Modulation of structure, morphology and wettability of polytetrafluoroethylene surface by low energy ion beam irradiation

Fawzy, Y. H. A.; Bek, Alpan; Abdel-Hamid, H.M.; Eloker, M. M.

doi:10.1016/j.nimb.2013.02.004

Cited by 42 publications

(16 citation statements)

References 20 publications

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“…Figure clearly highlights this decrease. Similarly, Atta et al observed in their study on PTFE after irradiation by 3 keV argon ions the decrease in the absorption band of 2360 cm −1 (in our case, the same band is at wave number 2387 cm −1 in the pristine sample; this band is assigned to a combination of two modes associated with the CF 2 backbone). They mentioned that this decrease could be due to defluorination of polymeric films after irradiation.…”

Section: Resultssupporting

confidence: 85%

“…[74][75][76][77] The appearance of very strong absorption bands of C-F stretching vibrations in the region of 1350-1100 cm −1 reveals that 100-μm thick PTFE samples used for the study are nontransparent for the infrared radiation. Similarly, Atta et al 79 observed in their study on PTFE after irradiation by 3 keV argon ions the decrease in the absorption band of 2360 cm −1 (in our case, the same band is at wave number 2387 cm −1 in the pristine sample; this band is assigned to a combination of two modes associated with the CF 2 backbone 80 ). Absorption of a band at wave number 1883 cm −1 increased sharply in the spectrum of irradiated PTFE samples.…”

Section: Ftir Studiessupporting

confidence: 85%

“…Two bands at positions 2913 and 2850 cm −1 disappeared after irradiation. 79 Some new bands appeared at wave numbers 984 and 900 cm −1 in the spectrum of the irradiated sample at a fluence of 1 × 10 10 ions/cm 2 (see Fig. This band was identified with the acid fluoride group (-COF).…”

Section: Ftir Studiesmentioning

confidence: 97%

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Influence of High‐Energy Ion Irradiation on the Structural, Optical, and Chemical Properties of Polytetrafluoroethylene

Singh

Kumar

2014

Adv Polym Technol

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Polytetrafluoroethylene (PTFE) polymer samples were irradiated by 50 MeV Li 3+ ion beams to the fluences of 1 × 10 10 , 1 × 10 11 , and 1 × 10 12 ions/cm 2 . The structural, optical, and chemical properties were studied by X-ray diffraction (XRD), UV-visible (UV-vis) spectroscopy, and Fourier transform infrared (FTIR) spectroscopy, respectively. The XRD analyses showed amorphization of the polymer sample at fluences of 1 × 10 10 and 1 × 10 11 ions/cm 2 . Crystallite size (calculated by applying the Scherrer formula) decreased for irradiated samples at fluences of 1 × 10 10 and 1 × 10 11 ions/cm 2 . The other factors like microstrain (ε), dislocation density (δ), and distortion parameters (g) showed variations at these fluences. However, there was no change in the interchain separation (R) and interplanar distance (d) for all irradiated samples. UV-vis showed a shift of the absorption edge of irradiated samples towards the visible region. The band gap energy (E g ) was calculated using Tauc's relation, and its value decreased with an increase of ion fluence for all irradiated samples. The number of carbon atoms per conjugation length (N) increased for the irradiated samples. The FTIR results revealed the liberation of CF 2 groups and the appearance of some new bands after irradiation. C

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Section: Resultssupporting

confidence: 85%

Section: Ftir Studiessupporting

confidence: 85%

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Influence of High‐Energy Ion Irradiation on the Structural, Optical, and Chemical Properties of Polytetrafluoroethylene

Singh

Kumar

2014

Adv Polym Technol

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“…These changes are accompanied by the formation of free radicals, crosslinking, and chain scission. These alterations lead to changes in structural and dielectric properties of the irradiated polymers …”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of irradiated polymer/multiwalled carbon nanotube and its amino functionalized form

Atta

Lotfy

Abdeltwab

2018

J of Applied Polymer Sci

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The polymer/multiwalled carbon nanotube [poly(vinyl alcohol) (PVA)/carboxyethyl acrylate (CEA)]‐multiwalled carbon nanotube (MWCNT) and its amino functionalized (PVA/CEA)‐MWCNT‐NH2 nanocomposite samples were successfully synthesized by the chemical method in the form of films. The samples were irradiated with gamma‐ray doses of 50 and 100 kGy and with ion beam fluence of 2.5 × 1018 and 3.75 × 1018 ions cm−2. The prepared nanocomposite samples were characterized using X‐ray diffraction and thermogravimetric analysis. The X‐ray diffraction and thermogravimetric analysis confirm the existence of the chemical crosslinking occurred in the polymer compositions. The AC electrical conductivity, electrical modulus, dielectric constant, and dielectric loss in the frequency range 102–106 Hz are measured at room temperature. The electrical conductivity is increased with MWCNT doping, gamma‐irradiation, and by ion beam irradiation. A comprehensive analysis of the results revealed that dielectric properties are improved due to the induced physicochemical changes and conductive networks induced by ion beam irradiation. The behavioral effect of these embedded nanoparticles in a PVA matrix on the microstructural, dielectric, and electric properties is analyzed for possible device applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46647.

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“…This explains the low adhesion of non-ionic surfaces to substrate-dependent cells and indicates that surface hydrophilization can be used to improve the adhesive characteristics of a material. Thus, studies have & Roman A. Surmenev rsurmenev@gmail.com attempted to improve polymeric implant surface properties such as wettability and surface topography to improve clinical results [5,[10][11][12][13]. Several techniques have been employed to obtain polymer surfaces with tailored properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electron Beam Treatment in Air on Surface Properties of Ultra-High-Molecular-Weight Polyethylene

et al. 2016

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In this study, ultra-high-molecular-weight polyethylene (UHMWPE) was treated by an electron beam (EB) in air to obtain polar hydroxyl and carbonyl functional groups, which originated from oxidizing agents, to improve hydrophobicity and cell adhesion (NCTC clone L929). Sample characterization using Fourier transform-infrared spectroscopy revealed the presence of carbonyl oxidation products, whose intensity and surface roughness increased with increasing irradiation dose. The substitution of polar groups into the surface layers of the polymers resulted in a decreased water contact angle. The observed differences in the water contact angle of untreated polymers relative to that of the treated samples can be attributed not only to the differences in their respective molecular composition but also to their distinct roughness values. The treatment conditions affected the adhesion characteristics of fibroblasts. The untreated polymer and the surfaces treated at 10.7 kGy maintained the adhesion, spreading, and proliferation of fibroblasts. The hydrophilic polymer treated at 46.5 and 106.5 kGy maintained only the initial adhesion of fibroblasts. Thus, this study shows that EB treatment is a useful tool for modifying the surface properties of UHMWPE for particular biomedical applications. For example, the initially hydrophobic surface of UHMWPE can be made either hydrophilic or moderately hydrophobic by varying the surface treatment procedure using EB.

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Modulation of structure, morphology and wettability of polytetrafluoroethylene surface by low energy ion beam irradiation

Cited by 42 publications

References 20 publications

Influence of High‐Energy Ion Irradiation on the Structural, Optical, and Chemical Properties of Polytetrafluoroethylene

Influence of High‐Energy Ion Irradiation on the Structural, Optical, and Chemical Properties of Polytetrafluoroethylene

Dielectric properties of irradiated polymer/multiwalled carbon nanotube and its amino functionalized form

Effect of Electron Beam Treatment in Air on Surface Properties of Ultra-High-Molecular-Weight Polyethylene

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