Potential release of carbon nanotubes from their composites during grinding

Ogura, Isamu; Kotake, Mari; Shigeta, Masahiro; Uejima, Mitsugu; Saito, Kenji; Hashimoto, Naomi; Kishimoto, Akira

doi:10.1088/1742-6596/429/1/012049

Cited by 26 publications

(16 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The assessment of risk needs to take into account the widespread use of products containing ENMs, and cannot exclude a potential exposure to ENMs during the whole lifecycle of such products (Reijnders, 2009;Som et al, 2010). To date, there are few available studies about the release of ENMs from nanobased consumer products (Gottschalk and Nowack, 2011), and these studies are especially focussed on nano-based textile products (Benn and Westerhoff, 2008;Kulthong et al, 2010;Lorenz et al, 2012;Windler et al, 2012) and plastics (Vilar et al, 2013;Göhler et al, 2013;Ogura et al, 2013). With regard to ENPs containing paint, the recent experiments of Kaegi et al (2008Kaegi et al ( , 2010, showed that TiO 2 and Ag ENPs may be released from exterior facades paints into surface waters.…”

Section: Introductionmentioning

confidence: 99%

Formulation effects on the release of silica dioxide nanoparticles from paint debris to water

Zuin

Massari

Ferrari³

et al. 2014

Science of The Total Environment

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Formulation effects on the release of silica dioxide nanoparticles from paint debris to water

Zuin

Massari

Ferrari³

et al. 2014

Science of The Total Environment

View full text Add to dashboard Cite

“…The EC measured near the pelletizer may have originated from the cutting of polymer nanocomposite strands which occurred at this piece of equipment. A number of studies have reported protruding CNTs from polymer particles after the cutting, sanding, or abrading of nanocomposites (Cena and Peters, 2011;Hellmann et al, 2012;Huang et al, 2012;Schlagenhauf et al, 2012;Ogura et al, 2013). In addition, a couple of studies have observed the release of free individual CNTs and agglomerated CNTs (Huang et al, 2012;Schlagenhauf et al, 2012;Dahm et al, 2015).…”

Section: Oc-ec Analysismentioning

confidence: 99%

Aerosol Emission Monitoring and Assessment of Potential Exposure to Multi-walled Carbon Nanotubes in the Manufacture of Polymer Nanocomposites

Thompson

Chen

Wang

et al. 2015

ANNHYG

View full text Add to dashboard Cite

Recent animal studies have shown that carbon nanotubes (CNTs) may pose a significant health risk to those exposed in the workplace. To further understand this potential risk, effort must be taken to measure the occupational exposure to CNTs. Results from an assessment of potential exposure to multi-walled carbon nanotubes (MWCNTs) conducted at an industrial facility where polymer nanocomposites were manufactured by an extrusion process are presented. Exposure to MWCNTs was quantified by the thermal-optical analysis for elemental carbon (EC) of respirable dust collected by personal sampling. All personal respirable samples collected (n = 8) had estimated 8-h time weighted average (TWA) EC concentrations below the limit of detection for the analysis which was about one-half of the recommended exposure limit for CNTs, 1 µg EC/m 3 as an 8-h TWA respirable mass concentration. Potential exposure sources were identified and characterized by direct-reading instruments and area sampling. Area samples analyzed for EC yielded quantifiable mass concentrations inside an enclosure where unbound MWCNTs were handled and near a pelletizer where nanocomposite was cut, while those analyzed by electron microscopy detected the presence of MWCNTs at six locations throughout the facility. Through size selective area sampling it was identified that the airborne MWCNTs present in the workplace were in the form of large agglomerates. This was confirmed by electron microscopy where most of the MWCNT structures observed were in the form of micrometer-sized ropey agglomerates. However, a small fraction of single, free MWCNTs was also observed. It was found that the high number concentrations of nanoparticles, ~200 000 particles/ cm 3 , present in the manufacturing facility were likely attributable to polymer fumes produced in the extrusion process.

show abstract

“…The last five studies listed in the table [7][8][9][10][11], the test materials contained nanoparticles throughout the material sample itself, or in one case covering a fabric surface, rather than incorporated into a coating on a plate or panel. The experiments in these studies involved both rotary abrasion and higher speed sanding.…”

Section: Figure 1 Dual Specimen Taber Rotary Abraser With Wood Floorimentioning

confidence: 99%

Characterization of airborne nanoparticle released from consumer products

Persily¹,

Lo²,

Nabinger³

et al. 2014

View full text Add to dashboard Cite

Polymer and other coatings are commonly used to protect, enhance or decorate wood, plastic and metal products used in homes and other buildings. Nanoparticles (i.e., particles having at least one dimension smaller than 100 nm) are increasingly being added to coating formulations to reduce damage as well as to enhance their performance. Because of their small size and large surface area, nanomaterials may exhibit unique physical, chemical and transport behaviors in the environment and in the human body. Research in recent years has indicated that nanoparticles may be potentially harmful to the environment and to human health. In order to better understand human exposure associated with the airborne release of such particles, material specimens with coatings containing nanoparticles were tested in a small environmental chamber in which coated materials were subjected to surface abrasion intended to simulate normal wear and tear. This report describes the experimental approach and the results obtained, which showed minimal airborne release of the nanoparticles in the tested coatings.

show abstract

Potential release of carbon nanotubes from their composites during grinding

Cited by 26 publications

References 9 publications

Formulation effects on the release of silica dioxide nanoparticles from paint debris to water

Formulation effects on the release of silica dioxide nanoparticles from paint debris to water

Aerosol Emission Monitoring and Assessment of Potential Exposure to Multi-walled Carbon Nanotubes in the Manufacture of Polymer Nanocomposites

Characterization of airborne nanoparticle released from consumer products

Contact Info

Product

Resources

About