SPEEK/B-SPEEK共混质子交换膜的制备及其性能

Preparation and properties of hybrid proton conducting membranes based on SPEEK/B-SPEEK

聚醚醚酮进行磺化,得到了磺化聚醚醚酮(SPEEK),再先后与氯化亚砜和对甲苯磺酰胺反应,制备侧链含磺酰亚胺基的聚醚醚酮(B-SPEEK)。将SPEEK和B-SPEEK以不同的比例共混制备质子交换膜,研究了共混膜的结构、质子交换容量、吸水率、电导率、力学性能和热性能等。结果表明:SPEEK与B-SPEEK按质量比为1.0∶1.0制备的共混膜具有较好的力学性能(拉伸强度25.3 MPa,断裂伸长率45.1%)和最高的电导率(在80℃的条件下,电导率为0.227 S/cm),是一类非常有潜力的质子交换膜。

Sulfonated poly(ether ether ketone)(SPEEK)was used to react with sulfinyl chloride and p-toluenesulfonamide in sequence to prepare poly(ether ether ketone)with pendent sulfonimide groups(B-SPEEK).SPEEK was mixed with B-SPEEK in different ratios to obtain a series of proton exchange membranes.The structure,ion exchange capacity(IEC),water absorption,conductivity,mechanical and thermal properties of the hybrid membranes were observed.The results indicate that the prepared membranes in which the mass fraction of SPEEK and B-SPEEK is 1.0∶1.0 perform excellently in mechanical properties with tensile strength of 25.3 MPa and elongation at break of 45.1%and highest proton conductivity of 0.227 S/cm at 80℃,which is promising in this field.