develop new polymer nanocomposites; measurement, instrumentation in nanocomposites ; industrial...
Post on 11-Jan-2016
242 Views
Preview:
TRANSCRIPT
• Develop new polymer nanocomposites;
• Measurement, instrumentation in nanocomposites ;
• Industrial applications in nanocomposites;
• Modeling of mechanics of nanocomposites.
Research in nanotechnology:
• Carbon nanofibers (nanotubes) / polymer nanocomposites;
• Nanoclay /epoxy nanocomposites;
• Electrospinning nanofibers;
• Nanomechanics.
Projects:
For general information: Dr. Suong V. Hoa ( hoasuon@alcor.concordia.ca)
• Nanoclay/ Epoxy nanocomposites
0
200
400
600
800
0 3 6 9 12
Clay Loading, phr
G1C
, J
/m2
DM
HPM-E
HPM-A
Area Increase
0.4
0.8
1.2
1.6
2
0 3 6 9 12
Clay Loading , phr
K1C
, M
Pa.
m1/
2
DMHPM-EHPM-A Mixing methods:
DM ─Direct Mixing;
HPM ─High Pressure Mixing.
Fracture toughness G1C increase about 6 times, K1c increase 120%.
• Carbon nanotubes/nanofiber / Epoxy nanocomposites
1.E-14
1.E-13
1.E-12
1.E-11
1.E-10
1.E-09
1.E-08
1.E-07
1.E-06
1.E-05
1.E-04
1.E-03
0 1 2 3 4 5 6 7 8 9 10
nanofiller wt %
co
nd
uc
tiv
ity
S
/cm
EPX + EG
EPX + CNF
EPX + MWNT
E862 + MWNT (acetone)
E862 + MWNT (THF)
Electrical Conductivity increases about 10 decades. Electrical conductive resin can be used for EMI (electromagnetic interference)/ RFI (radio frequency interference) shielding applications.
For general information: Dr. Suong V. Hoa ( hoasuon@alcor.concordia.ca)
• Flame retardance / self extinguishing nanocomposites
•Vertical burning tester (left) & Oxygen Index Analyzer (right)
•Epoxy with 3% I.30E nanoclay show 35% increase in LOI index.
Instrumentation:
• High Presure Machine• Powerful Vacuum Mixer• High Speed Mixer • Brabender IntelliTorque Rheometer / Mixer• Haake Minilab Microextruder
For nanocomposite process: • Break agglomerated particles under 1 μm.• Eliminate even sub-micron air bubbles.
Regular mixing High pressure mixing
SEM of 6wt% I.30E /Epoxy sample
For general information: Dr. Suong V. Hoa ( hoasuon@alcor.concordia.ca)
• Electro spinning
•Tensile Test by MTS nanoBionix: (A) PVA nanofibers, ø2µm; (B) PEO nanofibers ;
A
BInstrumentation:
• MTS NanoUTM : the most advanced machine in nanofiber study.
• Vecco AFM (Atomic Force Microscope)
• Hysitron NanoIndentation
For general information: Dr. Suong V. Hoa ( hoasuon@alcor.concordia.ca)
• Self healing Epoxy
Concordia Centre for Composites
Bridges the research and industrial applications, and promotes the future of nanocomposites.
http://concom.encs.concordia.ca/
Neat sample
Sample with healing agent
healed crack
Cracks healed
For general information: Dr. Suong V. Hoa ( hoasuon@alcor.concordia.ca)
Composite materials used in space applications are susceptible to damage due to space debris, thermal shock, and exposure to UV radiations.
New capsules filled with healing agent and catalyst were used as self healing agents. Different types of environmental conditioning tests were carried out. Preliminary thermal shock test showed healing of cracks in extreme temperature fluctuation environment.
For general information: Christine DeWolf (cdewolf@alcor.concordia.ca)For information regarding facilities and services: Rolf Schmidt (rschmidt@alcor.concordia.ca)
•Design, synthesis, and physical characterization of bio-inspired self-folding systems (Louis Cuccia)
•Study of light-induced electron transfer in organized membrane-bound pigment-protein complexes (Laszlo Kalman)
•Exploring structure-function relationships in photosynthetic pigment-protein complexes (Valter Zazubovits)
3 nm3 nm
BiomimeticsInstrumentationAtomic force microscopyScanning tunneling microscopyMolecular force probeEllipsometryGel permeation chromatographySingle entity detection/spectroscopy
Current applications
•‘Molecular springs’ for biotechnology and nanotechnology
•Artificial energy converters for sustainable future energy production
•Explosives detection
For general information: Christine DeWolf (cdewolf@alcor.concordia.ca)For information regarding facilities and services: Rolf Schmidt (rschmidt@alcor.concordia.ca)
Synthesis and characterization of upconverting lanthanide nanoparticles (John Capobianco)
Use of nanocapsules and nanoparticles in analytical separations (Cameron Skinner)
Nanoparticles and nanocapsules
InstrumentationScanning electron microscopyAtomic force microscopyOptical microscopyCapillary electrophoresisFlow cytometry of particlesLuminescence and fluorescence lifetime measurementsLaser induced fluorescene line narrowing spectroscopyRaman spectroscopy
Current applications– Biolabels and biological assays– Telecommunications– Bioseparations– Extraction and recovery of trace metals from solution
For general information: Christine DeWolf (cdewolf@alcor.concordia.ca)For information regarding facilities and services: Rolf Schmidt (rschmidt@alcor.concordia.ca)
Functional thin filmsDevelopment of functional surface coatings using nanopatterning techniques (Christine DeWolf)
Development of electrochemical measurement techniques for DNA-based biosensors (Marcus Lawrence)
InstrumentationLangmuir and Langmuir-Blodgett film balanceEllipsometryBrewster angle microscopyDynamic surface tensiometerContact angle measurementsAtomic force microscopyFluorescence microscopyCyclic voltammetryChronoamperometryImpedance spectroscopy
Current applications– Ultrahydrophobic surfaces– Biosensors– Biocompatible surfaces– Nanowires
top related