Meek Kelly M, Elabd Yossef A
Department of Chemical Engineering, Texas A & M University, College Station, TX, 77843, USA.
Macromol Rapid Commun. 2016 Jul;37(14):1200-6. doi: 10.1002/marc.201600089. Epub 2016 Apr 29.
The successful synthesis of a new diblock copolymer, referred to as sulfonated polymerized ionic liquid (PIL) block copolymer, poly(SS-Li-b-AEBIm-TFSI), is reported, which contains both sulfonated blocks (sulfonated styrene: SS) and PIL blocks (1-[(2-acryloyloxy)ethyl]-3-butylimidazolium: AEBIm) with both mobile cations (lithium: Li(+) ) and mobile anions (bis(trifluoromethylsulfonyl)imide: TFSI(-) ). Synthesis consists of polymerization via reversible addition-fragmentation chain transfer, followed by post-functionalization reactions to covalently attach the imidazolium cations and sulfonic acid anions to their respective blocks, followed by ion exchange metathesis resulting in mobile Li(+) cations and mobile TFSI(-) anions. Solid-state films containing 1 m Li-TFSI salt dissolved in ionic liquid result in an ion conductivity of >1.5 mS cm(-1) at 70 °C, where small-angle X-ray scattering data indicate a weakly ordered microphase-separated morphology. These results demonstrate a new ion-conducting block copolymer containing both mobile cations and mobile anions.
据报道，一种新型二嵌段共聚物成功合成，即磺化聚合离子液体（PIL）嵌段共聚物聚（SS-Li-b-AEBIm-TFSI），它同时包含磺化嵌段（磺化苯乙烯：SS）和PIL嵌段（1-[(2-丙烯酰氧基)乙基]-3-丁基咪唑鎓：AEBIm），带有可移动阳离子（锂：Li(+)）和可移动阴离子（双(三氟甲基磺酰基)亚胺：TFSI(-)）。合成过程包括通过可逆加成-断裂链转移进行聚合，随后进行后功能化反应，将咪唑鎓阳离子和磺酸根阴离子共价连接到各自的嵌段上，接着进行离子交换复分解反应，生成可移动的Li(+)阳离子和可移动的TFSI(-)阴离子。含有溶解在离子液体中的1 m Li-TFSI盐的固态薄膜在70°C时离子电导率>1.5 mS cm(-1)（-1），其中小角X射线散射数据表明存在弱有序的微相分离形态。这些结果证明了一种同时含有可移动阳离子和可移动阴离子的新型离子导电嵌段共聚物。
