Hydrophobic recovery of oxygen-plasma-treated polystyrene

Occhiello, E.; Morra, Marco; Cinquina, P.; Garbassi, F.

doi:10.1016/0032-3861(92)90088-e

Cited by 97 publications

(83 citation statements)

References 27 publications

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“…Alternatively, since the system always wants to lower its free energy, the chemisorbed polymeric chains can quickly fold back on themselves when exposed to ambient air. 64 Oil contact angle measurements in water are needed to determine if this loss in hydrophilicity is due to one of these two mechanisms, or simply due to physical desorption, as it is the case with the UV-ozone treatment. The drops were first dispensed both under and above untreated surfaces using an inverted and straight needle respectively.…”

Section: Resultsmentioning

confidence: 99%

Gas-Phase Surface Engineering of Polystyrene Beads Used to Challenge Automated Particle Inspection Systems

Labonté

Marion

Virgilio

2016

Ind. Eng. Chem. Res.

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Container challenge sets, used in the qualification and validation of automated visible particle inspection systems in the parenteral drug industry, are prepared by seeding a single standardized polystyrene-divinylbenzene (PS-DVB) bead inside the commercial product to mimic foreign particulates. Due to its low surface energy and wettability, the bead adheres to container walls, hindering its detection by the motion based inspection system. The aim of this research is to modify the surface properties of the bead in such a way that it repulses the inner walls and stays in suspension inside the liquid product. The surface treatment consists of a photoinduced chemical vapor deposition (PICVD) process using syngas and UVC light. Following 2 treatment, newly grafted C-OH, C-O-C, C=O and COOH functional groups on the bead's surface are observed by XPS and FTIR spectroscopy, leading to an increase in the surface energy from 31 ± 1 to 65 ± 2 mJ/m 2 , and a corresponding zeta potential decrease from -38 mV to -61 mV.Finally, treated 100 µm, 200 µm and 500 µm PS-DVB beads suspended in water exhibit higher dispersion stability over time than untreated beads. These results show the potential of syngas PICVD to provide an effective solution to the stability issue of containers challenge sets for the validation of automated particle inspection systems, enabling significant savings of time and money to the parenteral drug industry.

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Section: Resultsmentioning

confidence: 99%

Gas-Phase Surface Engineering of Polystyrene Beads Used to Challenge Automated Particle Inspection Systems

Labonté

Marion

Virgilio

2016

Ind. Eng. Chem. Res.

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“…[1][2][3][4] However, the surfaces obtained by simple plasma treatment have been shown to be most unstable with respect to both washing and aging. [5][6][7][8] As the other methods, covalent immobilization and grafting of hydrophilic polymer such as poly(ethylene glycol) (PEG) and dextran have been examined for reducing nonspecific protein adsorption onto hydrophobic polymer substrate. [9][10][11] On the other hand, surfaces covered with bioinert polymer such as PEG may not be enough for some application due to absence of functional groups for further modification.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Hydrophilic Polymer Brushes on Polystyrene Substrate by Plasma-based Surface Functionalization

Sasai

Komatsu

Kondo

et al. 2012

J. Photopol. Sci. Technol.

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“…During storage, the polymer will try to lower the introduced surface energy by reorienting its plasma treated polymer chains into the bulk of the surface. This dynamic process has been extensively studied and by applying the right storage conditions (low temperatures/ vacuum environment) the plasma treatment effect can be preserved for a relatively longer time [44][45][46][47][48][49].…”

Section: Plasma Treatment and Etchingmentioning

confidence: 99%

Non-thermal plasma assisted lithography for biomedical applications: an overview

Cools

Morent

2016

IJNT

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Plasma assisted surface patterning is becoming a well-established technique that introduces both alternating surface texture and chemistry on substrates for biomedical applications. This review consists of an overview on the developments in this field over the last 15 years. Special attention is given to the different kinds of chemistry that can be introduced and their effect on the surface-cell interaction, as well as their feasibility for possible applications in the field of regenerative medicine.

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Hydrophobic recovery of oxygen-plasma-treated polystyrene

Cited by 97 publications

References 27 publications

Gas-Phase Surface Engineering of Polystyrene Beads Used to Challenge Automated Particle Inspection Systems

Gas-Phase Surface Engineering of Polystyrene Beads Used to Challenge Automated Particle Inspection Systems

Fabrication of Hydrophilic Polymer Brushes on Polystyrene Substrate by Plasma-based Surface Functionalization

Non-thermal plasma assisted lithography for biomedical applications: an overview

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