State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
Carbohydr Polym. 2021 Aug 1;265:118101. doi: 10.1016/j.carbpol.2021.118101. Epub 2021 Apr 24.
Nano cellulose has attracted more attentions as promising stabilizer candidate for Pickering emulsions due to its renewable and biocompatible properties. In this work, spherical cellulose nanocrystals (S-CNCs) (diameter 30-60 nm) were prepared by mixed acid hydrolysis of mercerized microcrystalline cellulose under the treatment of ultrasonic. We characterized the Pickering emulsions stabilized by various S-CNCs concentration in the aqueous phase and visualized their distribution in emulsions system. The diameter of emulsion droplets has no increase after 7 days storage. The emulsions present ultra-low viscosity even at a high S-CNCs concentration in the aqueous phase (5 g/L). Furthermore, noting that Pickering emulsions droplets stabilized by S-CNCs exhibited high stability even pH, ionic strengths, and temperatures changed in wide range. Thus, the S-CNCs acted as a new stabilizer for Pickering emulsion open opportunities for the development of biomedicine, cosmetics, and food applications.
纳米纤维素由于其可再生和生物相容性的特点，作为有前途的 Pickering 乳液稳定剂而引起了更多的关注。在这项工作中，通过对经丝光处理的微晶纤维素进行混合酸水解，并在超声处理下，制备了直径为 30-60nm 的球形纤维素纳米晶体（S-CNCs）。我们对不同浓度的 S-CNCs 在水相中的 Pickering 乳液进行了表征，并可视化了它们在乳液体系中的分布。在 7 天的储存后，乳液液滴的直径没有增加。即使在水相中的 S-CNCs 浓度较高（5g/L）时，乳液也表现出超低的粘度。此外，我们注意到，即使 pH 值、离子强度和温度在很宽的范围内发生变化，S-CNCs 稳定的 Pickering 乳液液滴仍表现出很高的稳定性。因此，S-CNCs 作为 Pickering 乳液的一种新型稳定剂，为生物医学、化妆品和食品应用的发展开辟了新的机遇。
