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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

Sectional view of the developed spray-channel for aerosol characterization of spray cans and spray guns
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Related In: Results  -  Collection


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Fig2: Sectional view of the developed spray-channel for aerosol characterization of spray cans and spray guns

Mentions: Due to the multitude of aerosol-analytical disadvantages (e.g. relatively high setup times, fluidic dead zones, different residence times, poor mixing, concentration gradients) accompanied with the use of test chambers, a simple spray-channel (see Fig. 2) made from standardized polypropylene components (EN 1451-1:1999) was developed for the spray aerosol characterization. The main parts of the 1635 mm long spray-channel are an air supply section, a spray module with spray chamber for the inclusion of the spray units, a residence channel, a sampling and an exhaust section.Fig. 2


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

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

Sectional view of the developed spray-channel for aerosol characterization of spray cans and spray guns
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig2: Sectional view of the developed spray-channel for aerosol characterization of spray cans and spray guns
Mentions: Due to the multitude of aerosol-analytical disadvantages (e.g. relatively high setup times, fluidic dead zones, different residence times, poor mixing, concentration gradients) accompanied with the use of test chambers, a simple spray-channel (see Fig. 2) made from standardized polypropylene components (EN 1451-1:1999) was developed for the spray aerosol characterization. The main parts of the 1635 mm long spray-channel are an air supply section, a spray module with spray chamber for the inclusion of the spray units, a residence channel, a sampling and an exhaust section.Fig. 2

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