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Bulk, Foam, and Interfacial Properties of Tannic Acid/Sodium Caseinate Nanocomplexes
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2018-06-08 00:00:00 , DOI: 10.1021/acs.jafc.8b00503 Fuchao Zhan 1, 2 , Jing Li 1, 2 , Yuntao Wang 3 , Minqi Shi 1 , Bin Li 1, 2 , Feng Sheng 4
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2018-06-08 00:00:00 , DOI: 10.1021/acs.jafc.8b00503 Fuchao Zhan 1, 2 , Jing Li 1, 2 , Yuntao Wang 3 , Minqi Shi 1 , Bin Li 1, 2 , Feng Sheng 4
Affiliation
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For this work, the aim was to investigate the adsorption of the tannic acid (TA)/sodium caseinate (SC) nanocomplexes at the air/water interface and then to research its relationship with foam properties. First, nanocomplexes were prepared in a different mass ratio of TA and SC. The bulk behavior of nanocomplexes was evaluated by dynamic light scattering (DLS), signal-intensifying fluorescence probe (ANS), etc. As the concentration of TA increased, the z-average siameter (Dz) of TA/SC nanocomplexes decreased gradually and the negative charge increased. Meanwhile, the surface hydrophobicity (So) of the SC also decreased after the addition of TA. The interfacial properties were determined by dynamic surface tension and dilational rheology. The presence of polyphenols decreased the surface pressure (π) that resulted in poor foamability. However, the elastic (Ed) component of the dilational modulus of films also increased as polyphenols concentration increased, which gave rise to admirable foam stability. The contribution of polyphenols to stabilize foam columns may be caused by interfacial interaction between proteins and polyphenols.
中文翻译：
单宁酸/酪蛋白酸钠纳米复合物的体积，泡沫和界面性质
对于这项工作，目的是研究单宁酸（TA）/酪蛋白酸钠（SC）纳米复合物在空气/水界面的吸附，然后研究其与泡沫性能的关系。首先，以不同质量比的TA和SC制备纳米复合物。纳米复合物的整体行为通过动态光散射（DLS），信号增强荧光探针（ANS）等进行评估。随着TA浓度的增加，TA / SC纳米复合物的z平均直径（D z）逐渐减小，并且负电荷增加。同时，表面疏水性（S o添加TA后SC的）也降低了。界面性质由动态表面张力和膨胀流变学确定。多酚的存在降低了表面压力（π），导致差的发泡性。然而，随着多酚浓度的增加，膜的膨胀模量的弹性（E d）成分也增加，这产生了令人钦佩的泡沫稳定性。多酚对稳定泡沫柱的贡献可能是由于蛋白质和多酚之间的界面相互作用引起的。
更新日期：2018-06-08
中文翻译：
单宁酸/酪蛋白酸钠纳米复合物的体积，泡沫和界面性质
对于这项工作，目的是研究单宁酸（TA）/酪蛋白酸钠（SC）纳米复合物在空气/水界面的吸附，然后研究其与泡沫性能的关系。首先，以不同质量比的TA和SC制备纳米复合物。纳米复合物的整体行为通过动态光散射（DLS），信号增强荧光探针（ANS）等进行评估。随着TA浓度的增加，TA / SC纳米复合物的z平均直径（D z）逐渐减小，并且负电荷增加。同时，表面疏水性（S o添加TA后SC的）也降低了。界面性质由动态表面张力和膨胀流变学确定。多酚的存在降低了表面压力（π），导致差的发泡性。然而，随着多酚浓度的增加，膜的膨胀模量的弹性（E d）成分也增加，这产生了令人钦佩的泡沫稳定性。多酚对稳定泡沫柱的贡献可能是由于蛋白质和多酚之间的界面相互作用引起的。
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