Page 19 - 201812

第 35 卷第 12 期 精 细 化 工 Vol.35, No.12
2018 年 12 月 FINE CHEMICALS Dec. 2018

功能材料
SCL@SiO 纳米颗粒的制备及其
2

稳定的 Pickering 乳液

*
樊 晔，牛 田，方 云 ，夏咏梅，刘深鑫
（江南大学 化学与材料工程学院，合成与生物胶体教育部重点实验室，江苏 无锡 214122）

摘要：用共轭亚油酸钠(SCL)在 SiO 2 纳米颗粒表面吸附，得到表面改性的 SiO 2 纳米颗粒，然后在 80 ℃下通过热
聚合引发 SCL 分子自交联，从而稳定 SCL@SiO 2 纳米颗粒的 SCL 层并改善其表面润湿性。通过 Zeta 电位、FTIR、
DLS、TG 和 DTG 对材料进行了表征。结果显示：SCL 物理吸附在 SiO 2 纳米颗粒表面。以 SCL@SiO 2 纳米颗粒
作为单一乳化剂制备液体石蜡的 Pickering 乳液，结果表明：该 Pickering 乳液在制备一个月后外观基本不发生变

化，而传统乳液出现明显破乳现象。热重分析结果显示：SCL@SiO 2 纳米颗粒的 SCL 层比简单吸附脂肪酸的 SiO 2
改性颗粒更稳定，且粒径会随着 pH 的减小而增大（11~16 nm），因此，由 SCL@SiO 2 纳米颗粒稳定的 Pickering
乳液粒径（15~29 μm）也具有一定的 pH 响应性。
关键词：SCL@SiO 2 ；Pickering 乳液；共轭亚油酸钠；热聚合；pH 响应；功能材料
中图分类号：TQ423.9；O648.1 文献标识码：A 文章编号：1003-5214 (2018) 12-1987-06

Preparation of SCL@SiO 2 Nanoparticles and Their

Application for Pickering Emulsion

*
FAN Ye, NIU Tian, FANG Yun , XIA Yong-mei, LIU Shen-xin
（Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material
Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China）

Abstract: Surface modified SiO 2 nanoparticles, SCL@SiO 2 were prepared by adsorbing sodium conjugated
linoleate (SCL) on the surface of SiO 2 nanoparticles, in which SCL molecules were stabilized through
self-crosslinking by thermal polymerization at 80 ℃, consequently, the surface wettability of SiO 2
nanoparticles was improved. Zeta potential, FTIR, DLS, TG and DTG were used to characterize the
obtained materials. The results showed that SCL was adsorbed and solidified on the surface of SiO 2
nanoparticles by this way. Subsequently, Pickering emulsion was prepared by using liquid paraffin as oil
phase and SCL@SiO 2 nanoparticles as sole emulsifier. It was found that the appearance of the prepared
Pickering emulsion was not change after being placed for a month, while the traditional emulsion showed
obvious demulsification. The TG result showed that SCL layer on the surface of SCL@SiO 2 nanoparticles
prepared by thermal polymerization was more stable than that on the SiO 2 nanoparticles prepared by simple
adsorption of SCL. Moreover, the particle sizes of SCL@SiO 2 nanoparticles (11~16 nm) increased with the
decrease of pH value. Therefore, the droplet sizes of Pickering emulsion stabilized by SCL@SiO 2
nanoparticles (15~29 μm) also had a certain pH-responsivity.
Key words: SCL@SiO 2; Pickering emulsion; sodium conjugated linoleate; thermal polymerization;
pH-responsivity; functional materials
Foundation items: National Key R&D Program of China (2017YFB0308705); National Natural Science
Foundation of China (21606107 and 21276113); Undergraduate Innovation and Entrepreneurship Training
Program of Jiangsu Province (201710295006Y)

收稿日期：2018-01-29; 定用日期：2018-05-30; DOI: 10.13550/j.jxhg.20180086
基金项目：国家重点研发计划项目（2017YFB0308705）；国家自然科学基金（21606107, 21276113）；江苏省高等学校大学生创新创业
训练计划项目（201710295006Y）
作者简介：樊 晔（1985—），女，讲师，博士。联系人：方云（1957—），男，博士，教授，博士生导师，E-mail：yunfang@126.com。