Synthesis And Characterization Of PPY Film With Self-assembly Three-dimension Texture Structure

Polypyrrole(PPy), as a Intrinsic conducting polymers, has been widely used in variousfields such as electrolyte materials, catalyst, drug delivery, electrochromic andelectromagnetic shielding because of the nature of environment friendly, high conductivity,varied preparation methods, and controllable morphology. According to achievement achievedby international experts, the micro-morphology of conductive polymers which dependslargely on the preparation methods could directly affect the specific capacitance, conductivityand mechanical properties. Therefore, to develop optimal preparation methods which couldobtain specific morphology for elegant properties has been one of the keys and focuses ofcurrent researches.In this paper, interfacial polymerization method was engaged to synthesize3-dimensional self-supporting polypyrrole membrane. Different surfactants which couldimprove the surface activity and polydispersion were used, and the PPy was deposited byself-assembly at different temperature. The interfacial effects on physico-chemical propertiesof self-supporting PPy and the probe membrane-formation mechanism were studied. Themicrostructure, micro-morphology and electrical properties of PPY was characterized throughFT-IR, SEM and CVs. Based on the experimental results, the preparation method of PPy forelectrode application was optimized with2.00g/L Tween80, interfacial polymerizationoperated at0℃for5h to prepare PPy membrane, and the conductivity reached4.545S/cm.Keeping the scan rate at50mv/s, the CVs detection was carried through in the aqueoussolution with1.00M NaNO3, the value of specific capacitance was429.97F/g and remained87.3%of the original value after1000th cycle.Single type of surfactant had little influence on molecular structure of self-supportingPPy prepared through interfacial polymerization while micro-morphologies and specificcapacitance were changed significantly. The morphologies of PPy were gorge landscape, willow catkins, deposition of vesicles, algae and thread with the presence of SDBS, CTAB,OP-10, Tween80and Span80, respectively. Insignificant change of specific capacitance wasobserved with addition of CTAB while optimal significant change with Tween80, and the bestspecific capacitance was observed at the concentration of2.00g/L.The effects of polymerization temperature were studied with2.00g/L Tween80. Noevident FT-IR absorbance peaks of over-oxidation or by-product were observed. Particle sizeof alage like morphology grown larger with porous decreased which grown into deposit ofvesicles with the increasing polymerization temperature, eventually. According to BETanalysis, the specific surface area at0℃(106.3m2/g) was remarkably higher than that at30℃(41.3m2/g). PPy showed better thermostability, and decreasing trend of specific capacitancedecreasing was observed with synthesize temperature increasing.According to multicomponent surfactants experimental data, the morphology andcapacitance of PPy were influenced by the surfactants group significantly. The PPymorphology changed from thread-like into alage-like with HLB value increasing. The specificcapacitances showed W-type curve with the increasing of HLB value, and optimal specificcapacitance (372.33F/g) was observed when the HLB value was9.0. Experiment results withternary surfactants showed that the microstructure of PPy was transformed from spidereggs-piled into holes-interpenetrating with the increasing of WtOP-10, and the optimal specificcapacitance (426.18F/g) was observed when the concentration of OP-10, Span80was1.45g/L,1.55g/L, respectively.