Novel quaternized polyvinyl alcohol/quaternized chitosan nano-composite as an effective hydroxide-conducting electrolyte

Liao, Guan–Ming; Yang, Chun‐Chen; Hu, Chien‐Chieh; Pai, Yu-Li; Lue, Shingjiang Jessie

doi:10.1016/j.memsci.2015.02.043

Cited by 99 publications

(84 citation statements)

References 65 publications

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“…Therefore, the QPVA nanocomposite membranes showed a semicrystalline structure with an XRD peak at 2θ of 20°, corresponding to the (101) plane of the PVA crystal structure [17,[53][54][55]. The nanocomposite membrane intensity decreased compared with pristine PVA, as described in our previous study [53], yet the QPVA composites retained good film structure [17,18,23]. This result implies that the addition of nanofiller to the polymeric matrix greatly suppressed the crystalline domains [18,23].…”

Section: Nanocomposite Membrane Characterizationsmentioning

confidence: 86%

“…The integrity of PVA material in alkaline solution and redox environment has been confirmed [14][15][16]. After being functionalized with ammonium groups, quaternized PVA (QPVA) membranes demonstrated high alkaline fuel cell performance and stable energy output for at least 280 h for direct alkaline methanol fuel cells (DAMFCs) [17,18].…”

Section: Introductionmentioning

confidence: 92%

“…The QPVA membrane had a quarterisation efficiency of 3-4% [10], and the other 96-97% of the polymeric matrix retained the PVA structure [53][54][55]. Therefore, the QPVA nanocomposite membranes showed a semicrystalline structure with an XRD peak at 2θ of 20°, corresponding to the (101) plane of the PVA crystal structure [17,[53][54][55]. The nanocomposite membrane intensity decreased compared with pristine PVA, as described in our previous study [53], yet the QPVA composites retained good film structure [17,18,23].…”

Section: Nanocomposite Membrane Characterizationsmentioning

confidence: 99%

“…Incorporating organic/inorganic nanofillers (e.g., chitosan, Al 2 O 3 , SiO 2 , TiO 2 , and Fe 3 O 4 ) into a PVA-based matrix has been shown to enhance chemical stability, physicochemical, and electrochemical properties for DAMFC applications [17,[19][20][21][22]. These nanocomposite membranes deliver noteworthy advantages over traditional pure polymeric membranes due to their higher ionic conductivity, suppressed permeability, and improved power densities [23,24].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

Kumar

et al. 2017

Energies

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Perovskite LaFeO 3 nanofillers (0.1%) are incorporated into a quaternized poly(vinyl alcohol) (QPVA) matrix for use as hydroxide-conducting membranes in direct alkaline methanol fuel cells (DAMFCs). The as-synthesized LaFeO 3 nanofillers are amorphous and functionalized with cetyltrimethylammonium bromide (CTAB) surfactant. The annealed LaFeO 3 nanofillers are crystalline without CTAB. The QPVA/CTAB-coated LaFeO 3 composite membrane shows a defect-free structure while the QPVA/annealed LaFeO 3 film has voids at the interfaces between the soft polymer and rigid nanofillers. The QPVA/CTAB-coated LaFeO 3 composite has lower methanol permeability and higher ionic conductivity than the pure QPVA and QPVA/annealed LaFeO 3 films. We suggest that the CTAB-coated LaFeO 3 provides three functions to the polymeric composite: increasing polymer free volume, ammonium group contributor, and plasticizer to enhance the interfacial compatibility. The composite containing CTAB-coated LaFeO 3 results in superior cell performance. A maximum power density of 272 mW cm −2 is achieved, which is among the highest power outputs reported for DAMFCs in the literature.

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Section: Nanocomposite Membrane Characterizationsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 92%

Section: Nanocomposite Membrane Characterizationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

Kumar

et al. 2017

Energies

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“…PVA is an inexpensive hydrophilic semicrystalline polymer. This polymer has excellent film forming properties and can produce effective electrolytes after doping with potassium hydroxide (KOH) solution [11]. During to the good properties of PVA, it was believed that it has ability to influence the sensing performance of chitosan film sensor.…”

Section: Introductionmentioning

confidence: 99%

Highly Response and Sensitivity Chitosan-Polyvinyl alcohol Based Hexanal Sensors

et al. 2016

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Abstract. This work is to study the sensing properties of chitosanpolyvinyl alcohol film sensors upon hexanal gas exposure using vapour sensing technique. The sensor fabrication process was done using electrochemical deposition method by deposit the sensing materials on the gold patterned electrode with chitosan/PVA. The response value of chitosan-PVA film sensors towards hexanal was taken as an output voltage using electrical testing method. In this study, 1.75% of chitosan with 5% of PVA were mixed with the ratio of (95:5) was tested upon exposure to hexanal gas. The concentration of the hexanal was varied as 10 ppm, 20 ppm, 30 ppm. It was found that the chitosan-PVA film sensors showed fast response, stable, good stability, good recovery, repeatable and good sensitivity towards hexanal exposure. The morphology of the pure chitosan and chitosan-PVA was analyzed by scanning electron microscope (SEM) and the interaction between chitosan and PVA was examined by Fourier Transform Infrared Spectroscopy (FTIR). The FTIR results indicate the changes in characteristics of the spectral peaks due to the formation of the intermolecular bonds between chitosan and PVA. The SEM morphology of the composites showed flat smooth surface that be a sign of uniform distribution of chitosan and PVA mixture throughout the films.

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Preparation and Application of the Composite from Chitosan

Chen

2017

Handbook of Composites From Renewable Materials

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Novel quaternized polyvinyl alcohol/quaternized chitosan nano-composite as an effective hydroxide-conducting electrolyte

Cited by 99 publications

References 65 publications

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

Highly Response and Sensitivity Chitosan-Polyvinyl alcohol Based Hexanal Sensors

Preparation and Application of the Composite from Chitosan

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