Fast fabrication of micron-sized Janus particles with controlled morphology via seed-swelling photoinitiated polymerization and their application in Cu (II) ion removal

Effect of Solvent Polarity on Fabrication of Dual Janus Particles with Asymmetric Morphology and Chemical Identity via Photo-initiated Seeded Swelling Polymerization

“…Based on the above results, several types of Janus particles were prepared by photo-initiated seeded polymerization, including golf-shaped, dumbbell-shaped, snowman-shaped, bowl-shaped, ball-in-bowl, mushroom-shaped, and pinecone-shaped, by varying parameters such as the polarity of porogenic reagent and the volume ratio of total monomers to porogenic reagent. It is well known that the principle of Janus particle formation via thermally initiated seeded swelling polymerization is mainly based on the swelling of monomer into the seed and the phase separation induced by elastic stress, which eventually leads to macroscopic deformation of the resulting particles. ,, Based on this principle and our recent works, , the mechanism for the formation of Janus particles in photo-initiated seeded swelling polymerization was proposed in our case, as shown in Figure .…”

“…It is well known that the principle of Janus particle formation via thermally initiated seeded swelling polymerization is mainly based on the swelling of monomer into the seed and the phase separation induced by elastic stress, which eventually leads to macroscopic deformation of the resulting particles. 31,34,44 Based on this principle and our recent works, 37,38 the mechanism for the formation of Janus particles in photoinitiated seeded swelling polymerization was proposed in our case, as shown in Figure 6.…”

“…34,35 Huang and Liu 36 prepared raspberry-like Janus particles with various anisotropic properties by γ-ray-induced seeded swelling polymerization. More recently, semi-raspberry-like Janus particles were prepared by our group via UV light-induced seeded swelling polymerization, 37,38 and it was also found that the solvent (porogenic reagent) polarity affects the morphology of the particles. Obviously, the photo-initiation reaction is a rapid reaction with a high conversion rate, and the whole process only takes less than 30 min.…”

“…Most of the particles prepared by this strategy possessed snowman-shaped, dumbbell-shaped, and raspberry-shaped morphologies, and a few particles with convex surfaces; however, it is still challenging to prepare particles with concave surfaces by this strategy. , In general, seeded emulsion polymerization still has the shortcoming of a longer reaction time, even taking a week to prepare a batch of Janus particles. , Huang and Liu prepared raspberry-like Janus particles with various anisotropic properties by γ-ray-induced seeded swelling polymerization. More recently, semi-raspberry-like Janus particles were prepared by our group via UV light-induced seeded swelling polymerization, , and it was also found that the solvent (porogenic reagent) polarity affects the morphology of the particles. Obviously, the photo-initiation reaction is a rapid reaction with a high conversion rate, and the whole process only takes less than 30 min .…”

Janus Hemispheres through Controlled Polymerization-Induced Phase Separations within Wax Droplets

“…Janus particles, especially polymeric Janus particles, are commonly fabricated from controlled phase separation, − self-assembly strategy, ,− seed-mediated emulsion polymerization, − and microfluidic preparation strategy. ,,,− The controlled phase separation within restricted space is extremely promising without doubt due to its versatility. Phase separation is usually induced by polymerization − or/and solvent evaporation. − Most recently, some other strategies, including nonsolvent-induced phase separation, diffusion-induced phase separation, gravity-induced phase separation, and thermal phase separation, − were reported.…”