Preparation, Characterization, and Properties of Hollow Janus Particles with Tailored Shapes

Abstract

As compared to the traditional solid Janus particles, the hollow Janus particles have inspired growing interests due to their diverse potential applications. Herein, the novel hollow Janus particles with elephant trunk-like and acorn-like shapes were prepared by seed emulsion polymerization. In contrast to traditional template methods, the hollow structure was obtained during the preparation by one-step swelling method. The shapes and internal structures of hollow Janus particles were confirmed, and the compositions were identified too. Some critical influences on the morphology control were investigated, that is, the surface modification, the amount of surfactant, and cross-linking agent concentrations. It was inferred that the balance of hydrophilicity and hydrophobicity and the effective phase separation were important for preparing the hollow Janus particles with tailored shapes. Finally, amphiphilic properties of hollow Janus particles were demonstrated by emulsifying oil-water mixture.

Morphology and film performance of phthalate-free plasticized poly(vinyl chloride) composite particles via the graft copolymerization of acrylate swelling flower-like latex particles

“…In this study, MPS was pre-hydrolyzed for 1 h with sodium hydroxide aqueous solution (in this case, the pH value of the system was adjusted between 10 and 11), so the (CH 3 O) 3 -Sigroups of MPS molecules hydrolyzed into metastable Si-OH groups, and some of them self-condensed further into polyfunctional oligomers with two or more acrylate groups via the sol-gel process, 31,33,34 as seen in Scheme 1. These oligomers were more hydrophilic than the MPS monomers.…”

Janus Particles at Fluid Interfaces: Stability and Interfacial Rheology

“…With the recent advancements in synthesis and fabrication techniques, particle anisotropy (both in shape and surface properties) has been introduced as another avenue for manipulating the behavior of particles at fluid interfaces. Not only this is a significant step from the standpoint of fundamental science, but is also essential from the practical point of view where in many real applications the particles possess heterogeneities and non-idealities [34][35][36][37][38][39][40]. Therefore, due to these deviations, their behavior cannot be fully described by our understanding of homogeneous particles.…”

Polymeric Janus Nanoparticles: Recent Advances in Synthetic Strategies, Materials Properties, and Applications

“…Among them, Janus particles with two sides of different chemistry or polarity compartmentalized distinctly onto one object are of particular interest . The unique anisotropic features in composition and functions endow the materials promising applications in a range of fields, such as optical images, interfacial stabilizers, catalysis, biomedicine, and nanomotors …”