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由沉淀法和溶胶-凝胶法分别制备了Ni Fe_2O_4和Ti O_2,并用XRD和SEM对两种粒子进行了表征,结果表明成功制备了粒径大小较为均匀的目标产物。用CTAB对Ni Fe_2O_4进行了改性,并由IR和Zeta电位测试予以确认。以改性Ni Fe_2O_4和Ti O_2作为稳定粒子,由两步法制备了W/O/W型多重Pickering乳液,采用数码照片和光学显微照片观察所制备的乳液的宏观与微观形貌。研究表明,制备的单重Pickering乳液粒径较为均匀,多重Pickering乳液粒径范围稍宽,但两者稳定性能都非常良好。
Ni Fe 2 O 4 and Ti O 2 were prepared by precipitation method and sol-gel method, respectively. The two kinds of particles were characterized by XRD and SEM. The results showed that the target particles with a uniform particle size were successfully prepared. Ni Fe 2 O 4 was modified by CTAB and confirmed by IR and Zeta potential tests. The W / O / W multiple Pickering emulsions were prepared by two-step method with modified Ni Fe 2 O 4 and Ti O 2 as stable particles. The macroscopic and microscopic morphology of the emulsions were observed by digital photos and optical micrographs. The research shows that the particle size of single Pickering emulsion prepared is more uniform and the particle size of multiple Pickering emulsions is slightly wider, but the stability of both is very good.