Pickering Janus乳液微观结构的影响因素及其应用

doi:10.3969/j.issn.2097-2806.2025.02.006

摘要/Abstract

摘要：

用固体颗粒作为乳化剂稳定的Janus乳液可称为Pickering Janus乳液，Pickering Janus乳液兼具Pickering乳液与Janus乳液的双重优势，不仅具有Pickering乳液的各项特征，而且还具有更多的增溶选择性和更强的分隔作用，在功效物质的运输和储备中有明显的优势。文章以纤维素纳米晶（CNCs）为主乳化剂，以硅油（O1）和与其不互溶的油脂（O2）为油相，采用一步均质法制备了Pickering Janus乳液。考察油脂（O2）性质、两油脂相对含量、助乳化剂含量以及制备工艺对乳液液滴拓扑结构或尺寸的影响，并以维生素E为代表，考察乳化体系对油溶性功效成分的释放行为。研究结果表明，Pickering Janus乳液具有高度可调控的拓扑结构和尺寸。通过改变油脂（O2）的种类，乳液液滴可从部分被吞噬的哑铃型结构变为完全被吞噬的核壳结构。通过调整两油脂相对含量，可以精确地控制液滴内两相的体积比。通过调整助乳化剂含量，可以调节一相对另一相的表面覆盖率。此外，通过改变乳化能量（如均质速率），可以控制乳液液滴的尺寸，均质速率越高，液滴的粒径越小。通过改变油脂相对含量或助乳化剂含量，还可以实现对体系内包载的功效成分释放行为的调节。且与传统Janus乳液相比，Pickering Janus乳液的缓释效果更优异。以固体颗粒为乳化剂制备的Pickering Janus乳液安全性高，对人体、环境更加友好，在化妆品领域具有广阔的应用前景，该研究不但可为新型乳化体系的开发提供基础信息，也可为其在化妆品领域的实际应用提供依据。

关键词: Pickering Janus乳液, 拓扑结构, 固体颗粒, 缓释

Abstract:

Janus emulsions stabilized by solid particles as emulsifier can be called Pickering Janus emulsions. Pickering Janus emulsions have double advantages of Pickering emulsions and Janus emulsions. Compared with the traditional emulsions, Janus emulsions have the advantages of stronger separation and better solubilization abilities, and have broad application prospects in the transportation and storage of active substances. Compared with Janus emulsions stabilized by surfactant, Janus emulsions stabilized by solid particles are less toxic, more stable and environmentally friendly. In this paper, Pickering Janus emulsions, in which cellulose nanocrystals （CNCs） was used as emulsifier and silicone oil （O1） and its immiscible oil （O2） were used as oil phases, were prepared by one-step homogenization method. The effects of oil property （O2）, the relative content of O1 to O2, the content of coemulsifier and preparation technology on the topological structure and droplet size of the emulsions were investigated. The results show that Pickering Janus emulsions have highly controllable topology and size. By changing the type of oil （O2）, the emulsion droplets can be changed from a partially engulfed dumbbell Janus structure to a fully engulfed core-shell structure. By adjusting the relative content of O1 to O2, the volume ratio of two phases in the droplet can be precisely controlled. The surface coverage of one phase relative to another can be adjusted by changing the content of coemulsifier. In addition, the size of the emulsion droplets can be controlled by changing the emulsification energy （such as the homogenization rate）. The higher homogenization rate is, the smaller sizes of the droplets are. The release behavior of the active substances in the system can also be adjusted by changing the relative content of two oils or the content of coemulsifier. In addition, Pickering Janus emulsion has a better slow-release effect than traditional Janus emulsion. This study provides guidance for the practical application of the new emulsion system in the field of cosmetics.

Key words: Pickering Janus emulsion, topological structure, solid particle, slow release

中图分类号:

TQ658

韩旭,吴槚佳,周康夫,尚亚卓. Pickering Janus乳液微观结构的影响因素及其应用[J]. 日用化学工业（中英文）, 2025, 55(2): 176-184.

Xu Han,Jiajia Wu,Kangfu Zhou,Yazhuo Shang. Influence factors on microstructure of Pickering Janus emulsions and its application[J]. China Surfactant Detergent & Cosmetics, 2025, 55(2): 176-184.

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原料分组	组分	质量分数/%
水相	水纤维素纳米晶卡波U21	至100.00 0.10 0.18
油相	100粘硅油（O1）油脂（O2）	5.00~15.00 10.00~15.00
油相	卵磷脂类液晶乳化剂维生素E	0~0.35 0~3.00
其他	质量分数为10%的氢氧化钠水溶液	0.36

液-液	界面张力/ （mN/m）	液-液	界面张力/ （mN/m）	液-液	界面张力/ （mN/m）	液-液	界面张力/ （mN/m）
CNCs水分散液-硅油	20.6	CNCs水分散液-硅油	20.6	CNCs水分散液-硅油	20.6	CNCs水分散液-硅油	20.6
CNCs水分散液-橄榄油	15.1	CNCs水分散液-荷荷巴油	17.6	CNCs水分散液-辛酸/癸酸甘油三酯	19.4	CNCs水分散液-角鲨烷	41.4
硅油-橄榄油	5.2	硅油-荷荷巴油	2.5	硅油-辛酸/癸酸甘油三酯	1.1	硅油-角鲨烷	2.4