Janus composites particles: Prepared via cross‐linking driven one‐step miniemulsion polymerization and as film‐forming material

Abstract

A kind of Janus polyacrylate (PA)/SiO2 composite latex particles named Janus C‐PA/SiO2 CLPs were prepared via cross‐linking driven in the course of miniemulsion process. The Janus particles with snowman shape were obtained under optimized cross‐linking agent content and silicon source content, and they were used to prepare the film. The properties and microstructure of this film were in comparison with the cross‐linked PA latex particles (C‐PA LPs) without SiO2 nanoparticles and irregular PA/SiO2 composites particles (PA/SiO2 CLPs) without a cross‐linker. The SEM‐EDS results demonstrated that the Si element distribution in the Janus C‐PA/SiO2 film was more uniform than conventional PA/SiO2 film. The AFM results indicated that the twist‐like film were distributed throughout the region, and the Janus C‐PA/SiO2 film had a roughness of 13.4nm. Additionally, the tensile strength and water resistance of the Janus C‐PA/SiO2 film were at least 142.65% and 91% higher than that of the other two films, and it also had the maximum thermal decomposition temperature of 403.14°C. Based on the research results, the relationship between the latex particle structure and film properties was obtained.

Preparation of Asymmetric Al2O3-SiO2 Janus Nanoparticles in Aqueous Phase and Its Interfacial Property

“…Since then, research on Janus nanoparticles has been thriving, and they have received considerable attention due to their unique physical, chemical, and biological properties [ 8 ]. Different techniques such as masking, bottom-up assemblies, and controlled phase separation have been employed to synthesize Janus nanoparticles [ 9 , 10 ], and various Janus architectures have been created, such as cylindrical-shaped [ 11 ], dumbbell-shaped with asymmetric or snowman characters [ 12 , 13 , 14 , 15 , 16 , 17 ], mushroom-shaped [ 18 , 19 ], bowl-like [ 20 , 21 ], crescent-shaped [ 22 , 23 ], and half-raspberry-shaped structures [ 24 ]. Among these, dumbbell-like nanoparticles, as a prominent subset of Janus nanoparticles, have attracted significant interest due to their unique structure and excellent performance in various application domains, including drug delivery, catalysis, sensing, and advanced materials.…”