Modification of polystyrene surface in aqueous solutions

Mielczarski, J.; Jeyachandran, Y.L.; Mielczarski, Ela; Rai, Beena

doi:10.1016/j.jcis.2011.05.068

Cited by 23 publications

(8 citation statements)

References 65 publications

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“…The absorption bands for polystyrene are as follows: 3026 cm -1 C-H band related to the deformation of the aromatic ring; 2928 and 2851 cm -1 bands related to the asymmetric and symmetric stretching vibrations of CH 2 , respectively; 1600 and 1493 cm -1 C-C bands corresponding to the stretching of the aromatic ring; 1445 cm -1 band related to the bending vibration of CH 2 ; 1069 and 1028 cm -1 C-H bending vibrations of the ring plane; and 760 and 698 cm -1 C-H bands that correspond to the deformation of the aromatic ring out of the plane [27][28][29][30] . No changes were observed in the polystyrene spectra after 90 days of exposure in the simulated soil.…”

Section: Resultsmentioning

confidence: 99%

Behavior in simulated soil of recycled expanded polystyrene/waste cotton composites

et al. 2013

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Composites consisting of waste cotton yarn (CF) from the textile industry and postconsumer expanded polystyrene (EPS) was followed during 90 days of exposure in simulated soil. The mechanical properties, morphologies and chemical natures of the composites were determined before and after exposure in simulated soil. The composites were made using a single-screw extrusion, a twin-screw extrusion and injection molding. The composites showed an increase of the mechanical properties nearly 50% in relation to the recycled expanded polystyrene (rEPS). After exposure in simulated soil the composites presented losses of mechanical properties. Evidence of the oxidation of the samples was demonstrated by the increase in the values of the carbonyl index after 30 days of exposure in simulated soil. Changes in the color of the surface of the sample were observed after 90 days of exposure and are due to the fungi and bacteria colonization on the surface.

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Section: Resultsmentioning

confidence: 99%

Behavior in simulated soil of recycled expanded polystyrene/waste cotton composites

et al. 2013

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“…The oldest processes are wet chemical techniques. [16][17][18][19][20] Polystyrene functionalization employing atomic oxygen treatments 17,21 is a well-documented example of such wet chemistry approaches. However, the complex downstream treatment of costly and sometimes hazardous solvents hinders the application of wet chemistry approaches on a larger scale.…”

Section: Introductionmentioning

confidence: 99%

“…Over time, many surface modification techniques have been explored to increase polystyrene’s wettability and surface energy for a wide variety of applications. The oldest processes are wet chemical techniques. − Polystyrene functionalization employing atomic oxygen treatments , is a well-documented example of such wet chemistry approaches. However, the complex downstream treatment of costly and sometimes hazardous solvents hinders the application of wet chemistry approaches on a larger scale.…”

Section: Introductionmentioning

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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“…Previous studies have reported that PS-NPs used here are hydrophobic [21,22] and have a spherical shape [13,21].…”

Section: Polystyrene Nanobeads (Ps-nps)mentioning

confidence: 96%

Polystyrene Nanoparticles Activate Erythrocyte Aggregation and Adhesion to Endothelial Cells

Barshtein

Livshits

Shvartsman

et al. 2015

Cell Biochem Biophys

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Nanoparticles (NPs) are drawing an increasing clinical interest because of their potential use as drug carriers. Recently, a new strategy for elevation of NPs in vivo circulation time has been proposed, specifically, utilizing red blood cells (RBCs) as a carrier for NPs, that are loaded with a drug, by interaction (in vitro) of human RBCs with NPs (RBCNP). This class of delivery set-up, combines advantages of natural RBCs and synthetic biomaterials. Previous studies demonstrated that NPs initiated hemolysis of RBC and activated cells aggregation. In the present study, we examined the effect of RBCNP on the aggregation of RBC and their adhesion to endothelial cells (EC). Red cells were treated with polystyrene NPs (PS-NP), and following their washing, were added to suspension of untreated cells at various concentrations. We observed that the PS-NP and RBCNP initiated the formation of red cells aggregates and markedly elevated RBC adhesion to EC. These effects were augmented with (a) increasing concentration of NPs or RBCNP, and (b) with decreasing NP size. This implies that RBCNP are cells with a stronger intercellular interaction, and may thereby induce the formation of large and strong aggregates with untreated RBC, as well as strong RBC/EC interaction.

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Modification of polystyrene surface in aqueous solutions

Cited by 23 publications

References 65 publications

Behavior in simulated soil of recycled expanded polystyrene/waste cotton composites

Behavior in simulated soil of recycled expanded polystyrene/waste cotton composites

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

Polystyrene Nanoparticles Activate Erythrocyte Aggregation and Adhesion to Endothelial Cells

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