Preparation of chitosan-copper nanoparticles coated Kraft paper, characterization and its antimicrobial activity

Document Type: Original Research Paper

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Abstract

In this paper, chitosan-copper nanoparticles were successfully coated onto the Kraft paper using a dip coating process. First, chitosan-copper nanoparticles solution was prepared by reduction method and the use of ultrasonic radiation. It was employed copper sulphate pentahydrate as precursor salt, NaOH as a reducing agent and chitosan as capping agent to prepare chitosan-copper nanoparticles solution. The solution was analyzed by UV-Vis spectroscopy and dynamic light scattering (DLS). The size range of the produced chitosan-copper nanoparticles was about 60 nm. These chitosan-copper nanoparticles were successfully coated onto the Kraft paper using a dip coating process. The coated Kraft paper established very perfect antibacterial activity in contrast to gram negative and gram positive bacteria.After coating process, the coated Kraft paper was characterized by X-Ray diffraction and scanning electron microscopy (SEM). Then, the antimicrobial activity of the Kraft paper in contrast to Bacillus subtilis and Escherichia coli was measured by disc diffusion method.

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