Exposure assessment method for products containing carbon nanotubes inside a test chamber with a Taber abrasion machine

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

Matsui, Yasuto^1 ; Nagaya, Taiki^2 ; Nobuyuki, Kato^2 ; Ishibashi, Tomonori^2 ; Yoneda, Minoru^2

Agency for Health, Safety and Environment, Kyoto University, Japan^1

Graduate School of Engineering, Kyoto University, Japan^2

关键词: Examination methods;    Exposure assessment;    High-efficiency particulate air filters;    Measuring instruments;    Quantitative measurement;    Quantitative risk assessment;    Research and development;    Testing environment;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/838/1/012011/pdf
DOI  :  10.1088/1742-6596/838/1/012011

来源: IOP

【 摘 要 】

Polymer/carbon nanotube (CNT) composites exhibit distinguished properties, but more quantitative risk assessments on CNTs are necessary as research and development advances. One method to assess the exact risk is to evaluate the characteristics of nanoparticles generated from CNT composites during sanding or Taber abrasion tests. Some researchers have applied loads to CNT composites using Taber machines and analysed the particles using aerosol-measuring instruments and electron microscopes. However, employing aerosol-measuring instruments is challenging due to the small amount of generated particles. Additionally, the presence of abundant background nanoparticles in testing environments creates issues in quantitative measurements. Our research strives to develop an examination method to measure even very small amounts of nanoparticles generated by Taber abrasion. In this study, a Taber abrasion machine is miniaturised so that it fits inside a small chamber. A high-efficiency particulate air filter is attached to the chamber to eliminate background nanoparticles. Then CNT composites are abraded with the miniaturised Taber abrasion machine inside the chamber and the generated particles are analysed.