School of Perfume and Aroma Technology, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China.
Food Funct. 2019 May 22;10(5):2595-2604. doi: 10.1039/c8fo02002g.
Citral-loaded oil-in-water Pickering emulsions were fabricated with chitosan-tripolyphosphate particles (CS-TPP Ps) as stabilizers using a high-shear rotor homogenizer. The influence of the contents of CS-TPP Ps on the physical and chemical properties of the Pickering emulsions was investigated at 40 °C for 14 days. The morphology and chemical stability of the citral-loaded Pickering emulsions were determined by laser diffraction, optical microscopy, confocal laser scanning microscopy and solid-phase microextraction-gas chromatography (SPME-GC). Results showed that the droplet size of the Pickering emulsions decreased from 14.4 to 11 μm as the concentration of CS-TPP Ps increased. The droplet size of the Pickering emulsion with 0.6% w/v CS-TPP Ps remained unchanged during storage. GC illustrated that the Pickering emulsion with 0.6% w/v CS-TPP Ps showed the best chemical stability, with 52.33% citral remaining after 14 days of monitoring. Overall, the encapsulation of citral in CS-TPP Ps Pickering emulsions enhanced its chemical stability in acidic surroundings.
采用高剪切转子匀浆机，用壳聚糖-三聚磷酸钠颗粒（CS-TPP Ps）作为稳定剂制备了负载柠檬醛的油包水 Pickering 乳液。在 40°C 下放置 14 天，考察了 CS-TPP Ps 的含量对 Pickering 乳液物理化学性质的影响。通过激光衍射、光学显微镜、共聚焦激光扫描显微镜和固相微萃取-气相色谱（SPME-GC）测定了负载柠檬醛的 Pickering 乳液的形态和化学稳定性。结果表明，随着 CS-TPP Ps 浓度的增加，Pickering 乳液的粒径从 14.4μm 减小到 11μm。当 CS-TPP Ps 的浓度为 0.6%（w/v）时，Pickering 乳液的粒径在储存过程中保持不变。GC 表明，当 CS-TPP Ps 的浓度为 0.6%（w/v）时，Pickering 乳液具有最好的化学稳定性，在监测 14 天后仍有 52.33%的柠檬醛保留。综上所述，CS-TPP Ps Pickering 乳液包封柠檬醛可增强其在酸性环境下的化学稳定性。
