Journal
APPLIED SURFACE SCIENCE
Volume 255, Issue 15, Pages 6795-6801Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2009.02.074
Keywords
TiO2 nanoparticle; Poly(lactic acid); Graft; FTIR; XPS
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Funding
- National Science Fund for Distinguished Young Scholars [50525309]
- National Science Foundation of China [50703026]
- Program for New Century Excellent Talents in University [NCET-06-0791]
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Poly(lactic acid) (PLA)-grafted TiO2 particles were prepared by in situ melt polycondensation of lactic acid onto the surface of TiO2 nanoparticles. The resulting products were characterized by FTIR, XPS, TG-FTIR, XRD analysis and electron microscopy observation so as to have a better understanding of bonding between the graft polymer and nanoparticles. New characteristic peaks of Ti-carboxylic coordination bond, the changes in the relative intensities of the infrared absorption bands of graft polymer and the two decomposition stage of PLA-grafted TiO2 confirmed that PLA was grafted on the surface of TiO2 nanoparticles. By attachment of PLA, the PLA-grafted TiO2 samples exhibited much better dispersion and a slightly larger particle size than bare TiO2 particles. PLA-grafted TiO2 nanoparticles will find wide applications in biomedical and eco-friendly materials, especially as fillers in PLA matrix. (C) 2009 Elsevier B. V. All rights reserved.
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