Ozone (O3) treatment of polyethylene terephthalate (PET) in distilled water was performed in the presence and absence of calcium (Ca2+). PET was oxidized and thus carboxylic and hydroxyl functional groups were introduced on its surface after O3 treatment, regardless of the presence or absence of Ca2+. In the case of O3 treatment with Ca2+, PET surface was modified with Ca2+. Ca2+ immobilization was confirmed by X-ray photoelectron spectrometric analysis. Hydrophilicity was investigated by measuring contact angles (CA). CA of PET decreased significantly after ozonation. Surface topography of PET before and after ozone treatment was observed by scanning electron microscopy, and showed no morphological changes. In vitro studies showed enhanced rat bone marrow cell responses on the O3-treated PET surface. Ca2+-O3 oxidation at 37C for 6 h is expected to be an effective method to fabricate PET with good biocompatibility.
|Number of pages||8|
|Journal||Journal of Biomedical Materials Research - Part B Applied Biomaterials|
|Publication status||Published - May 1 2015|
All Science Journal Classification (ASJC) codes
- Biomedical Engineering