通过磺化反应在壳聚糖（CS）上引入磺酸基团制得具备良好质子传导能力的磺化壳聚糖（SPCS）。以含氟聚苯并咪唑（FPBI）为基体材料，通过掺杂磺化壳聚糖制备得到FPBI-SPCS复合质子交换膜。研究了SPCS的质量分数对复合膜的机械性能、热稳定性、吸水率、溶胀度、质子电导率等性能影响。结果表明，复合膜的质子电导率随着SPCS质量分数的增加而增加，但是吸水率、溶胀度却随着SPCS质量分数的增加而下降，复合膜依然能够保持良好的机械性能和热稳定性。FPBI-SPCS复合膜在80℃下最高电导率达18.52 mS/cm，有望在质子交换膜燃料电池中得到应用。

Sulfonated chitosan (SPCS) with excellent proton conductivity is made through adding sulfonic group onto chitosan (CS) by sulfonation reaction.Fluorinated polybenzimidazole-sulfonate chitosan (FPBI-SPCS) composite proton exchange membranes are obtained by doping SPCS into FPBI matrix materials.The effects of SPCS content on the properties of composite proton exchange membranes, such as mechanical properties, thermal stability, water absorbency, swelling degree and proton conductivity are well studied.It is found when SPCS content increases, the proton conductivity increases, the mechanical properties and thermal stability remain well but both water absorbency and swelling degree drop.The highest conductivity of FPBI-SPCS composite proton exchange membrane reaches 18.52 mS·cm^-1 at 80℃, which is expected to be used in proton exchange membrane fuel cells.

李杏杏(1992-),女,硕士研究生,主要从事功能膜材料的研究,m18351217330@163.com。