nano-engineered additives for active coatings a.m. rawlett; j.a. orlicki; j.s. lascala; l.t....
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Nano-Engineered Additives for Active Coatings
A.M. Rawlett; J.A. Orlicki; J.S. LaScala; L.T. Piehler; N. Zander; P.S. Smith; J.D.
Demaree; W.E. Kosik; S.H. McKnight410-306-0695
TEDCO APG, MD
20 APR 06
Approved for Public Release
Environmental Contaminants and CWA/BWA
Anthrax
Staph
C. albicans E. coli
“…During the Gulf War seven out of tenArmy casualties were not combat-related.The majority of disease-related casualtieswere caused by personal hygieneproblems.”
Force Protection Battlelab Initiative, Sept. 2001
AR 750-1 requires the use of chemical agent resistant coatings to protect Army
tactical vehicles and support
equipment
Elimination of DS2 decon agent (Summer 2004)
increases need for active biocidal/ chemicidal
additives for military coating
Military Specific Coatings
Self-Directing Materials
EnvironmentEnvironmentEnvironment
Bulk distribution
Surface segregation
Self-segregating materials address several issues
Decreased additive requirement Minimizes mass transport issues Minimizes diffusion limitations Minimal impact on base coating
COATED FABRICSEMULSIONS
TPUsHOT MELTS
TEXTILESEMULSIONS
TPUsPAINTS
CLEAR COATMIL-P-53022
PIGMENTED SYSTEMS2-COMPONENT URETHANE
1-COMPONENT UREAMIL-C-53039
MATERIALS POLYMERS
COATINGS &SURFACTANTS
COATED FABRICSEMULSIONS
TPUsHOT MELTS
TEXTILESEMULSIONS
TPUsPAINTS
CLEAR COATMIL-P-53022
PIGMENTED SYSTEMS2-COMPONENT URETHANE
1-COMPONENT UREAMIL-C-53039
MATERIALS POLYMERS
COATINGS &SURFACTANTS
Universal Transport Vehicle
TOPCOATTOPCOATPRIMERPRIMER
SUBSTRATESUBSTRATE
PRETREATPRETREAT
CARC SystemCross Section
TOPCOATTOPCOATPRIMERPRIMER
SUBSTRATESUBSTRATE
PRETREATPRETREAT
TOPCOATTOPCOATPRIMERPRIMER
SUBSTRATESUBSTRATE
PRETREATPRETREAT
SUBSTRATESUBSTRATE
PRETREATPRETREAT
CARC SystemCross Section
Standard Bulk Modification
Concentrated at Surface
ARL Technique
Standard Bulk ModificationStandard Bulk Modification
Concentrated at Surface
ARL Technique
Concentrated at SurfaceConcentrated at Surface
ARL Technique
Polymer scaffold-Copolymers-Hyperbranched polymers or Dendrimers
“Buoy” groups-Fluorinated Chains-Aliphatic Chains
“Delivered” groups-Ionic species-Bioreactive sites-Catalysts
“Anchor” groupsfor adhesion
Polymer scaffold-Copolymers-Hyperbranched polymers or Dendrimers
“Buoy” groups-Fluorinated Chains-Aliphatic Chains
“Buoy” groups-Fluorinated Chains-Aliphatic Chains
“Delivered” groups-Ionic species-Bioreactive sites-Catalysts
“Anchor” groupsfor adhesion
Control: untreated slide, a: estane coated slide, b: amine terminated in estane, c: Quat modified in estane. Observes no biological growth of S. aureus with Quat modified surfaces and C. albicans with amine terminated modified surfaces.
Biological Hazard Decontamination
Staphylococcus aureus Candida albicans
Untreated Slide
Estane Coated Slide
Amine terminated in estane
Quat-Modified in
Estane
Untreated Slide
Estane Coated Slide
Amine terminated in
estane
Quat-Modified in
Estane
1 Component Polyurea CARC MIL-C-53039
Control
Coatings with HBP
2 Component Polyurethane CARC
MIL-DTL-64159
2 Component Epoxy CARC MIL-P-53022
Integration into CARC coatings
Compatibility with existing coating
systems and MilSpecs
Integrated in various commercial off the shelf paints from a local home improvement store
• Demonstrated repeatable >30X self segregation of active components to the air/polymer interface in coatings
• Scaffold universal. Favorable for attachment of a myriad of reactive species through straight forward chemistry.
• Transitioned to low VOC TPU coating systems
• Integrated into Commercial paints
• Demonstrates activity towards environmental hazards
• Compatible with existing coating systems
• Potential in coated fabrics
Conclusions
Adam M. Rawlett, Ph.D.Research Scientist
Multifunctional Materials Branch/ Materials DivisionU.S. Army Research Laboratory
Attn: AMSRD-ARL-WM-MA
Building 4600Aberdeen Proving Ground, MD 21005-5069
Office: 410.306.0695Fax: 410.306.0676