Novel cross linked guar gum-g-poly(acrylate) porous superabsorbent hydrogels: Characterization and swelling behaviour in different environments

Chandrika, K S V P and Singh, A and Rathore, A and Kumar, A (2016) Novel cross linked guar gum-g-poly(acrylate) porous superabsorbent hydrogels: Characterization and swelling behaviour in different environments. Carbohydrate Polymers, 149. pp. 175-185. ISSN 01448617

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Abstract

A new series of eco-friendly cross linked guar gum-g-poly(acrylate) porous superabsorbent hydrogels was prepared by in situ grafting polymerization and cross-linking on to a natural guar gum employing N,N-methylene bis acrylamide as cross linker. Morphological and structural characterization of the prepared hydrogels (SPHs) done by Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and solid state C13 NMR spectroscopy confirmed formation of porous grafted and crosslinked hydrogel structure. Increase in cross linker concentration in the feed mass exhibited decrease in porosity and increase in density of the hydrogels. Swelling of an optimized hydrogel (SPH) in response to external stimuli namely, salt solutions, fertilizer solutions, temperature, and pH exhibited high swelling ratios in various environments. Swelling rate of the SPH was faster than the corresponding nonporous superabsorbent hydrogel. The prepared hydrogels can serve as excellent carriers of pesticides, fertilizers and agriculturally important microbes. Biocontrol formulations based on a representative SPH exhibited excellent shelf-life characteristics and bioefficacy against phytopathogenic fungus Pythium aphanidermatum.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Guar gum, Porous, Swelling, Hydrogels, Crosslinking, biocontrol microbe
Subjects:	Others > Genetics and Genomics
Depositing User:	Mr Ramesh K
Date Deposited:	09 Jan 2018 10:41
Last Modified:	21 Feb 2018 07:01
URI:	http://oar.icrisat.org/id/eprint/10393
Official URL:	http://dx.doi.org/10.1016/j.carbpol.2016.04.077
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	Authors are thankful to ICAR-Indian Agricultural Research Institute, New Delhi and Post Graduate School of the Institute for providing funds to conduct this research.
Links:	Google Scholar

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