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采用直接聚合法与逐层镀膜法分别成功制备了聚苯胺(PANI)/聚丙烯酸(PAA)复合薄膜,通过SEM、FTIR考察了两种工艺制备的薄膜的形貌和微结构,并测定了两种复合薄膜的循环伏安性能(CV)、电流响应特性(CA)及电致变色性能。结果表明,SEM与FTIR证实了两种方法制备的PANI/PAA复合薄膜仅在材料结构上有所不同;直接聚合法制备的PANI/PAA复合薄膜(PANI/PAA-DP)表面具有较大颗粒,两对明显的氧化还原峰,氧化态和还原态的响应时间分别为120 ms和226 ms,在600～700 nm波长处的透过率调制幅度为10%;逐层镀膜法制备的PANI/PAA复合薄膜(PANI/PAA-LP)具有多孔的网络结构,3对氧化还原峰,氧化还原反应更明显,电致变色性能更优异,其氧化态和还原态的响应时间分别为45 ms和67 ms,在600～700 nm波长处的透过率调制幅度可达40%。
Polyaniline (PANI) / polyacrylic acid (PAA) composite films were successfully prepared by direct polymerization and layer-by-layer coating. The morphology and microstructure of PANI / PAA films were investigated by SEM and FTIR. Cyclic Voltammetry (CV), Current Response Characteristics (CA) and Electrochromic Properties of Composite Films. The results show that the PANI / PAA composite films prepared by the two methods differ only in the material structure by SEM and FTIR. The PANI / PAA composite films (PANI / PAA-DP) prepared by the direct polymerization method have larger particles on the surface, The response time of the two pairs of obvious redox peaks, oxidation state and reduction state were 120 ms and 226 ms respectively, and the transmittance modulation amplitude was 10% at the wavelength of 600-700 nm. The PANI / PAA PANI / PAA-LP has a porous network structure. The redox peaks of 3 pairs are more obvious and the electrochromic properties are better. The response time of PANI / PAA-LP is 45 ms and 67 ms respectively , In the 600 ~ 700 nm wavelength modulation rate of transmittance up to 40%.