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

Kim, B. K.; Kim, K. S.; Cho, K.; Park, C. E.

doi:10.1163/15685610152715791

Cited by 41 publications

(27 citation statements)

References 44 publications

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“…In all cases, an increase in the advancing contact angle was observed, which is from hydrophobic recovery due to the surface rearrangement of hydrophilic polymers via reorientation and migration. 22,23 The hydrophobic recovery was found to be larger for the film without rinsing (Figure 4, closed circles) compared with that rinsed by water (Figure 4, triangles and squares), indicating that the loss of LMWOM to the atmosphere and the surface arrangement occurred. During the storage period, the advancing angles on the PET film rinsed with water immediately after the treatment (Figure 4, closed triangles) were slightly larger than those rinsed by water immediately before the contact angle measurement (Figure 4, closed squares), which suggests that the LMWOM can suppress the surface rearrangement mentioned above.…”

Section: Resultsmentioning

confidence: 99%

“…22,23 Therefore, the water contact angles on the PET surfaces treated by two dry processes are determined as a function of the aging time by the Wilhelmy method. This technique is not only an ideal method for obtaining high-precision contact angles calculated from the wetting force but also enables one to obtain a thermodynamically significant Young contact angle at the threephase contact line by moving the three-phase contact line at a constant velocity.…”

Section: Introductionmentioning

confidence: 99%

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Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Gotoh

Yasukawa

Kobayashi

2011

Polym J

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Two dry processes, atmospheric pressure plasma (APP) exposure and 172 nm ultraviolet (UV) excimer light irradiation, were carried out to enhance the hydrophilic nature of poly(ethylene terephthalate) (PET) film. The wettability change in the PET film surface after the processes were carried out was recorded by the wetting force measurements employing the Wilhelmy method. After the dry processes, drastic decreases in the advancing and receding contact angles of water were observed, especially for the APP exposure. The advancing angle on the treated PET surface was found to increase by rinsing with water or aging in air, whereas the receding one remained almost the same. The hydrophobic recovery diminished more rapidly for the UV-treated film. Surface characterizations of the PET film were performed. We discuss the influence of the dry processes on the physicochemical properties of the PET surface.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Gotoh

Yasukawa

Kobayashi

2011

Polym J

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“…Examples of such technologies include plasma, chemical, corona, flame, and ion implantation treatments [6][7][8][9][10][11][12][13][14]. These techniques affect only the chemical and physical properties of the outermost surface layer with an effective skin layer depth depending on the type of treatment and treatment conditions, and thus, they do not alter the bulk properties [13][14][15]. As is well known, plasma treatment has become increasingly www.elsevier.com/locate/apsusc Applied Surface Science 253 (2007) [9489][9490][9491][9492][9493][9494][9495][9496][9497][9498][9499] important in the last 20 years and it is possible to treat even substrates with complex shapes.…”

Section: Introductionmentioning

confidence: 99%

“…The various high energy species present in the plasma induce the formation of free radicals in the polymeric chains and thus permits the formation of certain polar functional groups on the polymeric surface which enhance the surface adhesion. In addition, the treatment is fast, clean, environmentally safe, uniform and precisely controllable [6,13,[16][17][18][19][20][21][22][23][24]. On the other hand, clear disadvantages of the plasma treatment include the fact that it encompasses a complex process and that the adjustment of the plasma discharge parameters constitutes a complicated task [14,22].…”

Section: Introductionmentioning

confidence: 99%

Flame treatment of low-density polyethylene: Surface chemistry across the length scales

