NANOFILTERS

«NANOFILTERS» – defects-free filtering
material with pore size of ~100 nm suitable for
many biomedical and technical applications
Victor N. Morozov
Laboratory of Nanostructures and Nanotechnologies, Institute
of Theoretical & Experimental Biophysics of the Russian
Academy of Sci.
+7 (964) 567-68-63, vmorozov@gmu.edu
Victor N. Morozov | +7 (964) 567-68-63 | vmorozov@gmu.edu | fb.com/Nanofilters
Institute of Theoretical & Experimental
Biophysics of the Russian Academy of Sci.

Invisible Nylon filter which stops 99%
of sub-micron aerosol particles
• Thickness ~ 0,02 microns
• 1 m2 weights ~ 30 mg
• Optical transparency ~ 96.5%
• Fibers diameter of ~ 10 nm
• Pore size ~ 100-120 nm
Invisible Nanofilter
2Victor N. Morozov | +7 (964) 567-68-63 | vmorozov@gmu.edu | fb.com/Nanofilters

Invisible Nanofilter (more information)
AFM of nylon nanofibers Distribution of nanofiber diameters
Fiber height, nm
Fiberheight,nm

Possible materials
The technology allows to fabricate nanofilters from almost any
polymer material soluble in any solvent.
• Acetyl cellulose
• Nylon
• Polyvinyl alcohol
• Nitrocellulose
• Polystyrene
• Polyacryle nitril
• Polyvinyl
pirrolidone
• Gelatin
• NC (Nitrocellulose,
Cellulose nitrate)
• CA (Cellulose
acetate)
• PVC (Polyvinyl
Chloride)
• N1 ( Nylon craft
ribbon)
• PBD
(Polybutadiene, cis)
• Stix-on (Adhesive)
• EZ RC (Rubber
cement)
• F-400 (Formula 400
Sealing/Caulking)
• QG (Quick Grip,
Adhesive)
• CB (Craft Bond,
Rubber Cement)
• NM ( Non woven
material)
• …
More than 20 materials have been already
employed in fabrication:

Achieved technical characteristics
5
Dimensions 5 – 90 mm
Fibers thickness 2 – 20 nm
10 – 150 nm
to 3 000 nm
Optical transparency 96.5% – 0.1%
Minimal pressure drop
(v= 5 cm/s, 99.97 % for 0.3 µm)
29 Pa
Pore size 100 – 130 nm
Mass density 30 mg/m2
0,01
0,1
1
10
100
0 10 20 30
Penetration,%
Darcy x 102
, m-1
Larger deposition time results in lower
penetration of aerosol and higher
resistance to airflow:
Darcy’ coefficient characterizes resistance to airflow

• Calibrated pores
• Like in a common sieve pores have a definite size, so
that larger than the pore aerosol particles do not
penetrate the filter
• Free of defects
• Filter does not have large pores common to the
standard filters, such as holes burned by sparks and
random area with lower density of fiber
• Optically flat surface
• Reflection of light from the filter and AFM imaging
shows that very small (6-20 nm in diameter)
nanofibers are compressed in a film with thickness less
than the light wavelength, so that dust particles cannot
penetrate deep into the filter and been stuck there
Why our filters are the best?
HEPA
NanoFilter

Our filter have calibrated pores
Our filter behaves as a sieve with calibrated
pores. Penetration of particles larger than
certain size is abruptly blocked.
No penetration of
larger particles

Our filter have calibrated pores
Filtration of a suspension of beads, 1±0.1 mm in
diameter through a series of Nylon-4,6
nanomats with different density fibers (length
per unit area)
June 17
Density of fibers
Penetration No penetration

Our filters are free of defects
Threshold-type penetration is
characteristic to our filters only. No
threshold in HEPA filters

Our filters have optically flat surface
• Nylon nanomat comprising of
fibers,
10 nm in average diameter
• Average diameter of fibers ~
1/10,000 of human hair
• Thickness ~0,02 microns;
• 1 м2 weights ~ 10-30 mg
60 mm

