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Synthesis of Monodisperse Nano Zinc Oxide Particles by a Novel Chemical Route

Synthesis of Monodisperse Nano Zinc Oxide Particles by a Novel Chemical Route

Description and salient Technical features

A novel chemical process was developed at CIRCOT for the preparation of zinc oxide nanoparticles by using zinc nitrate and sodium hydroxide precursors. Soluble starch is used as stabilizing agent. The concentration of soluble starch is a major factor that decides the size of the nanoparticles. These nanoparticles can be applied on to cotton fabrics to impart antibacterial and UV-protection functions.

The average size of ZnO nanoparticles is estimated to be 38 ± 3 nm as measured using a transmission electron microscope (TEM); this was also confirmed by x-ray diffraction analysis and the effective mass approximation method. The starch content in synthesized nano-ZnO was estimated to be 37.57% by thermo-gravimetric analysis.

Applications:

  • For Nano coating the surfaces of textiles, clothing, and textiles for footwear to have UV blocking, antimicrobial and self-cleaning properties
  • As nanofillers in nanocomposite films suitable for food packaging
  • Coating of paper to impart anti-fungal and UV protection to enhance the shelf-life of paper
  • In cosmetics for UV protection and in medical textiles

Performance Results

The nano-ZnO impregnated cotton fabrics showed excellent antibacterial activity against two representative bacteria, Staphylococcus aureus (Gram positive) and Klebsiella pneumoniae (Gram negative). Also, nano-ZnO impregnation enhanced the protection of cotton fabrics against UV radiation in comparison with the untreated cotton fabrics.

Cost:

Capital Investment 30 lakh
Nano-ZnO production per year: 480 kg
Cost of production: 19,000/ kg
Selling price: 22,000/ kg
Last modified onThursday, 27 November 2014 11:31
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