Cu(<scp>i</scp>) stabilizing crosslinked polyethyleneimine

Movahedi, Alireza; Lundin, Angelica; Kann, Nina; Nydén, Magnus; Moth‐Poulsen, Kasper

doi:10.1039/c5cp02198g

Cited by 18 publications

(13 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nitrogen‐rich, cross‐linked polyethylene imine is known for binding metal ions such as copper and rare earth metals due to the metal chelating property . Its particular selectivity for binding copper ions and its absorption kinetics in a variety of media has extensively been studied .…”

Section: Resultsmentioning

confidence: 99%

“…Nitrogen-rich, cross-linked polyethylene imine is known for binding metal ions such as copper and rare earth metals due to the metal chelating property. [33,34] Its particular selectivity for binding copper ions and its absorption kinetics in a variety of media has extensively been studied. [24][25][26][27]35,36] Here, cross-linked PEI was loaded with copper ions by immersing the PEI-coated conducting carbon cloth in a known concentration of copper sulfate solution.…”

Section: Wwwadvsustainsyscommentioning

confidence: 99%

See 1 more Smart Citation

Porous PEI Coating for Copper Ion Storage and Its Controlled Electrochemical Release

Elmas

Gedefaw

Larsson

et al. 2020

Advanced Sustainable Systems

Self Cite

View full text Add to dashboard Cite

The use of copper‐based chemicals to prevent biological growth has been widely practiced in the past. However, leaching of the copper has increased concentrations in ports and marinas, posing a risk to marine life and the environment. It is therefore timely to develop a sustainable antibiofouling coating that could replace conventional copper‐based paints. Herein, the use of cross‐linked polyethylene imine (PEI) coated on conducting carbon cloth electrodes as a material that can absorb copper from seawater and allow for controlled electrochemical release of copper as a biocide to prevent biofouling is proposed. The results show that the porous coating can store and release copper ions over multiple cycles by passing only 1 mA cm−2 current density through the electrode in artificial seawater. This could enable a closed‐cycle, copper‐based antifouling coating, i.e., a coating that uses the well‐established biocidal activity of copper, but without any net release to the ocean.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Wwwadvsustainsyscommentioning

confidence: 99%

Porous PEI Coating for Copper Ion Storage and Its Controlled Electrochemical Release

Elmas

Gedefaw

Larsson

et al. 2020

Advanced Sustainable Systems

Self Cite

View full text Add to dashboard Cite

show abstract

“…The noticeably blue and cyan colors of the PEI-functionalized and TerP-functionalized membranes are consistent with changes expected for Cu 2+ binding by these different chemistries. 62,63 The higher affinity and high capacity Cu 2+ binding exhibited by membranes functionalized with tailored chemical moieties suggest that the binding characteristics of these films can be systematically altered or optimized through the appropriate selection of metal binding groups. No significant change in the sorbent capacity was observed upon recycling these membranes through at least 10 adsorption and regeneration cycles (Supporting Information, Figure S14).…”

Section: Resultsmentioning

confidence: 99%

High-Affinity Detection and Capture of Heavy Metal Contaminants using Block Polymer Composite Membranes

et al. 2018

View full text Add to dashboard Cite

Adsorptive membranes offer one possible solution to the challenge of removing and recovering heavy metal ion contaminants and resources from water supplies. However, current membrane-based sorbents suffer from low binding affinities, leading to issues when contaminants are present at trace concentrations or when the source waters have a high concentration of background electrolytes that compete for open binding sites. Here, these challenges are addressed in the design of a highly permeable (i.e., permeability of ∼2.8 × 104 L m–2 h–1 bar–1) sorbent platform based on polysulfone and polystyrene-b-poly(acrylic acid) composite membranes. The membranes possess a fully interconnected network of poly(acrylic acid)-lined pores, which enables the surface chemistry to be tailored through sequential attachment of polyethylenimine brushes and metal-binding terpyridine ligands. The polyethylenimine brushes increase the saturation capacity, while the addition of terpyridine enables high-affinity binding to a diversity of transition metal ions (i.e., Pd2+, Cd2+, Hg2+, Pb2+, Zn2+, Co2+, Ni2+, Fe2+, Nd3+, and Sm3+). This platform removes these metal contaminants from solution with a sorbent capacity of 1.2 mmol g–1 [based on Cu2+ uptake]. The metal capture performance of the functionalized membranes persists in spite of high concentrations of competitive ions, with >99% removal of Pb2+ and Cd2+ ions from artificial groundwater and seawater solutions. Breakthrough experiments demonstrate the efficient purification of feed solutions containing multiple heavy metal ions under dynamic flow conditions. Finally, fluorescence quenching of the terpyridine moiety upon metal ion complexation offers an in situ probe to monitor the extent of sorbent saturation with a Stern–Volmer association constant of 2.9 × 104 L mol–1. The permeability, capacity, and affinity of these membranes, with high-density display of a metal-binding ligand, offer a chemically tailored platform to address the challenges that arise in ensuring clean water.

