三磺化聚二氮杂萘酮醚氧膦质子交换膜的合成及性能

Synthesis and Characterization of Tri-sulfonated Poly(phthalazinone ether phosphine oxide) s Proton Exchange Membrane

以直接缩聚法将4-(4’-羟苯基)-2,3-二氮杂萘酮、二(4-氟苯基)苯基氧膦和二(3-磺酸钠-4-氟苯基)-3’-磺酸钠苯基氧膦引入到聚合物主链,通过改变磺化单体的比例,得到一系列不同磺化度的三磺化聚二氮杂萘酮醚氧膦聚合物.分子中的二氮杂萘酮基团和磺酸基团的分布方式使相应的聚合物膜具有适当的吸水率、优异的尺寸稳定性和耐氧化性.尤其是高磺化度的膜在具有较高电导率的同时仍能保持较低的溶胀和突出的耐氧化稳定性.

A series of tri-sulfonated poly（phthalazinone ether phosphine oxide）s were prepared via direct polycondensation from 4-（4-hydroxyphenyl） phthalazinone with different molar ratios of bis （4- fluorophenyl）-phenyl phosphine oxide and bis （3-sulfonate-4-fluorophenyl）-3＇-sulfonate phenyl phosphine oxide. The prepared membranes showed appropriate water absorption and excellent dimensional stability as well as oxidative resistance due to the phthalazinone units and the distribution models of sulfonic acid groups. In addition, the membrane with high sulfonation degree displays higher proton conductivity while maintaining lower swelling and outstanding oxidative resistance.