(413g) Microenvironment Effect on Reaction Kinetics within Self-Assembled Polymer Nanoreactors
AIChE Annual Meeting
2018 AIChE Annual Meeting
Catalysis and Reaction Engineering Division
Microreaction Engineering II
Tuesday, October 30, 2018 - 5:36pm to 5:57pm
Using the FNP platform and polystyrene as a model co-precipitant, the process parameters to tune the nanoreactor size and catalyst loading independently were determined. Nanoreactors with tunable microenvironments have also been achieved. In addition to polystyrene (solid), nanoreactors with liquid microenvironments (Dodecane, Vitamin E) have been fabricated. We have systematically varied microenvironment-catalyst interactions from no interactions (Dodecane, Vitamin E-gold), intermediate interaction (gold-amine), and strong interactions (gold-thiol).
The reaction kinetics of the encapsulated catalyst were evaluated using reduction of 4-nitrophenol as a model reaction. To determine the effect of the microenvironment on apparent reaction kinetics, the induction time and apparent rate constants will be compared. Microenvironment-catalyst interactions significantly impacted the reaction kinetics; presence of dodecanethiol or dodecylamine in the nanoreactor core inhibited the reaction. This result confirms that the reaction occurs at the surface of the gold nanoparticle. Overall, nanoreactors with inert microenvironments enhanced the apparent reaction when compared to the unencapsulated gold nanoparticle catalysts.