文档介绍：
纳米颗粒与 PEO 对 Pickering 乳液的协同稳
定机理#
谭伟强1,臧渡洋1,李云飞1,张永建2,陆晨君1,栗志广1**
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(1. 西北工业大学理学院,空间应用物理与化学教育部重点实验室,西安 710129;
2. 西北工业大学材料学院,凝固技术国家重点实验室,西安 710072)
摘要:本文研究了 PEO 高分子与 SiO2 纳米颗粒对水/二甲苯体系 Pickering 乳液的协同稳定
机理. 实验发现, PEO 的存在减小了乳液液滴的平均直径, 抑制了乳液的相反转, 有效阻止
了乳液的熟化, 使得乳液具有更好的稳定性. 进一步对纳米颗粒膜的流变性质进行研究, 结
果表明, PEO 高分子促进了纳米颗粒形成更大尺寸的聚集结构, 从而提高了其在界面上的吸
附性, 这就赋予颗粒膜更强的力学性能, 从而 Gibbs 稳定性判据得到满足. 我们的研究揭示,
液/液界面的流变性质对 Pickering 乳液的稳定性起着重要作用。
关键词:胶体与界面化学;纳米颗粒;熟化;反相
中图分类号:O648
Ultrastability of Pickering Emulsion Stabilized by Both
Silica Nanoparticles and PEO
TAN Weiqiang1, ZANG Duyang1, LI Yunfei1, ZHANG Yongjian2, LU Chenjun1,
LI Zhiguang1
(1. Key Laboratory of Space Applied Physics and Chemistry of Ministry of Education, School of
Science, Northwestern Polytechnical University, Xi’an 710129;
2. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering,
Northwestern Polytechnical University, Xi’an 710072)
Abstract: We have prepared gel-like Pickering emulsions with 65 vol.% water and 35% vol.%
xylene system stabilized by H30 silica nanoparticles or by both the particles and PEO additives.
The emulsification was performed using a rotor-stator homogenizer under varied rotation speed
from 5000 rpm to 24000 rpm. The emulsion droplets were observed using an optical microscope,
consequently, the droplet diam