Facile one-step fabrication of sulfonated polyhedral oligomeric silsesquioxane cross-linked poly(ether ether ketone) for proton exchange membranes†,Polymer Chemistry

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Facile one-step fabrication of sulfonated polyhedral oligomeric silsesquioxane cross-linked poly(ether ether ketone) for proton exchange membranes†
Polymer Chemistry ( IF 4.1 ) Pub Date : 2018-06-04 00:00:00 , DOI: 10.1039/c8py00650d
Chang Liu _{1,

2,

3,

4,

5} , Zhongying Wu _{1,

2,

3,

4,

5} , Yixuan Xu _{1,

2,

3,

4,

5} , Shujiang Zhang _{1,

2,

3,

4,

5} , Chenliang Gong _{1,

2,

3,

4,

5} , Yiyao Tang _{1,

2,

3,

4,

5} , Dewen Sun _{6,

7,

8} , Hua Wei _{1,

2,

3,

4,

5} , Chunhui Shen _{5,

9,

10,

11}

Affiliation

A series of sulfonated polyhedral oligomeric silsesquioxane (POSS) cross-linked poly(ether ether ketone) hybrid membranes (C-PEEK-sPOSS) were facilely synthesized, for which the processes of sulfonation and cross-linking were achieved in one-step. The cross-linked hybrid C-PEEK-sPOSS membranes were fabricated using poly(ether ether ketone) with phenoxyl side groups (PEEK-OH), epoxy-POSS and 4-phenolsulfonic acid sodium via a nucleophilic addition reaction. Because the modified cross-linked structure contained a controllable degree of sulfonation and functionalized POSS, a good micro-phase separation for enhanced proton transport was observed by transmission electron microscopy (TEM). Furthermore, the cross-linked hybrid membranes were evaluated by the water uptake, proton conductivity, thermal properties, and so on. For example, C-PEEK-sPOSS-3 membranes possessed prominent properties, such as adequate thermal stability, superior mechanical properties and excellent oxidation resistance. Compared with Nafion 117, these membranes also exhibited higher proton conductivity (0.198 S cm⁻¹vs. 0.160 S cm⁻¹), greater selectivity (67.03 × 10⁴ Ss cm⁻³vs. 4.19 × 10⁴ Ss cm⁻³), lower methanol permeability (1.82 × 10⁻⁷ cm² s⁻¹vs. 18.6 × 10⁻⁷ cm² s⁻¹), and low swelling ratio at 80 °C under fully hydrated conditions (28.4%). The single cell test exhibited superior current and power densities of 1.7 A cm⁻² and 706 mW cm⁻² at 80 °C, respectively.

中文翻译：

用于质子交换膜的磺化多面体低聚倍半硅氧烷交联聚醚醚酮的便捷一步制备†

简便地合成了一系列磺化的多面体低聚倍半硅氧烷（POSS）交联的聚醚醚酮杂化膜（C-PEEK-sPOSS），实现了一步一步的磺化和交联过程。通过具有苯氧基侧基（PEEK-OH），环氧-POSS和4-苯酚磺酸钠的聚醚醚酮，制备了交联杂化C-PEEK-sPOSS膜。亲核加成反应。因为改性的交联结构包含可控的磺化度和功能化的POSS，所以通过透射电子显微镜（TEM）观察到良好的微相分离，以增强质子传输。此外，通过吸水率，质子传导率，热性质等评估了交联的杂化膜。例如，C-PEEK-sPOSS-3膜具有突出的性能，例如足够的热稳定性，优异的机械性能和出色的抗氧化性。与Nafion 117相比，这些膜还显示出更高的质子传导率（0.198 S cm ^-1对0.160 S cm ^-1），更大的选择性（67.03×10 ⁴ Ss cm ^-3）相对于4.19×10 ⁴ Ss cm ^-3），较低的甲醇渗透性（1.82×10 ^-7 cm ² s ^-1与18.6×10 ^-7 cm ² s ^-1）和在80°C下完全溶胀率低水合条件（28.4％）。单电池测试在80°C时分别具有1.7 A cm ^-2和706 mW cm ^-2的优异电流和功率密度。

更新日期：2018-06-04

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