期刊
POLYMERS FOR ADVANCED TECHNOLOGIES
卷 19, 期 12, 页码 1852-1859出版社
WILEY
DOI: 10.1002/pat.1215
关键词
guar gum; attapulgite; superabsorbent composite; graft copolymerization; swelling
资金
- West Light Foundation
- Western Action Project of CAS [KGCX2-YW-501]
- Ministry of Science and Technology, P. R. China [2006AA03Z0454]
- [2006AA100215]
Utilization of raw materials available in nature and their application to derive other useful products without any adverse impact on the environment has long been a desired goal. In this work, guar gum (GG) and attapulgite (APT) clay were used as raw materials for preparing guar gum-g-poly(acrylic acid)/attapulgite (GG-g-PAA/APT) superabsorbent composites through the graft copolymerization of GG, partially neutralized acrylic acid (AA) and APT in aqueous solution. The effects of reaction conditions such as concentrations of the initiator and crosslinker, APT content, etc. on water absorbency were investigated. The composite prepared under optimal conditions gave the best absorption of 529 g/g sample in distilled water and 61 g/g sample in 0.9 wt% NaCl solution. Swelling behaviors revealed that the superabsorbent composites retained a high water absorbency over a wide pH range of 4-11, and the developed composites also exhibited improved reswelling and water-retention capabilities. The superabsorbent composites can be utilized as eco-friendly water-manageable materials for agricultural and horticultural applications. Copyright (C) 2008 John Wiley & Sons, Ltd.
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