Results 31 to 40 of about 1,473 (204)

A sulfonated modification of PEEK for ultralow friction

open access: yesFriction, 2022
Polyether ether ketone (PEEK) is a widely used material for friction pairs due to its excellent mechanical strength, good wear resistance, and chemical inertness.
Shihua Yuan, Chenhui Zhang
doaj   +1 more source

Ion exchange membranes based upon crosslinked sulfonated polyethersulfone for electrochemical applications [PDF]

open access: yes, 2013
Synthesis and characterization of new ion exchange membranes made from chlorosulfonated polyethersul- fone (SO2Cl-PES) crosslinked by polyaminated crosslinking reagents have been performed.
FAUVARQUE, J.F   +5 more
core   +6 more sources

Enhancement of Hybrid SPEEK Based Polymer–Cyclodextrin-Silica Inorganic Membrane for Direct Methanol Fuel Cell Application [PDF]

open access: yes, 2017
Direct methanol fuel cell (DMFC) is one of several types of fuel cells that use proton exchange membrane (PEM) as a liaison between the reaction at the cathode and anode.
Hadiyanto, H. (H)   +2 more
core   +1 more source

Proton conducting electrospun sulfonated polyether ether ketone graphene oxide composite membranes

open access: yesRSC Advances, 2017
A series of novel composite membranes, based on sulfonated poly(ether ketone) (SPEEK) with a graphene oxide (GO) layer, were prepared.
Jose Luis Reyes-Rodriguez   +5 more
openaire   +4 more sources

Crosslinked SPEEK membranes: Mechanical, thermal, and hydrothermal properties [PDF]

open access: yes, 2012
The thermal and mechanical behavior, the water uptake (WU), and water diffusion coefficient of sulfonated poly(ether ether ketone) (SPEEK)membranes annealed at 180 degrees C for different times were explored by high-resolution thermogravimetric analysis,
Chailan, J   +6 more
core   +3 more sources

Development of Cost-Effective sPEEK/Al2O3 Composite Membranes with Enhanced Proton Conductivity and Durability for PEMFCs [PDF]

open access: yesE3S Web of Conferences
Polymer electrolyte membrane (PEM)-based fuel cells are emerging fields with high efficiency, low pollutant emissions, and low material consumption. However, conventional membranes have poor thermal resistance and are expensive.
Hakim Muhammad Fahmi   +4 more
doaj   +1 more source

In situ analysis of hydration and ionic conductivity of sulfonated poly(ether ether ketone) thin films using an interdigitated electrode array and a nanobalance [PDF]

open access: yesJournal of Sensors and Sensor Systems, 2022
Proton-conducting polymers, such as sulfonated poly(ether ether ketone) (SPEEK), are of great industrial interest. Such proton exchange membranes show high tendencies for water and water vapor uptake. The incorporation of water not only leads to mass and
H. Wulfmeier   +4 more
doaj   +1 more source

Critical Evaluation of the Methods for the Characterization of the Degree of Sulfonation for Electron Beam Irradiated and Non-Irradiated Sulfonated Poly(ether ether ketone) Membranes [PDF]

open access: yes, 2023
Sulfonated poly(ether ether ketone) (SPEEK) materials are promising candidates for replacing Nafion™ in applications such as proton exchange membrane (PEM) and direct methanol fuel cells.
Avotina, Liga   +8 more
core   +1 more source

Preparation of high performance SPEEK/Cloisite 15A nanocomposite membrane via advanced membrane formulation method [PDF]

open access: yes, 2014
Sulfonated poly (ether ether ketone) (SPEEK)/Cloisite 15A® nanocomposite membranes were prepared via solution intercalation method. For better dispersion of nanoclay in the polymer matrix, the solution intercalation method was modified and a ...
Ismail, Ahmad F.   +6 more
core   +1 more source

Study on the AFM Force Curve Common Errors and Their Effects on the Calculated Nanomechanical Properties of Materials

open access: yesJournal of Engineering, 2016
The atomic force microscope (AFM) force curve has been widely used for determining the mechanical properties of materials due to its high resolution, whereby very low (piconewton) forces and distances as small as nanometers can be measured.
D. Almasi   +4 more
doaj   +1 more source

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