Synthesis, characterization and swelling behaviors of sodium alginate-g-poly(acrylic acid)/sodium humate superabsorbent

被引：169
作者：
Hua, Shuibo [1 ,2 ]
Wang, Aiqin [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, Lanzhou 730000, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
来源：
CARBOHYDRATE POLYMERS | 2009年 / 75卷 / 01期
关键词：
Superabsorbent; Sodium alginate; Sodium humate; Water absorbency; Swelling behavior; CONTROLLED-RELEASE; HUMIC ACIDS; COMPOSITE; COPOLYMERS; HYDROGELS; STARCH; METHACRYLATE); FERTILIZER; POLYMER; BEADS;
D O I：
10.1016/j.carbpol.2008.06.013
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A novel sodium alginate-g-poly(acrylic acid)/sodium humate superabsorbent was prepared by graft copolymerization with sodium alginate, acrylic acid and sodium humate in aqueous solution, using N,N'-methylenebisacrylamide as a crosslinker and ammonium persulfate as an initiator. The effects of crosslinker, sodium alginate and sodium humate content on water absorbency of the superabsorbent were studied. The swelling behavior in solutions of various pH and the swelling kinetics in saline solutions (5 mmol/L NaCl and CaCl2) were also investigated. The results from IR analysis showed that both sodium alginate and sodium humate react with the acrylic acid monomer during the polymerization process. The introduction of sodium humate into the sodium alginate-g-poly(acrylic acid) system could enhance the water absorbency and the superabsorbent containing 10 wt% sodium humate acquired the highest water absorbency (1380 g/g in distilled water and 83 g/g in 0.9 wt% NaCl solution). (C) 2008 Elsevier Ltd. All rights reserved.
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收藏
页码：79 / 84
页数：6
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