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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

Schematic diagram of the experimental setup for spray application, aerosol conditioning and characterization
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Fig3: Schematic diagram of the experimental setup for spray application, aerosol conditioning and characterization

Mentions: The spray module shown in Fig. 2 is the one used for the spray cans. Different adapter-designs allow the inclusion of various spray can geometries (e.g. nominal volume of 150, 250, 400 mL). In the case of SGA, a similar spray-module was used, wherein the spray gun was positioned and protruding components were thread through sealed hollows as shown in the schematic diagram of the experimental setup in Fig. 3.Fig. 3


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

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

Schematic diagram of the experimental setup for spray application, aerosol conditioning and characterization
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig3: Schematic diagram of the experimental setup for spray application, aerosol conditioning and characterization
Mentions: The spray module shown in Fig. 2 is the one used for the spray cans. Different adapter-designs allow the inclusion of various spray can geometries (e.g. nominal volume of 150, 250, 400 mL). In the case of SGA, a similar spray-module was used, wherein the spray gun was positioned and protruding components were thread through sealed hollows as shown in the schematic diagram of the experimental setup in Fig. 3.Fig. 3

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