Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 231-241 |
| Number of pages | 11 |
| Journal | Applied Surface Science |
| Volume | 490 |
| Early online date | 8 Jun 2019 |
| DOIs | |
| Publication status | E-pub ahead of print - 8 Jun 2019 |
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Keywords
- Titanium dioxide
- Polytetrafluoroethylene
- Surface energy
- Antibacterial activity
- Corrosion
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Advanced titanium dioxide-polytetrafluorethylene (TiO2-PTFE) nanocomposite coatings on stainless steel surfaces with antibacterial and anti-corrosion properties. / Zhang, Shuai; Liang, Xinjin; Gadd, Geoffrey Michael; Zhao, Qi (Lead / Corresponding author).
In: Applied Surface Science, Vol. 490, 01.10.2019, p. 231-241.Research output: Contribution to journal › Article
TY - JOUR
T1 - Advanced titanium dioxide-polytetrafluorethylene (TiO2-PTFE) nanocomposite coatings on stainless steel surfaces with antibacterial and anti-corrosion properties
AU - Zhang, Shuai
AU - Liang, Xinjin
AU - Gadd, Geoffrey Michael
AU - Zhao, Qi
PY - 2019/6/8
Y1 - 2019/6/8
N2 - Bacterial infection and corrosion are two of the most common causes of the failure for the use of biomedical metallic implants. In this paper, we developed a facile two-step approach for synthesizing a TiO2-PTFE nanocomposite coating on stainless steel substrate with both antibacterial and anticorrosion properties by using a sol-gel dip coating technique. A sub-layer of bioinspired polydopamine (PDA) was first coated on the stainless steel substrate to improve the adhesion and reactivity, then TiO2-PTFE was uniformly co-deposited onto the PDA sub-layer. Both PTFE and TiO2 contents had a significant influence on the surface energy of the TiO2-PTFE coating. The coating with the total surface energy of 26 mJ/m2 exhibited minimal bacterial adhesion against both Gram-negative Escherichia coli WT F1693 and Gram-positive Staphylococcus aureus F1557, which was explained using the extended DLVO theory. Benefiting from the synergistic effect between TiO2 and PTFE, the TiO2-PTFE coating showed improved corrosion resistance in artificial body fluids compared with the sole TiO2 coating or PTFE coating. The TiO2-PTFE coating also demonstrated extraordinary biocompatibility with fibroblast cells in culture, making it a prospective strategy to overcome current challenges in the use of metallic implants.
AB - Bacterial infection and corrosion are two of the most common causes of the failure for the use of biomedical metallic implants. In this paper, we developed a facile two-step approach for synthesizing a TiO2-PTFE nanocomposite coating on stainless steel substrate with both antibacterial and anticorrosion properties by using a sol-gel dip coating technique. A sub-layer of bioinspired polydopamine (PDA) was first coated on the stainless steel substrate to improve the adhesion and reactivity, then TiO2-PTFE was uniformly co-deposited onto the PDA sub-layer. Both PTFE and TiO2 contents had a significant influence on the surface energy of the TiO2-PTFE coating. The coating with the total surface energy of 26 mJ/m2 exhibited minimal bacterial adhesion against both Gram-negative Escherichia coli WT F1693 and Gram-positive Staphylococcus aureus F1557, which was explained using the extended DLVO theory. Benefiting from the synergistic effect between TiO2 and PTFE, the TiO2-PTFE coating showed improved corrosion resistance in artificial body fluids compared with the sole TiO2 coating or PTFE coating. The TiO2-PTFE coating also demonstrated extraordinary biocompatibility with fibroblast cells in culture, making it a prospective strategy to overcome current challenges in the use of metallic implants.
KW - Titanium dioxide
KW - Polytetrafluoroethylene
KW - Surface energy
KW - Antibacterial activity
KW - Corrosion
U2 - 10.1016/j.apsusc.2019.06.070
DO - 10.1016/j.apsusc.2019.06.070
M3 - Article
VL - 490
SP - 231
EP - 241
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -