Preparation and stability characterization of soybean protein isolate/sodium alginate complexes-based nanoemulsions using high-pressure homogenization. (15th January 2022)

• Record Type: Journal Article
• Authors: Zhou, Yangying; Yue, Wenting; Luo, Yumin; Luo, Qing; Liu, Shuxiang; Chen, Hong; Qin, Wen; Zhang, Qing
• Is Part Of: Lebensmittel-Wissenschaft + Technologie =. Volume 154(2022)
• Publication Date: 2022-01-15
• Subjects: Soybean protein isolate -- Sodium alginate -- Nanoemulsions -- Homogenization; Food industry and trade -- Periodicals; Food -- Composition -- Periodicals; Microbiology -- Periodicals; Nutrition -- Periodicals; 664.005
• DOI: 10.1016/j.lwt.2021.112607
• Languages: English
• ISSNs: 0023-6438

Abstract

Abstract: Effects of sodium alginate (SA) and homogenization on the physicochemical properties of soybean protein isolate (SPI)-based nanoemulsions (NEs) were investigated. Results showed that SPI-based NEs added with 0.02%–0.06% (w/v) SA exhibited lesser mean particle size (<300 nm) and polydispersity index (<0.27), and greater absolute ζ-potential value (>33 mV) than the 0.08% or 0.10% SA-added SPI-based NEs. Moreover, high-pressure homogenization and addition of 0.02%–0.06% (w/v) SA relatively better enhanced SPI-based NEs' thermal stability, and storage stability. According to the changes in ζ-potential value and the characteristic infrared absorption peaks, SA can also combine with positive charges of SPI by electrostatic interactions under neutral conditions. Therefore, the combination of SA addition and homogenization has a potential to be used to stabilize SPI-based NEs, providing a promising method to develop innovative ingredients for the processing of food emulsions or materials for the encapsulation of bioactive compounds. Highlights: Moderate sodium alginate (SA) made SPI-based nanoemulsions (NEs) form small and even droplets. Enhanced apparent viscosity was observed in the 0.02%–0.06% SA-added SPI-based NEs. Improved thermal stability of SPI-based NEs was found when 0.02%–0.06% SA was added. 0.02%–0.06% SA-added NEs homogenized at 80–100 MPa exhibited a good storage stability.