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Dynamics of controlled release of potassium nitrate from a highly swelling binary polymeric blend of alginate and carboxymethyl cellulose
Author(s) -
Bajpai Jaya,
Mishra Sushma,
Bajpai A. K.
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26703
Subject(s) - swelling , carboxymethyl cellulose , fourier transform infrared spectroscopy , materials science , chemical engineering , cellulose , aqueous solution , scanning electron microscope , potassium nitrate , polymer chemistry , potassium , controlled release , nuclear chemistry , composite material , chemistry , organic chemistry , sodium , nanotechnology , engineering , metallurgy
Highly water absorbing and homogeneous binary biopolymeric blends in bead form were prepared of calcium alginate and carboxymethyl cellulose by solution cast method. The prepared blends were evaluated for controlled delivery of KNO 3 taking it as a model agrochemical. The beads characterized by Fourier transform infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM) were used to investigate the molecular structure and morphology of beads. The swelling experiments were performed for different compositions of beads and at varying pH and temperature of the aqueous media. The release experiments were performed under static and varying experimental conditions and the release data obtained were conductometrically fitted to Ficks equation to evaluate diffusion coefficients of released KNO 3 . The release results were further analyzed by Ficks power law equation, and the possible mechanisms of KNO 3 release were explored at different experimental conditions. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007