coatings and polymeric materials overview research of · chemistry of coatings, conservation of...
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Coatings and Polymeric Materials Personnel ~ 50
• 25 (?) Graduate Students• 5 (?) undergraduate students• 3 Full-time Administrators
– 2 part-time helpers• 1 Research Scientist• 1 Laboratory manager• 2 Laboratory technicians• 5 (?) Post Docs.• 4 Research Professors• 3 Tenure Track Faculty
– 2 openings
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Simple View of Our Research
We all occupy more than one category.
We all make and characterize materials (usually polymeric, for coatings) and polymer-composite systems (usually coatings) from the nano to macro scales.
Non - Corrosion
Synthesis
Corrosion
Non- synthesis
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Dept. Instrumentation
•UV-vis-NIR, Raman, FTIR spectrometers
•Spectrofluorimeter
•Atomic force & other scanning probe microscopy, optical microscope
•GC-MS
•Gel permeation chromatography
•Electrochemical instrumentation
•Comprehensive thermal analysis equipment
•Colloid Characterization
•Particle size measurement
•Accelerated weathering chambers
•Coating application equipment
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Research Interests Other CPM Faculty Members
• Professor Gordon BierwagenCorrosion Control by Coatings, Particle Packing, Physical Chemistry of Coatings, Conservation of Bronze Sculptures
• (Research) Professor Dennis Tallman(used to be in Chemistry Dept)Corrosion, Electrochemistry, electrochemical methods, Conductive Polymers
• Research Asst. Professor Victoria Johnston GellingCorrosion Control, Conductive Polymers, Coatings Characterization
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Research Other Faculty Members (cont.)
• Research Asst. Professor Brian HinderliterModeling & Prediction of Coating Durability, Computer simulations, Coatings Characterization
• Research Asst. Professor Kerry AllaharCorrosion Control by Coatings, Electrochemical modeling, Coatings Characterization
I am now going to focus on research by Dean Webster and myself.
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• Overall:– Experiment and Modeling– Durability, corrosion protection, nanoscale
characterization, flocculation mechanisms in coating systems, art conservation and film formation processes
• Currently:– Polymeric Coating Durability– Polymer Physics– Modified Amino Acid
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Stuart Croll Research Polymer Degradation during Weathering
• Degradation Chemistry
• Size of a degradation event– Atomic Force Microscopy
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Modeling
Monte Carlo simulations
Very flexible and useful approach.
Models microscopic morphological changes.
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Predictions of Deterioration in Fracture Strength
We can model changes in macroscopic properties
Computational chemistryMolecular dynamics
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Corrosion Protection: Modelling and Measuring Performance
Pristine coating
Substrate
Diffusion affected zone
Environment percolation
Maxwell inclusions Combined
Water paths
Water
Water inclusions with some water paths
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There is a capacitance and resistance in parallel for each part of the coating. The interface resistance may vary from infinite to zero depending on how the coating transports water.
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Polymer Physics: Physical Aging Thermal and Mechanical Properties
Polymers gradually approach equilibrium in their glassy, non- equilibrium state.
Translation al movements
Rotational movement s of large groups
Rotational movements of small groups
Effect of the thermal transitions on the molar volume [3]
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Modified Cysteines (Amino Acid with Thiol)
• At first we were looking for materials:– Based on biomaterials– For smart, self-healing coatings– Possibly might make micelles or lipid membranes
• To act as vessels– and /or self - crosslinking temporary repair coating material
(contents of vessels)• Now we think there may be other non-coating possibilities
– Drug delivery systems• These compounds crystallize, make micelles, vesicles and
have synergistic mixing behavior
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Dean C. Webster - Research Program
• Research Areas: Polymer synthesis, crosslinking chemistry, structure-property relationships, combinatorial and high throughput experimentation
• Current Projects:– Novel Fouling-Release Coatings
• Office of Naval Research– Glycidyl Carbamate Chemistry
• US Navy, Air Force– Polymer Templating for Spintronic Devices
• National Science Foundation – ND EPSCoR– Novel Materials for Microelectronic Devices
• Defense Microelectronics Activity, CNSE– Smart Coating Systems for Aerospace
• NASA
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Materials for Microelectronics• Laser Ablatable UV-Curable Coatings
– Use of a laser to cut vias through planarization layer– Nd:YAG Laser @ 355 nm– UV cured epoxy coatings are transparent and ablate poorly– Novel additives were designed resulting in efficient laser
ablation
Polymer, 47, 3715-3726 (2006) and J. Photochem. & Photobiol. A: Chemistry, 185, 115-126 (2007).
Unmodified Modified
Screen-printed Conductive Inks• Zero VOC• UV or Thermal Cure
Technical Conference Proceedings - UV & EB Technology Expo & Conference, Chicago, Il., April 24-26, 2006.
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Multifunctional Glycidyl Carbamate Functional Oligomers
NH
O
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NH
O
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ONH
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Self-Crosslinking
150°C
Prog. Org. Coat., 57, 128-139 (2006).
Coatings have excellent hardness, flexibility, adhesion
JCT Research 2(7), 517-528 (2005)
with Amines
Ambient
Epoxy: Reactivity
Carbamate: Toughness, adhesion
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Marine Fouling
Many marine organisms grow on surfaces
Any Surface!
Fouling by marine organisms• Creates increased drag• Degrades performance• Increases fuel consumption
Transport of organisms to non-native habitats is also a problem
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Marine BiofoulingCritical Issue:- Economic impact
- Ship operation, fuel consumption- Environmental impact
- Transport of non-indigenous species
New non-toxic coatings are needed
Macromolecules 2005, 38, 5857-5859
Diagram courtesy Univ. of Birmingham
Epoxy Primer
PDMS
Polyurethane
Self-stratified siloxane-urethane coatings Coatings with surface microstructure
J. Polym. Sci. Part A: Polym. Chem., 2006, 44, 4880-4894
J. Combi. Chem., 2007, 9, 178-188.