本文理论推导出全氟磺酸膜中水的冻结温度与摩尔含水量λ之间的关系式,并采用示差扫描量热法通过实验测试不同水含量下Nation211膜的冻结温度.结果表明:Nation211膜的冻结温度随水含量的增大而升高.当膜中水总含量λ<7时,膜中水的冻结温度下降到-15℃以下;而当A<20时,膜中水的冻结温度低于-20℃.理论计算与实验测试数据十分吻合.
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