pps proceeding - Abstract Preview
pps proceeding
Symposium: S10 - Nano- and Microstructured Surfaces and Films
Poster Presentation
 
 

Bio-inspired hierarchical nanocomposite foam for rapid oil/water separation

Cherukupally Pavani (1)*, Sun Wei (1), Wong Annabelle P.Y. (1), Ozin Geoffery A. (1), Bilton Amy M. (1), Park Chul B. (1)

(1) University of Toronto - Ontario - Canada

Note: We would like to deliver this work as both poster and oral presentations. If there is a poster competition please allow us to present a poster. Removal of micro-oil droplets from industrial effluents, such as oil spills, oil field wastewater, and petrochemical effluents, is a global environmental challenge. For example, Canada’s oil sands industry has generated over 1 billion m3 of dissolved organic contaminated water resulting in severe damage to the environment, human health, and wildlife habitat. Unfortunately, the existing superwetting foams for oil/water mixture separation are ineffective for micro-oil droplet removal and are made from expensive, toxic, or non-scalable materials, such as metal oxides, carbon nanotubes, and graphene. One promising solution is to use polymeric foams for micro-oil and water separation due to their low cost, effectiveness, and multifunctional properties. In this work, a scalable, facile dip-coating method was employed to functionalize polyester polyurethane foam with decyl-capped nanocrystalline silicon (ncSi), resulting in complementary electronic and oleophilic properties. Within only 10 minutes, the novel hybrid foam is able to adsorb crude oil micro-droplets via electrostatic and van der Waals forces with over 97% efficacy. Moreover, due to its large free volume and surface area, an oil uptake capacity of 24 g/g was achieved in only 60 seconds. The nanocomposite foam also exhibited other favourable properties, such as its resistance towards acids and bases, low density and hydrophobicity. These preliminary studies indicate the low-cost ncSi coated polymeric foam has a great potential to remediate organic contamination in industrial effluents.