Abstract The natural hydrophilic nanofiber-like palygorskite (Pal) particles were incorporated into the quaternary ammonium functionalized polysulfone (QPSf) to prepare high performance anion exchange membranes. Due to the mutual compatibility between quaternary ammonium groups in quaternized polysulfone and hydrophilic Pal particles, a hydrophilic domain could aggregate, thereby forming a hydrophilic-hydrophobic microphase separation structure. Meanwhile, the small-angle X-ray scattering (SAXS) was utilized to characterize the hydrophilic ionic cluster domain in the composite membrane. The results showed that the corresponding average inter-domain spacing of the QPSf/Pal-0.5 membrane was about 30 nm. Then, the new composite membrane had not only highly efficient hydrophilic ion transport channels but also adjustable hydrophilic-hydrophobic microphase separation structures. Compared with original quaternized polysulfone membranes, the hydroxide conductivity of the QPSf/Pal-0.5 membrane reached 93.0 mS·cm−1 at 80 °C, increasing by 48%, while the methanol permeability was kept between 4.2 × 10−7 and 5.8 × 10−7 cm2·s−1.

中文翻译：

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通过将纳米纤维状坡缕石掺入季铵化聚砜作为阴离子交换膜来增强氢氧化物电导率

摘要 将天然亲水性纳米纤维状坡缕石 (Pal) 颗粒掺入季铵官能化聚砜 (QPSf) 中制备高性能阴离子交换膜。由于季铵化聚砜中的季铵基团与亲水性Pal颗粒之间的相互相容性，亲水性区域可以聚集，从而形成亲水-疏水性微相分离结构。同时，利用小角 X 射线散射 (SAXS) 来表征复合膜中的亲水离子簇域。结果表明，QPSf/Pal-0.5 膜对应的平均域间距约为 30 nm。然后，新型复合膜不仅具有高效的亲水离子传输通道，而且具有可调节的亲水-疏水微相分离结构。与原始季铵化聚砜膜相比，QPSf/Pal-0.5 膜的氢氧化物电导率在 80°C 下达到 93.0 mS·cm-1，提高了 48%，而甲醇渗透率保持在 4.2 × 10-7 和 5.8 × 之间10−7 cm2·s−1。