Preparations And Properties Of Two Kinds Of Janus Particles

Janus particles have anisotropic structures and properties in their different sides haveattracted considerable attention. The particles have tremendous potential in the fields ofmaterials and engineering such as interface modification, surfactant, self-assembling,forming Pickering emulsions and e-paper.First, the Poly Styrene (PS) dimple spheres can be swollen by vinyl benzyl chloride(VBC) to form spherical particles. The IR and SEM were used to analysis the infrared andsurface morphology properties of the particles, respectively. These proved that the particleswe synthesized are Janus particles. The particles dispersed in Dimethyl Formamide (DMF)were vibrated by ultrasonic and centrifuged, a kind of moon-like PVBC particles weresynthesized.The analysing results of the IR and EDS show that the sulfur group of1-Thio-β-D-glucose sodium salt reacted with the Janus particles. The FITC-Con Adissolved in buffer solution was adsorbed specifically onto the particles. Fluorescencemicroscopy image illustrated that one side of the particles had fluorescent and the otherside didn’t. This result shows that the particles have specific adsorption properties toprotein.Second, a simple T-junction micro-fluidic channel was used in this paper to preparePoly(ethylene glycol) diacrylate (PEG-DA) Janus particles (microspheres) whichcontaining magnetic particles. We found that the size of the magnetic particles and the timeof the droplets stayed in the magnetic field before solidification can influence the size andshape of the microspheres. When the size of the magnetic particles was0.699μm and thetime was more than2minutes before solidification, the ideal Janus microspheres weresynthesized. It was observed that the magnetic particles arranged linearly in microspheres.