Biomedical Engineering Reference
In-Depth Information
ZnO
ZnO
ZnO
Attraction
ZnO
NH
3
Attraction
H
2
H
N
N
H
N
H
3
N
N
N
N
NH
2
PEI
NH
2
NH
3
Attraction
Attraction
O
-
O
-
OH
OH
Cotton
FIGURE 18.6
Schematic. diagram. showing. the. interaction. between. white. cotton-PEI-zinc. oxide. nanoparticles.. (From.
Phanichphant,.S.,.et.al.,.Final.Report.on.Development.of.Medical.Textile.Using.Nanotechnology:.Production.of.
Medical.Protective.Garment,.submitted.to.Thai.Textile.Institute,.Ministry.of.Commerce,.Thailand,.2006.(in.Thai,.
unpublished).)
ml,.or.50.ppm..Then.the.amount.of.zinc.oxide.nanoparticles.adsorbed.onto.the.green.fabric.
before. washing. was. determined. using. atomic. absorption. spectrometry.. The. minimum.
effective.dose.of.ZnO.nanoparticles.was.found.to.be.0.025.g/m
2
..This.concentration.of.ZnO.
nanoparticles.was.used.to.pad.the.green.fabric.to.produce.a.medical.protective.garment.
for.industrial.uses.
34.
Copper.and.silver.nanoparticles.were.also.tested.against.
E. coli
.(four.strains),.
B. subtilis
,.
and.
S. aureus
. (three. strains).
43
. The. study. showed. that. the. antimicrobial. action. of. silver.
nanoparticles.was.superior.to.that.of.copper.nanoparticles,.while.a.combination.of.silver.
and.copper.oxide.(CuO).nanoparticles.gave.a.more.complete.bactericidal.effect.against.a.
mixed.bacterial.population.
44
In.separate.research,.CuO.nanoparticles.generated.by.thermal.plasma.technology.were.
characterized. and. investigated. with. respect. to. potential. antimicrobial. applications.. The.
TABLE 18.4
Growth.Inhibition.of.Zinc.Oxide.Nanoparticles.with.50.and.100.ppm.
Concentration.toward.Several.Microbes.
DiameterAcrosstheInhibitionZone(mm)
100μlof50ppmZnO
100μlof100ppmZnO
Rhizopus oligosporus
.(mold)
13
17
Penicillium oxalicum
.(mold)
13
17
Aspergillus fumigatus
.(mold)
15
18
Aspergillus awamori
.(mold)
16
20
Escherichia coli
.(Gram.-)
14
16
Bacillus subtilis
.(Gram.+)
28
32
Staphylococcus aureus
.(Gram.+)
13
14
Source:
.
Phanichphant,.S.,.et.al.,.Final.Report.on.Development.of.Medical.Textile.Using.
Nanotechnology:.Production.of.Medical.Protective.Garment,.submitted.to.Thai.
Textile.Institute,.Ministry.of.Commerce,.Thailand,.2006.(in.Thai,.unpublished).