LLDPE Composites with Nanosized Copper and Copper Oxides for Water Disinfection

Gurianov, Yanna; Nakonechny, Faina; Albo, Yael; Nisnevitch, Marina

doi:10.3390/polym12081713

Cited by 8 publications

(7 citation statements)

References 28 publications

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“…The addition of CuNPs into iPP has given excellent results for the inhibition of the growth of a broad microorganism spectrum. Applications of such polymeric composites include among the most important ones’ food packaging, medical instruments, and water treatment [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Property of Polypropylene Composites and Functionalized Copper Nanoparticles

et al. 2021

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Copper nanoparticles (CuNPs) functionalized with polyethyleneimine (PEI) and 4-aminobutyric acid (GABA) were used to obtain composites with isotactic polypropylene (iPP). The iPP/CuNPs composites were prepared at copper concentrations of 0.25–5.0 wt % by melt mixing, no evidence of oxidation of the CuNP was observed. Furthermore, the release of copper ions from iPP/CuNPs composites in an aqueous medium was studied. The release of cupric ions was higher in the composites with 2.5 and 5.0 wt %. These composites showed excellent antibacterial activity (AA) toward Pseudomona aeruginosa (P. aeruginosa) and Staphylococcus aureus (S. aureus). The incorporation of CuNP into the iPP polymeric matrix slightly decreased the thermal stability of the composite material but improved the crystallinity and the storage modulus. This evidence suggests that CuNPs could work as nucleating agents in the iPP crystallization process. The iPP/CuNPs composites presented better AA properties compared to similar composites reported previously. This behavior indicates that the new materials have great potential to be used in various applications that can be explored in the future.

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Section: Introductionmentioning

confidence: 99%

Antimicrobial Property of Polypropylene Composites and Functionalized Copper Nanoparticles

et al. 2021

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“…The thermal adhesion of RB6@ORMOSIL onto the LLDPE polymer was performed as described by us earlier for the immobilization of copper nanoparticles onto LLDPE [ 47 ]. In brief, 1 g LLDPE pellets were melted at 130 °C using the maximal pressure of the heat-press machine under 450 kg f for 3 min.…”

Section: Methodsmentioning

confidence: 99%

Antibacterial Activity of Rose Bengal Entrapped in Organically Modified Silica Matrices

Gurianov

Meistelman

Albo

et al. 2022

IJMS

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Photosensitizers (PSs) are known as powerful antibacterial agents that are activated by direct exposure to visible light. PSs can be noncovalently entrapped into the silica gel network for their controlled release into a contaminated area. The immobilization of PS-containing gel matrices on a polymer support expands their possible applications, such as antibacterial surfaces and coatings, which can be used for the disinfection of liquids. In the current study, we report the use of Rose Bengal (RB) incorporated into organically modified silica matrices (RB@ORMOSIL matrices) by the sol-gel technique. The RB matrices exhibit high activity against Gram-positive and Gram-negative bacteria under illumination by white light. The amount and timing of solidifier addition to the matrix affected the interaction of the latter with the RB, which in turn could affect the antibacterial activity of RB. The most active specimen against both Gram-positive and Gram-negative bacterial cells was the RB6@ORMOSIL matrix immobilized on a linear low-density polyethylene surface, which was prepared by an easy, cost-effective, and simple thermal adhesion method. This specimen, RB6@OR@LLDPE, showed the low release of RB in an aqueous environment, and exhibited high long-term antibacterial activity in at least 14 rounds of recycled use against S. aureus and in 11 rounds against E. coli.

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“…These chemically resistant aluminosilicate structures may even withstand the aggressive conditions frequently met in wastewater systems [33]. They exhibit good antimicrobial effects on Cu 2+ -treated geopolymer surfaces and a sufficient in vitro stability in the long term [69,70]. Hashimoto et al [70] have demonstrated that the antimicrobial activity of metakaolin-based geopolymers against fungi hyphae can be increased by the incorporation of Cu 2+ into the geopolymer structure.…”

Section: Implications For Water Treatment and Environmental Remediationmentioning

confidence: 99%

Substantial Copper (Cu2+) Uptake by Metakaolin-Based Geopolymer and Its Resistance to Acid Leaching and Ion Exchange

et al. 2023

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Geopolymers are inorganic, chemically resistant aluminosilicate-based binding agents, which remove hazardous metal ions from exposed aqueous media. However, the removal efficiency of a given metal ion and the potential ion remobilization have to be assessed for individual geopolymers. Therefore, copper ions (Cu2+) were removed by a granulated, metakaolin-based geopolymer (GP) in water matrices. Subsequent ion exchange and leaching tests were used to determine the mineralogical and chemical properties as well as the resistance of the Cu2+-bearing GPs to corrosive aquatic environments. Experimental results indicate the pH of the reacted solutions to have a significant impact on the Cu2+ uptake systematics: the removal efficiency ranged from 34–91% at pH 4.1–5.7 up to ~100% at pH 11.1–12.4. This is equivalent to Cu2+ uptake capacities of up to 193 mg/g and 560 mg/g in acidic versus alkaline media. The uptake mechanism was governed by Cu2+-substitution for alkalis in exchangeable GP sites and by co-precipitation of gerhardtite (Cu2(NO3)(OH)3) or tenorite (CuO) and spertiniite (Cu(OH)2). All Cu-GPs showed excellent resistance to ion exchange (Cu2+ release: 0–2.4%) and acid leaching (Cu2+ release: 0.2–0.7%), suggesting that tailored GPs have a high potential to immobilize Cu2+ ions from aquatic media.

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LLDPE Composites with Nanosized Copper and Copper Oxides for Water Disinfection

Cited by 8 publications

References 28 publications

Antimicrobial Property of Polypropylene Composites and Functionalized Copper Nanoparticles

Antimicrobial Property of Polypropylene Composites and Functionalized Copper Nanoparticles

Antibacterial Activity of Rose Bengal Entrapped in Organically Modified Silica Matrices

Substantial Copper (Cu2+) Uptake by Metakaolin-Based Geopolymer and Its Resistance to Acid Leaching and Ion Exchange

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