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　/CO 15 / CO CO Electrochemical Sensors w ith PVDF-g-PS/PASA Electrolyte Membrane 1, 2 2 3 2 1, 3 , , , , (1 , 100083; 2 , 01 010; 3 , 01 010) 1, 2 2 3 2 1, 3 GUO Gui-bao , WANG Ya-xiong , KO U Sha-sha , HU Li-jie , AN Sheng-li (1 School of M etallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;2 School of Chemistry and Chemical Engineering, Inner Mongolia University of Science Technology, Baotou 01 010, Inner Mongolia, China;3 School of M aterials and M etallurgy, Inner Mongolia University of Science Technology, Baotou 01 010, Inner Mongolia, China) :(BPO), / (PVDF), /(PVDF-g-PS/ PASA )。 FTIR : PVDF ;20%～ 80%, PVDF-g-PS/ PASA , -1 0.0198S ·cm , 0 ℃99%。 CO , CO 。 :;; :TB 3　　:A　　:1001- 381(2010)05-0015-05 Abstract:A new method based on a solution graft technique w as used to prepare poly (vinylidene flu- oride)grafted styrene/acrylic acid sulfonated acid (PVDF-g-PS/PASA )electrolyte membrane.F TIR analysis results indicate that styrene and acrylic acid are grafted on the PVDF;the conductivity of PVDF-g-PS/PASA membrane is 0.0198S/cm at room temperature.T he conductivity of the membrane changes slightly at a humidity range of 20%-80 %.The w eightlessness of PVDF-g-PS/PASA mem- brane heated to 0 ℃is less than 1%, w hich indicates that keeping w ater ability is goo