New Proton Conductive Membranes Based on Acid-doped Interpenetrating Polymer Networks

Loureiro, Felipe Augusto Moro; Pereira, Robson Pacheco; Rocco, Ana Maria

doi:10.1149/04523.0011ecst

Cited by 3 publications

(3 citation statements)

References 10 publications

(14 reference statements)

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“…Second IUPAC definition, while an interpenetrating polymer network (IPN) is "A polymer comprising two or more networks which are at least partially interlaced on a molecular scale, but not covalently bonded to each other and cannot be separated unless chemical bonds are broken(...)", a SIPN (Semi-IPN) is "A polymer comprising one or more polymer networks and one or more linear or branched polymers characterized by the penetration on a molecular scale of at least one of the networks by at least some of the linear or branched macromolecules(...)". [5] In this work, the SIPN was formed by the reaction of diglycidyl ether of bisphenol A (DGEBA) with curing agent 4,4' diaminodiphenyl-sulphone (DDS) and the linear polymer polyethyleneimine (PEI), as previously described [6]. kept in a dissector under vacuum prior to the spectroscopic and thermal analyses.…”

Section: Introductionmentioning

confidence: 99%

SIPN Systems Used as Membranes for Fuel Cell

Loureiro

Rocco²

2015

ECS Trans.

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Membranes must show chemical, electrochemical and dimensional stability and proton conductivity for application as a Polymer Electrolyte Membrane in Fuel Cells. The Semi-interpenetrating polymer network membranes (SIPN) obtained in this work were synthesized from polyethyleneimine and diglycidyl ether of bisphenol A with curing agent 4,4' diaminodiphenyl-sulphone. The membranes were studied while immersed in H3PO4 and after sulfonation. The samples were characterized by FTIR, TGA, DSC and electrochemical Impedance Spectroscopy (EIS). The SIPN membranes show high thermal stability above 270oC, which is sufficient for their application in PEMFC for intermediate temperature operation. The membrane doped with 20% H3PO4 shows higher conductivity value, 0,08 S.cm-1, than the sulfonated samples,10-2 Scm-1.

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Section: Introductionmentioning

confidence: 99%

SIPN Systems Used as Membranes for Fuel Cell

Loureiro

Rocco²

2015

ECS Trans.

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“…In the present work, a SIPN formed by the reaction of diglycidyl ether of bisphenol-A (DGEBA) with curing agent 4,4' diaminodiphenyl-sulphone (DDS) and the linear polymer polyethyleneimine (PEI) was studied, aiming its future application as membrane in PEMFC devices (5).…”

Section: Introductionmentioning

confidence: 99%

Polyethyleneimine-Based Semi-Interpenetrating Network Membranes for Fuel Cells

Loureiro¹,

Pereira²,

Rocco³

2013

ECS Trans.

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In the present work, Semi-interpenetrating polymer networks (SIPN) based on polyethyleneimine (PEI) were synthesized and characterized, aiming their future application in fuel cell devices. The membranes were acidified by two methods: (i) absorption of H 3 PO 4 from aqueous solutions and (ii) sulfonation, forming covalently bonded -SO 3 H. The thermal stability exhibited by the SIPN membranes, above 270 o C, is sufficient for their application in PEMFC and the membranes doped with H 3 PO 4 at 20% show higher conductivity values (of about 0.08 Ω -1 cm -1 ) than those obtained for the best sulfonated sample (10 -3 Ω -1 cm -1 ).

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“…In this work, the SIPN was formed by the reaction of diglycidyl ether of bisphenol A (DGEBA) with curing agent 4,4' diaminodiphenyl-sulphone (DDS) and the linear polymer polyethyleneimine (PEI), as described previously [5].…”

mentioning

confidence: 99%