scholarly journals Study of High Performance Sulfonated Polyether Ether Ketone Composite Electrolyte Membranes

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1177 ◽  
Author(s):  
Gwomei Wu ◽  
Sheng-Jen Lin ◽  
I-Chan Hsu ◽  
Juin-Yih Su ◽  
Dave W. Chen
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Ionic Conductivity ◽  
High Performance ◽  
Composite Membranes ◽  
Methanol Permeability ◽  
Composite Electrolyte ◽  
Polyether Ether Ketone ◽  
Electrolyte Membranes ◽  
Ether Ketone

In this study, high performance composite electrolyte membranes were prepared from polyether ether ketone polymeric material. An initial sulfonation reaction improved the membrane hydrophilicity and its water absorbability and thus enhanced the ionic conductivity in electrochemical cells. Protonic conductivity was improved from 10−4 to 10−2 S cm−1 with an increasing sulfonation time from 72 to 175 h. The effects of blending nano SiO2 into the composite membranes were devoted to improve thermal and mechanical properties, as well as methanol permeability. Methanol permeability was reduced to 3.1 × 10−7 cm2 s−1. Finally, a further improvement in ionic conductivity was carried out by a supercritical carbon dioxide treatment under 20 MPa at 40°C for 30 min with an optimum SiO2 blend ratio of 10 wt-%. The plasticizing effect by the Lewis acid-base interaction between CO2 and electron donor species on polymer chains decreased the glass transition and melting temperatures. The results show that sulfonated composite membranes blended with SiO2 and using a supercritical carbon dioxide treatment exhibit a lower glass transition temperature, higher ionic conductivity, lower methanol permeability, good thermal stability, and strong mechanical properties. Ionic conductivity was improved to 1.55 × 10−2 S cm−1. The ion exchange capacity and the degree of sulfonation were also investigated.

Studying Mechanical Properties Specially Fatigue Behavior of (Polyether Ether Ketone)/Glass Fiber Composites in Aerospace Applications

2014 ◽  
Vol 666 ◽  
pp. 8-16
Author(s):  
A. Saad Najim ◽  
Mohammed Adwaa
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
High Performance ◽  
Fatigue Behavior ◽  
Fatigue Properties ◽  
Glass Fiber Composites ◽  
Aerospace Applications ◽  
Polyether Ether Ketone ◽  
High Performance Composite ◽  
Ether Ketone

This work deals with studying the mechanical properties specially fatigue behavior for high performance composite materials of poly ether ether ketone (PEEK)/glass fiber, which are used in Aircraft Industry. Two materials have been used: (PEEK natural) and (PEEK+30% glass fiber).To identify the type of (PEEK), infrared (FTIR) test has been conducted. X-ray test has been used to measure the (PEEK) crystalline ,also the tensile properties, impact strength and the fatigue test are performed.The results show that FTIR test peaks are for standard PEEK polymer and that GFRP increases the crystalline of (PEEK) material , while the tensile , impact and fatigue properties of (PEEK) decreases by adding GF to PEEK .

scholarly journals Pengaruh aditif terhadap karakteristik membran elektrolit polieter-eter keton tersulfonasi untuk aplikasi sel bahan bakar metanol langsung

2018 ◽  
Vol 6 (1) ◽  
pp. 563
Author(s):  
Sri Handayani ◽  
Eniya Listiani Dewi ◽  
Widodo Wahyu Purwanto ◽  
Roekmijati W. Soemantojo
Keyword(s):  
Fuel Cell ◽  
Ionic Conductivity ◽  
Direct Methanol Fuel Cell ◽  
Methanol Permeability ◽  
Electrolyte Membrane ◽  
Polyether Ether Ketone ◽  
Sulfonated Polyether Ether Ketone ◽  
Direct Methanol ◽  
Ether Ketone ◽  
Methanol Fuel Cell

