Properties of polyamide nanofibers treated by UV-A radiation

Kolská, Zdeňka; Polanský, Radek; Prosr, Pavel; Zemanová, Monika; Ryšánek, Petr; Slepička, Petr; Švorčı́k, Václav

doi:10.1016/j.matlet.2017.12.029

Cited by 17 publications

(21 citation statements)

References 13 publications

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“…The exposure of polymer surface to UV light leads to cleavage of original bonds in polymer chains and subsequent oxidation and creation of polar groups on the surface enable other interactions with different agents. [ 44,45 ] Perceptible decrease in the zeta potential is observed for PA6, PP, and PTFE, the most pronounced change is visible in the case of PP, indicating a decrease in surface polarity due to the creation of negatively charged oxygen groups (hydroxyl OH‐ and carboxyl COO‐ groups). [ 46 ] On PE the UV activation causes only mild increase in zeta potential indicating a small increase in amount of polar oxygen groups on surface.…”

Section: Resultsmentioning

confidence: 99%

Enhancing immobilization of iron oxide particles on various polymer surfaces

Lupínková¹,

Benkocká²,

Ryšánek³

et al. 2022

Polymer Engineering & Sci

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We report the approach of successful immobilization of iron oxide particles (IOPs) on UV‐activated surface of polymers. PA6 (polyamide 6), PTFE (polytetrafluoroethylene), UHMWPE (ultra‐high‐molecular‐weight polyethylene), and PP (polypropylene) foils were studied. The surface of polymers was firstly activated by UV radiation and subsequently grafted with IOPs. We have also investigated the effect of surface pre‐grafting with chitosan and triethanolamine on subsequent IOPs grafting. IOPs have been synthesized by co‐precipitation method of ferric and ferrous ions. The changes in surface properties of modified polymer foils before/after individual steps of modification were characterized by contact angle determination, electrokinetic analysis, X‐ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The contact angle decreased after UV activation due to the formation of oxygen polar groups. The presence of iron on the polymer surfaces, revealed by XPS, showed that IOPs were successfully bound to the polymer surfaces. XRD analysis confirmed that the prepared IOPs were in the form of magnetite (Fe3O4). The best results were obtained for the procedure containing UV surface activation, chitosan grafting, and subsequent IOPs immobilization.

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Section: Resultsmentioning

confidence: 99%

Enhancing immobilization of iron oxide particles on various polymer surfaces

Lupínková¹,

Benkocká²,

Ryšánek³

et al. 2022

Polymer Engineering & Sci

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“…Polyamide (PA) clearly appears as a separate fraction within CDW, while it has not been noticeable in other streams. The remarkable share of PA in CDW might be explained by its good mechanical properties [25].…”

Section: Discussionmentioning

confidence: 99%

Composition of Plastic Fractions in Waste Streams: Toward More Efficient Recycling and Utilization

2019

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Reuse of materials is a significant global goal that contributes to sustainable development. Polymer-specific plastic identification from the waste stream is examined in this study to achieve environmentally optimistic reuse of plastic material in secondary applications. Two diverse waste streams, 86.11 kg of construction and demolition waste (CDW) plastic and 57.74 kg of mechanically sorted plastic, were analyzed by using a handheld tool whose identification technology was based on the near-infrared spectrum. The study indicates a significant effect of human and single fraction on manual separation. The polymer composition in the plastic waste stream varied depending on the source, but the most common plastic grades, polypropylene (PP) and polyethylene (PE), were represented in every waste stream. The waste stream also included unidentified and unfavorable wastes, which indicates that identification of the plastic fractions is needed and more studies should be done in this field in the future.

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“…These pose challenges during collection, separation, and recycling of PSW. The durability of plastics causes their accumulation and persistency in the environment with estimated rate of over 25 MT per year [3].…”

Section: Introductionmentioning

confidence: 99%

“…The interfaces at the phase boundaries are weak, causing structural weaknesses in the emanating compounds. Hence, combined and untreated polymer blends have limited application [25]. Initially, plastic recycling industry focused on basic recycling of single plastics types which generate the highest financial reward.…”

Section: Introductionmentioning

confidence: 99%

Novel trends in plastic waste management

2019

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Nowadays, there exists a global challenge confronting efficient management of municipal solid wastes. Varying degrees of environmental challenges including regular release of greenhouse gases and scarcity of available space for waste disposal have been caused by escalating accumulation of these wastes' materials resulting in inappropriate waste management. These challenges have aroused alarming public concerns, resulting in political legislation aimed at minimizing the amount of wastes getting into the environment. These activities attempt to offer solution which will enhance sustainable waste management, while promoting MSW recycling, and efficient conversion of waste materials to energy, and other valuable chemicals. These conversion procedures can be achieved through use of either biological processes such as anaerobic digestion or thermochemical procedures such as pyrolysis. Thus, the current review elucidates novel routes effectively utilized in converting MSW to energy and other valuable chemicals. Graphic abstract

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Properties of polyamide nanofibers treated by UV-A radiation

Cited by 17 publications

References 13 publications

Enhancing immobilization of iron oxide particles on various polymer surfaces

Enhancing immobilization of iron oxide particles on various polymer surfaces

Composition of Plastic Fractions in Waste Streams: Toward More Efficient Recycling and Utilization

Novel trends in plastic waste management

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