Paper Title:
Preparation, Swelling and Water-Retention Properties of Crosslinked Superabsorbent Hydrogels Based on Guar Gum
  Abstract

Utilization of natural polymer as matrix for preparing hydrogels can improve the performance of the materials and render them environmentally friendly. In this work, the guar gum-g-poly(sodium acrylate) (GG-g-PNaA) superabsorbent hydrogels were prepared by the solution graft copolymerization of natural guar gum (GG) with partially neutralized acrylic acid (NaA) using ammonium persulfate (APS) as initiator and N,N′-methylenebisacrylamide (MBA) as crosslinker. FTIR spectra confirmed that NaA had been grafted on GG chains. The effects of reaction variables including the concentration of APS and MBA, the weight ratio of acrylic acid (AA) to GG and the neutralization degree of AA on water absorption were investigated. The superabsorbent hydrogel prepared under optimal condition gives the best absorption of 1107 g∙g–1 in distilled water and 88 g∙g–1 in 0.9 wt% NaCl solution. Effects of external pH on the swelling properties of hydrogels were investigated, and the practical water retention properties of the hydrogels were also evaluated. Results indicated that the hydrogels exhibited excellent pH-stability in a wide pH range from 4 to 11, and the water-retention capabilities of sand soils were also greatly improved after utilizing the superabsorbent hydrogels. This superabsorbent hydrogels could be used as potential eco-friendly water-saving materials for agricultural or ecological application.

  Info
Periodical
Edited by
Jinsheng Liang and Lijuan Wang
Pages
177-182
DOI
10.4028/www.scientific.net/AMR.96.177
Citation
W. B. Wang, A. Q. Wang, "Preparation, Swelling and Water-Retention Properties of Crosslinked Superabsorbent Hydrogels Based on Guar Gum", Advanced Materials Research, Vol. 96, pp. 177-182, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Lin Luo, Guang Fu Yin, Yun Zhang, Ya Dong Yao, Wei Zhong Yang, Yue Hua Wang
Abstract:Porous biodegradable scaffolds are widely used in bone tissue engineering to provide temporary templates for cellular attachment and matrix...
1545
Authors: Da Biao Zhao
Microwave Processing of Materials
Abstract:Graft copolymerization of acrylic acid(AA) on starch to prepare super absorbent resin (SAR) under microwave irradiation were investigated...
1335
Authors: Hang Bo Yue, Ying De Cui, Guo Qiang Yin, Zhen Yu Jia, Lie Wen Liao
Environmental Friendly Materials
Abstract:A novel class of environmentally friendly protein-based bioplastics—cottonseed protein plastic sheets (CP-sheets)—were prepared by...
1518
Authors: Li Zhang, You Nian Liu, Min Jie Zhou, Jian Hui Yan
Chapter 2: Pressure Control System, Mechanics and Material Science
Abstract:Oxygen generation from halate solution under ultraviolet irradiation was studied. The results show that with regard to KBrO3, KIO3, and KClO3...
377
Authors: Xiao Hua Wang
Chapter 2: Materials - Study, Modeling and Technologies
Abstract:Through suspension polymerization , the influences of different crosslinking agent, initiator, disperser and reaction temperature on oil...
222