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Updated: Jul 27, 2025

Extraction of Plant-based Capsules for Microencapsulation Applications
Published on: November 9, 2016
On surface composition and stability of β-carotene microcapsules comprising pea/whey protein complexes by
Woojeong Kim1, Yong Wang1, Jitraporn Vongsvivut2
1School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia.
Abstract:
This study aims to elucidate the stability of spray dried β-carotene microcapsules by identifying their surface composition using synchrotron-Fourier transform infrared (FTIR) microspectroscopy. To investigate the impact of enzymatic cross-linking and polysaccharide addition on heteroprotein, three wall materials were prepared: pea/whey protein blends (Con), cross-linked pea/whey protein blends (TG), and cross-linked pea/whey protein blends-maltodextrin complex (TG-MD). The TG-MD exhibited the highest encapsulation efficiency (>90 %) after 8 weeks of storage followed by TG and Con. Chemical images obtained using synchrotron-FTIR microspectroscopy confirmed that the TG-MD displayed the least amount of surface oil, followed by TG and Con, due to increasing amphiphilic β-sheet structure of the proteins led by cross-linking and maltodextrin addition. Both enzymatic cross-linking and polysaccharide addition improved the stability of β-carotene microcapsules, demonstrating that pea/whey protein blends with maltodextrin can be utilised as a hybrid wall material for enhancing the encapsulation efficiency of lipophilic bioactive compounds in foods.
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