Analysis of Polymeric Components in Particulate Matter Using Pyrolysis-Gas Chromatography/Mass Spectrometry

Chae, Eunji; Choi, Sung‐Seen

doi:10.3390/polym14153122

Cited by 8 publications

(3 citation statements)

References 43 publications

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“…As discussed above, the isoprene/dipentene ratio increases as the wear particle size decrease. Some TWPs are in the air as PM, and TWP content in PM is generally quantified using the pyrolysis technique [ 5 , 60 , 61 , 62 , 63 ]. However, it is hard to practically prepare the reference rubber samples for building a calibration curve as small as PM.…”

Section: Resultsmentioning

confidence: 99%

Variation in Abundance Ratio of Isoprene and Dipentene Produced from Wear Particles Composed of Natural Rubber by Pyrolysis Depending on the Particle Size and Thermal Aging

Jung

Choi

2023

Polymers

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Tire wear particles (TWPs) are generated by friction between the road and the tire. TWPs are one of the major microplastics found in environmental samples, such as road dust, particulate matter (PM), and sediment. TWP contents in environmental samples are generally analyzed using the pyrolysis technique. Tire tread compounds of heavy vehicles are usually composed of natural rubber (NR). Isoprene and dipentene are the principal pyrolysis products of NR, and dipentene is employed as the key marker for the determination of the TWP contents. In this study, an NR abrasion specimen was thermally aged, and an abrasion test was performed to obtain the wear particles. The influence of the wear particle size and thermal aging on the pyrolysis behavior of NR was investigated. The isoprene/dipentene ratio exponentially increased as the wear particle size decreased, and it was also increased by the thermal aging of the abrasion specimen. The increased isoprene/dipentene ratio by thermal aging was explained by increasing the crosslink density. Using the relationship between the wear particle size and the isoprene/dipentene ratio, it is possible to estimate the isoprene/dipentene ratio for very small TWP such as PM. The experimental results concluded that the wear particle size and thermal aging affect the formation of the key pyrogenic products, and the influencing factors should be considered for the quantification of TWP contents in the environmental samples.

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Section: Resultsmentioning

confidence: 99%

Variation in Abundance Ratio of Isoprene and Dipentene Produced from Wear Particles Composed of Natural Rubber by Pyrolysis Depending on the Particle Size and Thermal Aging

Jung

Choi

2023

Polymers

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“…Hence, there was no PE in the PM 2.5 samples. 1-Alkenes may be pyrolysis products of plant waxes [ 48 ]. In general, plant epicuticular wax is present in the surface layer of bark and leaf [ 49 , 50 ].…”

Section: Resultsmentioning

confidence: 99%

Comparison of polymeric components and tire wear particle contents in particulate matter collected at bus stop and college campus

Chae

Choi

2023

Heliyon

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“…The primary air pollutant is particulate matter (PM) with an aerodynamic diameter of < 2.5 μm, which is referred to as PM2.5. PM is an airborne complex of particulates, both organic and inorganic, that are generated from the operation of motor vehicles, boilers, incinerators, ships, and aircraft 7 .…”

Section: Introductionmentioning

confidence: 99%

The stress-responsive cytotoxic effect of diesel exhaust particles on lymphatic endothelial cells

Sakurai,

Oba,

Honda

et al. 2024

Sci Rep

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Diesel exhaust particles (DEPs) are very small (typically < 0.2 μm) fragments that have become major air pollutants. DEPs are comprised of a carbonaceous core surrounded by organic compounds such as polycyclic aromatic hydrocarbons (PAHs) and nitro-PAHs. Inhaled DEPs reach the deepest sites in the respiratory system where they could induce respiratory/cardiovascular dysfunction. Additionally, a previous study has revealed that a portion of inhaled DEPs often activate immune cells and subsequently induce somatic inflammation. Moreover, DEPs are known to localize in lymph nodes. Therefore, in this study we explored the effect of DEPs on the lymphatic endothelial cells (LECs) that are a constituent of the walls of lymph nodes. DEP exposure induced cell death in a reactive oxygen species (ROS)-dependent manner. Following exposure to DEPs, next-generation sequence (NGS) analysis identified an upregulation of the integrated stress response (ISR) pathway and cell death cascades. Both the soluble and insoluble components of DEPs generated intracellular ROS. Three-dimensional Raman imaging revealed that DEPs are taken up by LECs, which suggests internalized DEP cores produce ROS, as well as soluble DEP components. However, significant cell death pathways such as apoptosis, necroptosis, ferroptosis, pyroptosis, and parthanatos seem unlikely to be involved in DEP-induced cell death in LECs. This study clarifies how DEPs invading the body might affect the lymphatic system through the induction of cell death in LECs.

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Analysis of Polymeric Components in Particulate Matter Using Pyrolysis-Gas Chromatography/Mass Spectrometry

Cited by 8 publications

References 43 publications

Variation in Abundance Ratio of Isoprene and Dipentene Produced from Wear Particles Composed of Natural Rubber by Pyrolysis Depending on the Particle Size and Thermal Aging

Variation in Abundance Ratio of Isoprene and Dipentene Produced from Wear Particles Composed of Natural Rubber by Pyrolysis Depending on the Particle Size and Thermal Aging

Comparison of polymeric components and tire wear particle contents in particulate matter collected at bus stop and college campus

The stress-responsive cytotoxic effect of diesel exhaust particles on lymphatic endothelial cells

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