The Structure and Properties of Lysine Doped Polypeptide Modified Polypyrrole Nanoparticles

Abstract:

Lysine doped polypeptide modified particles were chemically synthesized in different weight ratios of polypeptide to Py feed. The microstructures of these PPys were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier Transform Infrared (FTIR). Semiconductor parameter analyzer, ubbelohde viscometer and rotation viscometer were used to characterize the electrical property, viscosity and solubility of these PPys. The results show that the polypeptide has the function as the template in the Py polymerization. The lysine doped PPys form many rings with diameters of about several micrometers, with the weight ratio increase, the ring structure become more obvious and the diameters of the rings decrease to about 200 nm. The conductivity of lysine doped polypeptide modified PPys synthesized with the weight ratio of 3:1 is about 1.73 × 10^-3 S/cm. It is mostly soluble in acetic acid, good soluble in the mixture of acetic acid and HFIP with a volume ratio of 2:1. Moreover, the solubility in the mixture of acetic acid and HFIP is little affected by weight ratio and maintain about 93.8%, indicating its good solubility in no toxicity solvent or very low toxicity solvent.

• Periodical: Applied Mechanics and Materials (Volume 665)
• Pages: 275-279
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.665.275
• Online since: October 2014
• Authors: Ying Liu, Jia Li Guan, Qiao Zhen Yu
• Keywords: Conductivity, Lysine, Polypeptide, Polypyrrole, Solubility

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