Effects of reactive gas on shear and fracture behaviors of plasma-treated polyethylene/steel joints

Lee, Jihoon; Rhee, Kyong Yop; Lee, Joong Hee

doi:10.1016/j.apsusc.2009.08.076

Cited by 12 publications

(17 citation statements)

References 30 publications

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“…After plasma treatment, the oxygen content abruptly increased to about 30% for surface treatment and about 20% for pellet treatment. Similarly, the nitrogen content increased largely (4.6–6.7%) for surface treatment samples where the pellet treatment samples showed a significant increase in nitrogen content to 2% at 15 s treatment time but not at other longer treatment times (about 0.4%).This concentration is comparable with another experiment by Lee et al ., where they found that the nitrogen concentration increased from 0% to 2.3% after 5 min of nitrogen plasma onto PE surface.The chemical change on surface is thus pronounced in surface treatement samples rather than the pellet treatment samples. Moreover, increasing treatment time results in more chemical changes on surface for surface treatment samples but rather opposite for the pellet treatment samples where increasing treatment time rather decreases the chemical change on surface.…”

Section: Resultssupporting

confidence: 81%

“…Plasma treatment is one of the techniques used to enhance wettability and adhesion of nonpolar polymers. It also offers a more environmental friendly path to convert hydrophobic surfaces to hydrophilic surfaces than chemical methods; hence, wettability and good adhesion of nonpolar polymers are developed . Atmospheric plasma for surface treatment has been available industrially for labeling or painting of PE objects.…”

Section: Introductionmentioning

confidence: 99%

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Surface and bulk properties improvement of HDPE by a batch plasma treatment

Meemusaw

Magaraphan

2015

J of Applied Polymer Sci

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High-density polyethylene (HDPE) pellets were modified via atmospheric plasma treatment using nitrogen flushing. The new application of plasma treatment was introduced in this work, namely a batch treatment on plastic pellets just prior to its feeding to the extrusion process in comparison with the conventional surface treatment of the plastic sheet. The effect of treatment time (15-120 s) on wettability, chemical, thermal, and mechanical properties of the modified HDPE were investigated and compared with the typical surface-treated HDPE and untreated HDPE. The pellet treatment distributed well the hydrophilicity groups so that both surface and bulk properties were improved. It showed an enhancement of wettability similar to surface treatment at short treatment time (15 s). Attenuated total reflection-Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy revealed the presence of new chemical groups (nitrogen and oxygen up to 5 and 42 at %, respectively). In addition, crosslinked structure was also disclosed by solvent extraction (gel content of 3.5-5.5 wt % increased with treatment time) and significantly affected to decrease the crystallinity from 76% in the untreated sample to 63%. The decomposition process of the pellet treatment samples was delayed. Lastly, pellet treatment yielded advantages in remaining hydrophilicity during aging and improving mechanical properties. V C 2015Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43011.

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Section: Resultssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Surface and bulk properties improvement of HDPE by a batch plasma treatment

Meemusaw

Magaraphan

2015

J of Applied Polymer Sci

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“…O presente estudo avaliou o efeito do plasma de oxigênio na superfície dentinária, uma vez que este tratamento poderia levar a um aumento na rugosidade desta superfície e a criação de grupamentos funcionais 13,[16][17][18] , que poderiam neutralizar o efeito deletério do oxigênio nascente gerado pelo hipoclorito de sódio. No entanto, durante a aplicação do plasma, houve redeposição dos componentes removidos sobre os túbulos dentinários.…”

Section: Discussionunclassified

“…O plasma de oxigênio tem sido proposto em diferentes campos da ciência dos materiais, uma vez que permite uma melhora nos níveis de adesão pelo aumento da área superficial, dado pelo aumento da rugosidade 15,16 . Além disso, o uso deste plasma permite a criação de grupamentos funcionais, aumentando a hidrofilidade de superfícies 13,17 .…”

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Efeito do plasma de oxigênio na dentina previamente exposta ao NaOCl

