具有有序亲水通道的两性离子型溶致液晶离子导体OA

Ordered lyotropic liquid crystals provide an effective structural platform for constructing continuous ion-transport channels.In this work,a lyotropic liquid-crystalline ion conductor was constructed using the polymerizable zwitterionic amphiphile SB11-1MA and aqueous LiCl solution as the model system,and its room-temperature phase behavior,structural parameters,and ion-transport properties were systematically investigated.Polarized optical microscopy(POM)and small-angle X-ray scattering(SAXS)results demonstrate that the system can self-assemble into an ordered normal hexagonal columnar phase(H1)within a certain composition range.Phase-behavior analysis shows that the introduction of LiCl changes the composition window of the H1 phase,shifting the hexagonal columnar phase region toward lower SB11-1MA contents.Further SAXS analysis reveals that the lattice parameter varies systematically with the SB11-1MA content and the concentration of the aqueous LiCl solution,indicating that the size of the hydrophilic domains and the molecular packing state can be regulated by adjusting the system composition.Electrochemical impedance spectroscopy(EIS)measurements show that the liquid-crystalline ion conductor exhibits good room-temperature ionic conductivity,with a maximum value of 1.1×10-3 S·cm-1.The conductivity variation among samples with different compositions indicates that ion transport is not simply determined by salt content or channel size,but is synergistically regulated by carrier concentration,hydrophilic-domain volume fraction,and the ordered liquid-crystalline structure.These results provide experimental evidence for the structural design and performance optimization of ordered liquid-crystalline ion conductors.