Abstract：
The effects of oil type, emulsifier type, and emulsion particle size on the texture, gel strength, and rheological properties of SPI emulsion-filled gel (SPI-FG) and TFSP emulsion-filled gel (TFSP-FG) were investigated. Using soybean protein isolate or sodium caseinate as emulsifiers, emulsions with cocoa butter replacer (CBR), palm oil (PO), virgin coconut oil (VCO), and canola oil (CO) as oil phases were prepared. These emulsions were filled into SPI and TFSP gel substrates to prepare emulsion-filled gels. Results that the hardness and gel strength of both gels increased with increasing emulsion content when CBR was used as the emulsion oil phase. However, when the other three liquid oils were used as the oil phase, the hardness and gel strength of TFSP-FG decreased with the increasing of emulsion content, but those of SPI-FG increased when SPI was used as emulsifier. Additionally, the hardness and gel strength of both TFSP-FG and SPI-FG increased with the decreasing of mean particle size of emulsions. Rheological measurements were consistent with textural measurements and found that compared with SC, TFSP-FG, and SPI-FG showed higher G\' values when SPI was used as emulsifier. Confocal laser scanning microscopy (CLSM) observation showed that the distribution and stability of emulsion droplets in TFSP-FG and SPI-FG were influenced by the oil type, emulsifier type and emulsion particle size. SPI-stabilized emulsion behaved as active fillers in SPI-FG reinforcing the gel matrix; however, the gel matrix of TFSP-FG still had many void pores when SPI-stabilized emulsion was involved. In conclusion, compared to SPI-FG, the emulsion filler effect that could reinforce gel networks became weaker in TFSP-FG.
摘要：
油型的影响，乳化剂类型,和质地上的乳液颗粒大小，凝胶强度,研究了SPI乳液填充凝胶(SPI-FG)和TFSP乳液填充凝胶(TFSP-FG)的流变性能。使用大豆分离蛋白或酪蛋白酸钠作为乳化剂，含有可可脂替代品（CBR）的乳液，棕榈油（PO），初榨椰子油（VCO），制备了作为油相的菜籽油(CO)。将这些乳液填充到SPI和TFSP凝胶基底中以制备乳液填充的凝胶。结果当CBR用作乳液油相时，两种凝胶的硬度和凝胶强度都随着乳液含量的增加而增加。然而,当其他三种液体油用作油相时，随着乳液含量的增加，TFSP-FG的硬度和凝胶强度降低，但是当SPI用作乳化剂时，SPI-FG的含量增加。此外,随着乳液平均粒径的减小，TFSP-FG和SPI-FG的硬度和凝胶强度均增加。流变测量与纹理测量一致，发现与SC相比，TFSP-FG,当SPI用作乳化剂时，SPI-FG显示出较高的G'值。共聚焦激光扫描显微镜（CLSM）观察表明，乳液液滴在TFSP-FG和SPI-FG中的分布和稳定性受到油型的影响，乳化剂类型和乳液粒径。SPI稳定的乳液在SPI-FG中表现为增强凝胶基质的活性填料；然而，当涉及SPI稳定的乳液时，TFSP-FG的凝胶基质仍然具有许多空隙孔。总之,与SPI-FG相比，在TFSP-FG中，可以增强凝胶网络的乳液填料效应变弱。
