Polychelates of poly(acrylic acid- co -acrylamide)with Cu(II), Co(II), and Ni(II)

Rivas, B. L.; Seguel, G. V.

doi:10.1007/s002890050273

Cited by 23 publications

(12 citation statements)

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“…Second, Cd 2+ ions were introduced into the core of polymer brushes via ion exchange between Cd 2+ and Na + . The uncoordinated Cd 2+ ions were removed by either membrane dialysis or precipitation, and then composites of polymer brushes and Cd 2+ ions, named polychelates ,76, 134 were obtained. Finally, H 2 S gas was introduced into the dispersion of the polychelates, and CdS nanoparticles formed instantly.…”

Section: Hybrid Structures Made From Cylindrical Polymer Brushesmentioning

confidence: 99%

Cylindrical polymer brushes

Zhang

Müller

2005

J. Polym. Sci. A Polym. Chem.

600

692

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ABSTRACT:In recent years, research on cylindrical polymer brushes (or molecular bottlebrushes) has received significant attention. In this article, we discuss various strategies for their synthesis and the unique properties arising from their regular multibranched structure. Some recent advances in the application of cylindrical polymer brushes are highlighted. Amphiphilic core-shell cylindrical polymer brushes, for example, have been successfully used as single molecular templates for inorganic nanoparticle formation.

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Section: Hybrid Structures Made From Cylindrical Polymer Brushesmentioning

confidence: 99%

Cylindrical polymer brushes

Zhang

Müller

2005

J. Polym. Sci. A Polym. Chem.

600

692

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“…Polymers containing metals have emerged as new‐generation materials with tremendous potential in applications such as superconducting materials, ultrahigh‐strength materials, liquid crystals, catalysts, and biocompatible polymers 1–7. The structures of some polymer/metal‐ion complexes have been reported in the literature 1, 7–12…”

Section: Introductionmentioning

confidence: 99%

Water‐soluble amine and imine polymers with the ability to bind metal ions in conjunction with membrane filtration

Rivas

Pooley

Pereira

et al. 2005

J of Applied Polymer Sci

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ABSTRACT:The commercial polymers poly(ethylene imine) (PEI), poly(ethylene imine epichlorohydrin), and poly(dimethylamine-co-epichlorohydrin) were purified and fractionated by ultrafiltration. Their metal-ion-binding properties with respect to different ligand groups and the effect of the concentration on the retention properties were investigated. The amine ligands of the polymers formed the most stable complexes with the metal ions. In general, there was an effect of the pH and polymer fraction size on the retention properties. As the pH and polymer fraction size increased, the affinity to bind metal ions also increased. PEI had the highest metal-retention values, particularly at higher pHs, at which the amine groups were nonprotonated and could coordinate easily with the metal ions. Only Pb(II) was poorly retained. The affinity for all the metal ions, except Pb(II), increased significantly at pH 5. The metal-ion retention decreased quickly as the filtration factor increased, except for Cu(II), Co(II), Ni(II), Cd(II), and Zn(II) ions, which were retained by over 40% at a filtration factor of 4. For other metal ions such as Pb(II), Ca(II), and Mg(II), only 10% remained bound to the polymer.

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“…A formação do complexo leva a uma contração da molécula, observando-se, com isso, uma diminuição da viscosidade da solução. O resultado pode ser interpretado como a formação de um complexo estável de Cu (II) com os grupamentos hidroxila do poli(álcool vinílico) [4,5] .…”

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“…Ions metálicos podem formar complexos hidrossolúveis ao interagir com poliácidos mas após adição de polibase um complexo insolúvel é formado. Nesse último caso, os ions metálicos passam a integrar a estrutura do complexo formado pela reação com os polieletrólitos que pode, em alguns casos, ser dissolvido, permitindo a recuperação de seus componentes macromoleculares [5,7,8] .…”

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Avaliação da interação macromolécula/íon Zn+2 em meio aquoso: poli(acrilamida-co-ácido acrílico) e taninos

2000

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Este trabalho visa o estudo da interação entre polímeros sintéticos e produtos naturais à base de taninos com o íon zinco (Zn+2) em meio aquoso para sua utilização na remoção de metais em efluentes. Uma série de copolímeros poli(acrilamida-co-ácido acrílico) de diferentes composições e homopolímeros de acrilamida e de ácido acrílico foram preparados, assim como, taninos comerciais foram utilizados como recebidos e purificados por extração. Uma metodologia de avaliação da eficiência de interação da macromolécula com o íon Zn+2 foi desenvolvida baseada em curva padrão de intensidade de absorção na região do ultravioleta-visível (UV-VIS) em função da concentração do complexo formado, utilizando colorimetria. A capacidade de interação com o íon zinco foi ligeiramente maior para os polímeros sintéticos porém o produto natural tem a vantagem de apresentar um custo mais baixo.

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Polychelates of poly(acrylic acid- co -acrylamide)with Cu(II), Co(II), and Ni(II)

Cited by 23 publications

References 1 publication

Cylindrical polymer brushes

Cylindrical polymer brushes

Water‐soluble amine and imine polymers with the ability to bind metal ions in conjunction with membrane filtration

Avaliação da interação macromolécula/íon Zn+2 em meio aquoso: poli(acrilamida-co-ácido acrílico) e taninos

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