The effect of working pressure on the chemical bond structure and hydrophobic properties of PET surface treated by N ion beams bombardment
✍ Scribed by Wanyu Ding; Dongying Ju; Weiping Chai
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 533 KB
- Volume
- 256
- Category
- Article
- ISSN
- 0169-4332
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✦ Synopsis
Polyethylene terephthalate (PET) surface was bombarded by N ion beams at room temperature. Varying the working pressure of the ion beams, PET surfaces with different composition and properties were obtained. Characterization by X-ray photoelectron spectrometry showed that only on film surface, ester bonds, especially C-O bonds, were broken and N element chemical bonded with C. The influence depth was less than 5 nm because of the lower ion energy (about 10 3 eV). Contact angle results revealed that with increasing the working pressure of ion beams, the contact angle of PET surface to pure water increased from 51 • to 130 • . With these results, one conclusion could be deduced that the hydrophilic and hydrophobic properties of PET surface could be influenced by N atom chemical bond with C, which in turn is controlled by the working pressure of N ion beams.