Jin Haoran, Li Chen, Sun Yajuan, Zhao Bingtian, Li Yunxing
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
School of Chemistry, Biology and Environment, Yuxi Normal University, Yuxi 653100, China.
Gels. 2024 May 15;10(5):335. doi: 10.3390/gels10050335.
Herein, the starch nanocrystal/tannic acid (ST) complex particles, which were prepared based on the hydrogen bond between starch nanocrystal (SNC) and tannic acid (TA), were successfully used to stabilize the HIPPE gels. The optimal TA concentration of the ST complex particles resulted in better water dispersibility, surface wettability, and interfacial activity as compared to SNC. The hydrogen bond responsible for the formation of ST complex particles and subsequent stable emulsions was demonstrated by varying the pH and ionic strength of the aqueous phase. Notably, the HIPPE gels stabilized via the ST complex particles can maintain long-term stability for up to three months. The HIPPEs stabilized via the ST complex particles all displayed gel-like features and had smaller droplets and denser droplet networks than the SNC-stabilized HIPPEs. The rheological behavior of HIPPE gels stabilized via the ST complex particles can be readily changed by tuning the mass ratio of SNC and TA as well as pH. Finally, the prepared HIPPE gels used to effectively protect encapsulated -carotene against high temperatures and ultraviolet radiation and its controllable release at room temperature were demonstrated. It is anticipated that the aforementioned findings will provide new perspectives on the preparation of Pickering emulsion for delivery systems.
在此，基于淀粉纳米晶体（SNC）与单宁酸（TA）之间的氢键制备的淀粉纳米晶体/单宁酸（ST）复合颗粒成功用于稳定高内相Pickering乳液（HIPPE）凝胶。与SNC相比，ST复合颗粒的最佳TA浓度导致更好的水分散性、表面润湿性和界面活性。通过改变水相的pH值和离子强度，证明了负责形成ST复合颗粒和随后稳定乳液的氢键。值得注意的是，通过ST复合颗粒稳定的HIPPE凝胶可以保持长达三个月的长期稳定性。通过ST复合颗粒稳定的HIPPE均表现出凝胶状特征，并且与SNC稳定的HIPPE相比，具有更小的液滴和更密集的液滴网络。通过调节SNC和TA的质量比以及pH值，可以很容易地改变通过ST复合颗粒稳定的HIPPE凝胶的流变行为。最后，证明了所制备的HIPPE凝胶可有效保护包封的β-胡萝卜素免受高温和紫外线辐射，并在室温下实现可控释放。预计上述发现将为用于递送系统的Pickering乳液的制备提供新的视角。