Song¹,

Gunst

Arlinghaus

et al. 2007

Applied Surface Science

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The relationship between surface chemistry and morphology of flame treated low-density polyethylene (LDPE) was studied by various characterization techniques across different length scales. The chemical composition of the surface was determined on the micrometer scale by Xray photoelectron spectroscopy (XPS) as well as with time of flight secondary ion mass spectrometry (ToF-SIMS), while surface wettability was obtained through contact angle (CA) measurements on the millimeter scale. The surface concentration of hydroxyl, carbonyl and carboxyl groups, as a function of the ''number'' of the flame treatment passes (which is proportional to the treatment time) was obtained. Moreover, a correlation was found with chemical composition and polarity, emphasizing the role of oxygen-containing functional groups introduced during the treatment. Carboxyl functional groups were specifically identified by fluorescent labeling and the results were compared with the ToF-SIMS data. In addition, atomic force microscopy (AFM) was used to evaluate changes in surface topography and roughness on the nanometer to micrometer length scales. After flame treatment, water-soluble low molecular weight oxidized materials (LMWOM), which were generated as products of oxidation and chain scission of the LDPE surface, agglomerated into small topographical mounds that were visible in the AFM micrographs. After rinsing the flame treated samples with water and ethanol, bead-like nodular surface structures were observed. The ionization state of flame treated LDPE surfaces was monitored by chemical force microscopy (CFM). The effective surface pK a values of carboxylic acid (-COOH) obtained by AFM were revealed by chemical force titration curves and the effective surface pK a values were found to be around 6. #

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“…It was observed that the water contact angles on the APP-treated fibers slightly increased during the storage in air until 1 week. This is called hydrophobic recovery, due to the surface rearrangement of hydrophilic polymers via reorientation and migration [45][46][47][48][49]. The contact angles on the UV-treated fibers after 1 week aging are also presented in Fig.…”

Section: Single Fiber Wettabilitymentioning

confidence: 99%

Textile Performance of Polyester, Nylon 6 and Acetate Fabrics Treated with Atmospheric Pressure Plasma Jet

et al. 2013

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In general, synthetic textiles have many advantages of high modulus and strength, stiffness, stretch, wrinkle and abrasion resistances, relatively low cost, convenient processability, tailorable performance and easy recycling [1,2]. On the other hand, they have low wettability because of inherently hydrophobicity, which leads to less wearing comfort, low color strength, build-up of electrostatic charge, the tendency to pilling and insufficient washability [2,3]. Because of these disadvantages, surface modification to enhance hydrophilicity has been carried out by conventional chemical modifications [4][5][6][7]. The chemical modification can improve textile-specific performance by altering its chemical structure due to a chemical reaction, such as esterification, grafting, and crosslinking. Therefore, large amounts of modifying agents and solvents are required, resulting in undesired high-cost drying and pollutanttreating steps [4,7]. As alternative environmentally friendly technology, dry gas-phase oxidation of synthetic fiber surfaces after processing has been recently attempted by ultraviolet light [8][9][10][11][12][13] and plasma [7,[14][15][16][17][18][19][20] technologies.Recently, we have carried out the surface oxidation of synthetic fibers by two dry processes in the atmosphere. Some synthetic textiles were treated by 172 nm ultraviolet (UV) excimer light irradiation [21]. As a result, the water absorbency for any fabric was enhanced because of the increase in single fiber wettability. Such a tendency was remarkable for polyester, which surface oxygen concentration and roughness much increased due to UV exposure compared with other synthetic fibers. The color strength after dyeing and the detergency by laundering were also improved after UV irradiation for the polyester fabric [22]. Moreover, we have applied atmospheric pressure plasma (APP) to polyester textile finishing. The APP jet device used has attracted significant attention, because they generate plasma plumes in open space, have no limitations on the sizes of the objects to be treated and can achieve continuous in-line material processing at high speed [23][24][25][26][27]. To obtain basic information on physicochemical properties of the treated surface, the PET film with geometric simplicity was chosen [28,29]. The increases in wettability and surface free energy were remarkable for the APP treatment in comparison with the UV treatment, which was not in contradiction with the results characterized by X-ray photoelectron spectroscopy. Using polyester fabric, it was confirmed that the APP jet treatment increased oxygen concentration and roughness Abstract: Three synthetic textiles, polyester, nylon 6 and acetate fabrics, were treated by atmospheric pressure plasma (APP) jet with nitrogen gas. From the contact angle measurements using a single fiber, the wettability and the base parameter of surface free energy of the three fibers were found to increase drastically after the APP treatment. X-ray photoelectron spectroscopy and atomic force micros...

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

Cited by 41 publications

References 44 publications

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Flame treatment of low-density polyethylene: Surface chemistry across the length scales

Textile Performance of Polyester, Nylon 6 and Acetate Fabrics Treated with Atmospheric Pressure Plasma Jet

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