Synthesis, characterization and swelling behavior of superabsorbent wheat straw graft copolymers

被引：85

作者：

Li, Qian ^{[1
]}

Ma, Zuohao ^{[1
]}

Yue, Qinyan ^{[1
]}

Gao, Baoyu ^{[1
]}

Li, Wenhong ^{[1
]}

Xu, Xing ^{[1
]}

机构：

[1] Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Jinan 250100, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2012年 / 118卷

基金：

中国国家自然科学基金;

关键词：

Superabsorbent; Wheat straw; Cellulose; Swelling; Deswelling; MODIFIED POLYSACCHARIDE; HYDROGEL; ACID; IRRADIATION; COMPOSITES; KINETICS; CHITOSAN; REMOVAL;

D O I：

10.1016/j.biortech.2012.03.028

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Swelling behavior is an important characteristic for superabsorbents. A wheat straw-based superabsorbent (WS-SAB) was prepared by graft copolymerization of acrylic acid, acrylic amide and dimethyl diallyl ammonium chloride onto the cellulose of wheat straw, and its swelling and deswelling behavior was investigated. The product had a water absorbency of 133.76 g/g in distilled water and 33.83 g/g in 0.9 wt.% NaCl solution. Fourier transform infrared spectroscopy and scanning electron microscopy indicated that the monomers were successfully grafted onto the wheat straw. The largest swelling capacity was at pH 6. The effect of ions on the swelling was in the order: Na+ > K+ > Mg2+ > Ca2+ and Cl- > SO42-. The swelling capacity did not change after several times of water absorption and release. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：204 / 209

页数：6

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