Porous diffusion dialysis membranes for rapid acid recovery

Lin, Xiaocheng; Shamsaei, Ezzatollah; Kong, Biao; Liu, Jefferson Zhe; Hu, Yaoxin; Xu, Tongwen; Wang, Huanting

doi:10.1016/j.memsci.2015.12.027

Cited by 61 publications

(30 citation statements)

References 34 publications

(38 reference statements)

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“…In the last stage above 450 °C, the main polymer degraded, which was similar to the PFAE copolymers. The thermal stability of the QPFAE membranes is similar to other reported benzyltrimethyl quaternary ammonium type AEMs . The QPFAE membranes have sufficient thermal stability for general fuel cell operation at 80–100 °C.…”

Section: Resultssupporting

confidence: 54%

Stable anion exchange membranes derived from fluorinated poly(aryl ethers) with quaternized fluorene units for fuel cell applications

Gao

Pan

Buregeya

et al. 2018

J of Applied Polymer Sci

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A series of fluorinated poly(aryl ethers) containing benzyltrimethyl quaternary ammonium functionalized fluorene units (QPFAE) are synthesized via condensation polymerization, chloromethylation, and quaternization. Ionomer structure and the ion exchange capacity are confirmed by 1 H-nuclear magnetic resonance spectroscopy. Other characterization techniques such as Fourier transform infrared spectroscopy, atomic force microscopy, thermogravimetric analysis, gel permeation chromatography, electrochemical impedance spectroscopy, Fenton, water-swelling, and hydrolytic aging tests are used to evaluate the physicochemical properties of the as-prepared QPFAE membranes. For the QPFAE membranes with ion exchange capacity of 0.95-1.94 mmol/g, they displayed low water uptake and methanol permeability (4.59-26.1 3 10 28 cm 2 /s at 25 8C), fairly good dimensional stability, high mechanical toughness, as well as fine thermal-oxidative-hydrolytic stability and ion conductivity at least 10 mS/cm. The membranes also showed clear hydrophilic/hydrophobic phase-separation morphology. Furthermore, the QPFAE membranes could endure harsh basic conditions (1-4 mol/L NaOH solution) at 60 and 80 8C at least 240 h, keeping rather high mechanical toughness and ion conduction capability during the aging test.

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Section: Resultssupporting

confidence: 54%

Stable anion exchange membranes derived from fluorinated poly(aryl ethers) with quaternized fluorene units for fuel cell applications

Gao

Pan

Buregeya

et al. 2018

J of Applied Polymer Sci

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“…4(B) clearly shows that nitrogen is View Article Online present in the quaternary state. 48 Interestingly, this peak was absent in the parent unmodied BPPO membrane. This showed that the tertiary nitrogen atom present in the TESPTEC backbone had reacted with the -CH 2 Br group in BPPO to form a quaternized nitrogen in the NVC-50 membrane.…”

Section: Xps Analysismentioning

confidence: 97%

Preparation and characterization of click-driven N-vinylcarbazole-based anion exchange membranes with improved water uptake for fuel cells

Mondal

et al. 2017

RSC Adv.

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“…As explained in a previous literature review, the high flux of anion exchange membranes can be obtained by increasing the water uptake and introducing macro-pores [4]. However, high selectivity requires appropriate ion exchange capacity (IEC 1) ) and pore structures [16][17][18]. Meanwhile, for commercial pur-poses, high dimensional stability, i.e., low water uptake, and excellent acid stability are also desired.…”

Section: Introductionmentioning

confidence: 99%

Branched Polyvinyl Alcohol Hybrid Membrane for Acid Recovery via Diffusion Dialysis

Cheng

et al. 2019

Chem Eng & Technol

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A branched polymer was prepared by grafting allyltrimethylammonium chloride onto polyvinyl alcohol (PVA) via free-radical polymerization. Afterwards, a series of hybrid membranes were prepared by sol-gel cross-linking between quaternary ammonium-PVA and tetraethoxysilane. The obtained membranes were characterized in terms of infrared spectroscopy, ion exchange capacity, water uptake, linear expansion ratio, and acid resistance. The thermal properties of the membranes were investigated as well. The diffusion dialysis performances of the membranes were tested by using a simulated feed solution containing HCl and FeCl 2 . The diffusion dialysis coefficients and the separation factors were much better than those of the commercial DF-120 membrane.

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Porous diffusion dialysis membranes for rapid acid recovery

Cited by 61 publications

References 34 publications

Stable anion exchange membranes derived from fluorinated poly(aryl ethers) with quaternized fluorene units for fuel cell applications

Stable anion exchange membranes derived from fluorinated poly(aryl ethers) with quaternized fluorene units for fuel cell applications

Preparation and characterization of click-driven N-vinylcarbazole-based anion exchange membranes with improved water uptake for fuel cells

Branched Polyvinyl Alcohol Hybrid Membrane for Acid Recovery via Diffusion Dialysis

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