nano technology in marine coatings (paints)events.nace.org/conferences/imcs2008/papers/22.pdf · 3....
TRANSCRIPT
STORY
Of
TODAY
Progress in Protective Coatings
Nano Technology in Marine Coatings
Conclusion
Paint vs. Composite
PAINT
Before Application
Resin
Filler & Pigment
Additives
Solvents
Fluid
After Application
Resin
Extender &
Reinforcements
Additives
Material
Drying
And/or
Curing
1. Paint vs. Composite
INGREDIENTS
PROPERTIES
NEEDED
FUNCTIONS
PAINT COMPOSITE
RESINS
FILLERS & PIGMENTS
ADDITIVES
SOLVENTS
RESINS
EXTENDERS
ADDITIVES
ADHESION
PERMEABILITY
HEAT & LIGHT STABILITY
APPLICATION
TOUGHNESS & STRENGTH
HEAT RESISTENCE
DIMENSION STABILITY
PROCESSING
PROTECTION / DECORATION
of MATERIALS or STRUCTURES
PARTS OF MACHINERY
STRUCTURE FRAME
HOUSING
1. Paint vs. Composite
2. Progress in Protective Coatings
Next Protective
Coating Series
Tar Free
Epoxy
Coal Tar
Epoxy
Series
Red Lead
Alkyd
Series
- Good materials for barrier protection, economic,
- Good Flexibility & Substrate tolerance
- Dark color only available, Tar bleeding, Carcinogenic etc.
-1940s ~ 1950s
- Use for long life protection of steel structures
- Need for greater protection performance &
- Zinc-Rich Primers were introduced
- Strongly resistance to chemicals & seawater
- Excellent anticorrosion, Light color available & easy inspection
- High solid & Low VOC, Good workability & fast cure
- Upgrade the coating performance
- Environmentally friendly (Low VOC & Solvent –Free)
- Meet the IMO PSPC Regulation
- Upgrade & Integration Universal Primer
2. Progress in Protective Coatings
Solvent Free
Epoxy
Modified
Epoxy
Pure Epoxy
Full Application in Water Ballast Tank
- Modified Epoxies are commonly specified by Chinese and Japanese Builders.
- Korean builders prefer usually Pure Epoxy system (Yard Standard).
- Recently, Solvent-Free Epoxy system is emerged as the Water Ballast Tank
coating in some European market.
- 90% ~ 95% of Water Ballast Tank are now coated with either Modified Epoxy
or Pure Epoxy systems.
2. Progress in Protective Coatings
Materials
Structure
Function
TECHNIQUE
Introduce New Technology
To Marine Coatings
anticorrosive Pigments selection
Resin Technoloyg & Synthesis
Filler Charging & selection
Accumulated Formulation skill
3. Nano Technology in Marine Coatings
Nano Technology- Contain very small number of particles : Size Effect
- Electronic states quite different from those of bulk : Size Effect
- Contain large portion of surface particles : High surface activity
Encapsulating Technology of PCMs- Upgrade the performance of Nano Characteristics
- Maintain the integrity of the enclosed materials
- Possible to manage the thermal equilibrium in situations
- Possible to control the performance of end-use applications
Surface Modification
3. Nano Technology in Marine Coatings
Definition of Nano Particles by SIZE
- Particles having size less than 0.1㎛(100㎚)
- 1st Generation Nanoparticles : < 100㎚
- 2nd Generation Nanoparticles : < 10㎚
3.1 Nano Technology
1. Small size effect
- Contain very small number of particles
- Electronic states quite different from those of bulky particles
2. Large surface effect
- Contain large portion of surface particles
- High surface activity
3. Change the dimensional properties
- Three-dimensional ⇒ Two-dimensional
Nanocomposite
Mechanical Properties
-Dissemination and interfacial
interactions with the polymer
matrix
-Possible to obtain different
reinforcing levels on mechanical
properties such as abrasion and
impact strength
Chemical Properties
-Reactivity is enhanced by high
surface area / volume ratio and
potential homogenous distribution
of nanoparticles
-Possible to obtain different
reinforcing levels on properties of
adhesion, barrier effect and crack
resistance
Other Properties
-Magnetic Properties
-Optical Properties
-Electrical Properties
-Thermal Properties
-Biological Properties
Characteristic of Nano Particles & Nanocomposite
<Inductive Effect>
-Epoxy resin / Nanoparticles composite can bring out an “ inductive effect”
-Inductive effect can produce large amount of “ Crazes”
-The amount of mechanical and abrasive energy could be absorbed
<Surface Effect>
-The well dispersed Epoxy resin / Nanoparticles composite have great
interaction with each other
-More shear and tensile energy could be absorbed when crack occurred
Mechanism of Mechanical Property Improvement
Test Results of Corrosion Protection Improvement
Nanocomposite enables more particles per unit area…and..Enhance the compactness of the coating film.
