Fabrication and characterization of phosphoric acid doped imidazolium ionic liquid polymer composite membranes

Che, Quantong; Zhou, Lu; Wang, Jilin

doi:10.1016/j.molliq.2015.01.054

Cited by 53 publications

(14 citation statements)

References 56 publications

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“…This is possibly due to PVDF-HFP lack of attention in the preparation of polymer/ionic liquid blends. On top of that, the blending process between the ionic liquids and PVDF can be conducted via solution blending in polar aprotic solvents, such as dimethylformamide [8,9], dimethylacetamide [23], and 1-methyl-2-pyrrolidone [27]. In addition, PVDF can also be blended with the ionic liquids through solventless ways, namely liquid impregnation and melt blending.…”

Section: Hydrophobic Imidazolium-based Ionic Liquid Abbreviationmentioning

confidence: 99%

A Succinct Review on the PVDF/Imidazolium-Based Ionic Liquid Blends and Composites: Preparations, Properties, and Applications

2021

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Poly(vinylidene fluoride) (PVDF) is a versatile thermoplastic fluoropolymer with intriguing characteristics, which is receiving considerable attention from researchers in many areas. Recently, PVDF and its copolymer, such as poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) have been blended with ionic liquids to produce blend and composite materials for target applications. In this succinct review, two types of ionic liquids that are utilized for the preparation of PVDF and PVDF-HFP blends and composites, namely, hydrophilic and hydrophobic imidazolium-based ionic liquids, are reviewed. In addition, the effect of the ionic liquids on the physicochemical properties of the PVDF and PVDF-HFP blends and composites, is described as well. On top of that, a multitude of applications of the blends and composites are also succinctly reviewed. This review may give inspirations to the polymer blend and composite researchers in diversifying the applications of thermoplastic fluoropolymers through the utilization of ionic liquids.

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Section: Hydrophobic Imidazolium-based Ionic Liquid Abbreviationmentioning

confidence: 99%

A Succinct Review on the PVDF/Imidazolium-Based Ionic Liquid Blends and Composites: Preparations, Properties, and Applications

2021

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“…Phosphoric acid (PA) doped imidazolium ionic liquid polymer composite membranes were fabricated by immersing the membranes based on imidazolium ionic liquid and polymers of SPEEK or polyvinylidenefluoride (PVDF) into pure phosphoric acid at room temperature [44]. Imidazolium ionic liquids of 1-butyl-3methylimidazolium hexafluorophosphate (BMIMPF6) or 1butyl-3-methylimidazolium dihydrogenphosphate (BMIMH2PO4) link phosphoric acid molecules to polymer matrix.…”

Section: Modification Of Speek Membranes With Other Inorganic Materialsmentioning

confidence: 99%

Review on Modification of Sulfonated Poly (-ether-ether-ketone) Membranes Used as Proton Exchange Membranes

Xiao-min¹,

Liu²,

Li³

2015

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The proton exchange membrane fuel cell (PEMFC) is a type of modern power, but the traditional proton exchange membranes (PEM) of PEMFC are limited by high methanol permeability and water uptake. Poly-ether-ether-ketone (PEEK) is a widely used thermoplastic with good cost-effective property. Sulfonated poly (-ether-ether-ketone) (SPEEK) has high electric conductivity and low methanol permeability, as well as comprehensive property, which is expected to be used as PEMs. However, the proton exchange ability, methanol resistance, mechanical property and thermal stability of SPEEK are closely related to the degree of sulfonation (DS) of SPEEK membranes. Additionally, the proton conductivity, methanol permeability, and stability of SPEEK membranes applied in various conditions need to be further improved. In this paper, the research into modification of SPEEK membranes made by SPEEK and other polymers, inorganic materials are introduced. The properties and modification situation of the SPEEK and the composite membranes, as well as the advantages and disadvantages of membranes prepared by different materials are summarized. From the results we know that, the methanol permeability of SPEEK/PES-C membranes is within the order of magnitude, 10-7 cm 2 /s. The proton conductivity of the SPPESK/SPEEK blend membrane reaches 0.212 S cm-1 at 80 °C. The cross-linked SPEEK membranes have raised thermal and dimensional stability. The non-solvent caused aggregation of the SPEEK ionomers. The proton conductivity of SPEEK/50%BMIMPF6/4.6PA membrane maintains stable as 2.0 x 10-2 S cm-1 after 600 h at 160 °C. Incorporation of aligned CNT into SPEEK increases the proton conductivity and reduces the methanol permeability of the composite membranes. The PANI improves the hydrothermal stability. More proton transfer sites lead to a more compact structure in the composite membranes. According to the results, the proton exchange capacity, water uptake, and conductivity of the SPEEK membranes are closely related to the structure, stability, mechanical and electrochemical property and methanol permeation of the PEMFC. The modification of SPEEK membranes will improve their applications in aviation, military and other industries. Some proposals for further research are put forward.

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“…[45][46][47][48][49][50][51] However, the conductivity was still lower than that of humidied Naon membranes, probably because the ability to retain Pa in the membrane was not high; substantially, merely the surface of the PBI membranes might be dissolved in Pa due to the rigidity of PBI. To overcome the above mentioned problems, some Pa-doped composite membranes composed of sulfonated PEEK [52][53][54] or ether bonds-incorporated PBI [55][56][57] have also been developed, which exhibit high anhydrous conductivities due to the higher Pa doping level.…”

Section: Introductionmentioning

confidence: 99%

Acidity effects of medium fluids on anhydrous proton conductivity of acid-swollen block polymer electrolyte membranes

et al. 2021

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Fabrication and characterization of phosphoric acid doped imidazolium ionic liquid polymer composite membranes

Cited by 53 publications

References 56 publications

A Succinct Review on the PVDF/Imidazolium-Based Ionic Liquid Blends and Composites: Preparations, Properties, and Applications

A Succinct Review on the PVDF/Imidazolium-Based Ionic Liquid Blends and Composites: Preparations, Properties, and Applications

Review on Modification of Sulfonated Poly (-ether-ether-ketone) Membranes Used as Proton Exchange Membranes

Acidity effects of medium fluids on anhydrous proton conductivity of acid-swollen block polymer electrolyte membranes

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