Modification of ultrathin polyetheretherketone film for application in direct methanol fuel cells

Poly(ether ether ketone) (PEEK)-based graft-type polymer electrolyte membranes having high crystallinity for high conducting and mechanical properties under various humidified conditions

“…By TGA measurements, the amount of DVB incorporated into the PEEK substrates was estimated to be 2-3 wt%. 34,35 Next, we used the DVB-containing PEEK lms as base polymer lms for further radiation-induced gra-polymerization. The PEEK lm was irradiated with a dose of 160 kGy at room temperature.…”

“…Gra-type PEMs, which are prepared by radiation-induced gra polymerization of monomers and the subsequent sulfonation reaction of the gra polymers, can overcome the abovementioned problems because the gra-type PEM comprises substrate lms that have a mechanically tough crystalline phase and various functional graed polymer phases directly bonded to the polymer main chain. [31][32][33][34][35][36][37][38][39][40][41][42][43][44] Furthermore, the introduction of sulfonated gra side chains into the polymer main chain is an excellent approach to PEM preparation because the IEC values can be controlled by easily changing the degree of graing. Recently, we studied the RH dependence of the electrochemical and mechanical properties of poly(styrene sulfonic acid) (PSSA)-graed poly(ethylene-co-tetrauoroethylene) polymer electrolyte membranes (ETFE-PEMs) over a wide IEC range.…”

Coating of Polyetheretherketone Films with Silver Nanoparticles by a Simple Chemical Reduction Method and Their Antibacterial Activity

“…The amount of silver deposited is determined from the difference of pure PEEK and modified PEEK thermograms [52,53]. The temperature at which the difference was taken was 675 °C, since at this temperature the polymer is decomposed as shown in Figure 6 and as reported in the literature [54]. In this sense, for the polymers coated with a single layer of silver nanoparticles in concentrations of 0.04, 0.08 and 0.12 mol/L the amount of silver was 5.9, 8.12 and 10.8 % silver, respectively.…”

Hydrophobic Effect on Alkaline Stability of Graft Chains in Ammonium‐type Anion Exchange Membranes Prepared by Radiation‐Induced Graft Polymerization

“…The authors have concentrated on developing graft-type PEMs and AEMs by radiation-induced graft polymerization. [28][29][30][31][32][33][34][35][36][37][38] The advantage of radiation-induced graft polymerization is the introduction of ionic groups containing graft polymers into mechanically and thermally tough polymers, such as poly (ethylene-co-tetrafluoroethylene) (ETFE) and poly(ether ether ketone), while maintaining these properties. [31][32][33] Therefore, these graft-type PEMs and AEMs composed of a mechanically and thermally tough crystalline substrate and ionic grafts will solve the problem of low alkaline stability.…”