Superhydrophobic polypropylene sorbent derived from discarded face masks: A highly efficient adsorbent for oil spill sorbent

Park, Se Jin; Kim, Yoon-Ho; Lee, Wonho; Nam, Chang Woo

doi:10.1016/j.chemosphere.2022.135186

Cited by 21 publications

(8 citation statements)

References 50 publications

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“…Thus, the PP-MAF-6 has the potential for large-scale preparation. Park et al ( 2022 ) found that the surface of the mask could also be modified by organic solvents, including n -hexane, n -heptane, and n -decane. The swollen macromolecular recrystallization formed a submicron protrusion on the surface of the mask after immersion (Zhu et al 2015 ).…”

Section: Solvent-based Technologymentioning

confidence: 99%

Disposal and resource utilization of waste masks: a review

Cui

Zhang

et al. 2023

Environ Sci Pollut Res

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Waste masks pose a serious threat to the environment, including marine plastic pollution and soil pollution risks caused by landfills since the outbreak of COVID-19. Currently, numerous effective methods regarding disposal and resource utilization of waste masks have been reported, containing physical, thermochemical, and solvent-based technologies. As for physical technologies, the mechanical properties of the mask-based materials could be enhanced and the conductivity or antibacterial activity was endowed by adding natural fibers or inorganic nanoparticles. Regarding thermochemical technologies, catalytic pyrolysis could yield considerable hydrogen, which is an eco-friendly resource, and would mitigate the energy crisis. Noticeably, the solvent-based technology, as a more convenient and efficient method, was also considered in this paper. In this way, soaking the mask directly in a specific chemical reagent changes the original structure of polypropylene and obtains multi-functional materials. The solvent-based technology is promising in the future with the researches of sustainable and universally applicable reagents. This review could provide guidance for utilizing resources of waste masks and address the issues of plastic pollution.

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Section: Solvent-based Technologymentioning

confidence: 99%

Disposal and resource utilization of waste masks: a review

Cui

Zhang

et al. 2023

Environ Sci Pollut Res

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“…11a and Table 4(1)), 50 or treatment with heptane (Table 4(5)). 315 Upcycled PP waste can be used for water purification as well as for selective gas capture from various gas mixtures. Wang et al reported the separation of propene and propane using ZIF-8 MOFs immobilised on PP membranes.…”

Section: Overview Of the Functional Upcycling Strategy For Different ...mentioning

confidence: 99%

“…326,327 Despite the simplicity and convenience of noncovalent approaches, the leakage of active components to the surrounding media limits their widespread application, which can be resolved via covalent modification. Thus, the sulfonation of PP in concentrated sulfuric acid has been implemented to improve [307][308][309] (c) heteroradicals functionalisation; 167,310 (d) sulfonation; 311 (e) grafting under physical treatment; 312,313 (f) oxidation; 42,314,315 (g) grafting of C-centered radicals; 316 and (h) diazirine modification through carbene intermediate. 317 This journal is © The Royal Society of Chemistry 2023 their thermal, 328,329 adsorption performance 330 or electrochemical properties 311 (Fig.…”

Section: Polypropylene (Pp)mentioning

confidence: 99%

“Functional upcycling” of polymer waste towards the design of new materials

et al. 2023

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“…Other researchers melted the polymers and developed injection molded samples from the disposed-of mask (Crespo et al 2021 ). Few other researchers used the disposed-of masks for the oil sorption process after heptane treatment; however, no information was provided about their microfiber release behavior (Park et al 2022 ), whereas few other researchers evaluated the use of polypropylene from disposed face masks and nitrile glows using compression molding techniques (Varghese et al 2022 ). Similarly, other researchers tried the possibility of using the mask in construction material (Idrees et al 2022 ; Parija et al 2020 ), covering as a filtration membrane (Cavalcante et al 2022 ), floor tiles (Remic et al 2022 ), and also as composites (Jingfang et al 2022 ).…”

Section: Implication Of the Studymentioning

confidence: 99%

Recycling of disposable single-use face masks to mitigate microfiber pollution

Rathinamoorthy

Subramanian

2023

Environ Sci Pollut Res

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The effectiveness of disposable masks in mitigating the transmission of COVID-19 infection increased the consumption of masks. The cheaper cost and easy accessibility resulted in massive consumption and disposal of non-woven masks. The improper disposal of mask emits microfiber into the environment upon weathering. This research mechanically recycled the disposed-of masks and developed fabric from reclaimed polypropylene (rPP) fibers. Obtained rPP fibers were blended with cotton in different proportions (50/50, 60/40, 70/30 cotton/rPP) to produce rotor-spun yarns and evaluated for their performance. The results of the analysis revealed that the developed blended yarns have enough strength; however, they are inferior to the 100% virgin cotton yarns. Based on its suitability, knitted fabrics were developed from 60/40 cotton/rPP yarn. Along with the physical properties, the microfiber release behavior of the developed fabric was analyzed at its different phases of the lifecycle (wearing, washing, degradation at disposal). The microfiber release was compared with the release characteristics of disposable masks. The results showed that recycled fabrics could release 2.32 microfiber/sq. cm during wearing, 4.91 microfiber/sq. cm in laundry, and 15.50 microfiber/sq. cm at the end-of-life disposal by weathering. In contrast, the mask can release 79.43, 96.07, and 223.66 microfiber/sq. cm, respectively, for use, immediate disposal, and long-term disposal by weathering. Approximately, an 83.17% reduction in the microfiber release was reported when the masks were recycled into fabrics. The compact structure of fabric where the fibers are made into yarn resulted in lesser fiber release. Mechanical recycling of disposable masks is simple, less energy-intensive, less expensive, and can be quickly adopted. However, a 100% elimination of microfiber release was not possible in this method due to the inherent nature of the textiles.

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Superhydrophobic polypropylene sorbent derived from discarded face masks: A highly efficient adsorbent for oil spill sorbent

Cited by 21 publications

References 50 publications

Disposal and resource utilization of waste masks: a review

Disposal and resource utilization of waste masks: a review

“Functional upcycling” of polymer waste towards the design of new materials

Recycling of disposable single-use face masks to mitigate microfiber pollution

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