Gu, X.
, Chen, G.
, Zhao, M.
, Watson, S.
, Stutzman, P.
, Nguyen, T.
, Chin, J.
and Martin, J.
(2010),
Role of Nanoparticles in Life Cycle of Nanocomposites, Nanotech2010, Anaheim, CA
(Accessed February 16, 2025)
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Role of Nanoparticles in Life Cycle of Nanocomposites
Published
Author(s)
, , , , , , ,
Abstract
The objective of this study is to investigate the role of ZnO nanoparticles in the life cycle of a waterborne polyurethane (PU) nanocomposite during UV exposure. The effects of loadings and sizes of ZnO nanoparticles on photodegradation of ZnO/PU films were evaluated. The chemical changes of the exposed specimens were examined by Fourier Transform Infrared Spectroscopy (FTIR). Changes in surface morphology were characterized by atomic force microscopy (AFM). The results clearly show that ZnO nanoparticles can act as a photo-catalyst or a photo-stabilizer, depending on the UV exposure conditions. The photoreactivity of the ZnO nanoparticles is affected by the nanoparticle properties (e.g., size and loading). It appears that the polymers in the vicinity of the nanoparticles would be preferentially degraded when the nanoparticles behave as a photo-catalyst, or protected when the nanoparticles behave as a photo-stabilizer.Conference Dates
June 20-25, 2010
Conference Location
Anaheim, CA
Conference Title
Nanotech2010
Pub Type
Conferences
Keywords
AFM, building technology, life cycle, nanoparticles, nanocomposites, UV exposure
Citation
Issues
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Created June 15, 2010, Updated February 19, 2017