Surface Characterization and Antibacterial Evaluation of Poly(Ethylene Terephthalate) Modified by Chitosan-Immobilization

2005 ◽  
Vol 288-289 ◽  
pp. 331-334 ◽  
Author(s):  
Peng Li ◽  
Jin Wang ◽  
W.C. Lu ◽  
H. Sun ◽  
Nan Huang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Bacterial Adhesion ◽  
Surface Characterization ◽  
Ethylene Terephthalate ◽  
Attenuated Total Reflection ◽  
Poly Ethylene Terephthalate ◽  
Modified Surface ◽  
Poly Ethylene ◽  
Pet Films

Biomedical PET films were modified by the approach of chitosan-surface-grafting. Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) revealed that chitosan molecules were successfully grafted on the PET surface. The bacterial adhesion on the modified surface was evaluated by bacteria plate counting in vitro and scanning electron microscopy (SEM). The results testified that chitosan did make the surface of PET become more antibacterial. The free energy of adhesion (∆Fadh) between the bacteria and the chitosan-immobilized surface of PET was calculated. The value of the ∆Fadh was positive, which suggests that the process of bacterial adhesion on the modified PET surface was not thermodynamically favorable, namely, not spontaneous.

Blood Compatibility of Chitosan Immobilized on Poly(Ethylene Terephthalate) Surface Modified by Plasma and Ultraviolet Grafting

2005 ◽  
Vol 288-289 ◽  
pp. 327-330 ◽  
Author(s):  
Jin Wang ◽  
P. Li ◽  
H. Sun ◽  
Ping Yang ◽  
Y.X. Leng ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ethylene Terephthalate ◽  
Blood Compatibility ◽  
Attenuated Total Reflection ◽  
Grafting Modification ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Surface Modified ◽  
Pet Films

We report a study involving chitosan chains immobilized on poly (ethylene terephthalate) (PET) films by plasma and ultraviolet (UV) grafting modification. The surface structure of the modified PET is determined by means of attenuated total reflection Fourier transform infraed spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The results show that the chains of chitosan are successfully grafted on the surface of PET. Platelet adhesion evaluation in vitro is conducted to examine the blood compatibility in vitro. Scanning electron microscopy (SEM) and optical microscopy reveal that the amounts of adhered, aggregated and morphologically changed platelets are reduced on the chitosan-immobilized PET films. The number of platelet adhered on the modified film is reduced by almost 48% compared to the amount of platelets on the untreated film. Our result thus shows that chitosan immobilized on the PET surface improves blood compatibility.

Surface Characterization and In Vitro Blood Compatibility of Poly(Ethylene Terephthalate) Immobilized with Hirudin

2005 ◽  
Vol 288-289 ◽  
pp. 421-424
Author(s):  
F. Li ◽  
Jin Wang ◽  
H. Sun ◽  
Nan Huang
Keyword(s):  
Free Energy ◽  
Photoelectron Spectroscopy ◽  
Surface Characterization ◽  
Ethylene Terephthalate ◽  
Blood Compatibility ◽  
Argon Plasma ◽  
Angle Measurement ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Poly(ethylene terephthalate) films were exposed under argon plasma glow discharge and induced polymerization of acrylic acid (AA) in order to introduce carboxylic acid group onto PET (PET-AA) assisting by ultroviolet radiation. Hirudin-immobilized PETs were prepared by the grafting of PET-AA, followed by chemical reaction with hirudin. The surface structure of the treated PET is determined by X-ray photoelectron spectroscopy (XPS). The wettability and surface free energy, interface free energy of the films is investigated by contact angle measurement. Platelet adhesion evaluatiion is conducted to examine the blood compatibility in vitro. Scanning electron microscopy (SEM) and optical microscopy reveal that the amounts of adhered, aggregated and morphologically changed platelets are reduced on hirudin-immobilized PET films.

Surface Modification of Poly(Ethylene Terephthalate) in Air Plasma

2019 ◽  
Vol 27 (1) ◽  
pp. 128-136
Author(s):  
Mioara Drobota ◽  
Alexandru Trandabat ◽  
Marius Pislaru
Keyword(s):  
Contact Angle ◽  
Room Temperature ◽  
Ethylene Terephthalate ◽  
Film Surface ◽  
Air Plasma ◽  
Poly Ethylene Terephthalate ◽  
Modified Surface ◽  
Poly Ethylene ◽  
Pet Films ◽  
Polyester Film

Abstract This paper reports the modification of a polyester film surface in air plasma at room temperature. In order to evaluate the efficiency of the plasma treatment, the modified surface of the PET films was characterized by contact angle and ATR-FTIR spectroscopy.

scholarly journals Chemical modification and characterization of poly(ethylene terephthalate) surfaces for collagen immobilization

2013 ◽  
Vol 11 (11) ◽  
pp. 1786-1798 ◽  
Author(s):  
Mioara Drobota ◽  
Zdenka Persin ◽  
Lidija Zemljic ◽  
Tamiselvan Mohan ◽  
Karin Stana-Kleinschek ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ethylene Terephthalate ◽  
Chemical Properties ◽  
Surface Films ◽  
Wetting Properties ◽  
Poly Ethylene Terephthalate ◽  
Total Reflexion ◽  
Poly Ethylene ◽  
Collagen Immobilization ◽  
Pet Films

AbstractThe functionalization of poly(ethylene terephthalate) (PET) surface films by reactions with multifunctional amines such as triethylenetetramine (TETA), and tetraethylenepentamine (TEPA) was investigated. For the functionalization of PET films surface we used a new way of treatment, a “sandwich model”. Physical-chemical properties of functionalized PET films were analysed. Qualitative and quantitative determination of the introduced amine groups were examined by means of Fourier Transform Infrared Attenuated Total Reflexion (FTIR — ATR), X-ray photoelectron spectroscopy (XPS), and potentiometric titration. Gained wetting properties were determined by using contact angle measurements and thoroughly analysed by acid-base approach. In addition, surface topography was investigated by atomic force microscopy (AFM). The amount of the introduced amino groups after TETA incorporation has been found to be two times higher as compared to TEPA. Wetting properties were significantly improved after aminolysis. Surface free energy was higher for PET — TETA treated film than that observed for PET — TEPA treated which is in accordance with titration results. The collagen immobilization onto PET treated films was evidenced by using AFM and subsequently by using XPS.

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