The effect of amino‐modified mesoporous silica nanospheres on properties of SPEEK/HPW@Mesoporous Silica Nanoparticles proton exchange membrane

Abstract

Incorporating acid proton carriers into a polymer matrix is an effective way to improve proton conductivity, but the immobilization of acids is a problem. In this work, mesoporous silica nanoparticles (MSNs) incorporating phosphotungstic acid (HPW) into sulfonated poly(ether ether ketone) (SPEEK) improved the conductivity of the proton exchange membrane. Meanwhile, the surface of the MSNs was aminated, and the ion interaction with SPEEK was established to increase the dispersion of MSNs. Composite membranes doped with surface-modified silica (K-MSNs) have excellent proton conductivity and conductivity stability. When the K-MSNs content was 1 wt%, the proton conductivity of the composite membrane reached 243 mS/cm at 60 C. After 240 hr of immersion at 60 C, proton conductivity was retained at 210 mS/cm. Compared with MSNs, K-MSNs has a large number of amino groups on its surface, which can effectively reduce the loss of HPW.

The advances development of proton exchange membrane with high proton conductivity and balanced stability in fuel cells

“…Zirconia (ZrO 2 ), 46 titanium dioxide (TiO 2 ), 31,[47][48][49][50] carbon nanotubes, 51,52 and other non-conducting nanoparticles typically require to exhibit hydrophilicity, as do nanoparticles with distinctive morphologies like porous, 46 columnar, 31 lamella, 53,54 spherical, [55][56][57] and so on. The stability of PEM is unaffected.…”

A review on sulfonated poly (ether ether ketone) based‐membrane in direct borohydride fuel cell applications

“…As a result, SPEEK/HPW@K-MSNs-x composite membrane has a substantially higher proton conductivity than SPEEK/HPW@MSNs-x composite membrane, and the potential is used in methanol fuel cells. 123 Phosphorylation of a modified silane coupling agent (SiP-I) either polymer-bonded silica submicrospheres were used to make phosphorylated silica submicrospheres (SiP-II). The number of PO 3 H 2 clusters upon this silica surface and the distance of stationary grafting chain upon that silica surface can be easily controlled, so these two types of phosphorylated silica submicrospheres have been integrated with SPEEK network to produce SPEEK/SiP-I as well as SPEEK/SiP-II composite membranes.…”

“…Meng et al 123 used 3‐triethoxysilylpropylamine to modify amino nanoparticles of mesoporus silica (MSNs) nanospheres (KH550). PEM is made from a modified MSN nanosphere that has been loaded with phosphotungstic acid (HPW) and combined with SPEEK.…”

“…This has increased the number of proton channels available while also enhancing interface compatibility. As a result, SPEEK/HPW@K‐MSNs‐x composite membrane has a substantially higher proton conductivity than SPEEK/HPW@MSNs‐x composite membrane, and the potential is used in methanol fuel cells 123 …”

A pronounce approach on the catalytic performance of mesoporous natural silica toward esterification of acetic acid with iso‐amyl, benzyl, and cinnamyl alcohols

“…The three bands that appear at 3600, 3650, and 3700 cm À1 indicate the presence of hydrogen bond that resulted from interaction between the silanol groups (Si OH). [32,39,41] In addition, the bands located at 781, 680, 489, and 451 cm À1 are attributed to the bending vibration of Si O Si link. [39,40,42,43] Moreover, no new bands were observed with the increase of annealing temperature, which again reflected the stability of α-SiO 2 .…”