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01-05-2024 | Original Paper

Synthesis, swelling and water-retention behaviors of phytic acid-modified corn stalk-composite superabsorbents

Authors: Bingjun Liu, Tao Wan, Dongmei Li, Zhenggen Huang, Hao Xu, Yang Zhao

Published in: Journal of Polymer Research | Issue 5/2024

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Abstract

A novel phytic acid-modified corn stalk-composite superabsorbent (PACS-g-p(AA-AM-VP)) with water absorbency of 391 g/g, water retention around 30% at 200 min under 90 °C, adsorption capacities of 284 mg/g and 448 mg/g for Ni(II) and Cu (II), respectively, was synthesized by graft copolymerization of acrylamide(AM), vinyl pyrrolidone(VP) and itaconic acid(IA) with phytic acid-modified corn stalk (PACS) in aqueous solution, using N,N-methylenebisacrylamide (MBA) as a crosslinker and ammonium persulfate (APS) and sodium bisulfite (SBS) as redox initiator. Factors influencing water absorbency and water retention of PACS-g-p (AA-AM-VP), such as PACS amount, initiator amount, crosslinker amount, neutralization degree of IA, IA/VP mass ratio and IA/AM mass ratio, were investigated. Morphologies and structure of PACS-g-p (AA-AM-VP) were characterized by FTIR and SEM. FTIR spectra indicate the structure of phytic acid-modified corn stalk graft-copolymer. SEM data shows that fiber structure of corn stalk is partially destroyed after phytic acid modification under ultrasonic wave. PACS-g-p (AA-AM-VP) has a coarse, fluffy and porous structure, facilitating the permeation of water and heavy metal ions into the polymeric network. Given these properties, PACS-g-p (AA-AM-VP) can be extensively applied in agriculture and horticulture as a water-retaining and soil remediation material which increases agricultural irrigation efficiency and remediates heavy metal-contaminated soil due to its low cost, environmental friendliness, high water retention and good adsorption for heavy metal ions.

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Metadata
Title
Synthesis, swelling and water-retention behaviors of phytic acid-modified corn stalk-composite superabsorbents
Authors
Bingjun Liu
Tao Wan
Dongmei Li
Zhenggen Huang
Hao Xu
Yang Zhao
Publication date
01-05-2024
Publisher
Springer Netherlands
Published in
Journal of Polymer Research / Issue 5/2024
Print ISSN: 1022-9760
Electronic ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-024-03987-5

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