- Synthesizing large-sized polystyrene colloidal particles
Highly monodisperse polystyrene (PS) microspheres in the size range of 1 to 10 μm were synthesized. The particle size distribution (PSD) of the these microspheres obtained was investigated. The PS microspheres with coefficient of variation (CV) values all less than 10% analyzed by scanning electron microscopy.
- Synthesizing sub-micron colloidal particles by emulsion polimerization
Uniform polymer particles are synthesized by emulsion polimerization. This technique is able to adjust particle diameters (50 - 300 nm), glass transition temperatures (-50 to 100 degree Celsius), and volume fractions (< 50%). Part of EPI's latex library is listed here.
Stress relaxation of drying colloids attracts our interest because the final mechanical properties of materials depend on colloidal structure. We use oil droplets as probes to visualize how local stress develops in the colloids near close packing. Read more.
Probing stress and strain distribution in drying latex films