| 초록 |
Continuing the objective to find out the condition which produced particles having about 5μm to use a material for toner, we investigated the influence of solution injection rate and CO2 feed rate on polystyrene particle. In various injection rate of solution, particles were relatively less aggregated with comparing to our previous results. This is attributed to increased feed rate of CO2 from 3.0ℓ/min to 6.0 ℓ/min. With increasing the solution injection rate, particles were more aggregated but initial particle size was smaller. If the feed rate of CO2 was very abundant into a precipitator, we could have better particles. From these results, we found out atomization of PS/DCM (dichloromethane) solution is more excellent. In increasing the feed rate of CO2, particles were less agglomerated and became smaller. We used DCM, toluene, acetone/DCM and acetone/ toluene as a solvent for PS. As a result, DCM is the most suitable solvent for re-crystallization of PS into submicron particles. |
