Complexes of heavy metals with nitrogen containing copolymers - electrochemical and physicomechanical properties

Turmanova, Sevdalina; Str, Y. Yakimov

doi:10.3144/expresspolymlett.2007.80

Cited by 10 publications

(4 citation statements)

References 18 publications

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“…The formation of the complexes was carried out in solutions of the following salts: FeCl 3 ·6H 2 O, CoCl 2 ·6H 2 O, VOSO 4 ·5H 2 O, Na 2 MoO 4 ·2H 2 O, and Na 2 WO 4 ·2H 2 O. The introduction of metal ions depended on the degree of grafting of 4‐vinylpyridine and it was found to be from 0.03 to 14.96 and from 0.11 to 34.48 mg metal ions per gram of polymer carrier for polytetrafluoroethene and polyethene, respectively 7. The newly synthesized starch graft copolymers containing aminoethyl groups was used for removing Cu (II) and Pb (II) ions in the aqueous solution by the effective complexation of amine group with Cu (II) and Pb (II) ions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and amidoximation of diaminomaleodinitrile‐functionalized polyethylene terephthalate grafts for collecting heavy metals from wastewater

Abdel-Razik

Kenawy

2012

J of Applied Polymer Sci

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Synthesis, characterization, and amidoximation of diaminomaleodinitrile-functionalized polyethylene terephthalate (PET) grafts were studied. Azobisisobutyronitrile (AIBN) was used as an initiator. Optimum conditions for grafting were as follows: monomer concentrationWater uptake of the grafted-PET film increased with the increase of grafting yield. The imparted cyano group of the grafted polymer chains (with degree of grafting up to 83%) was converted into amidoxime group by reaction with hydroxylamine. The unique advantage of this polymer is that it contains double amidoxime groups per repeating unit and an additional diethylene spacer unit between neighboring amidoxime groups in each monomeric unit. The grafted-PET films were characterized by FTIR spectroscopy, differential scanning calorimetry (DSC), and thermal gravimetric analysis (TGA). The grafted-PET films are more thermally stable than the ungrafted-PET membrane, since the grafted mem-brane showed a single degradation pattern despite having two components. A decrease in T g values is observed as the grafting yield of copolymers increases indicating the incorporation of polydiaminomaleodinitrile chains in amorphous copolymers with higher thermal stability. The prepared amidoximated DAMN83-g-PET was investigated for its properties in removing heavy toxic metals, such as Pb 2þ , Cd 2þ , Zn 2þ , Fe 2þ , Cu 2þ , Ni 2þ , Co 2þ , and Ag 1þ from waste water. The amidoximated-film is characterized by a considerably greater binding ability with respect to heavy metals. The nature of the metal ion also has great importance in the amount binding to the polymeric material. The kinetics of the sorption/desorption process for Co 2þ , Ni 2þ , and Zn 2þ are investigated.

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and amidoximation of diaminomaleodinitrile‐functionalized polyethylene terephthalate grafts for collecting heavy metals from wastewater

Abdel-Razik

Kenawy

2012

J of Applied Polymer Sci

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“…28 On the other hand, P4VP also has promising potential applications because it shows biocompatibility with human cells; is cationic in aqueous medium and its pKa is close to 5. 16 P4VP graft copolymers are very interesting because they show the ability to retain metallic ions, 29,30 anti-inflammatory, or antimicrobial drugs 2 ; besides, also it has the ability to affix anti-cancer drugs when is grafted onto graphene oxide. 31 In this article, we report the effect of pH-sensitive polymers (PAAc, P4VP, and PVim) over the LCST of SR-g-NVCL (thermo-sensitive material).…”

Section: Introductionmentioning

confidence: 99%

Comonomer effect: Switching the lower critical solution temperature to upper critical solution temperature in thermo‐pH sensitive binary graft copolymers

Pino‐Ramos

Cedillo

López‐Barriguete

et al. 2019

J of Applied Polymer Sci

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Hydrophilic biocompatible surfaces can be obtained by grafting stimuli‐sensitive polymers onto commercially available medical devices. Thermo and pH‐responsive polymers are two of the most studied materials due to their potential application as drug delivery systems. Poly(N‐vinylcaprolactam) has a lower critical solution temperature (LCST) near to physiological temperature. However, when it is grafted with pH‐sensitive moieties its LCST it is affected undergoing remarkable displacements. We studied the effect of acrylic acid (AAc), 4‐vinylpyridine (4VP), and 1‐vinylimidazole (Vim) on the LCST of N‐vinylcaprolactam (NVCL) grafted onto silicone rubber (SR), and SR‐g‐NVCL (32.5 °C). The binary graft copolymers were obtained by ionizing grafting radiation using the simultaneous technique; the samples were characterized by Fourier transform infrared attenuated total reflectance (FTIR‐ATR), cross‐polarization magic angle spinning nuclear magnetic resonance (CP/MAS 13C‐NMR), and thermogravimetrical analysis (TGA). LCST value was dramatically affected by the comonomer content; even it was observed the switching from LCST to upper critical solution temperature (UCST) for (SR‐g‐NVCL)‐g‐AAc and (SR‐g‐NVCL)‐g‐4VP samples. The observed behavior is rarely reported for binary graft copolymers. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48170.

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“…After a few moments, the fibers became much more rigid, which is evident from the character of their floating in the solution. The rigidity of the polymer is increased due to the formation of complexes of the pyridine units with the Cu(II) ions 25–28. The use of ethanol as a co‐solvent for the salt and the polymer produced better results than simply adding the salt into the suspension of the fibers in acidic water.…”

Section: Resultsmentioning

confidence: 99%

A Novel Fibrous Material Created by Self‐Rolling of a Patterned Polymer Thin Film

Luchnikov¹,

Saito²,

Tzanis³

2012

Macromol. Rapid Commun.

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A new kind of a fibrous material is produced by controlled self-rolling of patterned thin poly(4-vinyl)pyridine films in acidic water. Self-rolling is induced by unequal swelling of the top and the bottom layers of the films in the solvent. Rolling starts from parallel scratches in the film and results in twin-scroll fibers. The fibers are stabilized by staining with CuCl(2) salt and freeze-dried. The output of the fiber material production is of the order of 1 cm(3) from approximately 50 cm(2) of the patterned polymer film. The approach opens new broad opportunities for creation of smart fibrous materials via loading the fibers with functional micro- and nanoparticles.

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Complexes of heavy metals with nitrogen containing copolymers - electrochemical and physicomechanical properties

Cited by 10 publications

References 18 publications

Synthesis, characterization, and amidoximation of diaminomaleodinitrile‐functionalized polyethylene terephthalate grafts for collecting heavy metals from wastewater

Synthesis, characterization, and amidoximation of diaminomaleodinitrile‐functionalized polyethylene terephthalate grafts for collecting heavy metals from wastewater

Comonomer effect: Switching the lower critical solution temperature to upper critical solution temperature in thermo‐pH sensitive binary graft copolymers

A Novel Fibrous Material Created by Self‐Rolling of a Patterned Polymer Thin Film

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