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Summary

• Coatings and Polymeric Materials overview

• Research of:– Stuart Croll– Dean Webster

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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

O

O

NH

O

O

ONH

O

O

O

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.

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High Throughput Methods

DesignPolymer Synthesis

PolymerScreening

CoatingFormulation

CoatingDeposition

CoatingScreening

DataAnalysis

Database

Accelerate the process of experimentation

NDSU has the most comprehensive high throughput laboratory in the world for polymer and coatings research