Comparison with HEPA filters
Difference between the conventional
and new nanofilters
Thin and flat
Fluffy

Comparison with HEPA filtering material
Property HEPA filter Our nanofilter Notes
Penetration ~0.01% (РФМ-3,
ФПП-15-1,5)
~0.01% Depends on (i) fiber length per unit area, (ii) fibers packing
order, and (iii) on fiber diameter
Resistance to airflow
at 5 cm/s
75 Pa (РФМ-3,0) 30 Pa Depends on fiber length per unit area and fiber diameter
Capturing capacity High, depends on
surface area and
thickness
Low, equivalent to
geometric surface area
Capturing capacity depends on the filter volume where
particulate matter can be accumulated
Cleaning ability Hard to clean Deposited nanoaerosol
can be removed
Standard HEPA filter includes a “fluffy” filtering material
Our filter has optically flat surface
Transparence Not transparent Transparent Transparency increases with decrease of fiber diameter
below light wavelength
Mass per unit area 30±5 g/m2
ФПП-15-1,5
~10-30 mg/m2 Difference is due to different diameter (2 microns in the
standard filter vs. ~0.01 micron in our)

Comparison with filters fabricated by
the conventional technology
Resistances to airflow of different electrospun
nanofilters having 99.97% collection
efficiencya for 0.3 µm aerosol particles at a
face velocity of 5 m/sec.
Filtering properties of Nylon nanomats,
manufactured by our and conventional
techniques.
Polymer ( span from solvent)
Knudsen number
(fibers diameter,
nm)
Pressure
dropb, Pa
OUR FILTER Nylon-4,6 (formic acid) [1] 6 (12) 29.5
Nylon-6 (formic acid) [2] 0.65-3.25 (20-100) 125.5
Nylon-6 (formic acid) [3] 0.69 (94) 224.4
Nylon-6 (formic acid) [4] 0.33 (200) 555
Polyurethanea (DMF) [5] 0.36 (180) 272.9
PLA (DCM 9%-DMAc 91%) [6] 0.24 (274) 111
HEPA[4] <0.1 (>650) >390
References
1. A.Y. Mikheev, Y.M. Shlyapnikov, I.L. Kanev, A.V. Avseenko, V.N.
Morozov, European Polymer Journal, 2016, 75, 317–328.
2. Y. Y. Kuo, F. C. Bruno, J. Wang, Aerosol Sci. Technol. 2014, 48, 1332–1344.
3. C. H. Hung, W. W. F. Leung, Sep. Purif. Technol. 2011, 79, 34–42.
4. Y. C. Ahn, S. K. Park, G. T. Kim, Y. J. Hwang, C. G. Lee, H. S. Shin, J. K. Lee,
Curr. Appl. Phys. 2006, 6, 1030–1035.
5. H. J. Choi, S. B. Kim, S. H. Kim, M. H. Lee, J. Air. Waste Manag. Assoc.
2014, 64, 322–329.
6. Z.Wang C. Zhao Z. Pan, J. Colloid and Interface Sci. 2015, 441, 121–129.
Notes to Table 1
aCollection efficiency for this filter was measured at a face velocity of 0.5 m/sec,
in all other cases at 5 m/sec.
bPressure drop on filters at a face velocity of 5 cm/sec.

Price comparison with Petryanov’s
filtering material
Large-scale production:
With 400 spinnerets the machine
will produce 10 m2 of filter in one
hour
Petryanov’s filtering tissue
(Фильтрполотно Петрянова ФПП-15-
1,5 / ТУ 2568-411-05795731-2008)
99.99 % retention of 0.3 micron
particles
170- 250 rubles per square meter
~ 3-4 $
Price of manufacturing of our filters is
estimated
< 2 $/m2
Price of polymer ~ 0.2 $
Electricity 0.01 $
Labor ~ 5 $
Indirect cost ~ 7 $
Total cost 1.2 $ /m2