show abstract

“…and dissociation (Kd) constants (Equation 1.1), but the group acknowledged that the release of Cu(II) may require an artificial intervention, such as an electrochemical stimulus. 77,79 Furthermore, considering that > 99% of the Cu(II) dissolved in seawater is already strongly complexed by unidentified organic ligands with formation constants in the range of 10 9 -10 14 , the ligand in the coating would have to be a stronger Cu(II)-chelator than the natural ligands in seawater (i.e. Kf > 10 14 ).…”

Section: Conceptmentioning

confidence: 99%

“…Although, in the literature, the more popular route seems to be the incorporation of the ligand in the polymeric binder. 41,79,87,110,111 For example, Trojer et al 87 reported methods for affixing pendant azole ligands, which are strong Cu(II)chelators, to polymers for protection against fouling organisms. El-Wahab et al 112 simply add-mixed arylhydrazone ligand o-methoxybenzaldehyde benzoylhydrazone and its metal complexes in a polyurethane coating, and the film containing the Cu(II) complex had antimicrobial activity against Gram-positive and -negative bacteria and fungi.…”

Section: Formulation Of Cu(ii) Ligands In Coatingsmentioning

confidence: 99%

Selective Metal Coordination in Antifouling Coatings

Robinson¹

View full text Add to dashboard Cite

<p>Marine biofouling is the accumulation of biological material (e.g. microorganisms, soft- and hard-fouling organisms) on the surface of an object submerged in seawater, and it remains a worldwide problem for shipping industries. The fouling of ship hulls results in a reduction of speed and manoeuvrability due to frictional drag, as well as increased fuel consumption and accelerated corrosion, and the exorbitant expenses and losses of efficiency attributed to biofouling have prompted the development of antifouling coatings. Current antifouling paints use copper as a biocidal agent, but copper-based paints are increasingly being banned due to environmental concerns about the non-target effects of leached copper. This project aims to circumvent these concerns and tightening regulations via a revolutionary concept: the development of marine antifouling paints that incorporate Cu(II)-selective ligands to draw the biocidal ingredient (i.e. Cu(II)) from seawater. A multistage strategy emerged for the development of this technology. First, criteria were established for the project’s ideal ligand, and ligands were synthesised or selected based on these criteria. Second, the ligands were incorporated in coatings through covalent modification of the paint binder or additives. Third, methodology was developed and implemented to test each coating’s ability to coordinate and retain Cu(II), as well as its subsequent ability to prevent microfouling by marine bacteria. The suitability of two ligand classes was assessed: acylhydrazones and tetraaza macrocycles, specifically cyclen. Unlike the acylhydrazones, cyclen met the established criteria and was initially evaluated as a curing agent and/or surface-modifier in a two-pack epoxy system with resin Epikote™ 235. However, the Cu(II)-loading by these coatings was relatively low, being at most ~0.05% w/w, and the modification of silica, a common paint additive, with cyclen was explored as an alternative formulation route. The method for the functionalisation of silica with cyclen was optimised, and the maximum Cu(II)-loading achieved by the product was 2.60% w/w. The cyclen-functionalised silica was incorporated on the surface of an epoxy coating, and a bacterial adherence assay was developed to assess the cellular attachment of marine bacterium Vibrio harveyi to this coating, which was found to be undeterred. Yet, the development of the strategy and testing methodology by which the project’s goals may be achieved provides a solid foundation for future work.</p>

show abstract

Cu(i) stabilizing crosslinked polyethyleneimine

Cited by 18 publications

References 42 publications

Porous PEI Coating for Copper Ion Storage and Its Controlled Electrochemical Release

Porous PEI Coating for Copper Ion Storage and Its Controlled Electrochemical Release

High-Affinity Detection and Capture of Heavy Metal Contaminants using Block Polymer Composite Membranes

Selective Metal Coordination in Antifouling Coatings

Contact Info

Product

Resources

About