Rapid and continuous fabrication of TiO2 nanoparticles encapsulated by polyimide fine particles using a multistep flow-system and their application

Takayuki Ishizaka; Maya Chatterjee; Hajime Kawanami

doi:10.1039/d0ra09810h

Rapid and continuous fabrication of TiO₂ nanoparticles encapsulated by polyimide fine particles using a multistep flow-system and their application

RSC Adv. 2021 Jan 7;11(4):2083-2087. doi: 10.1039/d0ra09810h. eCollection 2021 Jan 6.

Authors

Takayuki Ishizaka¹, Maya Chatterjee¹, Hajime Kawanami²

Affiliations

¹ Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST) 4-2-1 Nigatake, Miyagino-ku Sendai Miyagi 983-8551 Japan t-ishizaka@aist.go.jp.
² Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST) Central 5, 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan h-kawanami@aist.go.jp.

Abstract

PI fine particles encapsulating a large number of TiO₂ nanoparticles (PI FPs/TiO₂ NPs) were successfully fabricated rapidly and continuously by the emulsion re-precipitation method using a multistep flow synthetic system. The fabricated material, PI FPs/TiO₂ NPs, was spherical in structure with a diameter of 214 nm, and the mean size of TiO₂ NPs was 5.2 nm. Line scan elemental analysis with SEM-EDX showed that the TiO₂ NPs were disproportionately embedded near the surface of the PI FPs. UV-vis transmission spectra revealed high UV shielding efficiency of the PI FPs/TiO₂ NPs as the NPs are located near the surface.