Impact of biopolymers use on physico-chemical stability of blue maize extract microencapsulates
Autori
Ćujić Nikolić, NadaŽilić, Slađana
Mutavski, Zorana
Simić, Marijana
Nikolić, Valentina
Markovic, Smilja
Šavikin, Katarina
Konferencijski prilog (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Blue maize is a rich source of anthocyanins which could demonstrate many beneficial effects on
human health and the prevention of various diseases associated with oxidative stress. Cereal
processing could generate a large amount of anthocyanins-rich waste products. However,
anthocyanins incorporation into food is a technological challenge due to their low stability. The
stability of these extracted valuable bioactive compounds from harmful environmental influences
(oxygen, light, water) can be preserved by the encapsulation technique, which could entrap them
inside a coating material. Microencapsulation technique could improve bioavailability, mask
undesirable organoleptic characteristics of polyphenols and anthocyanins, making them more
usable and represented in diet foods and as nutraceuticals. Spray drying process is one of the
most widely used microencapsulation technique due to its simplicity, efficiency, and low
operational costs. Nowadays, the accent is on the utilizat...ion of novel carrier agents with unique
properties, such as hydroxypropyl-β-cyclodextrin-(HPBCD). The aim of the present research was
to develop and examine microencapsulation systems of blue maize extract using a conventional
biopolymer as a maltodextrin, in combination with a novel one, HPBCD, in order to obtain
powders with appropriate organoleptic and pharmacological characteristics. The waste product of
blue maize processing was used for anthocyanins extraction. Liquid blue maize extract was spray
dried with and without adding carrier agents: MD (30%), HPBCD (30 %), and a combination of
both carriers (15% MD and 15% HPBCD). The obtained spray-dried maize extracts (SME) were
analyzed by the physico-chemical powder properties, particle size, Fourier-transform infrared
analysis (FTIR), and differential scanning calorimetry (DSC), in order to examine preservation of
blue maize extract. The diameter of spray-dried microparticles varied from 2.22 (d10) for
SME+MD to 257.14 μm (d90) for SME+MD+HPBCD, respectively, with the mean average
diameter d50 ranged from 4.72 to 21.33 μm for all microencapsulated powders. The encapsulation
of the blue maize extract with carriers such as MD and HPBCD did not create meaningful
changes, which is according to the literature indication for a successful microencapsulation
process. Therefore, spray drying process did not change the structure of the polymer matrix and
extract according to the FTIR analysis, indicating that the anthocyanins microencapsulation was
developed by physical incorporation. DSC analysis signified that spray drying technique
developed powders with high thermal stability and up to 200◦C, related to the increasing stability
with the addition of biopolymer material. The used biopolymers showed a good impact on the
stability of microencapsulates of blue maize extract. Additionally, HPBCD provided an
improvement in the physico-chemical characteristics of the powders.
Ključne reči:
Blue maize / Waste / Microencapsulation / Spray drying / Characterization / Functional carriersIzvor:
2nd Green International Conference, 21-23 March, 2023, Valladolid, Spain, Book of Abstracts, 2023, 50-Izdavač:
- Valladolid : Instituto de bioeconomia
Finansiranje / projekti:
- Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, institucionalno finansiranje - 200040 (Institut za kukuruz 'Zemun polje', Beograd-Zemun) (RS-MESTD-inst-2020-200040)