Fabrication, characterization, and emulsifying properties of hexadecyltrimethylammonium bromide complexed alginate microgel
Fabrication, characterization, and emulsifying properties of hexadecyltrimethylammonium bromide complexed alginate microgel
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DOI：
10.1016/j.foodhyd.2023.108607
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发表时间：
2023-02
影响因子：
10.7
通讯作者：
Wenxin Jiang;W. Xiang;Longquan Xu;Dan Yuan;Zhiming Gao;Bing Hu;Yanlei Li;Yuehan Wu
中科院分区：
文献类型：
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作者：
Wenxin Jiang;W. Xiang;Longquan Xu;Dan Yuan;Zhiming Gao;Bing Hu;Yanlei Li;Yuehan Wu
本研究制备了海藻酸盐微凝胶（AMs）与十六烷基三甲基溴化铵（CTAB）的配合物（CAMs），并将其用于油水乳状液的稳定。研究了不同CTAB浓度的am的物理性质和乳化能力，表明CTAB可以大幅度提高am的乳化能力。CAMs稳定乳状液抗离心（3000 rpm）、pH值（2.0-8.0）和NaCl浓度（0-200 mM）的稳定性也有所提高。界面吸附和形貌观察表明，CTAB络合有利于CAMs的界面活性，在CAMs稳定油滴表面可以观察到界面层。在本研究中，即使是少量的表面活性剂（0.4 mM，或0.01456 wt% CTAB）也能显著改善海藻酸盐微凝胶的乳化性能。但过量的CTAB会导致am过度聚集，不利于am的乳化性能。本研究提出，表面活性剂络合是提高多糖微凝胶乳化性能的可行策略。
In the current study, complexes (CAMs) of alginate microgels (AMs) and hexadecyltrimethylammonium bromide (CTAB) were prepared, and further used to stabilize O/W emulsions. Physical properties and emulsifying capacity of CAMs with different CTAB concentration were investigated, which indicated emulsifying capacity of AMs could be extensively improved by CTAB. Improved stability against centrifugation (3000 rpm), pH value (2.0–8.0), and NaCl concentration (0–200 mM) was also reported in CAMs stabilized emulsions. Interfacial adsorption and morphology observation suggested that the interfacial activities of CAMs were benefited from CTAB complexing, and an interfacial layer could be observed on the surface of the CAMs stabilized oil droplets. In this work, even a slight amount of surfactant (0.4 mM, or 0.01456 wt% CTAB) could make remarkable improvement on the emulsifying performance of alginate microgels. However, excessive CTAB would result in over aggregation of AMs, which was not conducive to the emulsifying performance of CAMs. This study proposed that the surfactant complexing was a feasible strategy to improve the emulsifying performance of polysaccharide microgels.