Role of Nanoparticles in Life Cycle of Nanocomposites

Published

June 15, 2010

Author(s)

Xiaohong Gu, Guodong Chen, Minhua Zhao, Stephanie S. Watson, Paul E. Stutzman, Tinh Nguyen, Joannie W. Chin, Jonathan W. Martin

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

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 April 19, 2024)