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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

Transformed and scaled number weighted particle size distributions determined by EEPS; data based on the first of the 5–12 performed analyses for each configuration
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Fig7: Transformed and scaled number weighted particle size distributions determined by EEPS; data based on the first of the 5–12 performed analyses for each configuration

Mentions: To visualize the size distribution and the relative amount of released particles over the whole measurement time, the PNC of each class (class index k) was accumulated over the time increments (time index i) of the measurement procedure, corrected by the used dilution factor φ and related to the class width. This procedure was performed using the EEPS-data and logarithmic class width and led to the transformed and scaled number-weighted PSD0 of released particles as shown in Fig. 7.Fig. 7


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

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

Transformed and scaled number weighted particle size distributions determined by EEPS; data based on the first of the 5–12 performed analyses for each configuration
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig7: Transformed and scaled number weighted particle size distributions determined by EEPS; data based on the first of the 5–12 performed analyses for each configuration
Mentions: To visualize the size distribution and the relative amount of released particles over the whole measurement time, the PNC of each class (class index k) was accumulated over the time increments (time index i) of the measurement procedure, corrected by the used dilution factor φ and related to the class width. This procedure was performed using the EEPS-data and logarithmic class width and led to the transformed and scaled number-weighted PSD0 of released particles as shown in Fig. 7.Fig. 7

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