Tuning the Interfacial Deformation of Gliadin-Flaxseed Gum Complex Particles for Improving the Foam Stability

文献类型： 外文期刊

第一作者： Wu, Ping

作者： Wu, Ping;Shang, Wei;Shao, Jiaqi;Deng, Qianchun;Zhou, Jisong;Xiang, Xia;Peng, Dengfeng;Shang, Wei;Zhou, Jisong;Jin, Weiping

作者机构：

关键词： gliadin; flaxseed gum; particle flexibility; gel-like network structure; air/water interface; Lissajous plots; foam stability

期刊名称：GELS （ 影响因子：5.3； 五年影响因子：5.4 ）

ISSN：

年卷期： 2024 年 10 卷 11 期

页码：

收录情况： SCI

摘要： Gliadin nanoparticle (GNP) is a promising foaming agent, but its application is hindered by the limited foam stability under low acidic conditions. Herein, we attempted to tune the foam stability of GNP by coating it with flaxseed gum (FG) and investigated the structure, interfacial behaviors, and foam functionality of gliadin-FG (GFG) particles at pH 4.5. Results showed that the formation of GFG complex particles was driven by an electrostatic interaction between positive charge patches on the surface of GNP (similar to 17 mV) and negative charges in FG molecule (similar to-13 mV) at all tested ratios. The addition of appropriate amounts of FG (1:0.05) effectively improved the foam stability of GNP. This was because GFG with larger sizes and lower surface charge possessed higher rigidity after coating with FG. When they adsorbed at the air/water interface, their deformation process was slower than that of GNP, as indicated by interfacial dilatational rheology and cryo-SEM, and the covered particles seemed to be more closely distributed to form solid-like and dense interfacial films. Notably, the addition of FG at a higher ratio (1:0.3) promoted the foam stability of GNP by about five folds because the larger GFG with suitable flexibility and wettability could form a stiff interface layer with more significant elastic response, and the unabsorbed particles and FG could form a gel-like network structure in the continuous phase. These characteristics effectively prevented foam disproportionation and coalescence, as well as retard the drainage. Our findings demonstrate that coating GNPs with FG is an effective approach to improve their application in foamed foods.

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