Prado

Roizenblit

Pacheco

et al. 2016

Rev. odontol. UNESP

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ResumoIntrodução: O tratamento de plasma é uma tecnologia eficaz que pode manter as propriedades internas dos materiais inalteradas após o tratamento, modificando apenas a superfície. Objetivo: Avaliar o efeito do plasma de oxigênio na dentina previamente exposta ao NaOCl 6%. Material e método: Foram utilizados 60 incisivos bovinos. A coroa foi removida, a raiz foi dividida e as faces planificadas, totalizando 120 segmentos referentes ao terço cervical. As amostras foram divididas em dois grupos: controle (imersa em NaOCl 6%, lavada com água destilada, seca, imersa em EDTA 17%, lavada e seca) e plasma de oxigênio (após tratamento descrito no grupo controle, plasma de oxigênio foi aplicado por 30 s). As amostras foram avaliadas qualitativamente em relação à topografia por microscopia eletrônica de varredura, utilizando-se microfotografias com ampliação de 1.000×. O goniômetro Ramé-hart foi utilizado para a mensuração do ângulo de contato entre as superfícies e as seguintes soluções foram utilizadas: água, etilenoglicol e di-iodometano. Em seguida, a energia de superfície, representada pelas componentes polar e dispersiva, foi calculada. Avaliou-se também o escoamento dos cimentos Pulp Canal Sealer EWT (PCS) e Real Sal SE (RS) na superfície dentinária. Os dados foram analisados estatisticamente utilizando os testes Kruskal-Wallis e Mann-Whitney U (p<0,05). Resultado: O tratamento com plasma levou à formação de uma camada semelhante à smear layer na superfície dentinária. Este tratamento levou a um aumento da energia de superfície e da componente polar, favorecendo a hidrofilicidade da superfície. Entretanto, desfavoreceu o escoamento do cimento PCS e não influenciou no escoamento do cimento RS. Conclusão: O plasma de oxigênio ocasionou mudanças topográficas na superfície dentinária, favorecendo a hidrofilicidade desta. Contudo, não favoreceu o escoamento dos cimentos endodônticos na dentina.Descritores: Gases em plasma; hipoclorito de sódio; topografia; propriedades de superfície; molhabilidade. AbstractIntroduction: Plasma treatment is an effective technology since the internal properties of the material is kept unchanged after treatment, modifying only the surface. Objective: To evaluate the effect of oxygen plasma on dentin previously exposed to 6% NaOCl. Material and method: 60 bovine incisors were used. The crown was removed, the root splited and the faces planned amounting 120 segments related to the cervical third. The samples were divided into 2 groups, control (immersed in 6% NaOCl, washed with distilled water, dried, immersed in 17% EDTA, washed and dried) and oxygen plasma (after treatment described in the control group, oxygen plasma was applied for 30s). The samples were evaluated qualitatively in relation to topography by scanning electron microscopy using photomicrographs at 1000× of magnification. The Ramé-hart goniometer was used to measure the contact angle between the surfaces and the following solutions: water, ethyleneglycol, and diiodomethane. Then, surface energy, polar and dispersive compon...

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“…In order to improve the surface property, various methods have been used, e.g. plasma techniques [4,5], chemical surface etching [6], and casting chemical solution [7]. Environmentfriendly technologies for modifying the surface property of the materials are in great demand, instead of the complex and/or hazardous technologies with expensive and toxic reagents.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and surface state of plasma-treated high-density polyethylene elucidated by energy-tunable positron annihilation and water contact angle measurements

Chen

Zhi

Qiuming

et al. 2014

Proc. 2nd Japan-China Joint Workshop on Positron Science

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Positron gamma ray spectroscopy coupled with an energy-tunable positron beam was utilized to the study of the microstructure in polyethylene (PE) modified by the radio-frequency (RF) plasma. The energy dependence of the line-shape S parameter, a measure of the Doppler broadening of the positron radiation, confirmed that the change in the hydrophilic state of the PE surface after plasma modification was due to the altered chemical structure in the near-surface region. Moreover, only a region at a depth shallower than 700 nm was influenced by the plasma modification. The recovery in the surface hydrophobicity after plasma modification was observed through contact angle measurements. The variation of the contact angle of water can be fitted by a two-factor decay model, suggesting that the surface recovery is caused by the diffusion of two different groups.

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Effects of reactive gas on shear and fracture behaviors of plasma-treated polyethylene/steel joints

Cited by 12 publications

References 30 publications

Surface and bulk properties improvement of HDPE by a batch plasma treatment

Surface and bulk properties improvement of HDPE by a batch plasma treatment

Efeito do plasma de oxigênio na dentina previamente exposta ao NaOCl

Microstructure and surface state of plasma-treated high-density polyethylene elucidated by energy-tunable positron annihilation and water contact angle measurements

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