Quantitative measurement of carbon nanotubes released from their composites by thermal carbon analysis

5th Nanosafe International Conference on Health and Safety issues related to nanomaterials for a socially responsible approach

物理学;医药卫生;材料科学

Ogura, I.^1,2 ; Kotake, M.^2 ; Ata, S.^1,2 ; Honda, K.^1,2

National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Ibaraki, Tsukuba

305-8569, Japan^1

Technology Research Association for Single Wall Carbon Nanotubes (TASC), 1-1-1 Higashi, Ibaraki, Tsukuba

305-8565, Japan^2

关键词: Abrasion process;    Harmful effects;    National institute for occupational safety and healths;    Polybutylene terephthalates;    Polymer matrices;    Polyoxymethylene;    Quantitative measurement;    Quantitative method;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/838/1/012014/pdf
DOI  :  10.1088/1742-6596/838/1/012014

来源: IOP

【 摘 要 】

The release of free carbon nanotubes (CNTs) and CNTs partly embedded in matrix debris into the air may occur during mechanical and abrasion processes involving CNT composites. Since the harmful effects of CNT-matrix mixtures have not yet been fully evaluated, it is considered that any exposure to CNTs, including CNT-matrix mixtures, should be measured and controlled. Thermal carbon analysis, such as Method 5040 of the National Institute for Occupational Safety and Health, is one of the most reliable quantitative methods for measuring CNTs in the air. However, when CNTs are released together with polymer matrices, this technique may be inapplicable. In this study, we evaluated the potential for using thermal carbon analysis to determine CNTs in the presence of polymer matrices. Our results showed that thermal carbon analysis was potentially capable of determining CNTs in distinction from polyamide 12, polybutylene terephthalate, polypropylene, and polyoxymethylene. However, it was difficult to determine CNTs in the presence of polyethylene terephthalate, polycarbonate, polyetheretherketone, or polyamide 6.