Assembly of polyaniline crystalline film by interface induction and its gas response properties

doi:10.19491/j.issn.1001-9278.2022.10.009

Abstract

Abstract:

In this paper， a polyaniline （PANI） crystalline film was prepared using an interface template method， and then a PANI⁃film⁃based gas sensor was prepared using monocrystalline silicon as a substrate. The structure and properties of the resulting product were analyzed using FTIR， Raman， XRD， TEM， and a CGS⁃1TP gas sensing detection and analysis system. The effect of interface template inducement on the structure and gas sensing properties of PANI film were studied. The results indicated that the amphiphilic template induced PANI to polymerize at the gas⁃liquid interface and assemble onto the film. The crystallinity of PANI film was related to the reaction time， and its crystalline characteristics were evident when prepared at a reaction time ranging from 24 to 48 h. The film exhibited a value of gas response to 25 ppm NH₃ between 15 and 60. The average response and recovery time were 36 s and 51 s respectively. The film showed rapid response recovery characteristics and excellent stability.

Key words: interface template method, polyaniline, crystalline film, gas response property

CLC Number:

TQ323

DONG Jingwei, YAN Haiyan, WANG Yi, ZHANG Bo, CHEN Shujuan, LI Minhao, ZHANG Yue. Assembly of polyaniline crystalline film by interface induction and its gas response properties[J]. China Plastics, 2022, 36(10): 60-64.

Figures/Tables 5

Fig.1. Schematic diagram of preparation process and mechanism of PANI film

Fig.2. FTIR，Raman and UV⁃Vis spectrums of PANI films

Fig.3. XRD pattern and schematic diagram of interface induced assembly of PANI films

Fig.4. Micrographs of PANI films obtained at different reaction time

Fig.5. Thickness， conductivity and gas response of PANI films obtained at different reaction time

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