非共价改性纳米颗粒稳定Pickering乳液的制备及可逆调控  

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

作　　者：罗东琴 孙宁 李秋红[1] 隋鹏亮 姜秋艳 隋晓飞 李爱香[1] LUO Dongqin;SUN Ning;LI Qiuhong;SUI Pengliang;JIANG Qiuyan;SUI Xiaofei;LI Aixiang(School of Materials Science and Engineering,Zibo 255049,Shandong,China;Shandong Linglong Tire Co.,Ltd.,Zhaoyuan 265406,Shandong,China)

机构地区：[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

出　　处：《化工学报》2020年第4期1859-1870,共12页CIESC Journal

基　　金：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)。

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。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.

关 键 词：Pickering乳液 非共价 稳定性 氧化还原 磁场 

分 类 号：TB34[一般工业技术—材料科学与工程]