Iodination of plasticized poly(vinyl chloride) in aqueous media via phase transfer catalysis

Lakshmi, S.; Jayakrishnan, A.

doi:10.1002/app.10176

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…Most importantly, we performed the control experiment without employing the COF to indirectly confirm that this activity is preferentially due to the interaction of Zn 2+ and iodide with the COF. [ 62–64 ] No peaks were observed with the addition of only ZnSO 4 . However, when 2 µL of ZnI 2 (0.2 mol) was added to the aqueous medium, a sharp peak appeared at ≈260 nm, very similar to the one observed in the presence of the COF (Figure S38, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Made to Measure Squaramide COF Cathode for Zinc Dual‐Ion Battery with Enriched Storage via Redox Electrolyte

Kushwaha,

Jain,

Shekhar

et al. 2023

Advanced Energy Materials

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Aqueous rechargeable batteries are promising grid‐scale energy storage devices because of their affordability, operational safety, and environmental benignity. Among these, Zn‐ion batteries (ZIBs) have unfolded new horizons. Designing superior cathodes for ZIBs is crucial. Covalent organic frameworks (COFs) can be made redox active with a high storage surface. Here, for the first time, a chelating COF with redox‐active ZnI2 in a ZnSO4(aq) electrolyte is combined. Including iodide harvests an approximately threefold enhancement in capacity from 208 to 690 mAh g−1 at 1.5 A g−1, the highest among all the COF‐derived ZIBs. Remarkably, a charge–discharge curve at 1.3 V exhibits very limited dropout voltage and super‐flat platform, with a remarkable capacity of 600 mAh g−1 at 5 A g−1 stable up to 6000 cycles, confirming that the polyiodide generation and storage are sustainable. The COF's dual‐ion storage (Zn2+ and polyidode) delivers a ZIB with the highest energy density. Spectro‐electrochemical measurements coupled with X‐ray photoelectron spectroscopy unambiguously unveil the existence of multiple polyiodide species, with I3− and IO3− ions as the prominent species. The latter gets reduced at the COF electrode under an applied potential, leaving I3− as the major species stored on the COF. The prospect of COF‐polyiodide(aq) is a windfall for metal‐ion batteries.

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Section: Resultsmentioning

confidence: 99%

Made to Measure Squaramide COF Cathode for Zinc Dual‐Ion Battery with Enriched Storage via Redox Electrolyte

Kushwaha,

Jain,

Shekhar

et al. 2023

Advanced Energy Materials

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“…The authors utilized this method to modify the PVC surface with sulfides, which resulted in a crosslinking of the polymer surface and a reduced DEHP migration, and at the same time a decreasing level of platelet adhesion 73, 74. Other proposed modifications included iodide PVC 70, thiosulfate 71 and azide PVC 69, 72. Azide PVC (N 3 PVC) showed an increased resistance to bacterial adhesion 72 and its surface can be photocrosslinked 69 to reduce plasticizer leaching.…”

Section: Pvc Modificationmentioning

confidence: 99%

Chemical Modification of Polymer Ion‐Selective Membrane Electrode Surfaces

Pawlak

Bakker

2014

Electroanalysis

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Membrane/sample interactions play a crucial role in the biomedical application of ion selective electrodes (ISEs). Modulation of membrane surface properties can be used as a way to enhance biocompatibility and in fabrication of biosensors through biomolecules immobilization. This review discusses advances in methods and materials used for the surface modifications of polymeric ion-selective membranes in view of their applications in clinical diagnostics

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Effect of the nucleophilicity and solvent on the chemical modification of flexible poly(vinyl chloride) by substitution

Kameda¹,

Fukuda²,

Grause³

et al. 2011

Polymer Engineering & Sci

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The chemical modification might become an alternative to the thermal degradation of waste polyvinylchloride (PVC). Therefore, the nucleophile substitution of chlorine from flexible PVC by hydroxide (OH−), thiocyanate (SCN−), azide (N3−), and iodide (I−) was investigated in ethylene glycol (EG) at 190°C. With the exception of I−, all nucleophiles used resulted in substitution yields of about 20%. However, also high elimination yields were observed. When SCN was used as the nucleophile, the substitution/elimination ratio increased with decreasing temperature. The product at 150°C contained a mixed structure of thiocyanate and isothiocyanate groups, while at 190°C, only the structure of isothiocyanate was present the product, due to the isomerization of the SCN group under the formation of NCS at elevated temperatures. The substitution and dehydrochlorination yields increased with an increasing molar SCN/Cl ratio. When EG was replaced by diethylene glycol (DEG) or triethylene glycol (TEG), the dehydrochlorination was found to proceed more rapidly. The use of a solvent with a lower polarity improved the contact between the solvent and the polymer; however, solvents with a lower polarity favor the elimination over the substitution. Therefore, the substitution–elimination ratio increased in the order EG > DEG > TEG. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers.

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Iodination of plasticized poly(vinyl chloride) in aqueous media via phase transfer catalysis

Cited by 6 publications

References 23 publications

Made to Measure Squaramide COF Cathode for Zinc Dual‐Ion Battery with Enriched Storage via Redox Electrolyte

Made to Measure Squaramide COF Cathode for Zinc Dual‐Ion Battery with Enriched Storage via Redox Electrolyte

Chemical Modification of Polymer Ion‐Selective Membrane Electrode Surfaces

Effect of the nucleophilicity and solvent on the chemical modification of flexible poly(vinyl chloride) by substitution

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