Zare Alireza, Montané Xavier, Reina José Antonio, Giamberini Marta
Department of Chemical Engineering, Universitat Rovira i Virgili (URV), Av. Països Catalans, 26, 43007 Tarragona, Spain.
Department of Analytical Chemistry and Organic Chemistry, Universitat Rovira i Virgili (URV), C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain.
Polymers (Basel). 2021 Nov 12;13(22):3915. doi: 10.3390/polym13223915.
In this paper, we report on the preparation and characterization of membranes out of two side-chain liquid crystalline copolymers, dendronized at two different extents (20 and 40%, CP20 and CP40, respectively). The membranes were characterized by atomic force microscopy (AFM), field-emission scanning electron microscopy (FESEM), contact angle (CA) analysis, and water uptake. Moreover, transport properties were studied by methanol and proton conductivity experiment and by linear sweep voltammetry (LSV). For the sake of comparison, the behavior of the grafted copolymers was compared with the unmodified copolyether CP0 and with Nafion 117. Results demonstrated that in CP20 and CP40, cation transport depends on the presence of defined cationic channels, not affected by water presence; the comparison between LSV experiments performed with different alkaline cations suggests that CP40 possesses channels with larger diameters and better-defined inner structures.
在本文中，我们报道了由两种不同程度树枝状化（分别为20%和40%，即CP20和CP40）的侧链液晶共聚物制备的膜及其表征。通过原子力显微镜（AFM）、场发射扫描电子显微镜（FESEM）、接触角（CA）分析和吸水率对膜进行了表征。此外，通过甲醇和质子传导率实验以及线性扫描伏安法（LSV）研究了传输性能。为了进行比较，将接枝共聚物的行为与未改性的共聚醚CP0以及Nafion 117进行了比较。结果表明，在CP20和CP40中，阳离子传输取决于特定阳离子通道的存在，不受水的影响；用不同碱性阳离子进行的LSV实验之间的比较表明，CP40拥有直径更大且内部结构更明确的通道。
