ANTISOLVENT PRECIPITATION OF Sahr Sana STARCH Dr Kamelia Boodhoo - - PowerPoint PPT Presentation
SOLVENT- ANTISOLVENT PRECIPITATION OF Sahr Sana STARCH Dr Kamelia Boodhoo Dr Vladimir Zivkovic NANOPARTICLES IN A SPINNING DISC REACTOR Applications of starch nanoparticles Nanocomposite filler Enhance mechanical, barrier and
Sahr Sana Dr Kamelia Boodhoo Dr Vladimir Zivkovic
▪ Nanocomposite filler
▪ Enhance mechanical, barrier and thermal properties
▪ Wastewater treatment
▪ Remove organic pollutant
▪ Carrier for drug delivery systems
▪ Biodegradable, non-toxic
▪ Packaging
▪ Dropwise addition of antisolvent to solvent-solute mixture ▪ Size of nanoparticles 50 – 200 nm [1] ▪ Limitations:
▪ No study of flow systems reported in literature NaOH + Starch NaOH + Starch Starch nano- particles
[1] A. Hebeish, M.H. El-Rafie, M.A. EL-Sheikh, M.E. El-Naggar, Journal of Inorganic and Organometallic Polymers and Materials 24 (2014) 515-524.
100 nm 500 nm
1 % w/v starch, 800 RPM, 1 mL/s 2 % w/v starch, 800 RPM, 1 mL/s
▪ Applied to processes including:
▪ Characteristics of SDR
Product Collection Product Collection Disc (heated/cooled) Feed Pipes Reactor Housing
Disc Reactor housing
15 . 1 nm 14 . 4 nm 15 . 2 nm 12 . 2 nm 8 . 1 nm
Run 12 (QT= 18 mL/s, 1:9, 1200 RPM) Run 8 (QT= 6 mL/s, 1:9, 1200 RPM)
Run 8 (QT= 6 mL/s, 1:9, 1200 RPM)
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 10 20 30 40 50 60 70 80 90 100 110 120
Frequency Particle diameter (nm) Run 8 (QT= 6 mL/s, 1:9, 1200 RPM) Run 12 (QT= 18 mL/s, 1:9, 1200 RPM)
▪ Agglomerated particles produced in semi-batch experiments ▪ Continuous processing in the SDR has indicated the presence of smaller sized
particles with narrower PSDs and reduced agglomeration.