The influence of the additive on the characteristics of the sulfonated polyether-ether ketone electrolyte membrane for direct methanol fuel cell applicationsThe weakness of comercial membrane (Nafion-117) for the application of direct methanol fuel cell is highly methanol cross-over. It is decreasing the cell voltage. To minimize the methanol cross-over in a membrane, there are two methods can beproposed: the modification of conventional membrane structure (Nafion-117) and development of novel electrolyte membrane (and modified). PEEK can be used as one of alternatives for  direct methanol fuel cell membranes. This PEEK polymer has the stability of chemistry mechanic and thermal. In order to increase ionic conductivity and to decrease methanol permeability. It is necessary to make the modification of sulfonated polyether-ether ketone (sPEEK) with adding higroscopic inorganic additives (SiO2 and  H-zeolit). The type of additive which can increase ionic conductivity for sPEEK membrane is SiO2 (3 wt.%) 2 times, and decrease ionic conductivity 1,7 times for H-zeolite. Methanol permeability of membrane sPEEK with silica added increase 5 times and H-zeolite 2 times compared to sPEEK membrane without additive. Although composite membrane have increasing methanol permeability but that values are still lower than Nafion-117. Conclusion, the addition of SiO2 as additives has given best performance 0,09 S/cm ionic conductivity, 10-7 cm2/S methanol permeability dan 17 wt.% water swelling.Keywords: Additive, Direct Methanol Fuel Cell, Polyether-Ether Ketone, SiO2, H-ZeoliteAbstrakKelemahan membran komersial (Nafion-117) untuk aplikasi sel bahan bakar metanol langsung (direct methanol fuel cell) adalah methanol crossover yang tinggi, hal tersebut yang dapat menurunkan kinerja voltase sel secara keseluruhan. Dalam rangka mengurangi methanol crossover melalui membran, ada dua pendekatan yaitu modifikasi struktur membran konvensional (Nafion) atau pengembangan membran polimer elektrolit (dan modifikasi). Salah satu polimer aromatik yang menarik perhatian sebagai membran elektrolit pada aplikasi DMFC adalah polieter-eter keton (PEEK) karena polimer tersebut mempunyai kestabilan kimia, mekanik dan panas. Agar dapat meningkatkan konduktivitas ionik dan menurunkan permeabilitas metanol dilakukan modifikasi pada polieter-eter keton tersulfonasi (sPEEK) yaitu dengan menambahkan aditif anorganik yang bersifat higroskopik (SiO2 dan H-zeolit) Jenis aditif yang dapat meningkatkan konduktivitas ionik untuk membran elektrolit adalah SiO2 (3% berat) yaitu  sebesar 2 kali, sedangkan H-zeolit menurunkan konduktivitas ionik sebesar 1,7 kali. Permeabilitas metanol membran sPEEK yang ditambahkan SiO2 naik hingga 5x sedangkan yang ditambahkan H-zeolit hanya 2 kali dari membran sPEEK tanpa aditif. Walaupun membran komposit meningkatkan permeabilitas metanol tetapi nilai tersebut masih dibawah membran Nafion-117. Jadi penambahan aditif yang baik dalam membran berbasis polieter-eter keton tersulfonasi adalah SiO2 yang mempunyai konduktivitas ionik 0,09 S/cm, permeabilitas metanol 10-7 cm2/S dan swelling air 17%.Kata kunci : Aditif, Polieter-Eter Keton, Sci Bahan Bakar Metanol Langsung, SiO,, H-Zeolit

Performances of Sulfonated Polyether Ether Ketone Composite Membranes for Fuel Cell Applications

2015 ◽  
Vol 14 (01n02) ◽  
pp. 1460016 ◽  
Author(s):  
Jun Ma ◽  
Dongyun Su ◽  
Hongjun Ni ◽  
Mingyu Huang ◽  
Xingxing Wang
Keyword(s):  
Fuel Cell ◽  
Composite Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Methanol Permeability ◽  
Ion Exchange Capacity ◽  
Polyether Ether Ketone ◽  
Fuel Cell Application ◽  
Sulfonated Polyether Ether Ketone ◽  
Ether Ketone

