Polypyrrole/Al<sub>2</sub>O<sub>3</sub>nanocomposites: preparation, characterisation and electromagnetic shielding properties

Trung, Vũ Quốc; Tung, Duong Ngoc; Huyen, Duong Ngoc

doi:10.1080/17458080903115361

Cited by 33 publications

(11 citation statements)

References 9 publications

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“…The peak at 1539 cm −1 is the characteristic PPy ring vibration, that at 1171 cm −1 is attributed to the breathing vibration of the PPy ring, the sharp band at 1380 cm −1 is the in‐plane deformation of the NH bonds, and the peak at 1036 cm −1 corresponds to the CN stretching vibration and pyrrole CH bonding in‐plane vibrations. This is consistent with the known structure of pyrrole, a five‐membered heterocyclic compound containing nitrogen atoms . Moreover, the Raman spectra of the PPy‐DBS and PVDF membranes were measured using a 633 nm laser with 2.5 mW power (Figure S1b, Supporting Information).…”

Section: Resultssupporting

confidence: 81%

Electrically Pore‐Size‐Tunable Polypyrrole Membrane for Antifouling and Selective Separation

Tan

Zhu

et al. 2019

Adv Funct Materials

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Antifouling and selectivity are major challenges for membrane separation technology. Herein, a polypyrrole-dodecylbenzene sulfonate (PPy-DBS) membrane with tunable pores is fabricated to alleviate pore blocking and achieve selective separation. The insertion/extraction of ions during the electrical redox process causes the change of PPy-DBS volume, so that the membrane pores can be tuned in situ by applying an external redox potential. The pore size of a fouled membrane is enlarged under an oxidation voltage, then the membrane is backwashed to eliminate foulants in the pores, after which membrane pore size is recovered under a reduction voltage. Thus, membrane fouling can be effectively alleviated by adjusting the membrane pore size combined with cleaning. The specific flux of PPy-DBS membrane increased by 21.91% after applying the voltages and backwashing, and it exhibits great recycling performance. Moreover, the distribution of humic acid macromolecules in the permeate significantly decreased, proving the enhanced sieving effect of smaller membrane pores under negative voltage. This study provides an intelligent strategy for fouling prevention and selective separation in water treatment.using various feed solutions with different cations and ionic strengths. Herein, by combining electrochemical and membrane separation, we provided an electrically responsive UF membrane for fouling alleviation and selective separation, which is a promising candidate in applications such as water purification. Figure 6. A) Na 1s spectra and B) S 2p spectra of PPy-DBS membrane. 3D AFM images of PPy-DBS membranes in different electrochemical states. C) Original state. D) Oxidized state. E) Reduced state. www.afm-journal.de www.advancedsciencenews.com 1903081 (7 of 8)

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Section: Resultssupporting

confidence: 81%

Electrically Pore‐Size‐Tunable Polypyrrole Membrane for Antifouling and Selective Separation

Tan

Zhu

et al. 2019

Adv Funct Materials

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“…At higher temperature (300-600 C), the change in weight is attributed to the decomposition of the oxidised PPy. These results are in agreement with previous TGA analyses of PPy/Al 2 O 3 nanocomposites [18]. TGA curves show the gradual weight loss, which could be explained by the different length of polymer chains as well as the presence of MMT in the nanocomposites.…”

supporting

confidence: 82%

Double corrosion protection mechanism of molybdate-doped polypyrrole/montmorillonite nanocomposites

Trung¹,

Hoan²,

Phung³

et al. 2012

Journal of Experimental Nanoscience

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Nanocomposites based on polypyrrole (PPy) doped with molybdate (PPy(MoO 4 )) and montmorillonite (MMT) were prepared by chemical polymerisation. The morphology of nanocomposite particles was studied by scanning electron microscopy. The chemical structure of conducting polymers (CPs) in nanocomposites was characterised by Raman spectroscopy. The thermal analysis showed that all CPs in the nanocomposites were stable for more than 500 C. Energy diffraction X-ray showed that the amount of Mo in element the PPy(MoO 4 )/MMT nanocomposite was 5.55%. The corrosion protection mechanism of the nanocomposites was investigated by electrochemical methods, showing that MMT acted as a barrier layer in nanocomposite and molybdate as an inhibitor for corrosion protection of metal.

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“…Electro-conductive textiles can be prepared by using in situ chemical, in situ electrochemical, in situ vapor phase polymerization, in situ polymerization in super critical fluid, solution coating processes, etc. [48,49,55–62].…”

Section: Coating Methods Of Conductive Polymers Onto Textilesmentioning

confidence: 99%

Conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding: A review

Maity

Chatterjee

2016

Journal of Industrial Textiles

124

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This article reviews the preparation, development and characteristics of conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding. Modification of ordinary textile materials in the form of electro-conductive composites makes them suitable for this purpose. Various metallic and non-metallic electro-conductive textiles have been explored here as the material for electromagnetic shielding. Different approaches of preparing textile electromagnetic shield have been described here. Recent advancements of application of conductive polymers in the field of textile electromagnetic shielding are described. Conductive polymer-coated textile materials showed superior electrical property as electromagnetic shield. Different methods of applications of conductive polymers onto textile surface are described here with their relative merits and demerits. Different conductive polymer-coated woven and nonwoven fabrics prepared by various researchers for electromagnetic shielding are taken into account. The effects of different process parameters of polymer processing on electromagnetic shielding are described.

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Polypyrrole/Al₂O₃nanocomposites: preparation, characterisation and electromagnetic shielding properties

Cited by 33 publications

References 9 publications

Electrically Pore‐Size‐Tunable Polypyrrole Membrane for Antifouling and Selective Separation

Electrically Pore‐Size‐Tunable Polypyrrole Membrane for Antifouling and Selective Separation

Double corrosion protection mechanism of molybdate-doped polypyrrole/montmorillonite nanocomposites

Conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding: A review

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Polypyrrole/Al2O3nanocomposites: preparation, characterisation and electromagnetic shielding properties

Cited by 33 publications

References 9 publications

Electrically Pore‐Size‐Tunable Polypyrrole Membrane for Antifouling and Selective Separation

Electrically Pore‐Size‐Tunable Polypyrrole Membrane for Antifouling and Selective Separation

Double corrosion protection mechanism of molybdate-doped polypyrrole/montmorillonite nanocomposites

Conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding: A review

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Polypyrrole/Al₂O₃nanocomposites: preparation, characterisation and electromagnetic shielding properties