摘要
Electrical conductivity and pH sensitivity of nano-PANI membrane was studied. In this work,an ordered porous nano-polyaniline/acrylate gel polymer( PAGP) membrane was prepared from methyl methacrylate( MMA)/acrylic acid( AA)/nano-PANI bicontinuous microemulsions. The morphology,electric conductivity and p H sensitivity of the composite membrane were studied using scanning electronic microscopy,atomic force microscopy,and electrochemical impedance spectroscopy. It was found that the polymer matrix comprises of two types of proton migrating tunnels: interconnect hydrophilic trench( IHT) and continuous amphiphilic matrix( CAM). The increase of doped nano-PANI particles in those channels leads to a formation of three dimension grain-boundary network. It contributes to the short response time and good reversibility of the sensors. Impedance changes in the low-frequency region reveal an inductive behavior to PANI membrane,which maybe the contribution of faradaic pseudocapacitance of the polymer materials.
Electrical conductivity and pH sensitivity of nano-PANI membrane was studied. In this work, an ordered porous nano-polyaniline/acrylate gel polymer （ PAGP ） membrane was prepared from methyl methacrylate （MMA）/acrylic acid （AA）/nano-PANI bicontinuous microemulsions. The morphology, electric conductivity and pH sensitivity of the composite membrane were studied using scanning electronic microscopy, atomic force microscopy, and electrochemical impedance spectroscopy. It was found that the polymer matrix comprises of two types of proton migrating tunnels ： interconnect hydrophilic trench （ IHT ） and continuous amphiphilic matrix （CAM）. The increase of doped nano-PANI particles in those channels leads to a formation of three dimension grain-boundary network. It contributes to the short response time and good reversibility of the sensors. Impedance changes in the low-frequency region reveal an inductive behavior to PANI membrane, which maybe the contribution of faradaic pseudocapacitance of the polymer materials.
基金
Sponsored by the National Natural Science Foundation of China(Grant No.51571093)
the Fundamental Research Funds for the Central Universities(Grant No.2015ZM094)
