Effects of solvent interactions on the structure and properties of prepared PAni nanofibers

• Published in: Journal of applied polymer science Vol. 126; no. 3; pp. 830 - 836
• Main Authors: Pramanik, Sujata, Karak, Niranjan, Banerjee, Somik, Kumar, Ashok
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.11.2012; Wiley; Wiley Subscription Services, Inc
• Subjects: Aniline; Applied sciences; Benzenoids; Conjugation; Density; Exact sciences and technology; Fibers and threads; Forms of application and semi-finished materials; FTIR; Materials science; Nanofibers; photoluminescence; polyaniline nanofiber; Polymer industry, paints, wood; Polymerization; Polymers; Reproduction; Solvents; structure and properties; Technology of polymers; Solvent effect; Electrical conductivity; Electrical properties; Synthetic fiber; Photoluminescence; Aromatic polymer; Nanofiber; Experimental study; Property processing relationship; Conducting polymers; Heterogeneous polymerization; Structure processing relationship; Morphology; Optical properties; FTIR; Solubility parameter; Oxidative polymerization; Thermodynamic properties; structure and properties; polyaniline nanofiber; Aniline polymer; Conformation
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.36950

The changes of structure and properties of nanofibers were studied as a function of solubility parameters of the organic solvents that are used in interfacial polymerization of polyaniline (PAni) nanofibers. The presence of UV–visible absorbance at 340, 440, and 800 nm confirmed the formation of emeraldine salt structure of the prepared PAni nanofibers. Fourier transform infrared spectral results indicate an increasing trend of benzenoid to quinoid ratio with the decrease of interaction of the solvents with aniline. This can be correlated to the increase in the degree of conjugation of the polymer chain. Photoluminescence study revealed an increase in the density of defect state with the decrease of interaction. Single‐line approximation technique was used to analyze the broadening of the most intense X‐ray reflection peak corresponding to (110) plane of the nanofibers. The greater the solvent–monomer interaction, the lesser was the domain length and π‐stacking of the PAni chains. The study of this interaction is instrumental to precisely control the internal conformation of the PAni nanofibers. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012