Hydrophilization of Polyvinyl Chloride Surface by Ozonation

Kurose, Keisuke; Okuda, Tetsuji; Nakai, Satoshi; Tsai, Tsung-Yueh; Nishijima, Wataru; Okada, Minoru

doi:10.1142/s0218625x08011986

Cited by 20 publications

(10 citation statements)

References 14 publications

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“…The results obtained indicated that the RMS height slightly decreased from 4.421 to 4.184 nm and from 10.335 to 10.311 nm for rigid and fl exible PVCs respectively. 17 The fourier transform infrared spec- were also detected at 1210-1260 cm −1 as a single bond between O and H and at 1200-1275 cm −1 as an ether bond between C and O. The intensities of these hydrophilic groups increased as a result of ozonation in both types of PVC.…”

Section: Resultsmentioning

confidence: 93%

“…This could be due to the chloride groups on the surface of PVC being replaced with hydrophilic functional groups, e.g., hydroxyl groups and carboxyl groups. 14,17 Our earlier study also reported the physical surface changes caused by ozonation, as analyzed by atomic force microscopy (AFM). 17 The surface hydrophilicity may increase as a result of decreased surface roughness.…”

Section: Resultsmentioning

confidence: 99%

“…14,17 Our earlier study also reported the physical surface changes caused by ozonation, as analyzed by atomic force microscopy (AFM). 17 The surface hydrophilicity may increase as a result of decreased surface roughness. 18 The surface roughness is expressed as the root mean square (RMS) of the AFM height image.…”

Section: Resultsmentioning

confidence: 99%

“…14,17 Furthermore, X-ray photoelectron spectrometry (XPS) confi rmed that the number of hydrophilic groups on the PVC surface, i.e., hydroxylic acid, ketone, and carboxylic groups, increased as a result ozonation, whereas, that of vinyl chloride groups decreased. 17 We tried to separate both fl exible and rigid PVCs from PET, PC, and PMMA using samples from 5-mm tubes by froth fl otation based on the different hydrophilicity produced by ozonation. 14 Figure 3a shows the change of the fl oating-settling behaviors of PVCs as a result of froth fl oatation before and after 10 min of ozonation.…”

Section: Resultsmentioning

confidence: 99%

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Surface ozonation of polyvinyl chloride for its separation from waste plastic mixture by froth floatation

Reddy

Okuda

Kurose

et al. 2010

J Mater Cycles Waste Manag

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Selective surface modifi cation of polyvinyl chloride (PVC) by ozonation was evaluated to facilitate the separation of PVC from other heavy plastics with almost the same density as PVC, especially polyethylene terephthalate (PET), by the froth fl otation process. The optimum froth fl otation conditions were investigated, and it was found that at 40°C, 90% of PVC and PET plastics fl oated. The bubble size became larger and the area covered with bubbles on the plastic surface was reduced with increasing temperature. Optimum PVC separation was achieved with the fl otation solution at 40°C and mixing at 180-200 rpm, even for sheet samples 10 mm in size. Combined treatment by ozonation and froth fl otation is a simple, effective, and inexpensive method for PVC separation from waste plastics.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Surface ozonation of polyvinyl chloride for its separation from waste plastic mixture by froth floatation

Reddy

Okuda

Kurose

et al. 2010

J Mater Cycles Waste Manag

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“…La reacción química del ozono con el PVC es explicada por Kurose et al (2008). Estos autores afirman que los átomos de cloro presentes en las moléculas de cloruro de vinilo (PVC) son convertidos por la ozonización en ácido hidroxílico, cetona y grupos carboxílicos.…”

Section: Introduccionunclassified

Pérdida de Ozono en Líneas de Flujo Poliméricas: PVC y Silicona

et al. 2013

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ResumenEl objetivo del presente estudio fue evaluar la interacción entre el ozono y el material de la tubería usada para su transporte, usualmente polimérica, a fin de determinar las pérdidas de ozono durante el proceso. Para este propósito, una mezcla gaseosa de ozono-oxígeno se hizo fluir a través de dos tipos de tubería, PVC y silicona, desde el generador de ozono hasta el punto de recolección. La concentración de ozono en la mezcla gaseosa y el flujo volumétrico de la corriente gaseosa fueron variadas para cada experimento. El flujo másico de ozono fue medido en el punto de recolección, aplicando el método yodométrico por titulación indirecta. La pérdida de ozono fue observada en ambas tuberías. Estas pérdidas están asociadas a la reacción química entre el ozono y el material de la tubería, como también a la auto descomposición del ozono. Palabras clave: ozono, pérdida de ozono, flujo en tuberías, PVC, silicona, interacción ozono-polímeros AbstractThe aim of this present study was to evaluate the interaction between the ozone and the pipe material used for transporting it, usually of polymeric material, to then determine ozone loss during the process. For this purpose, a mixture of ozone-oxygen was transported through two types of pipes, PVC and silicone, from the ozone generator to the point of collection. The ozone concentration in the gas mixture and volumetric flow of the gas stream were varied for each experiment. The ozone mass flow was measured at the point of collection, applying the iodometric method by indirect titration. Ozone loss was observed in both pipes. These losses are associated with the chemical reaction between ozone and the pipe material, as well as to the ozone self-decomposition.

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Polymer Waste Management

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Hydrophilization of Polyvinyl Chloride Surface by Ozonation

Cited by 20 publications

References 14 publications

Surface ozonation of polyvinyl chloride for its separation from waste plastic mixture by froth floatation

Surface ozonation of polyvinyl chloride for its separation from waste plastic mixture by froth floatation

Pérdida de Ozono en Líneas de Flujo Poliméricas: PVC y Silicona

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