Plasma treatment of expanded PTFE offers a way to a biofunctionalization of its surface

Plasma-surface modification of biomaterials

“…However, an ideal surface coating process should allow for a normal healing process and naturalization. Baquey et al describe how the surface of poly(vinylidene difluoride) (PVDF) can be activated with swift heavy ions and investigate the use of rfGD on e-PTFE [205]. With regard to grafting of peptide, a multi-step approach can be carried out as shown schematically in Fig.…”

“…40. Cell attachment onto the modified surface of peptide and control sample as reflected by percent of absorbance with respect to the control [205].…”

Surface modification of non-woven fabric by DC pulsed plasma treatment and graft polymerization with acrylic acid

“…The maximum carboxyl group concentration is 1.17 mol/cm 2 after 40 s DPPT and 20% AA grafting. This density of surface-grafted AA is at least two times higher than those reported in the literature for PET films or PTFE membranes modified by radio frequency (RF) plasma under argon and/or oxygen atmosphere, which ranged from 0.3 to 0.56 mol/cm 2 [4,22,23]. Introducing more carboxyl groups onto NWF would facilitate its future biomedical applications after conjugating a biomimetic ligand.…”

“…There has been extensive research on the development of surface treatment processes for biomaterials in order to improve their cell adhesion property in recent years [2][3][4]. The importance of surface hydrophilicity on the interactions of biological species with substrates points out that wettability is one of the most important parameters when materials are designed for biomedical applications.…”

The allylamine grafting on the plasma pre-treated polyester nonwoven fabric: Preparation, characterization and utilization

“…Moreover, the amine (-NH2) groups are very important for chemical reactions with proteins or surface interactions with cells [1]. The synthetic biomaterials, such as poly(tetrafluoroethylene), modified by NH2 were used for peptide immobilization [23]. Some surface modifications experiments are only focused on the plasma surface modification without following physical-chemical treatment and these plasma pretreated surfaces are directly used for biochemical reaction (PEGylation) [1], molecular biology application [24,25] or biosensors (thin metal layers on PET [26]).…”