Plasma surface modification of polyethylene

Lehocký, Marián; Drnovská, Hana; Lapčı́ková, Barbora; Barros‐Timmons, Ana; Trindade, Tito; Zembala, Maria; Lapčík, Ľubomír

doi:10.1016/s0927-7757(03)00242-5

Cited by 185 publications

(139 citation statements)

References 7 publications

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“…It is well-known that plasma treatment strongly modifies (increases) the surface energy of polymer materials [1][2][3][4]. The natural macroscopic measure of the surface energy is the apparent contact angle [30][31].…”

Section: Experimental Study Of the Interaction Of Cold Plasma With Pomentioning

confidence: 99%

Physical mechanisms of interaction of cold plasma with polymer surfaces

Bormashenko

Whyman

Multanen

et al. 2015

Journal of Colloid and Interface Science

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Physical mechanisms of the interaction of cold plasmas with organic surfaces are discussed. Trapping of plasma ions by the CH 2 groups of polymer surfaces resulting in their electrical charging is treated. Polyethylene surfaces were exposed to the cold radiofrequency air plasma for different intervals of time. The change in the wettability of these surfaces was registered. The experimentally established characteristic time scales of the interaction of cold plasma with polymer surfaces are inversely proportional to the concentration of ions. The phenomenological kinetic model of the electrical charging of polymer surfaces by plasmas is introduced and analyzed.

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Section: Experimental Study Of the Interaction Of Cold Plasma With Pomentioning

confidence: 99%

Physical mechanisms of interaction of cold plasma with polymer surfaces

Bormashenko

Whyman

Multanen

et al. 2015

Journal of Colloid and Interface Science

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“…Table 1 [3,10]. Similarly, the solid -surface energy (γ s ) is expressed in terms of its polar and dispersive components…”

Section: Methodsmentioning

confidence: 99%

“…In comparison with conventional joining methods (riveting, welding and screwing) bonding provides a new combination of options and it allows obtaining special shapes and properties which cannot be created by conventional methods of coupling [3]. Joining materials using adhesive joints offers several benefits, but also limiting factors if compared with using mechanical joints.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ionizing Beta Radiation on the Strength of Bonded Joints of Polycarbonate

Bednarik

Maňas

Staněk

et al. 2014

AMR

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Abstract. In this study there was found that ionizing beta radiation increased the strength of bonded joints and improved the adhesion properties of polycarbonate (PC). Generally, for the formation of quality bonded joint it is important to wet the adhesive bonding surface well. Wettability is characterized by the contact angle of wetting. The liquid has to have a lower surface tension than the solid in order to be able to wet the solid substance. The measurement results indicated that ionizing beta radiation was a very effective tool for the improvement of adhesive properties and increased the strength of bonded joints of polycarbonate. Bonded surfaces with ionizing beta radiation doses of 0, 33, 66, and 99 kGy were irradiated. The best results were achieved by irradiation at dose of 66 kGy by which the highest surface energy and the highest strength of bonded joints of PC were achieved. The strength of bonded joints after irradiation was increased up to 50 % compared to untreated material. A similar trend was observed even for contact angle of wetting and surface energy.

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“…The hydrophilicity decreases as antibacterial agents are coated onto the surface (samples 4-6), yet, it is well above than that of sample 1. The induced hydrophilicity upon multistep modifications is surmised to stem from the formation of hydrophilic groups on the surface in particular in the case of sample 3 [33][34][35]. To delve further into the surface physicochemical variations of the samples, a widely used theory, Lifshitz-van der Waals/acid-base (LW/AB) [36], has been employed to estimate free surface energy values whose outputs based on diiodomethane, ethylene glycol, and deionized water as wetting agents are given in Table 1.…”

Section: Surface Wettability Analysismentioning

confidence: 99%

An in vitro bacterial adhesion assessment of surface-modified medical-grade PVC

Asadinezhad

Novák

Lehocký

et al. 2010

Colloids and Surfaces B: Biointerfaces

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A B S T R A C TMedical-grade polyvinyl chloride was surface modified by a multistep physicochemical approach to improve bacterial adhesion prevention properties. This was fulfilled via surface activation by diffuse coplanar surface barrier discharge plasma followed by radical graft copolymerization of acrylic acid through surfaceinitiated pathway to render a structured high density brush. Three known antibacterial agents, bronopol, benzalkonium chloride, and chlorhexidine, were then individually coated onto functionalized surface to induce biological properties. Various modern surface probe techniques were employed to explore the effects of the modification steps. In vitro bacterial adhesion and biofilm formation assay was performed. Escherichia coli strain was found to be more susceptible to modifications rather than Staphylococcus aureus as up to 85% reduction in adherence degree of the former was observed upon treating with above antibacterial agents, while only chlorhexidine could retard the adhesion of the latter by 50%. Also, plasma treated and graft copolymerized samples were remarkably effective to diminish the adherence of E. coli.

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Plasma surface modification of polyethylene

Cited by 185 publications

References 7 publications

Physical mechanisms of interaction of cold plasma with polymer surfaces

Physical mechanisms of interaction of cold plasma with polymer surfaces

Effect of Ionizing Beta Radiation on the Strength of Bonded Joints of Polycarbonate

An in vitro bacterial adhesion assessment of surface-modified medical-grade PVC

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