conductive polymer nanocomposites don klosterman 1 chyi shan wang brian rice khalid lafdi university...
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Conductive Polymer Nanocomposites
Don Klosterman1
Chyi Shan Wang
Brian Rice
Khalid Lafdi
University of Dayton Research Institute (UDRI)300 College Park Dayton, OH 45469-0160937-229-2528 (phone)937-229-3433 (fax)[email protected]
1 presenter
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UDRI: Who We Are
• Not-for-profit research organization
• More than 340 full-time engineers, scientists, technicians, and support staff
• Synergistic teaming of full-time UDRI staff with UD faculty & students
• Facilities located on the University of Dayton campus
• Off-campus operations including on-site R&D contracts at Wright-Patterson AFB; Warner Robins ALC, Georgia; and in Ogden, Utah
• In FY 2003 UDRI performed $53 M of sponsored R&D on 1100 accounts, totaling nearly $53 million (89% government, 11% industrial)
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• Polymers are light weight, corrosion-resistant materials with a wide variety of industrial and military uses.
• Three classes of polymer resins:– Thermoplastic (rigid, meltable, e.g. polyethylene)– Elastomer (stretchable, e.g. rubber)– Thermoset (rigid, not-meltable, e.g epoxy)
• Polymers are generally NOT good conductors of electricity
• However, electrical conductivity is desired in various polymer applications:– Electrostatic dischage, electostatic painting, EMI
shielding,lightning strike protection, etc.
Conductive Polymers
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Prior Art Making Plastics Conductive
10 m
Carbon nanofibers
• Carbon nanofibers:– Highly conductive, but
nonuniform dispersion and/or degraded aspect ratio
10 m
Aluminum powder
• Conductive powders: micro-sized metal filings, carbon black, etc.– Mixes well, but high
loading is required
Melt Blending or High Shear Melt Compounding
Heated, high shear mixer
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UDRI Technology Description
“Method of Forming Conductive Polymeric Nanocomposite Materials and Materials Produced Thereby” (U.S. Patent Application 2003/0039816 A1)
Solvent removal
FilamentsCoatingsThin or thick filmsTubesPanelsComposites
carbon nanofibers• Polymer resin• Affordable carbon nanofibers• Solvent
Ambient Temperature Dispersion process
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Advantages
• 2-3 orders of magnitude more conductive than that produced by melt blending
• Electronic percolation threshold < 1%
• Use of affordable carbon nanofibers
Large aspect ratio retained
Uniform dispersion achieved
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ExampleConductivity of thermoplastic polyurethane film
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Applications & Markets
• Electromagnetic inerference (EMI) shielding• Electromagnetic pulse applications• Electrical signal transfer• Electrostatic painting of panels• Electrostatic discharge• Lightning Strike Protection• Electro-optical devices (photovoltaic cells)
Conductive Paints, Coatings, Caulks, Sealants, Adhesives, Sheets, Tubes, and Structural Components
Industries: Space, Aerospace, Electronic, Automotive, Chemical
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Development Stage• Practiced regularly on laboratory scale at UDRI,
~ 1 lb. batches (polymer + nanofiber)
• Data collected on wide variety of thermoplastic, elastomer, and thermoset polymers
• 2000 ft2 pilot plant and new equipment being installed; scale-up studies underway at UDRI; expect 10-50 lb. batch capacity by spring 2004
– Dry nanomaterial powder handling and storage– Nanoparticle dispersion and solvent removal– Preform fabrication: film extrusion and prepregging– Composite lay-up and filament winding– Composite molding processes, including VARTM,
press, and autoclave– Post cure ovens– Extrusion and fiber spinning.
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Go To Market Strategy
• Nanosperse is working with early adopter companies, resin suppliers, and nano materials manufacturers to develop applications
• Pilot scale product, samples, and R&D support will be provided initially by UDRI and Materials Research Institute (Dayton, OH) through Nanosperse, LLC
• Future production by Nanosperse according to customer requirements
• Exclusive patent license to
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Support Capability
Contact Art Fritts at Nanosperse, 330-670-6849 [email protected], www.nanosperse.com
UDRI has a 40+ year history of polymer and composite R&D. We have a staff of full-time engineers and technicians; we are customer oriented and respect client confidentiality.
• Pilot plant production and R&D• Custom compounding• Standard Master Batch material• Production of films, fibers, plaques,
prepregs• Curing • Testing
The following capabilities will be available to industrial clients through Nanosperse:
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Currently Available Product Forms“By The Pound”, December 2003
• Custom compounded resin/nanofiber batches
See us at the UDRI booth (#24) !!
Letting-down master batch material
Master Batch concentrate material
• Liquid and Paste Master Batch Material– Epoxy– Elastomers
Molded nano-composite plaque
• Molded nanocomposite plaques
• Thin Film Composites
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Also Under Development
• Thermally conductive nanocomposites
• Structural reinforcement
• Tailored functionalization of carbon nanofibers
• Continuous fiber composites containing carbon nanofibers