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Preparation of carboxymethyl cellulose‐g‐poly (acrylamide)/montmorillonite superabsorbent composite as a slow‐release urea fertilizer
Author(s) -
Kenawy ElRefaie,
Azaam Mohamed M.,
Elnshar Esraa M.
Publication year - 2018
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4315
Subject(s) - potassium persulfate , carboxymethyl cellulose , swelling capacity , materials science , montmorillonite , swelling , acrylamide , urea , composite number , copolymer , nuclear chemistry , fourier transform infrared spectroscopy , polymer chemistry , potassium , thermogravimetric analysis , cellulose , superabsorbent polymer , ammonium persulfate , chemical engineering , polymerization , sodium , composite material , polymer , chemistry , organic chemistry , engineering , metallurgy
A superabsorbent composite was synthesized through free‐radical graft copolymerization of carboxymethyl cellulose, acrylamide, and montmorillonite by means of a crosslinker such as N , N ′‐methylenebisacrylamide and potassium persulfate as an initiator. The preparation mechanism was proposed, and the composite structures were confirmed by using Fourier transform infrared spectroscopy, X‐ray diffraction, thermal gravimetric analysis, and scanning electron microscope. The factors influencing the swelling capacity of the composite were determined to accomplish the highly swelling capacity. The composition (15 wt% carboxymethyl cellulose, 5.4 wt% montmorillonite, 82 wt% acrylamide, 0.07 wt% N , N ′‐methylenebisacrylamide, and 1.1 wt% potassium persulfate) exhibited high swelling capacity; it was selected to be loaded with urea fertilizer, and the release was investigated by measuring the conductivity. The results showed that the new controlled release system has good slow release properties.