Govindaraju, K (2022) Controlled release characteristics of methylenebisacrylamide crosslinked superabsorbent polymer for water and fertilizer conservation in agriculture sector. Journal of Polymer Research, 29: 298. pp. 1-13.

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Abstract

A series of superabsorbent polymers (SAPs) were synthesized free-radically using hydroxyethyl methacrylate (HEMA), acrylic
acid (AA) and its potassium salt, methacrylic acid (MAA) and its potassium salt as monomers, and N,N'-Methylenebisacrylamide
(N,N1
-MBA) as crosslinker. The synthesized SAPs were evaluated for their chemical structure (FT-IR), thermal stability (TGA/
DTG), surface morphology (SEM), and water, fertilizers uptake and release characteristics (swelling and deswelling). A SAP
with the optimized composition of monomer and crosslinker had absorbed 898 g/g of water, and 68% of urea and 51% of potash
from the 1% corresponding fertilizer solutions. The equilibrium swollen SAP had released the absorbed water completely over
21 days, but only 28% of potash and 43% of urea were released from the fertilizer-loaded SAPs under identical conditions with
the same duration of release time. The water uptake followed Fickian difusion mechanism for the optimized SAP. Thus obtained
experimental results revealed that the synthesized SAP may be used as the matrix for the controlled release of water and fertilizers in the agricultural sector.

Item Type: Article
Uncontrolled Keywords: Crosslinking · Swellability · Water retention · Fertilizer management · Controlled release
Divisions: PSG College of Arts and Science > Department of Chemistry
Depositing User: Mr Team Mosys
Date Deposited: 16 Mar 2023 08:50
Last Modified: 16 Mar 2023 08:50
URI: http://ir.psgcas.ac.in/id/eprint/1793

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