A Possibility for Construction of an Iodine Cleaning System Based on Doping for π-Conjugated Polymers

Goto, Hiromasa

doi:10.3390/polym3020875

Cited by 23 publications

(13 citation statements)

References 14 publications

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“…Interestingly, the pres ence of iodine in the polymer enhanced the EPR signal by almost fivefold. This ESR signal enhancement was also observed by Goto [232] when doping a composite made of EBPANi and pulp paper with iodine vapor. Based on FTIR, electron paramagnetic resonance (EPR), and 13 C NMR analyses, the structure of I 2 EBPANi was proposed as shown in Figure 13.…”

Section: Iodine-polyaniline Complexsupporting

confidence: 74%

Molecular iodine/polymer complexes

Moulay

2013

Journal of Polymer Engineering

166

127

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A unique feature of molecular iodine by far, is its ability to bind to polymeric materials. A plethora of natural and synthetic polymers develop complexes when treated with molecular iodine, or with a mixture of mole cular iodine and potassium iodide. Many unexpected findings have been encountered upon complexation of iodine and the polymer skeleton, including the color formation, the polymer morphology changes, the compl exation sites or regions, the biological activity, and the electrical conductivity enhancement of the complexes, with poly iodides (I n¯) , mainly I 3¯ and I 5¯, as the actual binding species. Natural polymers that afford such complexes with iodine species are starch (amylose and amylopectin), chitosan, glycogen, silk, wool, albumin, cellulose, xylan, and natural rubber; iodinestarch being the oldest iodinenatural polymer complex. By contrast, numerous synthetic polymers are prone to make com plexes, including poly(vinyl alcohol) (PVA), poly(vinyl pyrrolidone) (PVP), nylons, poly(Schiff base)s, poly aniline, unsaturated polyhydrocarbons (carbon nano tubes, fullerenes C 60 /C 70 , polyacetylene; iodinePVA being the oldest iodinesynthetic polymer complex.

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Section: Iodine-polyaniline Complexsupporting

confidence: 74%

Molecular iodine/polymer complexes

Moulay

2013

Journal of Polymer Engineering

166

127

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“…After doping, a radical concentration slowly increased due to the progress of the doping with iodine, confirming that polarons as radical cations were produced in the main chain of the PANI. This result confirms the iodine doping process of Mt/PANI [17].…”

Section: Electron Spin Resonancesupporting

confidence: 85%

Synthesis and Surface Observation of Montmorillonite/Polyaniline Composites

Yamabe

Goto

2018

J. Compos. Sci.

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Polyaniline (PANI) is synthesized in the presence of montmorillonite (Mt). Mt has small spaces between its layers. This interlayer spacing functions as a reaction field for the production of PANI with an organized structure. Mt/PANI composites thus synthesized were characterized by the IR and the UV-Vis optical absorption spectroscopy measurements. Scanning electron microscopy observation showed that the PANI is covered by the flake structure of the Mt. A cylindrical structure was also observed in the sample. X-ray diffraction analysis indicated that the composite of the PANI and the Mt had an ordered structure, suggesting that the macroscopic structure of the natural clays can provide a unique reaction field for polymerization reactions.

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“…Polymers can be transformed to pose conductivity by allowing the free transfer of electrons between bonds to form anions. Anions and cations react as charge transfer carriers under the influence of the electrical field [ 55 ]. Polymer film is typically non-conductive, but the doping process is effective in enhancing its conductivity.…”

Section: Resultsmentioning

confidence: 99%

Optical Properties and Conductivity of PVA–H3PO4 (Polyvinyl Alcohol–Phosphoric Acid) Film Blend Irradiated by γ-Rays

Susilawati

Prayogi²,

Arif

et al. 2021

Polymers

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This study assesses the optical properties and conductivity of PVA–H3PO4 (polyvinyl alcohol–phosphoric acid) polymer film blend irradiated by gamma (γ) rays. The PVA–H3PO4 polymer film blend was prepared by the solvent-casting method at H3PO4 concentrations of 75 v% and 85 v%, and then irradiated up to 25 kGy using γ-rays from the Cobalt-60 isotope source. The optical absorption spectrum was measured using an ultraviolet–visible spectrophotometer over a wavelength range of 200 to 700 nm. It was found that the absorption peaks are in three regions, namely two peaks in the ultraviolet region (310 and 350 nm) and one peak in the visible region (550 nm). The presence of an absorption peak after being exposed to hυ energy indicates a transition of electrons from HOMO to LUMO within the polymer chain. The study of optical absorption shows that the energy band gap (energy gap) depends on the radiation dose and the concentration of H3PO4 in the polymer film blend. The optical absorption, absorption edge, and energy gap decrease with increasing H3PO4 concentration and radiation dose. The interaction between PVA and H3PO4 blend led to an increase in the conductivity of the resulting polymer blend film.

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A Possibility for Construction of an Iodine Cleaning System Based on Doping for π-Conjugated Polymers

Cited by 23 publications

References 14 publications

Molecular iodine/polymer complexes

Molecular iodine/polymer complexes

Synthesis and Surface Observation of Montmorillonite/Polyaniline Composites

Optical Properties and Conductivity of PVA–H3PO4 (Polyvinyl Alcohol–Phosphoric Acid) Film Blend Irradiated by γ-Rays

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