Membranas híbridas com potencial uso em células a combustível - parte 1: nanocompósitos de poli(eterimida) sulfonada

Gomes, Ana Catarina de Oliveira; Uieda, Beatriz; Tamashiro, Andre Akio; Filho, Adhemar C. Ruvolo; Pessan, Luiz Antônio; Paranhos, Caio Márcio

doi:10.1590/0104-1428.1131

Cited by 3 publications

(17 citation statements)

References 17 publications

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“…In previous works of our group [8,9] , the sulfonation of the PC was successfully obtained, despite of generating small difference between the various contents of sulfonation agent tested. In fact, the sulfonation reaction of substituted aromatic rings have several issues regarding the extension of reaction, reversibility, and main chain scission as reported [4,10,11] .…”

Section: Introductionmentioning

confidence: 87%

“…Meanwhile the sepiolite is a natural hydrated magnesium silicate with a significant number of silanol groups (Si-OH) present on the surface of the mineral [7] . More information about system components can be found in our previous publications [8,9] .…”

Section: Introductionmentioning

confidence: 99%

“…Previous results [8,9] showed great potential of these nanocomposites for use as solid electrolyte and the present study aimed to test its preparation in real processing conditions in which the incorporation of the clay mineral was carried out by mixing in the molten state, using a twin screw extruder and the molding was carried out by film extrusion. The goal was to achieve an appropriate balance among processing-structure-property for an optimized performance of the resulting membranes and to verify the possibility of industrial scale production, adapting the method of production of the membranes to the currently available technological park.…”

Section: Introductionmentioning

confidence: 99%

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Hybrids membranes with potential for fuel cells – Part 3: extruded films of nanocomposites based on sepiolite and PC/sulfonated PC blends

et al. 2018

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Fuel Cells based in polymers are an alternative for the conventional energetic matrices. However, materials currently available still present disadvantages to overcome. Membranes of polycarbonate (PC)/sulfonated polycarbonate (PCs) blend/sepiolite nanocomposites have previously been studied by the authors, resulting in good mechanical properties and promising properties of vapor transmission and ionic migration resistance. However, their production in large scale is still a challenge. The aim of this work was the development further the formulation and processing of the previously studied material. Films of PC/PCs blends (50/50 wt%) with different content of sepiolite clay, with and without chemical modification, have been prepared in an extruder and evaluated by FTIR, XRD, DSC, TGA, DMA, tension strength and water vapor transmission (WVT). Even after two processing steps, the blend-based nanocomposites keep good thermal and mechanical properties. However, changes in WVT were observed with respect to data obtained in previous studies.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrids membranes with potential for fuel cells – Part 3: extruded films of nanocomposites based on sepiolite and PC/sulfonated PC blends

et al. 2018

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“…One of the key elements to the structure of the fuel cells is the polymer membrane which plays a crucial role in advancing this technology further. In Brazil through Ministry of Mines and Energy was created the National energy plan and has a target to be reached until 2030 to implement the hydrogen-based fuel cells [1].…”

Section: Introductionmentioning

confidence: 99%

“…The hydrogen fuel cells or direct injection of methanol have shown great versatility. For the feasibility of using fuel cells, materials with specific characteristics should be studied for hydrogen purification processes, the proton conduction and membrane-electrode interface [1].…”

Section: Introductionmentioning

confidence: 99%

Synthesis And Characterisation Of Polyaniline (PAni) Membranes For Fuel Cell

Amado¹

2016

Adv. Mater. Lett.

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Over the past decade or so, alternative energy plays a pivotal role in addressing challenges posed by nature. Polymer electrolyte membrane fuel cell is one of the promising alternative energy and there has been significant research and technological investments done in this field. The key information and future prospective of the field is energy conversion and storage, both of which are essential in order to meet the challenges of global warming and the limited fossil fuel supply. However, polymer membrane in particular plays a crucial role in advancing this technology further. The utilization of conducting polymers in manufacturing membranes combining their electrochemical properties along with mechanical properties is of primary importance to enhance the efficiency of this system. In the present study blends of high impact polystyrene (HIPS) and polyaniline (PAni) were obtained with the aim of producing membranes for fuel cell. HIPS and PAni were dissolved in tetrachloroethylene, a common solvent for both materials. After dissolution, PAni was dispersed in an HIPS polymeric matrix. The membranes were molded on to glass plates using a laminator to keep thickness constant, and the solvent evaporated slowly for 24 h under room temperature. The amount of polyaniline used was 10 and 20 % weight. The electronic and structural properties were carried out using X-ray photoelectron spectroscopy (XPS), Thermogravimetric Analysis (TGA) Raman spectroscopy, Scanning electronic microscopic (SEM). The analysis indicate that PAni incorporation and its dispersion into the polymeric matrix modifies the membranes properties and show improvement in efficiency.

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Post‐polymerization modification of polyetherimide by Friedel‐Crafts acylation: Physical–chemical characterization and performance as gas separation membrane

Ferreira

Ambrosi

Conceição

2022

J of Applied Polymer Sci

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Despite recent interest in post-polymerization modification, high-performance aromatic polymers have not received much attention as a suitable platform for the synthesis of new polymer libraries. In this article, we describe the postpolymerization modification of a polyetherimide, employing Friedel-Crafts acylation, resulting in derivatives with varied side groups and degrees of acylation. It is shown that by increasing the degree of acylation and the size of the acyl group the glass transition temperature decreases, following a linear relation, while the thermal stability is not significantly affected, and the water contact angle of the derivative membranes increases. Gas permeability tests demonstrated an increase in the permeability of the derivative membranes to N 2 and CO 2 as the degree of acylation increases. The results demonstrated the potential of the post-polymerization Friedel-Crafts acylation of highperformance aromatic polymers to obtain new and efficient membranes for gas separation.

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Membranas híbridas com potencial uso em células a combustível - parte 1: nanocompósitos de poli(eterimida) sulfonada

Cited by 3 publications

References 17 publications

Hybrids membranes with potential for fuel cells – Part 3: extruded films of nanocomposites based on sepiolite and PC/sulfonated PC blends

Hybrids membranes with potential for fuel cells – Part 3: extruded films of nanocomposites based on sepiolite and PC/sulfonated PC blends

Synthesis And Characterisation Of Polyaniline (PAni) Membranes For Fuel Cell

Post‐polymerization modification of polyetherimide by Friedel‐Crafts acylation: Physical–chemical characterization and performance as gas separation membrane

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