High-performance sandwich-structure PI/SPEEK+HPW nanofiber composite membrane with balanced proton conductivity and stability

Wei, Peng; Huang, Dong; Luo, Chen; Sui, Yang; Li, Xi; Liu, Qingkun; Zhu, Bensheng; Cong, Chuanbo; Zhou, Qiong; Meng, Xiaoyu

doi:10.1016/j.polymer.2023.125800

Cited by 12 publications

(9 citation statements)

References 56 publications

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“…There are three processes in the degradation of SPEEK, which are the evaporation of the solvent, the breakdown of SO 3 H, and the main chain of SPEEK, respectively. [29][30][31] When more SO 3 H was added into SPEEK as the DS grew, the thermal stability of membranes worsened. In conclusion, thermal stability can also be controlled.…”

Section: Non-fluorinated Sulfonic Acid Membranementioning

confidence: 99%

“…As a consequence of the thermogravimetric analysis (TGA), thermal stability can be determined. There are three processes in the degradation of SPEEK, which are the evaporation of the solvent, the breakdown of SO 3 H, and the main chain of SPEEK, respectively 29–31 . When more SO 3 H was added into SPEEK as the DS grew, the thermal stability of membranes worsened.…”

Section: Introductionmentioning

confidence: 99%

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

Wei

Sui

Meng

et al. 2023

J of Applied Polymer Sci

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In the proton exchange membrane fuel cell, proton exchange membrane (PEM) serves as both the main conductor of protons and the fuel‐blocking membrane. Thus, high proton conductivity and excellent stability are expected for PEMs at the same time. According to chemical structure, this review divides PEM into three groups. Recently, high‐performance PEM has been made possible by controlling chemical structure, organic–inorganic hybrid composite membranes, and nanofiber composite membranes. One of them, nanofiber composite membranes, is distinguished by long‐range order and is capable of achieving both strong proton conductivity with exceptional stability. The high‐performance PEM has been accomplished by the presence of an acid‐rich layer, acid–base interaction, and proton transport channel in PEMs are also summarized in this paper. We believe that our discussion will help the researcher create high‐performance PEM and pave the way for further developments in the field of energy materials as a whole.

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Section: Non-fluorinated Sulfonic Acid Membranementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Wei

Sui

Meng

et al. 2023

J of Applied Polymer Sci

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“…An M2000 rheometer from Gotech Testing Machines Inc. was used to measure the curing curves 37 of all samples at 160 C. The chemical structure can be determined by Fourier transform infrared (FTIR, Bruker Tensor II), and its thermal stability can be assessed by using a thermogravimetric analyzer (TGA, TA Q5000) tested from 50 to 800 C with 20 C/min under nitrogen atmosphere. 38,39 Using a dynamic mechanical analyzer (DMA, Pyris 8000) in the tension mode at a frequency of 1 Hz, the storage modulus (E 0 ), loss modulus (E 00 ), and damping factor (tanδ) were determined as functions of temperature, and tanδ was defined by the value of E 00 /E 0 . With a heating rate of 3 C/min and a strain amplitude of 0.1% in the À60 to 60 C temperature range.…”

Section: Characterizationmentioning

confidence: 99%

Effect of cyanide content on the tribological performance of nitrile butadiene rubber

Wei,

Liu,

Hou

et al. 2023

J of Applied Polymer Sci

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Nitrile butadiene rubber (NBR) has received a lot of attention as a sealing material, and its tribological performance is a crucial factor in determining the efficiency with which it will operate under various operating situations. In this study, NBR specimens with varying degrees of cyanide content, namely low cyanide (DN401), medium cyanide (DN2850), medium‐high cyanide (DN3380), and high cyanide (DN4050), were selected to investigate their tribological behavior when subjected to NO.10 aviation oil. To emulate their frictional responses during startup and shutdown operations, all four types of NBR were assessed under dry conditions. As the cyanide content increased, the coefficient of friction (COF) dropped from 1.381 to 0.810 and wear rate dropped from 2.38 × 10−3 mm3/(N m) to 1.88 × 10−4 mm3/(N m). When employed in conjunction with NO.10 aviation oil, DN401 and DN3380 exhibited COFs of 0.0963 and a slightly higher value of 0.127, respectively. Following aging treatment at 80°C in NO.10 aviation oil, stress reduction reached 65.8%, indicating the poorest performance among the four variants of NBR. Considering the COF, wear rate, and aging performance, DN3380 emerges as the most favorable choice for practical applications, thereby offering valuable insights into the selection of nitrile rubber for sealing materials.

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“…Experimental data shows that adding MOF to the polymer matrix can improve the proton conductivity of membrane. Wei et al 35 proposed that combining the high proton conductivity of phosphotungstic acid and outstanding physical characteristics of PI to prepare composite films. In particular, sandwich structures are prepared to enhance the film stability.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance study of ionic liquid @ boron nitride modified polyimide proton exchange membrane

Wang

et al. 2023

Polymer Composites

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Proton exchange membrane (PEM) plays a relatively significant part in PEM fuel cells (PEMFCs). In this study, ionic liquid were grafted onto boron nitride (ILs@BN) were prepared by wet ball milling, and the polyimide (PI) composite films with different contents (1, 2, 3, 4, and 5 wt%) of ILs@BN were fabricated by solution‐casting method. Results showed that compared with the original polyimide films, the performance of the obtained composite films has been significantly improved. Tensile strength of film containing 4 wt% ILs@BN was enormously enhanced by 93.62% (from 47 to 91.8 MPa), respectively, in contrast to pure PI film. Compared with pure PI film, film containing with 4 wt% ILs@BN was reduced from 71.2° to 63.2°, which indicated the better hydrophilicity of the film and potential proton transport channels. The composite film exhibited excellent proton conductivity, which was tremendously elevated by 58.35% (from 0.1215 S cm−1 for pure PI to 0.1924 S cm−1 for film containing with 4 wt% ILs@BN). Comprehensively, the film containing with 4 wt% ILs@BN presenting excellent mechanical properties (91.8 MPa), contact angle (63.2°) and proton conductivity (0.1924 S cm−1) demonstrating strong potential applications in fuel cells.

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High-performance sandwich-structure PI/SPEEK+HPW nanofiber composite membrane with balanced proton conductivity and stability

Cited by 12 publications

References 56 publications

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

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

Effect of cyanide content on the tribological performance of nitrile butadiene rubber

Preparation and performance study of ionic liquid @ boron nitride modified polyimide proton exchange membrane

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