Coating of Anionic Surfactants onto Poly(ethylene) Surfaces Studied with X-ray Photoelectron Spectroscopy

Lens, J.P.; Terlingen, J.G.A.; Engbers, G.H.M.; Feijén, Jan

doi:10.1021/la971025n

Cited by 15 publications

(14 citation statements)

References 30 publications

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“…56 First, a surfactant is coated on the surface to be modified and then it is exposed to an inert gas plasma. During the plasma exposure, crosslinking between the surfactant and the polymer substrate may occur, thus covalently bonding part of the precoated surfactant to the lumenal surface of the tubing by the "CASING" method [43][44][45] (CASING-crosslinking by active species of inert gases).…”

Section: Coating and Immobilization Of Peo Surfactants Onto Pe Tubingmentioning

confidence: 99%

“…This was accomplished by introducing polar functional groups at the surface by means of plasma treatment. 56 The inside of the PE tubing was exposed to four one-second pulses of a uniform air plasma. The tubing was then removed from the reactor, and the PEO surfactant was injected into the PE tubing and kept in contact with the lumenal surface for 30 min at room temperature (RT).…”

Section: Coating and Immobilization Of Peo Surfactants Onto Pe Tubingmentioning

confidence: 99%

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Reduced adhesion of human blood platelets to polyethylene tubing by microplasma surface modification

Lauer

Shohet

Albrecht

et al. 2004

Journal of Applied Physics

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A hollow-cathode microplasma modified the lumenal surface of small-diameter polyethylene (PE) tubing. A microwave cavity diagnostic was used to measure the density of the microplasma. Plasma light output was observed with a monochromator at various positions along the PE tube to assess uniformity. Treatment effectiveness was evaluated by measuring the variation in capillary rise at various positions along the tubing. A correlation between the properties of the inner surface of the PE tubing and the emitted light intensity was found. A poly(ethylene oxide) surfactant was immobilized to the lumenal surface of the PE tubing with an argon microplasma discharge. To test hematocompatibility, an in vitro blood-flow loop circulated heparinized human blood through both a plasma-treated and -untreated PE tubes, simultaneously. After blood exposure, the tubes were examined with a scanning electron microscope to assess the density of adhering platelets along the length of the tubes. By modifying the plasma parameters, the uniformity of the microplasma treatment along the tubing can be optimized.

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Section: Coating and Immobilization Of Peo Surfactants Onto Pe Tubingmentioning

confidence: 99%

Section: Coating and Immobilization Of Peo Surfactants Onto Pe Tubingmentioning

confidence: 99%

Reduced adhesion of human blood platelets to polyethylene tubing by microplasma surface modification

Lauer

Shohet

Albrecht

et al. 2004

Journal of Applied Physics

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“…E-mail: cep@postech.ac.kr materials to yield valuable nished products [4,5]. Techniques such as chemical treatment [6,7], ame treatment [8,9], corona treatment [10,11], ion implantation [12,13], and plasma treatment [14][15][16][17][18][19][20][21][22] are unique in that they only affect the chemical and physical properties of the outermost surface layer without altering the bulk properties. Although polar functional groups can be introduced via these treatments, these groups tend to disappear gradually and eventually the effects of surface treatments are lost.…”

Section: Introductionmentioning

confidence: 99%

Retardation of the surface rearrangement of O2 plasma-treated LDPE by a two-step temperature control

Kim

Cho

et al. 2001

Journal of Adhesion Science and Technology

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2001) Retardation of the surface rearrangement of O2 plasma-treated LDPE by a two-step temperature Abstract-The effects of the specimen temperature of low-density polyethylene (LDPE) in O 2 plasma treatment were studied to enhance the amount of hydrophilic functional groups introduced and to reduce the aging effect. The specimen temperature was varied from 25 ± C to 100 ± C. The smallest water contact angle was obtained with the 45 ± C specimen and the largest amount of hydrophilic functional groups was introduced with the 100 ± C specimen, as determined by X-ray photoelectron spectroscopy (XPS). Therefore, a two-step plasma treatment with two different specimen temperatures, i.e. 100 ± C followed by 45 ± C, decreased the water contact angle and reduced the aging effect. It appears that the hydrophilic functional groups introduced were located at the specimen surface (about 0.5 nm) at low temperature and that the aging effect was reduced due to the hydrophilic functional groups formed inside (0.5-8 nm) at high specimen temperature. The aging rate and the diffusion coef cient were also estimated, depending on the specimen temperature, using the experimental aging data.

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“…The PI technique consists of a two-step process [43]. First, a surfactant is coated on the surface to be modified and then it is exposed to an inert gas plasma.…”

Section: Coating and Immobilization Of Peo Surfactants Onto Pe Tubingmentioning

confidence: 99%

“…This was accomplished by introducing polar functional groups at the surface by means of plasma treatment [43]. The inside of the PE tubing was exposed to four 1-s pulses of a uniform air-plasma.…”

Section: Coating and Immobilization Of Peo Surfactants Onto Pe Tubingmentioning

confidence: 99%

Control of uniformity of plasma-surface modification inside of small-diameter polyethylene tubing using microplasma diagnostics

Lauer¹,

Shohet²,

Albrecht³

et al.

The 31st IEEE International Conference on Plasma Science, 2004. ICOPS 2004. IEEE Conference Record - Abstracts.

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Abstract-A hollow-cathode microplasma was used to modify the lumenal surface of small-diameter polyethylene (PE). We make use of two microplasma diagnostics to monitor the plasma properties during the treatment process. A microwave cavity was used to measure the density of the microplasma. Emitted light from the microplasma was fed into a monochromator at various positions along the PE tube to assess uniformity of the microplasma. Effectiveness of plasma treatments were evaluated using the capillary-rise method at various positions along the tubing. We show a correlation between the properties of the inner surface of the PE tubing and the light emitted from the plasma. A Poly(ethylene oxide) (PEO) surfactant was immobilized to the lumenal surface of the PE tubing using the microplasma discharge. An in vitro blood-circulation loop was constructed to test the hematocompatibility of the PE tubes. After blood exposure, scanning electron microscope images were taken to assess the density of adhering platelets along the length of the tubes. The plasma-treated tubing showed fewer blood adherents than the untreated tubing. By suitably controlling the pressure drop along the tube, the uniformity of the microplasma treatment along the tubing can be optimized.

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Coating of Anionic Surfactants onto Poly(ethylene) Surfaces Studied with X-ray Photoelectron Spectroscopy

Cited by 15 publications

References 30 publications

Reduced adhesion of human blood platelets to polyethylene tubing by microplasma surface modification

Reduced adhesion of human blood platelets to polyethylene tubing by microplasma surface modification

Retardation of the surface rearrangement of O2 plasma-treated LDPE by a two-step temperature control

Control of uniformity of plasma-surface modification inside of small-diameter polyethylene tubing using microplasma diagnostics

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