Influence of freezing temperature and maltodextrin concentration on stability of linseed oil-in-water multilayer emulsions
The effect of maltodextrin (MDX) concentration on the stability of multilayer linseed oil-in-water emulsions before and after freeze-thawing has been studied. Interfacial double-layer emulsions were obtained by performing electrostatic deposition of sodium alginate (SA) onto whey protein isolate (WP...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v156_n_p31_Fioramonti http://hdl.handle.net/20.500.12110/paper_02608774_v156_n_p31_Fioramonti |
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paper:paper_02608774_v156_n_p31_Fioramonti2023-06-08T15:22:20Z Influence of freezing temperature and maltodextrin concentration on stability of linseed oil-in-water multilayer emulsions Pilosof, Ana María Renata Alginate Layer by layer deposition Linseed oil Maltodextrin Multilayer emulsion Whey protein Alginate Deposition Drops Drying oils Emulsions Freezing Multilayers Oil shale Oilseeds Phase separation Polysaccharides Proteins Stability Thawing Back-scattering profiles Electrostatic deposition Interfacial membranes Layer by layer deposition Linseed oil Macroscopic phase separation Maltodextrins Whey proteins Emulsification The effect of maltodextrin (MDX) concentration on the stability of multilayer linseed oil-in-water emulsions before and after freeze-thawing has been studied. Interfacial double-layer emulsions were obtained by performing electrostatic deposition of sodium alginate (SA) onto whey protein isolate (WPI) coated oil droplets at pH 5 (10 wt% oil, 1 wt% WPI 0.25 wt% SA). MDX was also added to emulsions formulation in different concentrations (0-20 wt%), and the systems were then stored at two freezing temperatures (-18 and -80 °C). Stability of emulsions was studied using droplet size, ζ-potential, as well as microstructure determinations and monitoring backscattering profiles versus time. Non-frozen emulsions showed smaller droplet sizes at higher MDX concentrations thus reducing creaming mechanisms and improving emulsion stability. In the absence of MDX, emulsions were highly unstable after freeze-thawing and destabilized faster at -18 °C than at -80 °C, which was attributed to the formation of larger ice crystals at slower freezing rates that promoted interfacial membrane disruption leading to extensive droplet coalescence and oiling off. Both systems showed macroscopic phase separation within the first hour of analysis. The addition of MDX greatly improved emulsion stability after freezing, as emulsions showed no phase separation after thawing during one week storage. This behavior was attributed to MDX cryoprotectant effect, that could have considerably reduce the amount of ice formed during freezing, thereby maintaining the integrity of the interfacial WPI-SA bilayer surrounding oil droplets. Our results suggest that 20 wt% MDX emulsions were the most stable systems both to creaming destabilization and to freeze-thawing processes. © 2015 Elsevier Ltd. All rights reserved. Fil:Pilosof, A.M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v156_n_p31_Fioramonti http://hdl.handle.net/20.500.12110/paper_02608774_v156_n_p31_Fioramonti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Alginate Layer by layer deposition Linseed oil Maltodextrin Multilayer emulsion Whey protein Alginate Deposition Drops Drying oils Emulsions Freezing Multilayers Oil shale Oilseeds Phase separation Polysaccharides Proteins Stability Thawing Back-scattering profiles Electrostatic deposition Interfacial membranes Layer by layer deposition Linseed oil Macroscopic phase separation Maltodextrins Whey proteins Emulsification |
| spellingShingle |
Alginate Layer by layer deposition Linseed oil Maltodextrin Multilayer emulsion Whey protein Alginate Deposition Drops Drying oils Emulsions Freezing Multilayers Oil shale Oilseeds Phase separation Polysaccharides Proteins Stability Thawing Back-scattering profiles Electrostatic deposition Interfacial membranes Layer by layer deposition Linseed oil Macroscopic phase separation Maltodextrins Whey proteins Emulsification Pilosof, Ana María Renata Influence of freezing temperature and maltodextrin concentration on stability of linseed oil-in-water multilayer emulsions |
| topic_facet |
Alginate Layer by layer deposition Linseed oil Maltodextrin Multilayer emulsion Whey protein Alginate Deposition Drops Drying oils Emulsions Freezing Multilayers Oil shale Oilseeds Phase separation Polysaccharides Proteins Stability Thawing Back-scattering profiles Electrostatic deposition Interfacial membranes Layer by layer deposition Linseed oil Macroscopic phase separation Maltodextrins Whey proteins Emulsification |
| description |
The effect of maltodextrin (MDX) concentration on the stability of multilayer linseed oil-in-water emulsions before and after freeze-thawing has been studied. Interfacial double-layer emulsions were obtained by performing electrostatic deposition of sodium alginate (SA) onto whey protein isolate (WPI) coated oil droplets at pH 5 (10 wt% oil, 1 wt% WPI 0.25 wt% SA). MDX was also added to emulsions formulation in different concentrations (0-20 wt%), and the systems were then stored at two freezing temperatures (-18 and -80 °C). Stability of emulsions was studied using droplet size, ζ-potential, as well as microstructure determinations and monitoring backscattering profiles versus time. Non-frozen emulsions showed smaller droplet sizes at higher MDX concentrations thus reducing creaming mechanisms and improving emulsion stability. In the absence of MDX, emulsions were highly unstable after freeze-thawing and destabilized faster at -18 °C than at -80 °C, which was attributed to the formation of larger ice crystals at slower freezing rates that promoted interfacial membrane disruption leading to extensive droplet coalescence and oiling off. Both systems showed macroscopic phase separation within the first hour of analysis. The addition of MDX greatly improved emulsion stability after freezing, as emulsions showed no phase separation after thawing during one week storage. This behavior was attributed to MDX cryoprotectant effect, that could have considerably reduce the amount of ice formed during freezing, thereby maintaining the integrity of the interfacial WPI-SA bilayer surrounding oil droplets. Our results suggest that 20 wt% MDX emulsions were the most stable systems both to creaming destabilization and to freeze-thawing processes. © 2015 Elsevier Ltd. All rights reserved. |
| author |
Pilosof, Ana María Renata |
| author_facet |
Pilosof, Ana María Renata |
| author_sort |
Pilosof, Ana María Renata |
| title |
Influence of freezing temperature and maltodextrin concentration on stability of linseed oil-in-water multilayer emulsions |
| title_short |
Influence of freezing temperature and maltodextrin concentration on stability of linseed oil-in-water multilayer emulsions |
| title_full |
Influence of freezing temperature and maltodextrin concentration on stability of linseed oil-in-water multilayer emulsions |
| title_fullStr |
Influence of freezing temperature and maltodextrin concentration on stability of linseed oil-in-water multilayer emulsions |
| title_full_unstemmed |
Influence of freezing temperature and maltodextrin concentration on stability of linseed oil-in-water multilayer emulsions |
| title_sort |
influence of freezing temperature and maltodextrin concentration on stability of linseed oil-in-water multilayer emulsions |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v156_n_p31_Fioramonti http://hdl.handle.net/20.500.12110/paper_02608774_v156_n_p31_Fioramonti |
| work_keys_str_mv |
AT pilosofanamariarenata influenceoffreezingtemperatureandmaltodextrinconcentrationonstabilityoflinseedoilinwatermultilayeremulsions |
| _version_ |
1768545186132000768 |