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. 2024 Apr 27;29(9):2019.
doi: 10.3390/molecules29092019.

Microencapsulation of Essential Oils Using Faba Bean Protein and Chia Seed Polysaccharides via Complex Coacervation Method

Alicja Napiórkowska  1 , Arkadiusz Szpicer  1 , Elżbieta Górska-Horczyczak  1 , Marcin Andrzej Kurek  1
Affiliations

Microencapsulation of Essential Oils Using Faba Bean Protein and Chia Seed Polysaccharides via Complex Coacervation Method

Alicja Napiórkowska et al. Molecules. .

Abstract

The aim of this study was to develop microcapsules containing juniper or black pepper essential oils, using a combination of faba bean protein and chia seed polysaccharides (in ratios of 1:1, 1:2, 2:1). By synergizing these two polymers, our goal was to enhance the efficiency of essential oil microencapsulation, opening up various applications in the food industry. Additionally, we aimed to investigate the influence of different polymer mixing ratios on the properties of the resulting microcapsules and the course of the complex coacervation process. To dissolve the essential oils and limit their evaporation, soybean and rapeseed oils were used. The powders resulting from the freeze-drying of coacervates underwent testing to assess microencapsulation efficiency (65.64-87.85%), density, flowability, water content, solubility, and hygroscopicity. Additionally, FT-IR and DSC analyses were conducted. FT-IR analysis confirmed the interactions between the components of the microcapsules, and these interactions were reflected in their high thermal resistance, especially at a protein-to-polysaccharide ratio of 2:1 (177.2 °C). The water content in the obtained powders was low (3.72-7.65%), but it contributed to their hygroscopicity (40.40-76.98%).

Keywords: chia mucilage; complex coacervation; essential oil; faba bean.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
FT-IR spectra for samples RJ1, RJ2, RJ3.
Figure 2
Figure 2
FT-IR spectra for samples RB1, RB2, RB3.
Figure 3
Figure 3
FT-IR spectra for samples SJ1, SJ2, SJ3.
Figure 4
Figure 4
FT-IR spectra for samples SB1, SB2, SB3.
Figure 5
Figure 5
Smell pattern chart.
See this image and copyright information in PMC

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