A variety of modification approaches such as cross-linking and nano blending have been explored to prepare efficient membranes based on Sulfonated polyether ether ketone (SPEEK). The addition filler is also one of the most widely used approaches to modify the SPEEK. The crosslinked membranes were utilized as proton exchange membranes (PEM) for fuel cell application. The performances of these composite membranes were comparative researched in terms of water uptake, ion exchange capacity, proton conductivity, and methanol permeability.While the nanohybrid membranes display remarkably enhanced proton conduction property due to the incorporation of additional sites for proton transport and the formation of well-connected channels by bridging the hydrophilic domains in SPEEK matrix. The as-prepared nanohybrid membranes also show elevated thermal and mechanical stabilities as well as decreased methanol permeability.

Application of polysulfone (PSf)– and polyether ether ketone (PEEK)–tungstophosphoric acid (TPA) composite membranes for water electrolysis

2008 ◽  
Vol 322 (1) ◽  
pp. 154-161 ◽  
Author(s):  
In-Young Jang ◽  
Oh-Hwan Kweon ◽  
Kyoung-Eon Kim ◽  
Gab-Jin Hwang ◽  
Sang-Bong Moon ◽  
...  
Keyword(s):  
Water Electrolysis ◽  
Composite Membranes ◽  
Tungstophosphoric Acid ◽  
Polyether Ether Ketone ◽  
Ether Ketone

Mechanical Properties of Solution-Blended Graphene Nanoplatelets/Polyether-Ether-Ketone Nanocomposites

2021 ◽  
Vol 125 (37) ◽  
pp. 10597-10609
Author(s):  
Ke Zhang ◽  
Xiaozhuang Yuan ◽  
Dongyu Li ◽  
Juan Du ◽  
Bo Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Nanoplatelets ◽  
Polyether Ether Ketone ◽  
Ether Ketone

scholarly journals Effects of Thermal Cycle and Ultraviolet Radiation on 3D Printed Carbon Fiber/Polyether Ether Ketone Ablator

Aerospace ◽  
2020 ◽  
Vol 7 (7) ◽  
pp. 95
Author(s):  
Farhan Abdullah ◽  
Kei-ichi Okuyama ◽  
Akito Morimitsu ◽  
Naofumi Yamagata
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Uv Radiation ◽  
Thermal Cycle ◽  
Temperature Behavior ◽  
Heat Shield ◽  
Polyether Ether Ketone ◽  
Peek Composite ◽  
3D Printed ◽  
Ether Ketone

The extreme heating environment during re-entry requires an efficient heat shield to protect a spacecraft. The current method of manufacturing a heat shield is labor intensive. The application of 3D printing can reduce cost and manufacturing time and improve the quality of a heat shield. A 3D printed carbon fiber/polyether ether ketone (CF/PEEK) composite was proposed as a heat shield material. The aim was to develop a heat shield and the structural member as a single structure while maintaining the necessary recession resistance. Test samples were exposed to thermal cycles and ultraviolet (UV) radiation environment. Subsequently, a tensile test was performed to evaluate the effect of thermal cycle and UV radiation on the mechanical properties. The sample’s recession performance and temperature behavior were evaluated using an arc heated wind tunnel. Exposure to thermal cycle and UV radiation have limited effect on the mechanical properties, recession behavior and temperature behavior of 3D CF/PEEK. Results from the arc heating test showed an expansion of the sample surface and better recession resistance than other existing ablator materials. Overall, 3D CF/PEEK has excellent recession resistance while maintaining mechanical properties when exposed to high temperature, thermal cycle and UV radiation.

