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Photochemical behavior of polylactide/ZnO nanocomposite films.
Biomacromolecules. 2012 Oct 08; 13(10):3283-91.B

Abstract

This study reports the effect of light on PLA/ZnO nanocomposites films produced by melt-extrusion. The attention focused on the discrimination between the photocatalytic degradation of PLA provoked by ZnO and the UV screening effect of the ZnO nanoparticles. The chemical modifications of PLA induced by UV light irradiation were analyzed using infrared spectroscopy and completed through the analysis of the low-molecular-weight photoproducts using IC and SPME and the characterization of chain scissions with SEC. A comprehensive mechanism for the photooxidation of PLA was then proposed. The results indicated that the photocatalytic activity of ZnO nanoparticles induces the oxidation of PLA. Because ZnO limits the penetration of light inside the samples, this effect mainly concerns the first micrometers at the surface of the exposed samples. Cross-sectional analysis using micro-IR and ATR-IR spectroscopies was performed to highlight the degradation profile in the PLA/ZnO nanocomposites.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Therias S
Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France.
Larché JF
No affiliation info available
Bussière PO
No affiliation info available
Gardette JL
No affiliation info available
Murariu M
No affiliation info available
Dubois P
No affiliation info available

MeSH

NanocompositesParticle SizePhotochemical ProcessesPolyestersSurface PropertiesUltraviolet RaysZinc Oxide

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22967047

Citation

Therias, Sandrine, et al. "Photochemical Behavior of polylactide/ZnO Nanocomposite Films." Biomacromolecules, vol. 13, no. 10, 2012, pp. 3283-91.
Therias S, Larché JF, Bussière PO, et al. Photochemical behavior of polylactide/ZnO nanocomposite films. Biomacromolecules. 2012;13(10):3283-91.
Therias, S., Larché, J. F., Bussière, P. O., Gardette, J. L., Murariu, M., & Dubois, P. (2012). Photochemical behavior of polylactide/ZnO nanocomposite films. Biomacromolecules, 13(10), 3283-91. https://doi.org/10.1021/bm301071w
Therias S, et al. Photochemical Behavior of polylactide/ZnO Nanocomposite Films. Biomacromolecules. 2012 Oct 8;13(10):3283-91. PubMed PMID: 22967047.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photochemical behavior of polylactide/ZnO nanocomposite films. AU - Therias,Sandrine, AU - Larché,Jean-François, AU - Bussière,Pierre-Olivier, AU - Gardette,Jean-Luc, AU - Murariu,Marius, AU - Dubois,Philippe, Y1 - 2012/09/27/ PY - 2012/9/13/entrez PY - 2012/9/13/pubmed PY - 2013/3/15/medline SP - 3283 EP - 91 JF - Biomacromolecules JO - Biomacromolecules VL - 13 IS - 10 N2 - This study reports the effect of light on PLA/ZnO nanocomposites films produced by melt-extrusion. The attention focused on the discrimination between the photocatalytic degradation of PLA provoked by ZnO and the UV screening effect of the ZnO nanoparticles. The chemical modifications of PLA induced by UV light irradiation were analyzed using infrared spectroscopy and completed through the analysis of the low-molecular-weight photoproducts using IC and SPME and the characterization of chain scissions with SEC. A comprehensive mechanism for the photooxidation of PLA was then proposed. The results indicated that the photocatalytic activity of ZnO nanoparticles induces the oxidation of PLA. Because ZnO limits the penetration of light inside the samples, this effect mainly concerns the first micrometers at the surface of the exposed samples. Cross-sectional analysis using micro-IR and ATR-IR spectroscopies was performed to highlight the degradation profile in the PLA/ZnO nanocomposites. SN - 1526-4602 UR - https://www.unboundmedicine.com/medline/citation/22967047/Photochemical_behavior_of_polylactide/ZnO_nanocomposite_films_ L2 - https://doi.org/10.1021/bm301071w DB - PRIME DP - Unbound Medicine ER -