Aging of surface properties of ultra high modulus polyethylene fibers treated with He/O2 atmospheric pressure plasma jet

Ren, Yu; Wang, Chunxia; Qiu, Yiping

doi:10.1016/j.surfcoat.2007.09.043

Cited by 95 publications

(47 citation statements)

References 35 publications

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“…Interestingly, following ethylenediamine plasma treatment, there was a significant chemical modification as indicated by the high roughness. Studies have revealed that plasma surface treatment presents with an aging effect [56], Ye et al observed the aging effect after post-surface treatment with non-thermal plasma and reported that the improvement in bond strength disappeared when the fiber posts were exposed to air for 1 h or longer after being treated with plasma [57]. …”

Section: Surface Treatmentmentioning

confidence: 99%

Plasma in dentistry

Cha

Park

2014

Clinical Plasma Medicine

126

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This review describes the contemporary aspects of plasma application in dentistry. Previous studies on plasma applications were classified into two categories, surface treatment and direct applications, and were reviewed, respectively according to the approach. The current review discussed modification of dental implant surface, enhancing of adhesive qualities, enhancing of polymerization, surface coating and plasma cleaning under the topics of surface treatment. Microbicidal activities, decontamination, root canal disinfection and tooth bleaching were reviewed as direct applications with other miscellaneous ones. Non-thermal atmospheric pressure plasma was of particular focus since it is gaining considerable attention due to the possibility for its use in living tissues. Future perspectives have also been discussed briefly. Although it is still not popular among dentists, plasma has shown promises in several areas of dentistry and is now opening a new era of plasma dentistry.

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Section: Surface Treatmentmentioning

confidence: 99%

Plasma in dentistry

Cha

Park

2014

Clinical Plasma Medicine

126

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“…It is well known that at low mixture ratio of oxygen, reactions (6) and (7) as mentioned above predominate in the He/O 2 or Ar/O 2 plasma jet, and these reactions contribute to the increase in the intensity of atomic oxygen with O 2 mixing ratio increasing up to the specific O 2 mixing ratio in the He/O 2 plasma jet or Ar/O 2 plasma jet. While O 2 is an electronegative gas, which can easily attach itself to the electron with a further increase in O 2 mixing ratio, making a negatively charged oxygen ion [30], [33]- [36] as the following electron-attachment process: …”

Section: Estimation Of Oxygen Radical Densitymentioning

confidence: 99%

Comparative Study of the Surface Cleaning for Ar-/He-Based Plasma Jets at Atmospheric Pressure

Jia

Ren

Yang

et al. 2015

IEEE Trans. Plasma Sci.

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In this study, an atmospheric-pressure He/O 2 or Ar/O 2 plasma jet is generated by a specially designed equipment with two coaxial quartz tubes and double power electrodes to remove lubricants from the surfaces of metals. The experimental results indicate that the cleaning performance is much better in the Ar/O 2 plasma jet than in the He/O 2 plasma jet under the same input power and O 2 mixing ratio. It is found that more electron, more atomic oxygen, and more metastable Ar atoms generated in the Ar/O 2 plasma jet result in better cleaning performance. In the He/O 2 plasma jet or the Ar/O 2 plasma jet, there exists an optimum O 2 mixing ratio for a certain input power, at which the desirable cleaning performance can be received. And the highest removing rate is 1259.8 ng/s when the 2.1% O 2 in the Ar plasma jet at an input power of 6 W. It is considered that atomic oxygen can be generated most efficiently under this optimum O 2 mixing ratio.

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“…Treating composite preforms instead of fibers or yarns can be advantageous because yarns may be stored for long time before being woven into fabrics and then impregnated in a composite. Due to aging of the plasma treatment effect, by the time the yarns are consolidated in a composite, the plasma treatment effect could be significantly weakened [16,17]. Meanwhile, treating fabrics, especially net shaped preforms could minimize the application of the plasmas, saving energy and reducing cost [18,19].…”

Section: Introductionmentioning

confidence: 99%