Polypropylene-MWCNT composite degradation, release, detection, and toxicity of MWCNT during accelerated aging.

ABSTRACT: Nanomaterials (NM) are incorporated into polymers to enhance their properties. However, there are a limited number of studies on the aging of these nanocomposites and the resulting potential release of NM. To characterize NM at critical points in their life cycles, polypropylene (PP) and multiwall carbon nanotube filled PP (PP-MWCNT) plates with different thicknesses (from 0.25 mm to 2 mm) underwent accelerated weathering in a chamber that simulates solar irradiation and rainfall. The physicochemical changes of the plates depended on the radiation exposure, the plate thickness, and the presence of CNT fillers. Photodegradation increased with aging time, making the exposed surface more hydrophilic, decreasing the surface hardness and creating surface stress-cracks. Aged surface and cross-se

SUBMITTER: Han C 

PROVIDER: S-EPMC7377243 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature