壳聚糖膜可控的液滴尺寸的 Pickering 乳液稳定的两亲性魔芋葡甘聚糖网络。
Chitosan films with tunable droplet size of Pickering emulsions stabilized by amphiphilic konjac glucomannan network.
机构信息
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
出版信息
Int J Biol Macromol. 2022 Nov 1;220:1072-1083. doi: 10.1016/j.ijbiomac.2022.08.157. Epub 2022 Aug 28.
In this work, chitosan (CS) emulsion films were prepared with grapefruit essential oil (GEO) Pickering emulsions (OGEOs) stabilized by amphiphilic octenyl succinic anhydride (OSA) konjac glucomannan (OSA-KGM) network. The droplet size of emulsion was regulated by altering oil content in OGEOs (10 %, 20 %, 30 % and 40 %, w/w). The structural and physicochemical properties of CS films with tunable emulsion droplets (OGEOs) were investigated. The droplet size of OGEOs increased with the increasing content of GEO. FT-IR revealed that the formation of CS-OGEOs films was attributed to hydrogen bonding. CS-OGEOs films with large droplets presented smoother surface, enhanced water resistance, UV-shielding property, mechanical properties, but increased water vapor permeability (WVP) compared with CS-OGEOs films with small droplets. In addition, CS-OGEOs films with large droplets also presented compact film structure, controlled release of GEO, high efficiency of DPPH free radical scavenging and antibacterial activity. To sum up, incorporation of emulsion droplets was a good strategy for improving the structural and physicochemical properties of CS films.
在这项工作中，壳聚糖（CS）乳液薄膜是用由亲油型辛烯基琥珀酸酐（OSA）魔芋葡甘露聚糖（OSA-KGM）网络稳定的柚皮精油（GEO）Pickering 乳液（OGEOs）制备的。通过改变 OGEOs 中的油含量（10%、20%、30%和 40%，w/w）来调节乳液的液滴尺寸。研究了具有可调乳液液滴（OGEOs）的 CS 薄膜的结构和物理化学性质。OGEOs 的液滴尺寸随着 GEO 含量的增加而增大。FT-IR 表明 CS-OGEOs 薄膜的形成归因于氢键。与具有小液滴的 CS-OGEOs 薄膜相比，具有大液滴的 CS-OGEOs 薄膜表面更光滑，耐水性、遮光性、机械性能增强，但水蒸气透过率（WVP）增加。此外，具有大液滴的 CS-OGEOs 薄膜还具有更致密的薄膜结构、GEO 的控制释放、高 DPPH 自由基清除效率和抗菌活性。总之，乳液液滴的掺入是改善 CS 薄膜结构和物理化学性质的一种很好的策略。
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