Topics Covered
Integrated Family of Technologies
Wood Preservation
Marine Antifouling
Textile Fibers
UV-Attenuating Coatings
Permanent Coatings
Thermoplastics
Products, Data and Specifications
Typical Properties
Zinc Oxide Nanopowders
NanoTek® Zinc Oxide 1701
NanoTek® Zinc Oxide C1 1716
NanoTek® Zinc Oxide C2 EXP 1726
Zinc Oxide Dispersions
NanoShield® ZN-2000 Series Zinc Oxide
Dispersions for Paints
NanoShield® ZN-2000, 50wt% EXP 1754
NanoShield® ZN-2001, 50wt% EXP 1757
NanoShield® ZN-3000 Series Zinc Oxide
Dispersions for Textile Coatings
NanoShield® ZN-3008C, 50wt% EXP 4023
NanoShield® ZN-3010, 50wt% EXP 1769
NanoShield® ZN-3014A, 50wt% EXP 4022
NanoShield® ZN-5000 Series Zinc Oxide
Dispersions for Curing Catalyst Applications
NanoShield® ZN-5060, 50wt% EXP 4024
Organic Borne Zinc Oxide Dispersions
for Paints
NanoTek® Z1102PMA, 50wt% EXP 1707
Integrated Family of Technologies
As a leader in the field of nanomaterials technologies, Nanophase has evolved from solely a producer of nanoparticles
into an integrator of commercially scaled nanomaterial technologies focused
on market and customer applications. Nanophase Technologies Corporation manufactures a variety of
nanocrystalline powders in commercial quantities. The nanocrystalline metal
oxides typically have a mean particle size less than 100 nm, are non-porous
single crystals, have defined surface chemistry, and are chemically pure. Further
modification of these materials often involves vapor-phase coating to prepare
a surface-modified dry powder, or liquid phase processing to prepare a dispersion
that is compatible with the application. Nanophase’s family of integrated technologies economically produces
nanocrystalline materials and then nanoengineers those materials to fit customer’s
needs.
Figure 1. Nanophase development process
Nanophase’s development process is designed to produce the most
advantageous nanomaterials solution for an application. The foundation
technologies are the patented Physical Vapor Synthesis (PVS) process and patent pending NanoArc® Synthesis (NAS) process. These processes use plasma
energy to produce pure, non-agglomerated, non-porous, single-phase
metal and mixed metal oxide nanoparticles at annual capacities measured
in tens of thousands of kilograms per reactor. Nanoparticle size and
surface chemistry can be tailored for applications as the nanomaterial
is produced.
Wood Preservation
Due to the small size of the nanomaterials,
penetration into a porous surface rather than simple surface adhesion
can be achieved. With the discontinuation of CCA wood preservation
materials for residential uses by the end of 2003, the wood industry
is eagerly searching for cost-effective long-lasting anti-microbial
products that will allow wood to perform well in outdoor applications.
New formulations are usually reported as being more health-friendly
and environmental-friendly, but longevity of performance is often
missing. The incorporation of NanoTek® products, including zinc oxide,
doped zinc oxides into the wood preservation formula helps to provide
the required longevity of performance.
Marine Antifouling
Due to the small size of the nanomaterials,
the particles are held in the coating lattice and are not readily
leached out of the coating by the marine environment, while slowly
releasing ions to help provide longer-term anti-fouling character.
By the end of 2003, tributyl tin compounds will no longer be approved
for use in marine antifouling coatings by the EPA. The need for longevity
of antimicrobial activity in marine environments has been recognized,
and is not fully addressed using only combinations of organic biocides
and copper oxide. NanoArc® copper oxide or doped zinc oxides can reside
permanently in marine coating formulations and can increase the lifetime
of the antimicrobial activity, meaning that cleaning and re-application
cycles can be extended.
Textile Fibers
Nanoparticles have been incorporated
into products such as nylon, polypropylene and other polymers to provide
long-term antimicrobial character even in harsh environments and after
extensive thermal cycling. The need for minimizing or eliminating
microbial growth on a variety of textile-based substrates has become
a major topic of discussion in numerous industries, including healthcare,
home furnishings, filtration and apparel, among others. NanoTek® zinc
oxide or doped zinc oxides, due to the small particle size, can be
readily incorporated into synthetic fibers such as Nylon prior to
extrusion through spinnerets to impart antimicrobial activity with
minimal effects on color and clarity, surface gloss, physical properties
and melt flow properties. NanoTek® products may also be incorporated
into coatings that can be applied to staple fibers to impart antimicrobial
activity. Such applications include carpet fibers, water filters of
various types, fabrics for use in healthcare facilities and various
institutions, activewear and other apparel, home furnishings and a
variety of non-woven applications including the transportation and
bedding industries. Zinc oxide is FDA approved for skin contact applications
and NanoTek® zinc oxide is produced under cGMP conditions and is approved
as an active ingredient for personal care products.
UV-Attenuating
Coatings
The incorporation of nanomaterials
in surface coatings can provide long-term protection from harmful
UV radiation in harsh environments without significantly effecting
optical clarity, gloss, color or physical properties. Degradation
of substrates through exposure to ultraviolet light is an old problem,
but now there is a new and permanent solution. Whether the substrate
is metal (automotive clear-coats), glass (windows and architectural
glazing) or polymeric (plastic sheets and building products), UV attenuation
may be critical to the long-term performance of the substrate or items
that the substrate protects. Incorporation of NanoDur® zinc oxide
or doped zinc oxides into clear surface coatings can help to attenuate
unwanted UV light without significantly sacrificing clarity, gloss
or physical properties. Additionally, the NanoDur® products will not
wear out over time as organic UV absorbers do, and they can withstand
high temperatures and harsh conditions during processing without being
deactivated. The NanoDur® products can also be surface treated through
proprietary technology to ensure compatibility with a variety of coating
systems.