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO2 composite membranes with low methanol permeability for direct methanol fuel cells

2020 ◽  
pp. 095400832095804
Author(s):  
Chengyun Yuan ◽  
Yinghan Wang
Keyword(s):  
Sulfonic Acid ◽  
Direct Methanol Fuel Cells ◽  
Composite Membranes ◽  
Methanol Permeability ◽  
Aryl Ether ◽  
Direct Methanol ◽  
Aryl Ether Ketone ◽  
Ether Ketone ◽  
Sulfonic Acid Groups ◽  
Sulfonated Poly

A sulfonated poly(aryl ether ketone sulfone) (SPAEKS) with locally dense sulfonic acid groups is synthesized and different amounts of TiO2 is doped into SPAEKS matrix to prepare composite membranes (SPAEKS/TiO2-x). SEM shows that TiO2 in the composite membranes has good dispersibility when TiO2 content is not higher than 3%. The composite membranes show good mechanical properties, dimensional stability and oxidative stability. The proton conductivity of composite membranes is near to that of Nafion 117 membrane and methanol permeability of composite membranes is much lower than that of Nafion 117 membrane. Therefore, the proton selectivity of composite membranes is higher than that of Nafion 117 membrane. In particular, proton selectivity of SPAEKS/TiO2-3% (12.8 × 104 S s cm−3) is four times higher than that of Nafion 117 membrane (3.2 × 104 S s cm−3).

Effects of potassium titanate whisker and glass fiber on tribological and mechanical properties of PTFE/PEEK blend

2017 ◽  
Vol 30 (6) ◽  
pp. 752-764 ◽  
Author(s):  
Xue Teng ◽  
Lefei Wen ◽  
Yunxia Lv ◽  
Wenge Tang ◽  
Xiaogang Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Glass Fiber ◽  
Tribological Properties ◽  
Reinforcing Effect ◽  
Potassium Titanate ◽  
Polyether Ether Ketone ◽  
Ether Ketone

Two series of 10% polytetrafluoroethylene (PTFE)/polyether ether ketone (PEEK) composites reinforced with potassium titanate whisker (PTW/PTFE/PEEK) and chopped glass fiber (GF/PTFE/PEEK) were prepared and characterized. We investigated the effects of the additives on thermal stability, tribological properties, mechanical properties, and rheological behavior. The results illustrated that the mechanical properties of 10% PTFE/PEEK blend can be dramatically improved by incorporating either PTW or GF; however, the reinforcing effect of GF was found to be superior. It was found that 1% additive resulted in blends with the best tribological properties. Compared to the unmodified blend, the friction coefficient and wear rate of the 1% PTW blend decreased by 7.2% and 21%, respectively, while the corresponding values of 1% GF blend decreased by 0.66% and 51%, respectively.

scholarly journals Composite Sulfonated Polyether-Ether Ketone Membranes with SBA-15 for Electrochemical Energy Systems

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1570 ◽  
Author(s):  
A. Rico-Zavala ◽  
J. L. Pineda-Delgado ◽  
A. Carbone ◽  
A. Saccà ◽  
E. Passalacqua ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Proton Exchange Membrane ◽  
Energy Systems ◽  
Composite Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Inorganic Materials ◽  
Methanol Permeability ◽  
Ether Ketone ◽  
Electrochemical Energy

The aim of this work is the evaluation of a Sulfonated Poly Ether-Ether Ketone (S-PEEK) polymer modified by the addition of pure Santa Barbara Amorphous-15 (SBA-15, mesoporous silica) and SBA-15 previously impregnated with phosphotungstic acid (PWA) fillers (PWA/SBA-15) in order to prepare composite membranes as an alternative to conventional Nafion® membranes. This component is intended to be used as an electrolyte in electrochemical energy systems such as hydrogen and methanol Proton Exchange Membrane Fuel Cell (PEMFC) and Electrochemical Hydrogen Pumping (EHP). The common requirements for all the applications are high proton conductivity, thermomechanical stability, and fuel and oxidant impermeability. The morphology of the composite membranes was investigated by Scanning Electron Microscopy- Energy Dispersive X-ray Spectroscopy (SEM-EDS) analysis. Water Uptake (Wup), Ion Exchange Capacity (IEC), proton conductivity, methanol permeability and other physicochemical properties were evaluated. In PEMFC tests, the S-PEEK membrane with a 10 wt.% SBA-15 loading showed the highest performance. For EHP, the inclusion of inorganic materials led to a back-diffusion, limiting the compression capacity. Concerning methanol permeability, the lowest methanol crossover corresponded to the composites containing 5 wt.% and 10 wt.% SBA-15.

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