Temperature and pH affect copper release kinetics from copper metal foil and commercial copperware to food simulants

Koontz, John L.; Liggans, Girvin; Redan, Benjamin W.

doi:10.1080/19440049.2019.1704447

Cited by 16 publications

(14 citation statements)

References 33 publications

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“…After 1, 10, and 15 days, samples were cooled to room temperature, each sachet solution was diluted 10-fold with ultrapure water, briefly sonicated, and analyzed by SP-ICP-MS using the method adapted from the literature. 50 Fifteen day samples were also acidified and analyzed by ICP-MS in standard spectrum mode using a method adapted from a previous report 70 to determine the total Ag release. Note that independent samples were prepared for each time point to minimize environmental contamination due to sampling.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Food and Beverage Ingredients Induce the Formation of Silver Nanoparticles in Products Stored within Nanotechnology-Enabled Packaging

Yang

Paulose

Redan

et al. 2021

ACS Appl. Mater. Interfaces

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Nanotechnology-based packaging may improve food quality and safety, but packages manufactured with polymer nanocomposites (PNCs) could be a source of human dietary exposure to engineered nanomaterials (ENMs). Previous studies showed that PNCs release ENMs to foods predominantly in a dissolved state, but most of this work used food simulants like dilute acetic acid and water, leaving questions about how substances in real foods may influence exposure. Here, we demonstrate that food and beverage ingredients with reducing properties, like sweeteners, may alter exposure by inducing nanoparticle formation in foods contacting silver nanotechnology-enabled packaging. We incorporated 12.8 ± 1.4 nm silver nanoparticles (AgNPs) into polyethylene and stored media containing reducing ingredients in packages manufactured from this material under accelerated room-temperature and refrigerated conditions. Analysis of the leachates revealed that reducing ingredients increased the total silver transferred to foods contacting PNC packaging (by as much as 7-fold) and also induced the (re)formation of AgNPs from this dissolved silver during storage. AgNP formation was also observed when Ag+ was introduced to solutions of natural and artificial sweeteners (glucose, sucrose, aspartame), commercial beverages (soft drinks, juices, milk), and liquid foods (yogurt, starch slurry), and the amount and morphology of reformed AgNPs depended on the ingredient formulation, silver concentration, storage conditions, and light exposure. These results imply that food and beverage ingredients may influence dietary exposure to nanoparticles when PNCs are used in packaging applications, and the practice of using food simulants may in certain cases underpredict the amount of ENMs likely to be found in foods stored in these materials.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Food and Beverage Ingredients Induce the Formation of Silver Nanoparticles in Products Stored within Nanotechnology-Enabled Packaging

Yang

Paulose

Redan

et al. 2021

ACS Appl. Mater. Interfaces

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“…Copper (Cu) and copper alloys are commonly used in industrial applications. Various factors as excellent thermal and electrical conductivities, corrosion resistance, aesthetic appearance, and antimicrobial properties make copper materials are suitable for use in the food sector 1 – 3 . Cu is commonly used in heating and cooling systems, pipelines for domestic and industrial water utilities containing seawater 4 .…”

Section: Introductionmentioning

confidence: 99%

Characterization and performance evaluation of Cu-based/TiO2 nano composites

Сабер

El-Aziz

Felemban

et al. 2022

Sci Rep

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Copper and copper alloys are used in industrial applications and food contact surfaces due to their desirable properties; copper metal matrix composites have been exciting researchers' attention in recent years since they can offer many valuable characteristics. The present study investigated the effects of the TiO2 nanoparticles addition with different weight percent on the hardness and corrosion behavior of copper nanocomposites. The powder metallurgy method was used to fabricate the Cu/TiO2 reinforced with different weight fractions of TiO2 nano particles up to 12 wt.%. The corrosion behavior of fabricated specimens is evaluated using potentiodynamic polarization curves and electrochemical impedance spectroscopy in different solutions. These solutions were 3.5wt.% NaCl, 0.5 NaOH and 0.5 M H2SO4 reflected different pH. The results showed that the addition of TiO2 nano particles improves pure copper's hardness. The hardness of pure copper increased from 53 to 91 HV by adding 12 wt.% TiO2. The corrosion current density (Icorr) of copper nanocomposites test specimens was higher than Icorr of pure copper in all test solutions. As TiO2 nano particles increase, the corrosion resistance of Cu nano composites decreased. All test specimens exhibited little corrosion current density in 3.5 wt.% NaCl solution as compared with other test solutions.

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“…It is worth noting that dialysis is commonly used to purify polymers prepared via ATRP variations or Cu-catalyzed 'click chemistry' ones [55][56][57]. Herein we adopted this methodology to eliminate copper content from the synthesized polymers below the threshold admission value given by the FDA for the food products [58]. The formation of (co)polymers was confirmed by NMR (Supporting information Figure S4, Figure S5) and SEC analysis (Supporting information Figure S1).…”

Section: Resultsmentioning

confidence: 98%

Sugar decorated star-shaped (co)polymers with resveratrol-based core – physicochemical and biological properties

et al. 2022

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Star-shaped glycopolymers due to the attractive combination of the physicochemical, morphological, self-assembly properties along with biological activity have gained increased attention as innovative agents in novel cancer therapies. Unfortunately, the production of these highly desirable biomaterials remains a challenge in modern macromolecular chemistry. The main reason for that is the low polymerizability of ionic glycomonomers originated from their steric congestion and the occurrence of ionic interactions that generally negatively influence the polymerization progress and hinder controllable reaction pathway. In this work, the new ionic sugar monomer was (co)polymerized for the first time via Activator Generated by Electron Transfer Atom Transfer Radical Polymerization (AGET ATRP) using a three-arm resveratrol-based core to obtain star-like (co)polymers. The obtained products were examined in terms of their physicochemical properties and morphology. Aside from the synthesis of these new glycopolymers, also a thorough description of their thermal properties, ability to self-assembly, the formation of stable superstructures was studied in detail. It was found that examined (co)polymers did not show any heterogeneities and phase separation, while their variation of glass transition temperature (Tg) was strictly related to the change in the number of glycomonomer. Also, the stability and shapes of formed superstructures strictly depend on their composition and topology. Finally, we have shown that synthesized carbohydrate-based polymers revealed high antiproliferative activity against several cancer cell lines (i.e., breast, colon, glioma, and lung cancer). The cytotoxic activity was particularly observed for star-shaped polymers that were systematically enhanced with the growing concentration of amine moieties and molecular weight. The results presented herein suggest that synthesized star-shaped glyco(co)polymers are promising as drug or gene carriers in anticancer therapies or anti-tumor agents, depending on their cytotoxicity. Graphical abstract

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Temperature and pH affect copper release kinetics from copper metal foil and commercial copperware to food simulants

Cited by 16 publications

References 33 publications

Food and Beverage Ingredients Induce the Formation of Silver Nanoparticles in Products Stored within Nanotechnology-Enabled Packaging

Food and Beverage Ingredients Induce the Formation of Silver Nanoparticles in Products Stored within Nanotechnology-Enabled Packaging

Characterization and performance evaluation of Cu-based/TiO2 nano composites

Sugar decorated star-shaped (co)polymers with resveratrol-based core – physicochemical and biological properties

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