Surface Modification of Conventional Polymers by Depositing Plasma Polymers of Trimethylsilane and of Trimethylsilane + O2

Weikart, Christopher M.; Miyama, Masayo; Yasuda, H.

doi:10.1006/jcis.1998.5964

Cited by 55 publications

(38 citation statements)

References 18 publications

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“…12,15 The dynamic contact angles were determined for the advancing (immersion) and receding (emergence) phases of the cycles by using eq. (1) and extrapolating each force trend to the intercept (0 depth), where the buoyancy term is zero.…”

Section: Wilhelmy Balance Methodsmentioning

confidence: 99%

“…Previously published 12 illustrations of hydrophobic and hydrophilic sample plates being immersed in and emerging from the water showed changes in the meniscus during the advancing and receding cycles. The immersion and emergence speed of the samples was fixed at 5 mm/ min, low enough to minimize the dependence of dynamic contact angles on immersion velocity.…”

Section: Surface Contact Angle Measurementsmentioning

confidence: 97%

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Surface characterization of low‐temperature cascade arc plasma–treated low‐density polyethylene using contact angle measurements

Gilliam

2005

J of Applied Polymer Sci

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Low-density polyethylene (LDPE) was treated with a low-temperature cascade arc plasma torch (LTCAT) of argon with or without adding a reactive gas of oxygen or water vapor. The static sessile droplet method and the dynamic Wilhelmy balance method were employed to perform surface contact angle measurement in order to investigate and characterize the effects of LTCAT treatment on LDPE surfaces. These treatment effects included changes in surface wettability and surface stability and possible surface damage that would create low-molecular-weight oligomers on the treated surface. Experimental results indicated that the combination of static and dynamic surface contact angle measurements enabled a comprehensive investigation of these effects of plasma treatment on a polymer surface. Without the addition of a reactive gas, a 2-s argon LTCAT treatment of LDPE resulted in a stable hydrophilic surface (with a water contact angle of 40°) and little surface damage. The addition of oxygen into argon LTCAT produced a less stable LDPE surface and showed more surface damage. Adding H 2 O vapor into argon LTCAT produced an extremely hydrophilic surface (with a water contact angle Ͻ 20°) of LDPE but with pronounced surface damage. When compared with conventional radio frequency (13.56 MHz) plasmas, LTCAT treatment provides a much more rapid, effective, and efficient method of surface modification of LDPE.

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Section: Wilhelmy Balance Methodsmentioning

confidence: 99%

Section: Surface Contact Angle Measurementsmentioning

confidence: 97%

Surface characterization of low‐temperature cascade arc plasma–treated low‐density polyethylene using contact angle measurements

Gilliam

2005

J of Applied Polymer Sci

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“…Dielectric barrier discharges have been used to deposit siloxane coatings at AP. 5 -7 These papers have discussed the use of small molecule siloxanes as the precursors: trimethylsilane (TMS), TEOS, SiH 4 , HMDSO, and hexamethyldisilazane (HMDSN). Recent developments using AP glow discharge have enabled low molecular weight cyclic siloxane oligomers, octamethylcyclotetrasiloxane (OMCTS), and tetramethylcyclotetrasiloxane (TMCTS) to be deposited to achieve siloxane coatings with tunable chemistries.…”

Section: Introductionmentioning

confidence: 99%

A methodology for curve‐fitting of the XPS Si 2p core level from thin siloxane coatings

O'Hare¹,

Hynes²,

Alexander

2007

Surface & Interface Analysis

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Plasma-enhanced coating processes are recognised as a route to well-adhered, conformal coatings, and are often used as a means of modifying the surface properties of materials, while having a minimal effect on the bulk characteristics of the substrate. Here, a method for providing an understanding of the chemistry of siloxane coatings prepared by plasma liquid deposition in atmospheric pressure (AP) is described.An iterative Si 2p-C 1s method for curve-fitting the C 1s and Si 2p core levels of siloxane coatings thinner than the depth of analysis of XPS has been developed when the substrate is poly(ethylene terephthalate) (PET) film. In addition to the determination of unambiguous binding energy positions for four siloxy environments, this has allowed the elemental composition of the coating to be determined in isolation of the substrate.Application of the binding energies to the Si 2p core levels of industrially relevant materials where the composition is not known by any other means can now be carried out. This can be used to provide understanding of the relationship between coating chemistry and plasma parameters, which is essential in the development of novel processes such as AP plasma liquid deposition, and will result in the deposition of coatings with controlled properties.

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“…In spite of the long history of water contact-angle measurements on organic surfaces and polymers, e.g. studies like those of Erbil et al (1999), Yasuda et al (1994) and Miyama et al (1997), to cite just a very few examples among the vast number, there exist far fewer papers detailing water adsorption on any polymer surface (Akhremitchev et al, 1998;Bedrov et al, 1998;Bummer & Knutson, 1990;Cadzerna & Thomas, 1987;Carey & Ferguson, 1996;Carey et al, 2000;Chan et al, 1996;Chen et al, 1999;Erbil et al, 1999;Harder et al, 1998;Hawkridge et al, 2002;Levshin et al, 2001;Miyama et al, 1997;Ong et al, 1993;Parker et al, 1994;Pertsin & Grunze, 2000;Pike et al, 1996;Proost et al, 2000;Suzuki et al, 2002;Tingey & Andrade, 1991;Toselli et al, 2001;Wang et al, 1997Wang et al, , 2000Weikart et al, 1999;Yasuda, et al, 1991Yasuda, et al, , 1994Yasuda, et al, , 1995. There remains an absence of a detailed understanding of polymer surface adsorbate chemistry, commensurate with other areas of surface science.…”

Section: Introductionmentioning

confidence: 99%

The elimination of the influence of ambient environmental effects on the structure of `inert' polymers

et al. 2004

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The construction and use of a vacuum chamber suitable for conventional X-ray diffraction has revealed the in¯uence of the ambient environment, including moisture, on the bulk structure of very thin polymer ®lms. It is concluded that studies of thin ®lm organic systems, even those thought not to be perturbed by ambient water vapor and other contaminants, may bene®t from undertaking some studies in such small sample vacuum chambers.

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Surface Modification of Conventional Polymers by Depositing Plasma Polymers of Trimethylsilane and of Trimethylsilane + O2

Cited by 55 publications

References 18 publications

Surface characterization of low‐temperature cascade arc plasma–treated low‐density polyethylene using contact angle measurements

Surface characterization of low‐temperature cascade arc plasma–treated low‐density polyethylene using contact angle measurements

A methodology for curve‐fitting of the XPS Si 2p core level from thin siloxane coatings

The elimination of the influence of ambient environmental effects on the structure of `inert' polymers

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