Poster presentation given during AMiCI Action workshop in Ljubliana March'18

1. State of art
According to European Centre of Disease Prevention and Control (ECDC), every year 5-6% of patients come to nosocomial infections. Due to rapid
spreading of superbacteria, resistant to any antibiotics the situation is becoming serious. Decreasing of the number of hospital infections can be obtained
by using anitibacterial coatings at textiles. Textiles should be antibacterial, coating durable and not harmful for patients. There are plenty of coating
technologies like spraying, dipping, painting, rolling etc. Main disadvantages of those technologies are high price, low durability on cycling washing,
limited antibacterial properites and harmfulness for environment. Ultrasound and microwave technologies can overcome these obstacles. In our
research we are using microwave technology (MSS) for producing highly antibacterial composites of ZnO-Ag which are used as antibacterial coating.
Sonocoating technology is a known method for producing antibacterial coating on textiles [1], neverthless there is necessity for developing more efficient
coatings using less hazardous substrates.
MSS and sonocoating technology convergence
Antibacterial effect
Ultrasoniccoating ofmedicaltextileswith
antimicrobalnanoparticles
Sonocoating technologyMSS technology
High power ultrasounds, when acting on a liquid, cause formation of high number
cavitation vaopur bubbles. After achieving a critical size, they collapse, leading to
very high local pressures reaching several 100MPa. If the liquid is a colloidal
suspensions of NPs, NPs close to implosion centre are violently pushed towards the
surface, and strongly embedded on it (Pic. below). It is called „throwing stone”
method [1].
unstable bubble initial collapse jetting
liquid
water
fiber surface
nanoparticles
stable coating
Sonocoating process takes place in DI suspenion
with ZnO-Ag Nps, without any additional chemicals.
We can vary:
 NPs concentration in suspenion
 Process time and ultrasonic energy
 Temperature of coating process
Fabrics are moving (continuous/intermittent way)
towards the zone of high energy ultrasounds.
Process parameters are monitored in real time:
ultrasonic intenstiy, temperature and NPs
concentration. Geometry of the bath-type setup line
can be adjusted to the size of fabric and production
demand. We are not using expensive liquids as
chemical accelerators.
We focus on scalability and production costs as
low as possible.
Stable coating on cotton fiber (SEM)
An optional bath-type prototype
sonocoating setup line
Short explanation of sonocoating process
ADVANTAGES
- low temperature process 0
30 C
- low use of nanparticlesi n suspenion 50-500 ppm
- short time process (intervals), less than 60 seconds
- enviornment friendly process - DI water as medium
- of coating parametersprecise control
- high coating homogeneity
- great antibacterial effect 99,9%
Staphylococcus aureus ATCC 6538
Escherichia coli ATCC 11229
Antibacterial
activity (A)
Value
growth
6,52
7,25
-3,4
-3,25
Test method: PN EN ISO 20743:2013. Incubation time 24 h. Antibacterial efficiency:
strong if 2 ≤ A < 3 or very strong if A ≥ 3.Antibacterial test effect was carried out by
Microbiological Laboratory IBWCh PCANrAB 388.
Very Strong Antibacterial Effect of coating with Very Low ZnO-Ag concentration
We are also coating metallic implants
with antibacterial agents for veterinary
use.
Thanks to cooperation between IHHP PAS and Ortholigaments Sp z o.o.
reference www.naszalecznica.pl
There is major need for creating
antibacterial interface for preventing
bacterial growth between the side of the
implant inside body and external
environment.
Dog with leg implant coated by
antibacterial NPs
CONTACT US https://labnano.pl
We are looking for people willing to cooperate in the development of a new product and implementation it for commerical market.
Bartosz Woźniak, Jacek Wojnarowicz, Tadeusz Chudoba, Witold Łojkowski
Laboratory of Nanostructures, Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw
ĔÏ ŃĽĪ
Specific
surface area,
as±σ (m2
/g)
Skeleton
density,
ρs±σ (g/cm3
)
Average
particle size
from SSA BET,
d (nm)
Average
crystallite
size,
d±σ (nm)
Actual
content,
EDS,
ZnO+1%Ag 32.8±0.1 5.25±0.06 36 25±7
0.4
ZnO+10%Ag 61.3±0.1 5.20±0.03 17 28±8 5.7
The MSS2 reactor was constructed as part of the CePT project, reference: POIG.02.02.00-14-024/08, financed by the
European Regional Development Fund within the Operational Programme “Innovative Economy” for 2007–2013
Synthesis of ZnO:Ag NPs
Using the Microwave Solvothermal Synthesis (MSS), we obtained ZnO:Ag
nanocomposites with varied contents ofAg.
Microwave Solvothermal Reactor setup (MSS2)
Microwave solvothermal synthesis consists
in using microwaves for heating a liquid
reaction mixture closed in a high-pressure
chamber.The process solutions applied by
us are ahead of the world level and enable
synthesising highest quality nanopowders.
The equipment control enables, among
others: monitoring the equipment status,
monitoring and recording the process
parameters, performing processes in the
manual, semi-automatic and automatic
control mode (procedural control).
email: b.wozniak@labnano.pl
SEM pictures of ZnO-Ag arrangement
table: Characteristics of ZnO-Ag NPs
diagram: X-ray diffraction patterns of ZnO-Ag NPs
AMiCI Cost Action Ljubljana 2018
[1] PERELSHTEIN I., APPLEROT G., PERKAS N., GRINBLAT J., HULLA E., WEHRSCHUETZ-SIGL E., HASMANN A., GUEBITZ G., GEDANKEN A., Ultrasound radiation as
a “throwing stones” echnique for the production of antibacterial nanocomposite textiles, ACS Appl. Mater. Interfaces, 2010, 2 (7), DOI: 10.1021/am100291w