RT Journal Article
T1 Assessment of nanoparticles release into the environment during drilling of carbon nanotubes/epoxy and carbon nanofibres/epoxy nanocomposites
A1 Starost, Kristof
A1 Frijns, Evelien
A1 Van Laer, Jo
A1 Faisal, Nadimul
A1 Egizabal, Ainhoa
A1 Elizetxea, Cristina
A1 Blazquez, Maria
A1 Nelissen, Inge
A1 Njuguna, James
A1 Elizextea, Cristina
AB The risk assessment, exposure and understanding of the release of embedded carbon nanotubes (CNTs) and carbon nanofibers (CNFs) from commercial high performance composites during machining processes are yet to be fully evaluated and quantified. In this study, CNTs and CNFs were dispersed in epoxy matrix through calendaring process to form nanocomposites. The automated drilling was carried out in a specially designed drilling chamber that allowed elimination of background noise from the measurements. Emission measurements were taken using condensed particle counter (CPC), scanning mobility particle sizer (SMPS) and DMS50 Fast Particulate Size Spectrometer. In comparison to the neat epoxy, the study results revealed that the nano-filled samples produced an increase of 102% and 227% for the EP/CNF and EP/CNT sample respectively in average particle number concentration emission. The particle mass concentration indicated that the EP/CNT and EP/CNF samples released demands a vital new perspective on CNTs and CNFs embedded within nanocomposite materials to be considered and evaluated for occupational exposure assessment. Importantly, the increased concentration observed at 10 nm aerosol particle sizes measurements strongly suggest that there are independent CNTs being released at this range.
SN 1873-3336
YR 2017
FD 2017-10-15
LA eng
NO Starost , K , Frijns , E , Van Laer , J , Faisal , N , Egizabal , A , Elizetxea , C , Blazquez , M , Nelissen , I , Njuguna , J & Elizextea , C 2017 , ' Assessment of nanoparticles release into the environment during drilling of carbon nanotubes/epoxy and carbon nanofibres/epoxy nanocomposites ' , Journal of Hazardous Materials , vol. 340 , pp. 57-66 . https://doi.org/10.1016/j.jhazmat.2017.06.057
NO Publisher Copyright: © 2017 Elsevier B.V.
DS TECNALIA Publications
RD 1 jul 2024