化工学报 ›› 2020, Vol. 71 ›› Issue (4): 1859-1870.DOI: 10.11949/0438-1157.20191061

• 材料化学工程与纳米技术 • 上一篇    下一篇

非共价改性纳米颗粒稳定Pickering乳液的制备及可逆调控

罗东琴1(),孙宁1,李秋红1(),隋鹏亮1,姜秋艳1,隋晓飞2,李爱香1   

  1. 1.山东理工大学材料科学与工程学院,山东 淄博 255049
    2.山东玲珑轮胎股份有限公司,山东 招远 265406
  • 收稿日期:2019-09-23 修回日期:2020-01-02 出版日期:2020-04-05 发布日期:2020-04-05
  • 通讯作者: 李秋红
  • 作者简介:罗东琴(1995—),女,硕士研究生,2650514214@qq.com
  • 基金资助:
    国家自然科学基金项目(21706148);山东理工大学招远工业技术研究院创新研究基金项目(9101-219185)

Preparation and modulation of Pickering emulsion stabilized by non-covalent hydrophobic modified nanoparticles

Dongqin LUO1(),Ning SUN1,Qiuhong LI1(),Pengliang SUI1,Qiuyan JIANG1,Xiaofei SUI2,Aixiang LI1   

  1. 1.School of Materials Science and Engineering, Zibo 255049, Shandong, China
    2.Shandong Linglong Tire Co. , Ltd. , Zhaoyuan 265406, Shandong, China
  • Received:2019-09-23 Revised:2020-01-02 Online:2020-04-05 Published:2020-04-05
  • Contact: Qiuhong LI

摘要:

用具有氧化还原活性分子乙酰基二茂铁吖嗪(Fc+A)对磁性纳米颗粒Fe3O4@SiO2进行非共价疏水改性,将改性颗粒作为乳化剂制备Pickering乳液。通过TEM、SEM、FTIR、XRD、接触角测量、光学显微镜等对纳米颗粒及Pickering乳液的结构、形貌和性能进行表征。结果表明:制备的核壳结构纳米颗粒粒径为150 nm左右,分散均匀;Fc+A成功修饰到纳米颗粒表面,且随Fc+A浓度的增加,改性颗粒的接触角明显增大;Fc+A浓度为12.5 mmol/L,乳化剂浓度为0.3%(质量),油水比为4∶6,搅拌速率为10000 r/min,得到的Pickering乳液具有良好的稳定性。而且,所得乳液具双重响应性,通过氧化还原和磁场可实现对乳液稳定性的可逆调控。

关键词: Pickering乳液, 非共价, 稳定性, 氧化还原, 磁场

Abstract:

Non-covalent hydrophobic modification of magnetic nanoparticles Fe3O4@SiO2 with a redox-active molecule acetylferrocene azine (Fc+A), and the modified particles were used as emulsifiers to prepare Pickering emulsions. The modified particles were used as emulsifiers to prepare Pickering emulsion. The structure and properties of nanoparticles and Pickering emulsion were characterized by TEM, SEM, FTIR, XRD, contact angle measurement and optical microscopy. The experimental results showed that the mono-dispersed nanoparticles with particle size 150 nm were synthesized and Fc+A was successfully introduced onto the surface of nanoparticles. With the increase of Fc+A concentration, the contact angel of nanoparticles increased. The Pickering emulsion obtained could be stabilized when the concentration of Fc+A was 12.5 mmol/L, the emulsifier concentration was 0.3%(mass), oil-water ratio was 4∶6 and rotation speed was 10000 r/min. Finally, the stability of emulsion was reversibly regulated by redox and magnetic field.

Key words: Pickering emulsion, non-covalent, stability, redox, magnetic field

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