Composite membranes based on sulfonated silica/sulfonated poly（ether ether ketone）（SPEEK） were prepared by means of sol-gel method so as to gain a high conductivity and reasonable methanol permeability.The sulfona...Composite membranes based on sulfonated silica/sulfonated poly（ether ether ketone）（SPEEK） were prepared by means of sol-gel method so as to gain a high conductivity and reasonable methanol permeability.The sulfonated silica is generated in situ via the hydrolysis of sulfonated 3-anminopropyl triethoxysilane（KH550） synthesized newly from 3-aminopropyl triethoxysilane and 1,4-butane sultone.The membrane with a silica mass fraction of 5% exhibits a conductivity of 0.187 S/cm at 80 °C and a methanol coefficient with 9.72×10-7 cm2/s.The composite membranes show improved condutive ability and better selectivity that can be promisingly used in direct methanol fuel cell.展开更多
基金Supported by the National High-Tech Research and Development Program of China(No.2007AA03Z218)
文摘Composite membranes based on sulfonated silica/sulfonated poly（ether ether ketone）（SPEEK） were prepared by means of sol-gel method so as to gain a high conductivity and reasonable methanol permeability.The sulfonated silica is generated in situ via the hydrolysis of sulfonated 3-anminopropyl triethoxysilane（KH550） synthesized newly from 3-aminopropyl triethoxysilane and 1,4-butane sultone.The membrane with a silica mass fraction of 5% exhibits a conductivity of 0.187 S/cm at 80 °C and a methanol coefficient with 9.72×10-7 cm2/s.The composite membranes show improved condutive ability and better selectivity that can be promisingly used in direct methanol fuel cell.