IP protection

• Nasal filters
• Analysis of airborne pathogens
• Filters in non-contact diagnostics of lung diseases
• Invisible anti-dust (smoke) curtain
• Protect electronic devices from dust
• Filter self cleaned by engine pulse jet
Tested and suggested applications

Application: Nasal filters
Nasal filters prototypes were made of the new filtering material
(fabricated on a 3-d printer)

There are a lot of nasal filters on the market
July 04, 2017

Filters comparison. Our filter is the best!
Through a
Japanese
filter
Passed
through our
filter
Control

Our filter is the best
because it combines
high retention of
aerosol with a low
resistance to airflow
June 17 20Penetration of aerosol, 1 micron in size
Resistancetoairflow,arbunits Our
filter

Application: Analysis of airborne pathogens
Micro- and nanoaerosol collectors
Simple filtering device (~4 L/min) A filtering probe on a household vacuum cleaner allows to collect
micro- and nanoaerosol particles at a rate of 0.6-1 m3/min

All collected particulate matter is then completely transferred into a solution
Nanofilter Water
Aerosol

Such filters have been successfully used to study nosocomial infections in a
tuberculosis clinic in Moscow (PCR for TB and Staph. aureus in collected probes)
Three cell of Mycobacterium tuberculosis cells in 1 m3 of air can be detected!!
Water-soluble
nanofilter

Bacteria and viruses in the Moscow subway stations?
Our filters are used to collect airborne DNA (RNA) biomarkers for further
metagenomic analysis of species in the subway air.

Where else analytical nanofilters might be
used?
• In walk-through detectors
Epidemiological control in airports
• In transportation vehicles
(test air for the presence of MERS corona
viruses, swine flu, SARS and other
infections)
• In sensitive industry
(to avoid contamination of products and
to protect personnel)

Application: Filters in non-contact
diagnostics of lung diseases
Disposable filters are used for collection of exhaled
microdroplets for further analysis of lung disease biomarkers

Application: Invisible anti-dust curtain
Optical transparency of our filters may be exploited in
Invisible anti-dust (smoke) curtain

Application: protection of electronic devices
Nanofilters may protect electronic devices from dust
Collected dust may be cleaned with a vacuum cleaner

Application: protection of home appliances
Technical filters may be cleaned with a vacuum cleaner

Application: Filter self cleaned by engine
pulse jet
Air cleaner pressure drop versus miles traveled
in 20 mph convoy test in desert conditionsM1 Abrams tank with pulse-jet air cleaner and nanofiber filter
system for filtration of the turbine combustion air

Our team
31
• Our team includes highly experiences scientists, engineers and technologists capable of successful R&D
• We have a support from leading Russian and international specialists in biophysics and in biomedicine
techniques.
Morozov Viktor Nikolaevich
Science Director
Doctor of phys. math., professor
Head of Department Laboratory of Nanotechnologies and
Nanostructures at ITEB RAS. Pushchino, Russia.
Res. Assistant Professor of the National Center for
Biodefense and Infectious Diseases, George Mason
University, Manassas, Virginia.
Mikheev Andrey
Chief researcher
PhD Institute of Theoretical and Experimental
Biophysics RAS,
M.S. Belgorod National Research University
Avseenko Vasily
CEO
MBA Russian Presidential Academy of National
Economy and Public Administration, Moscow State
University
Ex. PHARMIMEX, PHARMABIO, RUSNANO
Commercialization and sales / Finance and investment
Sizov Alexey
Chief Engineer, CTO
Moscow State Academy of Instrument
Engineering and Informatics
UPS RAS, LLC "Alditek“
Engineer, Production

• We are looking for a STRATEGIC
PARTNER in development of
new application for our filtering
material
Thank You!
Contact info
Victor N. Morozov
vmorozov@gmu.edu
+7 (964) 567-68-63
Andrey Mikheev
2miheev@gmail.com
+7 (965) 313-81-82
Vasiliy Avseenko
avseenko@gmail.com
+7 (985) 970-04-85
What are we looking for?

NANOFILTERS

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