Limits...
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

Visualization of the experimental procedure during EEPS data logging on the example of two single analyzes (q0·cn ≡ dcn/dx); EEPS electrometer noise corrected
© Copyright Policy - OpenAccess
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4129227&req=5

Fig4: Visualization of the experimental procedure during EEPS data logging on the example of two single analyzes (q0·cn ≡ dcn/dx); EEPS electrometer noise corrected

Mentions: After assembling with the spray units, the spray-channel was firstly purged for 10 s with particle-free air before the actual data logging for 60 s began. The first 10 s of the measurement period were performed without any action to receive data for the offset-correction of the inherent EEPS electrometer noise. This was followed by the actual spraying process that lasted for 5 s. During the remaining measurement time, no further interventions were performed. The described measurement procedure led to a characteristic progression in the measurement data as exemplarily shown for the EEPS-data in Fig. 4.Fig. 4


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

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

Visualization of the experimental procedure during EEPS data logging on the example of two single analyzes (q0·cn ≡ dcn/dx); EEPS electrometer noise corrected
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig4: Visualization of the experimental procedure during EEPS data logging on the example of two single analyzes (q0·cn ≡ dcn/dx); EEPS electrometer noise corrected
Mentions: After assembling with the spray units, the spray-channel was firstly purged for 10 s with particle-free air before the actual data logging for 60 s began. The first 10 s of the measurement period were performed without any action to receive data for the offset-correction of the inherent EEPS electrometer noise. This was followed by the actual spraying process that lasted for 5 s. During the remaining measurement time, no further interventions were performed. The described measurement procedure led to a characteristic progression in the measurement data as exemplarily shown for the EEPS-data in Fig. 4.Fig. 4

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