Improving the adhesion of poly(ethylene terephthalate) fibers to poly(hydroxyethyl methacrylate) hydrogels by ozone treatment: Surface characterization and pull-out tests

Polymer ◽  
2005 ◽  
Vol 46 (23) ◽  
pp. 9840-9850 ◽  
Author(s):  
Lino Ferreira ◽  
Marta B. Evangelista ◽  
Ma Cristina L. Martins ◽  
Pedro L. Granja ◽  
José L. Esteves ◽  
...  
Keyword(s):  
Surface Characterization ◽  
Ethylene Terephthalate ◽  
Ozone Treatment ◽  
Hydroxyethyl Methacrylate ◽  
Pull Out ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

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 characterization of plasma-modified poly(ethylene terephthalate) film surfaces

2004 ◽  
Vol 42 (20) ◽  
pp. 3727-3740 ◽  
Author(s):  
Norihiro Inagaki ◽  
Kazuo Narushim ◽  
Norio Tuchida ◽  
Kohji Miyazaki
Keyword(s):  
Surface Characterization ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

scholarly journals Yarrowia lipolytica Adhesion and Immobilization onto Residual Plastics

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 649 ◽  
Author(s):  
Alanna Botelho ◽  
Adrian Penha ◽  
Jully Fraga ◽  
Ana Barros-Timmons ◽  
Maria Alice Coelho ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Yarrowia Lipolytica ◽  
Surface Characterization ◽  
Ethylene Terephthalate ◽  
Hydrophobic Interactions ◽  
Protein Complexes ◽  
Ultrasound Waves ◽  
Cell Extracts ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Research in cell adhesion has important implications in various areas, such as food processing, medicine, environmental engineering, biotechnological processes. Cell surface characterization and immobilization of microorganisms on solid surfaces can be performed by promoting cell adhesion, in a relatively simple, inexpensive, and quick manner. The adhesion of Yarrowia lipolytica IMUFRJ 50682 to different surfaces, especially potential residual plastics (polystyrene, poly(ethylene terephthalate), and poly(tetrafluoroethylene)), and its use as an immobilized biocatalyst were tested. Y. lipolytica IMUFRJ 50682 presented high adhesion to different surfaces such as poly(tetrafluoroethylene) (Teflon), polystyrene, and glass, independent of pH, and low adhesion to poly(ethylene terephthalate) (PET). The adhesion of the cells to polystyrene was probably due to hydrophobic interactions involving proteins or protein complexes. The adhesion of the cells to Teflon might be the result not only of hydrophobic interactions but also of acid–basic forces. Additionally, the present work shows that Y. lipolytica cell extracts previously treated by ultrasound waves (cell debris) maintained their enzymatic activity (lipase) and could be attached to polystyrene and PET and used successfully as immobilized biocatalysts in hydrolysis reactions.

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