scholarly journals Effect of Sulfonation Degree and PVDF Content on the Structure and Transport Properties of SPEEK/PVDF Blend Membranes

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 676
Author(s):  
Shaojian He ◽  
Shaoxiong Zhai ◽  
Chong Zhang ◽  
Yang Xue ◽  
Wei Yang ◽  
...  
Keyword(s):  
Transport Properties ◽  
Polyvinylidene Fluoride ◽  
Methanol Permeability ◽  
Miscible Blend ◽  
Ether Ether Ketone ◽  
Sulfonation Degree ◽  
Poly Ether Ether Ketone ◽  
Blend Membranes ◽  
Ether Ketone ◽  
Sulfonated Poly

Sulfonated poly (ether ether ketone) (SPEEK) with four different sulfonation degrees (SDs) were prepared, and mixed with polyvinylidene fluoride (PVDF) to prepare four series of SPEEK/PVDF blend membranes. The miscibility between SPEEK and PVDF was investigated by observing the micro-morphologies. The miscible blend membranes were found in the SPEEK/PVDF blend membranes in which either SPEEK had relatively low SD or consisted of low content of one component (either SPEEK or PVDF). The PVDF crystallinity was found to decrease in the SPEEK/PVDF membranes that had better blend miscibility. With the increase of PVDF content, all the blend membranes exhibited the decreased proton conductivity and methanol permeability, and the miscible blend membranes decreased more slowly than the immiscible ones.

Studies on Proton Conductivity and Methanol Permeability of Poly(ether sulfone)/Sulfonated Poly(ether ether ketone) Blend Membranes

2008 ◽  
Vol 1098 ◽  
Author(s):  
Hong Zhu ◽  
Wein-Duo Yang ◽  
Yong-sheng Wei ◽  
Wu-bin Yang ◽  
Xue-qing Yu ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Methanol Permeability ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Blend Membranes ◽  
Direct Methanol ◽  
Concentrated Sulfuric Acid ◽  
Ether Ketone ◽  
Methanol Fuel Cell ◽  
Sulfonated Poly

AbstractPartially Sulfonated Poly(ether ether ketone) (SPEEK) samples were prepared by modification of corresponding poly(ether ether ketone) (PEEK) with concentrated sulfuric acid. Poly(ether sulfone)(PES) was blended into SPEEK to prepare PES/SPEEK blend membranes by solution casting. The glass transition temperature of blend membranes indicated the molecular miscibility between PES and SPEEK. Characteristics of the blend membranes, including water uptake, thermal stability, methanol permeability, swelling degree, proton conductivity, etc, were investigated. PES played an important role in the blend membranes. Though the proton conductivity of PES/SPEEK blend membranes decreased to some extent, their performance for barrier methanol and swelling had remarkably enhanced, showing the feasibility for direct methanol fuel cell.

Fluorinated and sulfonated poly (ether ether ketone) and Matrimid blend membranes for CO 2 separation

2018 ◽  
Vol 203 ◽  
pp. 233-241 ◽  
Author(s):  
Hasham Asghar ◽  
Ayesha Ilyas ◽  
Zaman Tahir ◽  
Xianfeng Li ◽  
Asim Laeeq Khan
Keyword(s):  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Blend Membranes ◽  
Ether Ketone ◽  
Sulfonated Poly

scholarly journals High degree sulfonated poly(ether ether ketone) blend with polyvinylidene fluoride as a potential proton-conducting membrane fuel cell

2019 ◽  
Vol 32 (1) ◽  
pp. 103-115 ◽  
Author(s):  
Syarifah Noor Syakiylla Sayed Daud ◽  
Muhammad Noorul Anam Mohd Norddin ◽  
Juhana Jaafar ◽  
Rubita Sudirman
Keyword(s):  
Mechanical Properties ◽  
Fuel Cell ◽  
Polyvinylidene Fluoride ◽  
Proton Conducting ◽  
Proton Conducting Membrane ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Speek Membrane ◽  
Sulfonated Poly

Sulfonated poly(ether ether ketone) (sPEEK) membrane is a promising proton-conducting membrane for fuel cell. However, the performance and lifetime of sPEEK membrane depend on the degree of sulfonation (DS). High DS of sPEEK increases the performance, but the mechanical properties could deteriorate progressively which affect its lifetime. Thus, this study investigated the effect of adding polyvinylidene fluoride (PVDF) into high DS (80%) of sPEEK through solution blending method toward its physicochemical properties and morphology structures. The PVDF concentration was varied to 5, 10, 15, and 20 wt% relative to the sPEEK content. The existence of hydrophobic PVDF in 80% sPEEK improved the mechanical properties where the water uptake and swelling degree of membrane decreased, whereas the tensile strength increased. The sPEEK/PVDF 15 exhibited the highest proton conductivity (46.23 mS cm−1) at 80°C. Incorporating PVDF into high DS of sPEEK enhanced the mechanical properties which can be used as a proton-conducting membrane for fuel cell that may improve the performance and prolong the lifetime of the cell.

A functional binder–sulfonated poly(ether ether ketone) for sulfur cathode of Li–S batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 77937-77943 ◽  
Author(s):  
Meng Cheng ◽  
Longyan Li ◽  
Yanxiao Chen ◽  
Xiaodong Guo ◽  
Benhe Zhong
Keyword(s):  
Polyvinylidene Fluoride ◽  
Homogeneous Reaction ◽  
Sulfur Cathode ◽  
Adhesion Ability ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Sulfonated Poly

Sulfonated poly(ether ether ketone) (SPEEK) with strong electronegativity and adhesion ability of S/C compounds was prepared by a homogeneous reaction as the binder for the sulfur cathode of Li–S batteries compared to the conventional polyvinylidene fluoride (PVDF) binder.

scholarly journals Effect of Temperature on Sulfonated Poly (Ether Ether Ketone) Blended with Charged Surface Modifying Macromolecule Membrane for DMFCs

2017 ◽  
Vol 14 (1) ◽  
Author(s):  
A. Mayahi ◽  
J. Jaafar ◽  
M. N. A. Mohd Norddin ◽  
H. Hassan
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Methanol Permeability ◽  
Charged Surface ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Direct Methanol ◽  
Ether Ketone ◽  
Methanol Fuel Cell ◽  
Sulfonated Poly

The purpose of this research was to determine the behavior of modified sulfonated poly (ether ether ketone) (SPEEK) with degree of sulfonation (DS) 68% blended by charged surface modifying macromolecule (cSMM) at different operating temperatures (room to 80°C) for direct methanol fuel cell application. The fabricated SPEEK (68)/cSMM membrane was compared with SPEEK (68) and Nafion112 membranes in terms of water uptake, proton conductivity, and methanol permeability at relatively high temperatures. The water uptake of SPEEK (68)/ cSMM was higher than that of SPEEK (68) and Nafion112 over the temperature ranges studied; however it was dissolved at 80°C. Proton conductivity of SPEEK (68)/cSMM showed improvement compared to SPEEK (68) at temperature range, but still lower than Nafion112, moreover methanol permeability behavior of fabricated membrane was lower at high temperatures as compared to that of SPEEK and Nafion112 and better overall performance was allocated to the fabricated membrane at 60°C.These results indicate that SPEEK (68)/cSMM membrane is promising to be used as a proton exchange membrane in direct methanol fuel cell.

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