nestle SA, Route du Jorat 57, 1000 Lausanne, Switzerland. LA - eng GR - AiF 18819 N/Forschungskreis der Ernahrungsindustrie e.V./ PT - Journal Article DEP - 20210522 PL - Switzerland TA - Foods JT - Foods (Basel, Switzerland) JID - 101670569 PMC - PMC8224648 OTO - NOTNLM OT - foam decay OT - polysaccharide OT - resonant frequency OT - surfactant OT - vacuum drying COIS- The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. EDAT- 2021/06/03 06:00 MHDA- 2021/06/03 06:01 PMCR- 2021/05/22 CRDT- 2021/06/02 01:18 PHST- 2021/03/24 00:00 [received] PHST- 2021/05/03 00:00 [revised] PHST- 2021/05/20 00:00 [accepted] PHST- 2021/06/02 01:18 [entrez] PHST- 2021/06/03 06:00 [pubmed] PHST- 2021/06/03 06:01 [medline] PHST- 2021/05/22 00:00 [pmc-release] AID - foods10061163 [pii] AID - foods-10-01163 [pii] AID - 10.3390/foods10061163 [doi] PST - epublish SO - Foods. 2021 May 22;10(6):1163. doi: 10.3390/foods10061163.