Dept. Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, Göttingen, D-37077, Germany.
Third Institute of Physics - Biophysics, University of Göttingen, Friedrich-Hund-Platz 1, D-37077Göttingen, Germany; Experimental Physics I, University of Bayreuth, Universitätsstrasse 30, Bayreuth, D-95440, Germany.
Carbohydr Polym. 2021 Apr 15;258:117655. doi: 10.1016/j.carbpol.2021.117655. Epub 2021 Jan 18.
High internal phase Pickering emulsions (HIPPEs) have attracted intensive interest for their great potential in foods, cosmetics, and biomedical applications. However, the relatively poor biodegradability and biocompatibility of inorganic and synthetic particulate emulsifiers greatly limit their practical applications. Here, a kind of biobased nanoparticles, namely dialdehyde amylopectin/chitosan complex nanoparticles (DAPCNPs), were fabricated by Schiff base reaction between dialdehyde amylopectin and chitosan with the assistance of ultrasonication treatment. The resultant DAPCNPs were employed to stabilize O/W HIPPEs with various oils, such as toluene, cyclohexane, styrene and edible rapeseed oil. Moreover, the resultant DAPCNPs-stabilized HIPPEs showed high stability under various environmental stresses (80 °C; 20 mM and 100 mM aqueous NaCl solutions). Furthermore, porous scaffolds were also fabricated by freeze-drying cyclohexane-in-water HIPPEs stabilized by DAPCNPs after the introduction of polyvinyl alcohol (PVA) into the continuous phase. These findings would give inspiration for designing polysaccharides-based nanoparticles to stabilize HIPPEs and improve their practical applications.
高内相比 Pickering 乳液（HIPPEs）因其在食品、化妆品和生物医学应用方面的巨大潜力而引起了广泛关注。然而，无机和合成颗粒乳化剂相对较差的生物降解性和生物相容性极大地限制了它们的实际应用。在这里，通过使用超声处理，通过席夫碱反应将醛基化支链淀粉和壳聚糖制备了一种生物基纳米粒子，即双醛支链淀粉/壳聚糖复合纳米粒子（DAPCNPs）。所得的 DAPCNPs 被用作甲苯、环己烷、苯乙烯和食用菜籽油等各种油的 O/W HIPPEs 的稳定剂。此外，所得的 DAPCNPs 稳定的 HIPPEs 在各种环境压力（80°C；20 mM 和 100 mM 水 NaCl 溶液）下表现出高稳定性。此外，通过将聚乙烯醇（PVA）引入连续相，还通过冷冻干燥 DAPCNPs 稳定的环己烷-水 HIPPEs 制备了多孔支架。这些发现为设计基于多糖的纳米粒子来稳定 HIPPEs 并提高其实际应用提供了启示。
