High electrically conductive polyaniline/partially phosphorylated poly(vinyl alcohol) composite films via aqueous dispersions

Chen, Fei; Liu, Peng

doi:10.1007/s13233-011-0901-1

Cited by 18 publications

(15 citation statements)

References 45 publications

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“…Therefore, water‐soluble polymeric stabilizers are used to prevent the macroscopic precipitation of conducting polymers . It was reported by Chen and Liu that micrometer‐sized particles of large polydispersity in size were obtained for PU/polyaniline composites in the absence of PVP and displayed a coral‐like morphology. The particle size and polydispersity were reduced with the addition of PVP, and particles of good dispersity were obtained .…”

Section: Resultsmentioning

confidence: 99%

Preparation, morphology, and conductivity of waterborne, nanostructured, cationic polyurethane/polypyrrole conductive coatings

Wang

Liu

Fei

et al. 2014

J of Applied Polymer Sci

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To endow cellulose fiber papers with good conductivity and simultaneously retain the mechanical strength of the conductive paper, a kind of waterborne, nanostructured, cationic polyurethane (CPU)/polypyrrole (PPy) conductive coatings were developed to modify the paper surface. Fourier transform infrared spectroscopy, atomic force microscopy, and thermogravimetry-differential thermogravimetry demonstrated that the peak associated with hydrogen bonding between ANH and C@O of CPU was shifted, and chemical bonds between CPU and PPy were formed. Good compatibility between CPU and PPy was simultaneously established. Transmission electron microscopy and atomic force microscopy also suggested that PPy was encased and embedded in the CPU colloidal particles in a uniform style, and the surface of the CPU/PPy film was covered with a smooth, coherent conductive layer. With increasing pyrrole (Py) content from 5 to 20 wt %, the particle size increased from 55.08 to 74.59 nm, and the dispersity index (DPI) decreased. In addition, the conductivity of CPU/PPy increased from 0.1 to 5.0 S/cm. When the Py content was greater than 20 wt %, apparent increases in the particle size and DPI were detected as was particle coagulation; this resulted in decreased conductivity. Compared with the uncoated paper, the paper coated with CPU/PPy dispersions displayed different surface morphologies. The surface of the paper was completely enwrapped by the CPU/PPy conductive films when the coating amount was 45.42 g/m 2 . With increasing coating amounts from 10.35 to 67.86 g/m 2 , the conductivity of the conductive coated paper increased from 2.78 3 10 23 to 2.16 S/cm, the tensile strength increased from 35.3 to 60.4 N m/g, and the conductive coated paper displayed good conductivity stability.

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Section: Resultsmentioning

confidence: 99%

Preparation, morphology, and conductivity of waterborne, nanostructured, cationic polyurethane/polypyrrole conductive coatings

Wang

Liu

Fei

et al. 2014

J of Applied Polymer Sci

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“…SEM morphology (Figs 2a and 6a) demonstrates that smooth and uniform PANI-g-EPVA nanocomposite film can be obtained when the aniline content is 30%, which is entirely different from the reported research3050. In general, PANI aggregations tend to gather on the composite film surface to form inhomogeneous surface3050.…”

Section: Resultsmentioning

confidence: 61%

“…As a polymer matrix, polyvinyl alcohol (PVA) has attracted more attention because of its advantages including non-toxicity, water-solubility, good chemical stability, toughness and adhesion property, film-forming property and possible coupling of charge transport with the motion of its hydroxyl groups 30 31 . Moreover, PVA is able to simultaneously functionalise as polymeric stabilizer, co-dopant and matrix 31 32 33 34 .…”

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confidence: 99%

Facile approach to fabricate waterborne polyaniline nanocomposites with environmental benignity and high physical properties

Wang

Wen

et al. 2017

Sci Rep

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Waterborne polyaniline (PANI) dispersion has got extensive attention due to its environmental friendliness and good processability, whereas the storage stability and mechanical property have been the challenge for the waterborne PANI composites. Here we prepare for waterborne PANI dispersion through the chemical graft polymerisation of PANI into epichlorohydrin modified poly (vinyl alcohol) (EPVA). In comparison with waterborne PANI dispersion prepared through physical blend and in situ polymerisation, the storage stability of PANI-g-EPVA dispersion is greatly improved and the dispersion keeps stable for one year. In addition, the as-prepared PANI-g-EPVA film displays more uniform and smooth morphology, as well as enhanced phase compatibility. PANI is homogeneously distributed in the EPVA matrix on the nanoscale. PANI-g-EPVA displays different morphology at different aniline content. The electrical conductivity corresponds to 7.3 S/cm when only 30% PANI is incorporated into the composites, and then increases up to 20.83 S/cm with further increase in the aniline content. Simultaneously, the tensile strength increases from 35 MPa to 64 MPa. The as-prepared PANI-g-EPVA dispersion can be directly used as the conductive ink or coatings for cellulose fibre paper to prepare flexible conductive paper with high conductivity and mechanical property, which is also suitable for large scalable production.

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“…PVA has been widely used in membrane modification because of its high water absorption capability and electrical resistance [ 6 ]. However, PVA has low proton conductivity and thus phosphorylated PVA, which has a crosslinking structure, was often used, as it has relatively high proton conductivity and still has water retention ability [ 16 ]. El-Toony et al [ 17 ] cast a membrane of phosphorylated polyvinyl alcohol (p-PVA)/poly hydroxybutyrate (PHB) for PEMFCs using the gamma irradiation method for making p-PVA.…”

Section: Introductionmentioning

confidence: 99%

Modifying the Catalyst Layer Using Polyvinyl Alcohol for the Performance Improvement of Proton Exchange Membrane Fuel Cells under Low Humidity Operations

2020

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A proton exchange membrane fuel cell (PEMFC) system for the application of unmanned aerial vehicles is equipped without humidifiers and the cathode channels of the stack are open to the environment due to limited weight available for power sources. As a result, the PEMFC is operated under low humidity conditions, causing membrane dehydration, low performance, and degradation. To keep the generated water within the fuel cell to humidify the membrane, in this study, polyvinyl alcohol (PVA) is employed in the fabrication of membrane electrode assemblies (MEAs). The effect of PVA content, either sprayed on the gas diffusion layer (GDL) or mixed in the catalyst layer (CL), on the MEA performance is compared under various humidity conditions. The results show that MEA performance is increased with the addition of PVA either on the GDL or in the CL, especially for non-humidified anode conditions. The result suggested that 0.03% PVA in the anode CL and 0.1% PVA on the GDL can improve the MEA performance by approximately 30%, under conditions of a non-humidified anode and a room-temperature-humidified cathode. However, MEAs with PVA in the anode CL show better durability than those with PVA on the GDL according to measurement with electrochemical impedance spectroscopy.

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High electrically conductive polyaniline/partially phosphorylated poly(vinyl alcohol) composite films via aqueous dispersions

Cited by 18 publications

References 45 publications

Preparation, morphology, and conductivity of waterborne, nanostructured, cationic polyurethane/polypyrrole conductive coatings

Preparation, morphology, and conductivity of waterborne, nanostructured, cationic polyurethane/polypyrrole conductive coatings

Facile approach to fabricate waterborne polyaniline nanocomposites with environmental benignity and high physical properties

Modifying the Catalyst Layer Using Polyvinyl Alcohol for the Performance Improvement of Proton Exchange Membrane Fuel Cells under Low Humidity Operations

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