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Granulometric characterization of airborne particulate release during spray application of nanoparticle-doped coatings.

Göhler D, Stintz M - J Nanopart Res (2014)

Bottom Line: Four different types of coatings doped with three kinds of metal-oxide tracer nanoparticle additives (TNPA) were analyzed.The nanoparticulate fraction amounted values between 10 and 60 no%.Isolated ZnO- or Fe2O3-TNPAs could not be observed.

View Article: PubMed Central - PubMed

Affiliation: Research Group Mechanical Process Engineering, Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Münchner Platz 3, 01062 Dresden, Germany.

ABSTRACT
Airborne particle release during the spray application of coatings was analyzed in the nanometre and micrometre size range. In order to represent realistic conditions of domestic and handcraft use, the spray application was performed using two types of commercial propellant spray cans and a manual gravity spray gun. Four different types of coatings doped with three kinds of metal-oxide tracer nanoparticle additives (TNPA) were analyzed. Depending on the used coating and the kind of spray unit, particulate release numbers between 5 × 10(8) and 3 × 10(10) particles per gram ejection mass were determined in the dried spray aerosols. The nanoparticulate fraction amounted values between 10 and 60 no%. The comparison between nanoparticle-doped coatings with non-doped ones showed no TNPA-attributed differences in both the macroscopic spray process characteristics and the particle release numbers. SEM, TEM and EDX-analyzes showed that the spray aerosols were composed of particles made up solely from matrix material and sheathed pigments, fillers and TNPAs. Isolated ZnO- or Fe2O3-TNPAs could not be observed.

No MeSH data available.


Related in: MedlinePlus

TEM-images of electrostatically deposited spray aerosol particles
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Fig11: TEM-images of electrostatically deposited spray aerosol particles

Mentions: Characteristic TEM-images of electrostatically deposited spray aerosol particles are shown in Fig. 11. It is evident that the used TNPAs ZnO and Fe2O3 in combination with the manner of the performed precipitation (substrate: carbon-coated TEM grids made of copper, Modell SF162, Plano GmbH, Wetzlar, Germany) are well-suited for their recovery even at lower magnification, whereas the used TNPA SiO2 is less suitable because of the lower material contrast and the concomitance of other Si-containing additives that were typically processed within coatings.Fig. 11


Granulometric characterization of airborne particulate release during spray application of nanoparticle-doped coatings.

Göhler D, Stintz M - J Nanopart Res (2014)

TEM-images of electrostatically deposited spray aerosol particles
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4129227&req=5

Fig11: TEM-images of electrostatically deposited spray aerosol particles
Mentions: Characteristic TEM-images of electrostatically deposited spray aerosol particles are shown in Fig. 11. It is evident that the used TNPAs ZnO and Fe2O3 in combination with the manner of the performed precipitation (substrate: carbon-coated TEM grids made of copper, Modell SF162, Plano GmbH, Wetzlar, Germany) are well-suited for their recovery even at lower magnification, whereas the used TNPA SiO2 is less suitable because of the lower material contrast and the concomitance of other Si-containing additives that were typically processed within coatings.Fig. 11

Bottom Line: Four different types of coatings doped with three kinds of metal-oxide tracer nanoparticle additives (TNPA) were analyzed.The nanoparticulate fraction amounted values between 10 and 60 no%.Isolated ZnO- or Fe2O3-TNPAs could not be observed.

View Article: PubMed Central - PubMed

Affiliation: Research Group Mechanical Process Engineering, Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Münchner Platz 3, 01062 Dresden, Germany.

ABSTRACT
Airborne particle release during the spray application of coatings was analyzed in the nanometre and micrometre size range. In order to represent realistic conditions of domestic and handcraft use, the spray application was performed using two types of commercial propellant spray cans and a manual gravity spray gun. Four different types of coatings doped with three kinds of metal-oxide tracer nanoparticle additives (TNPA) were analyzed. Depending on the used coating and the kind of spray unit, particulate release numbers between 5 × 10(8) and 3 × 10(10) particles per gram ejection mass were determined in the dried spray aerosols. The nanoparticulate fraction amounted values between 10 and 60 no%. The comparison between nanoparticle-doped coatings with non-doped ones showed no TNPA-attributed differences in both the macroscopic spray process characteristics and the particle release numbers. SEM, TEM and EDX-analyzes showed that the spray aerosols were composed of particles made up solely from matrix material and sheathed pigments, fillers and TNPAs. Isolated ZnO- or Fe2O3-TNPAs could not be observed.

No MeSH data available.


Related in: MedlinePlus