Nano-composite systemMicron-composite system
Water (H2O) Water (H2O)
Micron Particles
Nano Particles
Maximize Barrier effect !!
0% Nanoparticle
Composed
5% Nanoparticle
Composed
10% Nanoparticle
Composed
Cycle Corrosion Test (ISO20340)
3.2 Encapsulating Technology of PCMs
Characteristic of Phase Change Materials(PCMs)
Energy
Energy
Solid
State
Liquid
State
Energy
Energy
Phase Changing Point
General PCMs are changed from liquid to solid &
solid to liquid with the temperature range
Surface Modification &
Encapsulating
Unstable !!
Solid
State
A
Most stable !!
Solid
State
B
Surface Modification & Encapsulation PCMs are not changed
from liquid to solid & solid to liquid with the temperature range
Phase Changing Point
Encapsulated double Skin
1. Patent : 10-0481283
2. Patent App. : 10-2004-0056752
3. Patent App. : PCT/KR2005/002371
3. Nano Technology in Marine Coatings
Mechanism of Mechanical Property Improvement
2nd Encapsulated Skin
1st Encapsulated Skin
Hydrophobic Surface
Nano Particle Size
(100nm ~ 200nm)
Nano Particle Size1) Small size effect
2) Large Surface effect
3) Maximize Chemical bond & adsorption
4) Improve crack & abrasion resistance
Hydrophobic Surface- Improve anticorrosive Properties
Phase Change & Latent Heat 1) Not occur phase change & Crack Resistance
2) More stable wide range of temperature
3) Free Volume effect
- Extend recoating Interval
- Enhance interface adhesion
102nm
Test Results of Coating Performance Improvement
0% Nanoparticle
Composed
10% Nanoparticle
Composed
10% Encapsulated
Nanoparticle Composed
Thermal Shock Cycle Crack Test
0% Nanoparticle
Composed
10% Nanoparticle
Composed
10% Encapsulated
Nanoparticle Composed
Salt Fog Test(1,500 hours)
Composite Nanocomposite Encapsulated Nanocompostie
Mechanism of Re-Coating Interval Improvement
Easily Penentrate
Resins & Solvents
2nd
Coat
Substrate
1st Coat
General Pigments
Resin & Co-Polymer
PCMs
Free Volume
PCMs
Heat(30℃~60℃)
Absorb heat energy
Volume expansion
Free Volume
Maximize!!Surface Area
Chemical Bond
Physical Adsorption
Improve!!Recoating Interval
Interfacial Adhesion
4. Conclusion
1st Generation Epoxy AC SeriesStrong resistances to chemicals & seawater Excellent
anticorrosion, Light color available High solid & Low VOC,
Good workability & fast cure
Adopt Nano Technology & Nanocomposite- Modified Double Skin Encapsulated PCMs
- Increase the effect of Nano-particles
- Improve the film performance
- Improve Re-Coating interval
Adopt Aluminum pigment to Improve Performance- Improve barrier effect for anticorrosive properties
- Improve crack & abrasion resistance
Adopt Nanocomposite & Double Skin Encapsulated PCMs
- Maximize barrier effect
- Maximize crack & abrasion resistance
- Upgraded & Integrated Universal Primer of
KCC’s Anticorrosive Coating Series…………
2nd Generation Epoxy AC Series
Next Generation
► Linda S. Salem, Carboline Company “ Epoxies for Steel”
► Johnny Eliasson, Stolt-Nielsen Transportation Group, and Rodney Towers, Safinah
Limited “ The Future of Ballast Tank Coatings”
► Christopher D Rudd, University of Nottingham Robert W Shaw, US Army European Research
Office “ Nanostructures in Polymer Matrices”
► Dr. Lgor Chmutin, Head of Laboratory of nanocomposites “ Polymer Nanocomposites : Prospects
of application”
► Quan Shi, Li Wang, Haojie Yu, Song Jiang, Zhao, Xiaochen Dong “ A Novel Epoxy Resin / CaCO3
Nanocomposite and its Mechanism of Toughness Improvement”
► Brady, Dr. Robert, Jr., and Clive H. Hare. “The Development of a High-Solids Epoxy Polyamide
Coating Line” Journal of Protective Coatings & Linings of April 1989 : 21 - 36
► Munger, Charles G. “Corrosion Prevention by Protective Coatings”
► R. Zandi-Zand., A. Ershad-Langroudi., A. Rahimi. “Silica based organic-Inorganic hybrid
nanocomposite coatings for corrosion protection”
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