A comparison of plasma and electron beam-sterilization of PU catheters

Mrad, O.; Saunier, Johanna; Chodur, C. Aymes; Rosilio, Véronique; Agnely, Florence; Aubert, P.; Vigneron, J.; Etchéberry, Arnaud; Yagoubi, Najet

doi:10.1016/j.radphyschem.2009.08.038

Cited by 41 publications

(27 citation statements)

References 41 publications

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“…In addition, they are broadly utilised for medical devices such as catheters and sutures [8,9]. Although many efforts have been made to improve these materials for biomedical applications, their biocompatibility is still a challenge.…”

Section: Introductionmentioning

confidence: 99%

Layer-by-layer assembly of thin organic films on PTFE activated by cold atmospheric plasma

et al. 2014

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An air diffuse coplanar surface barrier discharge is used to activate the surface of polytetrafluoroethylene (PTFE) samples, which are subsequently coated with polyvinylpyrrolidone (PVP) and tannic acid (TAN) single, bi-and multilayers, respectively, using the dipcoating method. The surfaces are characterized by X-ray Photoelectron Spectroscopy (XPS), Attenuated Total Reflection -Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Atomic Force Microscopy (AFM). The XPS measurements show that with plasma treatment the F/C atomic ratio in the PTFE surface decreases, due to the diminution of the concentration of CF 2 moieties, and also oxygen incorporation through formation of new C-O, C=O and O=C-O bonds can be observed. In the case of coated samples, the new bonds indicated by XPS show the bonding between the organic layer and the surface, and thus the stability of layers, while the gradual decrease of the concentration of F atoms with the number of deposited layers proves the creation of PVP/TAN bi-and multi-layers. According to the ATR-FTIR spectra, in the case of PVP/TAN multilayer hydrogen bonding develops between the PVP and TAN, which assures the stability of the multilayer. The AFM lateral friction measurements show that the macromolecular layers homogeneously coat the plasma treated PTFE surface.

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Section: Introductionmentioning

confidence: 99%

Layer-by-layer assembly of thin organic films on PTFE activated by cold atmospheric plasma

et al. 2014

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“…As shown in Figure , the starting thermal decomposition temperature of PU membrane occurred at about 260 °C and lasted until 440 °C. During this period, two successive decomposition stages were observed, which included the decomposition of hard segments and the polyether segments of PU . Although PU membrane possesses the good thermal stability, the thermal decomposition temperature of PU membrane with PA loading was reported to drop dramatically .…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of layer‐by‐layer self‐assembly membrane based on sulfonated polyetheretherketone and polyurethane for high‐temperature proton exchange membrane

Cheng

Che

2017

J. Polym. Sci. Part A: Polym. Chem.

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A concept of preparing high‐temperature proton exchange membranes with layer‐by‐layer (LBL) self‐assembly technique was proposed and the sulfonated polyetheretherketone (SPEEK) and polyurethane (PU) with 200 LBL deposition cycles denoting (SPEEK/PU)200 membrane was prepared in this research. Owing to the strong electrostatic interaction between  SO3− group in SPEEK and CN+ group in PU, (SPEEK/PU)200 membrane with LBL self‐assembly structure showed a favorable structural stability. The phosphoric acid (PA)‐doped (SPEEK/PU)200 membrane showed a higher proton conductivity relative to PA doped SPEEK/PU membrane by solution casting method (SPEEK/PU)200/40%PA membrane possessed a proton conductivity value of 2.90 × 10−2 S/cm at 150 °C under anhydrous conditions. The LBL self‐assembly structure provided a possibility to reduce the negative effect from polymer skeleton blocking charge carrier species even immobilizing protons. Moreover, the (SPEEK/PU)200 membrane presented the particularly noteworthy mechanical property even with PA doping. The tensile stress values at break were 72.8 and 24.1 MPa, respectively, for (SPEEK/PU)200 and (SPEEK/PU)200/40%PA membrane at room temperature, which were obviously higher than the reported values of 15.9 and 2.81 MPa for SPEEK/PU and SPEEK/PU/60%PA membrane. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 3446–3454

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“…A reduction in the contact angle was related to the surface degradation and/or oxidation (Scheme ), which formed a low‐molecular‐weight surfactant on the surface . The reduction of the contact angle may have been consistent with the increase in CO, OH, and NH 2 hydrophilic functionalities on the surface . These results suggest that γ irradiation enhanced the wetting capability of the polyurethane.…”

Section: Resultsmentioning

confidence: 99%

Effects of wide‐range γ‐irradiation doses on the structures and properties of 4,4′‐dicyclohexyl methane diisocyanate based poly(carbonate urethane)s

Zhang

Jiang

Zhao

et al. 2014

J of Applied Polymer Sci

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For medical applications, 4,4 0 -dicyclohexyl methane diisocyanate (HMDI)-based poly(carbonate urethane)s were synthesized from HMDI and 1,4-butanediol as hard segments and poly(carbonate diol) (number-average molecular weight 5 2000 g/mol) as soft segments. The effects of wide-range c irradiation on the samples were examined through a series of analytical techniques. Scanning electron microscopy revealed that c irradiation etched and roughened the surfaces of the irradiated samples. The gel content and crosslinking density measurements confirmed that crosslinking occurred along with degradation at all of the investigated irradiation doses and the degree of both crosslinking and degradation increased with increasing irradiation dose. Fourier transform infrared spectroscopy demonstrated that chain scission in the c-irradiated samples occurred at the carbonate and urethane bonds. The decreasing molecular weight and tensile strength indicated that the degradation increased with the c-irradiation dose. Differential scanning calorimetry and dynamic mechanical thermal analysis indicated that c irradiation had no significant effect on the phase-separation structures. There was a slight reduction in the contact angle. An evaluation of the cytotoxicity demonstrated the nontoxicity of the nonirradiated and irradiated polyurethanes.

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A comparison of plasma and electron beam-sterilization of PU catheters

Cited by 41 publications

References 41 publications

Layer-by-layer assembly of thin organic films on PTFE activated by cold atmospheric plasma

Layer-by-layer assembly of thin organic films on PTFE activated by cold atmospheric plasma

Preparation and characterization of layer‐by‐layer self‐assembly membrane based on sulfonated polyetheretherketone and polyurethane for high‐temperature proton exchange membrane

Effects of wide‐range γ‐irradiation doses on the structures and properties of 4,4′‐dicyclohexyl methane diisocyanate based poly(carbonate urethane)s

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