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Article

Spray-Drying Performance and Thermal Stability of L-ascorbic Acid Microencapsulated with Sodium Alginate and Gum Arabic

1
R&D Department, Leitat Chile, Calle Román Díaz 532, Providencia, Santiago 7500724, Chile
2
Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València (UPV), Camino de Vera s/n, 46022 Valencia, Spain
3
Departament d’Enginyeria Química, Escola Tècnica Superior d’Enginyeria, Universitat de València, Av. de la Universitat, s/n, 46100 Burjassot, Spain
4
Centro de Excelencia en Nanotecnología (CEN) Chile, Calle Román Diaz 532, Providencia, Santiago 7500724, Chile
5
Materials Chemistry Division, Leitat Technological Center, C/Pallars 179–185, 08005 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Molecules 2019, 24(16), 2872; https://doi.org/10.3390/molecules24162872
Received: 19 June 2019 / Revised: 5 July 2019 / Accepted: 7 July 2019 / Published: 7 August 2019
The potential of sodium alginate (ALG) and gum arabic (GA) as wall polymers for L-ascorbic acid (AA) encapsulation as a tool for their preservation against the thermo-oxidative degradation was investigated. The influence of such polymers used as wall material on the AA-content, size, encapsulation efficiency, encapsulation yield and thermo-oxidative stability were evaluated. The AA-microparticles were obtained using the spray-drying technique. An experimental Taguchi design was employed to assess the influence of the variables in the encapsulation process. The microparticles morphology and size distribution were characterized by scanning electron microscopy and laser diffraction. The thermal stability of AA microparticles was studied by differential scanning calorimetry and thermogravimetry analysis. This work points out the viability to encapsulate AA using GA and ALG through a spray-drying process. In general, a product yield ranging from 35.1% to 83.2% and an encapsulation efficiency above 90% were reached. Spherical microparticles with a smooth surface were obtained with a mean diameter around 6 μm and 9 μm for the those prepared with GA and ALG, respectively. The thermo-oxidative analysis showed that both polymers allow maintaining AA stable up to 188 °C, which is higher than the traditional processing temperature used in the fish feed industry. View Full-Text
Keywords: L-ascorbic acid; sodium alginate; gum arabic; spray-drying; encapsulation L-ascorbic acid; sodium alginate; gum arabic; spray-drying; encapsulation
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MDPI and ACS Style

Barra, P.A.; Márquez, K.; Gil-Castell, O.; Mujica, J.; Ribes-Greus, A.; Faccini, M. Spray-Drying Performance and Thermal Stability of L-ascorbic Acid Microencapsulated with Sodium Alginate and Gum Arabic. Molecules 2019, 24, 2872. https://doi.org/10.3390/molecules24162872

AMA Style

Barra PA, Márquez K, Gil-Castell O, Mujica J, Ribes-Greus A, Faccini M. Spray-Drying Performance and Thermal Stability of L-ascorbic Acid Microencapsulated with Sodium Alginate and Gum Arabic. Molecules. 2019; 24(16):2872. https://doi.org/10.3390/molecules24162872

Chicago/Turabian Style

Barra, Pabla A.; Márquez, Katherine; Gil-Castell, Oscar; Mujica, Javiera; Ribes-Greus, Amparo; Faccini, Mirko. 2019. "Spray-Drying Performance and Thermal Stability of L-ascorbic Acid Microencapsulated with Sodium Alginate and Gum Arabic" Molecules 24, no. 16: 2872. https://doi.org/10.3390/molecules24162872

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