交联剂含量对碱性阴离子交换膜性能的影响

Effect of the Content of Crosslinker on the Performance of Alkaline Anion Exchange Membrane

通过紫外光引发聚合的方法制备了碱性阴离子交换膜,通过万能试样机、热重分析仪和电化学工作站研究了碱性阴离子交换膜的机械性能、热稳定性和电导率,并考察了交联剂对二乙烯基苯的含量对碱性阴离子交换膜性能的影响。实验结果表明交联剂的含量对碱性阴离子交换膜热稳性几乎没有影响;随着交联剂含量的增加,碱性阴离子交换膜的弹性模量和抗张强度逐渐增大,但是阴离子交换膜的吸水率、溶胀度和电导率逐渐降低。通过控制交联剂的含量可以很好地调节碱性阴离子交换膜的综合性能,当交联剂质量分数为4%时,碱性阴离子交换膜的抗张强度为13.6MPa,弹性模量为449MPa,30℃时电导率达到3.3×10-2S·cm-1,这些实验结果表明该类碱性阴离子交换膜具有很好的应用前景。

Alkaline anion-exchange membranes thermal stability, mechanical properties （AEMs） are prepared and conductivity of by irradiation with UV light. The AEMs were characterized by thermogravimetric analyzer, Instron universal testing machine and electrochemical workstation, respec- tively. The effect of crosslinker （divinylbenzene, DVB） content on the properties of the AEMs was sys- tematically studied. The results showed that the crosslinker content has little influence on the thermal sta- bility of the AEMs. The values of tensile strength and elastic modulus of the AEMs are increased, while the water uptake, swelling degree and conductivity of AEMs are decreased with increasing the crossliker content. The properties of the AEMs could be well adjusted by changing the content of crosslinker. The AEM with 40/00 DVB shows the tensile strength of 13.6MPa, elastic modulus of 449MPa, and the conduc- tivity of 3.3 × 10-2 S · cm-1 at 30℃. The AEMs show good potential applications in alkaline anion ex- change membrane fuel cells.