Abstract
STARCH-G-POLY(ACRYLIC ACID)/MICA BIONANOCOMPOSITE SUPERABSORBENT: BIODERADABILITY AND SWELLING BEHAVIOUR STUDIES

Prafulla K Sahoo, Bipra N Mallick and Pradeep K Rana

ABSTRACT

A novel Starch-g-Poly(acrylic acid)/mica superabsorbent bionanocomposite was synthesized by graft copolymerization reaction of starch with acrylic acid (AA) and addition of fine mica powder via emulsion polymerization using ammonium persulfate (APS) as initiator at 500C. The reaction parameters such as initiator and monomer concentrations were optimized to get the maximum percentage grafting. The grafted samples were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and thermo gravimetric analysis (TGA) techniques and evaluated for properties like swelling behavior, biodegradability and thermal stability. The swelling behavior and biodegradability were found to be higher with higher starch and lower mica content. Thermal stability of the synthesized bionanocomposite was higher for the increased mica content specimens. The novelty of this synthesized bionanocomposite is that it can be used as a superabsorbent having potential thermal stability in probable biomedical as well as engineering applications.

Keywords: Starch, acrylic acid, mica, bionanocomposite, superabsorbent, Biodegradation.


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