Lentil protein concentrate + pectin gels dried with SC-CO2: Influence of protein-polysaccharide interactions on the characteristics of aerogels

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI:10.1016/j.supflu.2023.106006

Srujana Mekala, Marleny D.A. Saldaña

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Abstract

This study investigated the interactions of lentil protein concentrate (LPC) and pectin hydrogels and their influence on the physico-chemical characteristics of aerogels. First, emulsion gels were formed using high-intensity ultrasound (HIUS) and the impact of HIUS nominal power, and concentrations of LPC and pectin on the gelation were evaluated. Then, the emulsion gels were dried using supercritical CO₂ (SC-CO₂) and the density, surface area, crystallinity index, microstructure and oil and water absorption capacities of the aerogels formed were evaluated. Overall, there was no significant effect of HIUS power on the viscoelastic behavior of the emulsion gels. The emulsion gels exhibited shear-thinning behavior and had thermo-reversible property. The FT-IR spectra of the aerogels showed predominant β-sheets, responsible for the non-covalent bond formation. The aerogels had semi-crystalline structure, densities of 0.0009–0.003 g/mm³ and surface area of 2.4–7.6 m²/g. The LPC-pectin interactions can be explored to form tailor-made aerogels for bioactive delivery.

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用SC-CO2干燥的扁豆浓缩蛋白+果胶凝胶:蛋白质-多糖相互作用对气凝胶特性的影响

本研究研究了扁豆浓缩蛋白（LPC）与果胶水凝胶的相互作用及其对气凝胶物理化学特性的影响。首先，使用高强度超声（HIUS）形成乳液凝胶，并评估HIUS标称功率以及LPC和果胶的浓度对凝胶化的影响。然后，使用超临界CO2（SC-CO2）干燥乳液凝胶，并评估所形成的气凝胶的密度、表面积、结晶度指数、微观结构以及吸油和吸水能力。总体而言，HIUS功率对乳液凝胶的粘弹性行为没有显著影响。乳液凝胶表现出剪切稀化行为，并具有热可逆性质。气凝胶的FT-IR光谱显示出主要的β-片，负责非共价键的形成。气凝胶具有半结晶结构，密度为0.0009–0.003 g/mm3，表面积为2.4–7.6 m2/g。可以探索LPC-果胶相互作用，以形成用于生物活性递送的特制气凝胶。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.