阴离子交换膜是燃料电池的核心部件之一。掺杂阴离子交换膜中无机/有机物相容性低，限制了其掺杂量和性能提升。提出了有机-无机同轴纤维化的增强方法，采用同轴静电纺丝将掺杂功能化碳纳米管的咪唑化聚砜纤维化，再经热压成膜形成增强网络。在同轴纺丝头的内管添加碳纳米管，将其包裹限域在纤维芯层提高碳纳米管与咪唑聚砜的无机-有机相容性，使碳纳米管掺杂量从单轴电纺膜的0.4%提高至0.6%。同轴电纺膜的氢氧根离子电导率（60℃下49.7 mS/cm）、耐溶胀性能（60℃下10.5%）和热碱稳定性（60℃、1 mol/L KOH溶液浸泡168 h电导率保持85.3%）均高于单轴电纺膜和浇铸膜。结果表明，有机-无机同轴纤维化方法可以有效提高阴离子交换膜的相容性、电导率和耐溶胀性。

Anion exchange membrane (AEM) is one of the core components of fuel cell.The compatibility between inorganic and organic components in hybrid AEMs is a challenge issue.In this paper,the enhanced organic-inorganic coaxial fibrosis method is proposed,i.e.the coaxial electrospinning method is used to make carbon nanotubes (CNTs) doped imidazole polysulfone become fiber that is then thermally pressed into a membrane with a reinforced network.Carbon nanotubes are added to the inner tube of the coaxial spinning head,which are wrapped and confined in the fiber core layer to improve the inorganic-organic compatibility between CNTs and imidazole polysulfone,which can increase the doping amount of CNTs in coaxial electrospinning membrane to 0.6 wt%,higher than the 0.4 wt% of single axis electrospinning membrane.The membrane prepared through coaxial electrospinning method shows a 49.7 mS·cm^-1 of hydroxide conductivity at 60℃,a 10.5% of swelling ratio stability at 60℃ and a hot alkaline stability that the membrane can keep 85% of conductivity after it has been immersed in a 1 M KOH solution for 7 days at 60℃.All the performances are generally higher than that of single-axis electrospinning membrane and casting membrane.The results indicate the effectiveness of the coaxial electrospinning method on improving compatibility,conductivity and anti-swelling performance of anion exchange membrane.

孙嵩岚(1993-),女,硕士研究生,研究方向为静电纺丝法制备材料在电化学中的应用,sunsonglan@mail.dlut.edu.cn