naa a22 4500 510724620 CHVBK 20180411082930.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11947-012-0946-y doi (NATIONALLICENCE)springer-10.1007/s11947-012-0946-y Spray-Drying Microencapsulation of Polyphenol Bioactives: A Comparative Study Using Different Natural Fibre Polymers as Encapsulants [Elektronische Daten] [Dongxiao Sun-Waterhouse, Sandhya Wadhwa, Geoffrey Waterhouse] This research explores the spray-drying microencapsulation of polyphenols (PPs), quercetin and vanillin, using four different fibre polymers as encapsulants (sodium alginate, methyl β-cyclodextrin (MβCD), hydroxypropylmethyl cellulose (HPMC) and inulin). The microstructure, physico-chemical properties, PP content and reconstitution properties in water of the spray-dried powders were systematically evaluated and compared. Techniques used for powder characterisation were scanning electron microscopy, N2 physisorption, Fourier transform infrared (FT-IR) spectroscopy and water activity measurements. High-performance liquid chromatography and viscosity measurements were used to characterise the solutions obtained by reconstitution of the spray-dried powders in methanol or water, respectively. Results show that the type of encapsulant strongly influenced powder morphology, powder surface area and encapsulation efficiency of PPs. Powders prepared using sodium alginate and MβCD possessed more spherical particle shape, smaller average particle size and higher specific surface area than those using HPMC or inulin as encapsulants. For each encapsulant, higher encapsulation efficiencies were achieved for vanillin (37-53%) than quercetin (9-19%). Encapsulation efficiencies were inulin > MβCD > HPMC > sodium alginate for vanillin-containing powders. Inulin, MβCD and sodium alginate all gave similar encapsulation efficiencies for quercetin-containing powders. All powders possessed low water activity and excellent dissolution properties in water. Therefore, spray-drying microencapsulation using natural fibre encapsulants is a feasible approach for delivering the dual health benefits of PPs and dietary fibre to consumers. Spray-drying yields a product in a convenient powder form, which can be reconstituted in water or other beverages for direct consumption or used as a functional additive in solid food systems. Springer Science+Business Media, LLC, 2012 Hydroxypropylmethyl cellulose nationallicence Inulin nationallicence Methyl β -cyclodextrin nationallicence Quercetin nationallicence Sodium alginate nationallicence Vanillin nationallicence Sun-Waterhouse Dongxiao Mt. Albert Research Centre, The New Zealand Institute for Plant and Food Research Limited, Private Bag, 92169, Auckland, New Zealand aut Wadhwa Sandhya Mt. Albert Research Centre, The New Zealand Institute for Plant and Food Research Limited, Private Bag, 92169, Auckland, New Zealand aut Waterhouse Geoffrey School of Chemical Sciences, The University of Auckland, Private Bag, 92019, Auckland, New Zealand aut Food and Bioprocess Technology Springer US; http://www.springer-ny.com 6/9(2013-09-01), 2376-2388 1935-5130 6:9<2376 2013 6 11947 https://doi.org/10.1007/s11947-012-0946-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11947-012-0946-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sun-Waterhouse Dongxiao Mt. Albert Research Centre, The New Zealand Institute for Plant and Food Research Limited, Private Bag, 92169, Auckland, New Zealand aut NATIONALLICENCE 700 1- Wadhwa Sandhya Mt. Albert Research Centre, The New Zealand Institute for Plant and Food Research Limited, Private Bag, 92169, Auckland, New Zealand aut NATIONALLICENCE 700 1- Waterhouse Geoffrey School of Chemical Sciences, The University of Auckland, Private Bag, 92019, Auckland, New Zealand aut NATIONALLICENCE 773 0- Food and Bioprocess Technology Springer US; http://www.springer-ny.com 6/9(2013-09-01), 2376-2388 1935-5130 6:9<2376 2013 6 11947 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer