Synthesis, characterization of poly(allylamine)chelates with Cu(II), Co(II) and Ni(II)

Rivas, Bernabé L.; Seguel, G. V.

doi:10.1007/bf00556806

Cited by 17 publications

(18 citation statements)

References 9 publications

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“…It is known that PAH and chitosan form chelating complexes with Co 2z ions. 38,39 The Co 2z ions compete with protons at low pH to be bound to the polymers. The binding of metal ions to the polymers can be enhanced in the high pH region at the cathode surface and polymer-metal ion complexes can be involved in the deposit formations.…”

Section: Discussionmentioning

confidence: 99%

Electrochemical preparation of composite films containing cationic polyelectrolytes and cobalt hydroxide

Bardetsky¹,

Zhitomirsky²

2005

Surface Engineering

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Composite films consisting of cobalt hydroxide and weak cationic polyelectrolytes, such as poly(allylamine hydrochloride) and chitosan, were obtained by cathodic electrodeposition. The proposed method is based on the electrosynthesis of cobalt hydroxide from the solutions of CoCl 2 and electrophoretic deposition of the polymers. Cathodic deposits were obtained by the galvanostatic method on Pt and Ni substrates. The deposition yield was studied at different concentrations of the polymers and CoCl 2 in solutions. The deposits were studied by thermogravimetric analysis, X-ray diffraction analysis and atomic force microscopy. The deposition mechanism is discussed. The results obtained pave the way for the fabrication of other organic-inorganic composites.

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Section: Discussionmentioning

confidence: 99%

Electrochemical preparation of composite films containing cationic polyelectrolytes and cobalt hydroxide

Bardetsky¹,

Zhitomirsky²

2005

Surface Engineering

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“…The polymer can form hydrogels through crosslinking with epichlorohydrin28 or N , N ′‐methylenebisacrylamide29 and forming an interpenetrating polymer network with chitosan30 or a polyion complex with alginate 31. The binding capabilities of the polymer with various ions32 have made the material attractive for different chemical and biomedical applications, particularly for clinical use as a phosphate binder to treat renal disease 33. In addition, PAA was used in surface modification for biomedical devices and did not show any cytotoxic effects in vitro 34, 35…”

Section: Introductionmentioning

confidence: 99%

Experimental optimization of an in situ forming hydrogel for hemorrhage control

2008

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The fabrication of a novel in situ forming hydrogel composed of a multifunctional poly(ethylene glycol) (PEG) N-hydroxysuccinimide ester (NHS) and poly(allylamine hydrochloride) (PAA) was investigated. FTIR confirmed that PAA formed the hydrogel matrix (i.e., the formation of a PAA-like hydrogel). A factorial experiment was conducted to identify the key parameters that controlled gelation time, gel content, and swelling properties. The type of PEG (e.g., 4- and 6-arm) appeared to play a major role in determining all three performance parameters, with the greatest effect on gelation time. Other influencing factors include (a) the PEG concentration, which contributes to the gelation time and gel content; (b) pH of the buffer used for dissolving each polymer, which can affect the gelation time; and (c) PAA molecular weights, which contribute to the gel content and swelling. The concentration of PAA solution had no significant effects on hydrogel formation and properties within the investigated range, presumably due to negligible changes in the crosslinking density of the hydrogels. The PAA buffer pH influenced the gel content as well. Finally, thromboelastography was used to examine the effects of each polymer and their in situ gelation on blood coagulation in vitro. All individual polymers tested reduced clot strength, while the gelation of the polymers enhanced overall procoagulant effects. These results suggest that the biomaterial can be optimized to provide a combination of rapid gelation and swelling properties suitable for hemorrhage control and thus warrant further studies in animal bleeding models.

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“…Interest in chelating and ion‐exchange resins has been growing during the last decades because of their diverse applications in analytical chemistry,1 hydrometallurgy,2 wastewater treatment,3, 4 catalysis,5, 6 and removal and separation of metal ions from aqueous solution 7–11. In general, desirable properties of the resins are a high capacity for the metal ions of interest, high selectivity, fast kinetics, high mechanical strength, and toughness of the exchanger particles.…”

Section: Introductionmentioning

confidence: 99%

Fe²⁺ and Fe³⁺ adsorption on 2‐vinylpyridine–divinylbenzene copolymers and acrylonitrile–methyl methacrylate–divinylbenzene terpolymers

Rabelo

Silva

Alcântara

et al. 2003

J of Applied Polymer Sci

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ABSTRACT:The adsorption of Fe 2ϩ and Fe 3ϩ ions on 2-vinylpyridine-divinylbenzene copolymer and acrylonitrile-methyl methacrylate-divinylbenzene terpolymer was investigated. In general, the adsorption of Fe 2ϩ and Fe 3ϩ in both resins increased with the enhancement of hydrochloric acid and metal concentration. The metal adsorption on the terpolymer increased sharply with the addition of small portions of ethanol, whereas the adsorption on the copolymer practically was not affected by the presence of the alcohol. An increase in temperature produced a small increase in iron adsorption for both resins. Fourier transform infrared spectra showed that nitrile and ester groups of the terpolymer did not suffer hydrolysis during metal adsorption, even for the highest HCl concentration and the highest temperature applied. A mechanism of iron adsorption through the ion exchange of chloride anions by tetrahedral [FeCl 4 ] 2Ϫ or [FeCl 4 ] Ϫ anions is proposed.

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Synthesis, characterization of poly(allylamine)chelates with Cu(II), Co(II) and Ni(II)

Cited by 17 publications

References 9 publications

Electrochemical preparation of composite films containing cationic polyelectrolytes and cobalt hydroxide

Electrochemical preparation of composite films containing cationic polyelectrolytes and cobalt hydroxide

Experimental optimization of an in situ forming hydrogel for hemorrhage control

Fe²⁺ and Fe³⁺ adsorption on 2‐vinylpyridine–divinylbenzene copolymers and acrylonitrile–methyl methacrylate–divinylbenzene terpolymers

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Synthesis, characterization of poly(allylamine)chelates with Cu(II), Co(II) and Ni(II)

Cited by 17 publications

References 9 publications

Electrochemical preparation of composite films containing cationic polyelectrolytes and cobalt hydroxide

Electrochemical preparation of composite films containing cationic polyelectrolytes and cobalt hydroxide

Experimental optimization of an in situ forming hydrogel for hemorrhage control

Fe2+ and Fe3+ adsorption on 2‐vinylpyridine–divinylbenzene copolymers and acrylonitrile–methyl methacrylate–divinylbenzene terpolymers

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Fe²⁺ and Fe³⁺ adsorption on 2‐vinylpyridine–divinylbenzene copolymers and acrylonitrile–methyl methacrylate–divinylbenzene terpolymers