Permanent Coatings
Long-term antimicrobial activity
can be imparted in many coating formulations through the incorporation
of nanomaterials. The desire for permanent coatings to impart long-term
antimicrobial or bacteria-stat properties to coated products has been
expressed in a variety of industries, including healthcare, industrial
and institutional cleaning, food processing, food service, and general
paints and coatings. NanoTek® zinc oxide or doped zinc oxides can
be fully dispersed into a wide variety of coating formulations, including
urethanes, acrylics and vinyl acetates and have shown utility in UV
curable and thermosetting coatings as well as in water-based coating
systems.
Thermoplastics
Long-term antimicrobial needs in
various plastic, rubber and composite materials have been increasing
in recent years. Nanomaterials can provide cost-effective longevity
of activity even in harsh environments and after significant thermal
history, separating them from the more unstable organic biocides.
NanoTek® zinc oxide or doped zinc oxides can be fully dispersed into
thermoplastic product formulations that are subsequently fabricated
via injection molding, extrusion, blow molding, thermoforming or other
typical plastic fabrication techniques. Antimicrobial activities are
imparted to the article while the small particle size results in minimal
effects on color, clarity, surface gloss, physical properties and
melt flow properties of the finished product. Applications for antimicrobial
plastic parts include children’s toys, refrigerator liners and other
appliance parts, interior and exterior wall coverings, adhesives,
caulks and sealants and food processing and food service equipment.
Zinc oxide is FDA approved for skin contact applications and NanoTek®
zinc oxide is produced under cGMP conditions and is approved as an
active ingredient for personal care products.
Products, Data and Specifications
Figure 2. NanoTek® Zinc Oxide
Typical Properties
- ZnO, Purity = 99+%
- APS 60 nm (determined from SSA)
- SSA = 18 m2/g (BET)
- Appearance = White powder
- Bulk Density = 0.25 g/cc
- True Density = 5.6 g/cc
- Morphology = Elongated
- Crystal Phase = Zincite (hexagonal)
Zinc Oxide
Nanopowders
NanoTek®
Zinc Oxide 1701
NanoTek® Zinc Oxide, due to the
small particle size, can provide UV protection and antimicrobial properties
while maintaining a high level of transparency in coatings, polymers,
caulks, adhesives and other resin systems.
NanoTek®
Zinc Oxide C1 1716
NanoTek® Zinc Oxide C1 has a hydrophobic,
nonpolar coating to aid dispersing in organic systems.
NanoTek®
Zinc Oxide C2 EXP 1726
NanoTek® Zinc Oxide C2 has an oleophilic,
polar coating to aid dispersing in organic systems.
Nanophase
has worked diligently for years to develop expertise in dispersing
nanomaterials in water, polar organics and non-polar organics.
We offer most of our products in one or more standard dispersions.
We also offer the service of dispersing a nanomaterial in the bulk
medium of your choice as long as it is of low viscosity, non toxic,
and has a flash point greater than 100°F.
Zinc Oxide
Dispersions
NanoShield® ZN-2000 Series Zinc Oxide Dispersions for Paints
NanoShield® ZN-2000, 50wt% EXP 1754
Water borne zinc oxide dispersion
is suitable for incorporation in water compatible coatings to improve
UV stability and protect against mold, mildew and fungal growth.
NanoShield® ZN-2001, 50wt% EXP 1757
Water
borne zinc oxide dispersion is suitable for incorporation in water
compatible coatings. Similar to ZN-2000, but is formulated with
rheology modifier to reduce the tendency for gravimetric settling
during storage.
NanoShield® ZN-3000 Series Zinc Oxide Dispersions for Textile Coatings
NanoShield® ZN-3008C, 50wt% EXP 4023
NanoShield®
ZN-3008C is a cationic dispersion of zinc oxide in water designed
to be incorporated in coatings applied to a fabric or non-woven substrates.
Zinc oxide is generally used to provide UVa and UVb blocking, as well
as anti-reddening and anti-inflammatory skin effects, antimicrobial
activity, and odor control.
NanoShield® ZN-3010, 50wt% EXP 1769
NanoShield®
ZN-3010 is a non-ionic dispersion of zinc oxide in water designed
to be incorporated in coatings applied to a fabric or non-woven substrates.
Zinc oxide is generally used to provide UVa and UVb blocking, as well
as anti-reddening and anti-inflammatory skin effects, antimicrobial
activity, and odor control.
NanoShield® ZN-3014A, 50wt% EXP 4022
NanoShield®
ZN-3014A is an anionic dispersion of zinc oxide in water designed
to be incorporated in coatings applied to a fabric or non-woven substrates.
Zinc oxide is generally used to provide UVa and UVb blocking, as well
as anti-reddening and anti-inflammatory skin effects, antimicrobial
activity, and odor control.
NanoShield® ZN-5000 Series Zinc Oxide Dispersions for Curing Catalyst
Applications
NanoShield® ZN-5060, 50wt% EXP 4024
Water borne zinc oxide dispersion
is suitable for curing or cross linking of both natural and synthetic
latex polymers.
Organic
Borne Zinc Oxide Dispersions for Paints
NanoTek®
Z1102PMA, 50wt% EXP 1707
Zinc oxide dispersion in Dowanol
PMA is suitable for incorporation in a wide variety of coatings formulations
to improve UV stability and protect against mold, mildew and fungal
growth.
Source: Nanophase
For more information on this source please visit Nanophase