同轴电纺碳纳米管掺杂咪唑聚砜阴离子交换膜的研究  

Preparation of anion exchange membrane by coaxial-electrospinning of CNT doped imidazole polysulfone

作　　者：孙嵩岚 王乾峰 杨寅帅 梁山 张楠[1] 吴雪梅[1] 贺高红[1] SUN Song-lan;WANG Qian-feng;YANG Yin-shuai;LIANG Shan;ZHANG Nan;WU Xue-mei;HE Gao-hong(School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院

出　　处：《现代化工》2020年第2期99-104,共6页Modern Chemical Industry

基　　金：国家自然科学基金(21776034);国家重点研究发展计划(2016YFB0101203);国家自然科学基金联合基金(U1663223);科技部重点领域创新团队(2016RA4053);教育部长江学者奖励计划项目(T2012049);大连理工大学重大项目培育科研专题项目(DUT16TD19)

摘　　要：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 m S/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 m S·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.

关 键 词：阴离子交换膜燃料电池 同轴静电纺丝 碳纳米管 核壳结构 综合性能 

分 类 号：TQ028.8[化学工程]