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题名: Preparation of poly(acrylic acid-co-acrylamide)/kaolin and release kinetics of urea from it
作者: Liang, R; Liu, MZ(柳明珠)
收录类别: SCIE ; EI
出版日期: 2007-12-05
刊名: JOURNAL OF APPLIED POLYMER SCIENCE
卷号: 106, 期号:5
出版者: WILEY
出版地: HOBOKEN
英文摘要: A series of poly(acrylic acid-co-acrylamide)/ kaolin [poly(AA-co-Am) /kaolin] composites were prepared by aqueous solution copolymerization of partially neutralized acrylic acid and acrylamide in the presence of kaolin nanopowder, which was synthesized to act as a release carrier of urea fertilizer. The superabsorbent composite was swollen in aqueous solution of urea to load urea, and the effect of urea concentration on the swelling was investigated. Furthermore, the effects of the contents of crosslinker, kaolin, and acrylamide, the neutralization degree of acrylic acid, and temperature, pH, and ionic strength of release medium on water absorbency and diffusion coefficient of urea release from poly(AA-co-Am) /kaolin were studied systematically. It was found that urea loading percentage could be adjusted by urea concentration of swelling medium, and urea diffusion coefficient could be regulated through the contents of crosslinker, kaolin, and acrylamide, and the neutralization degree of acrylic acid. Additionally, temperature and ionic strength of release medium may also affect the urea release process. The conclusions obtained could provide theoretical basis for urea diffusion behavior in superabsorbent used in agriculture. (c) 2007 Wiley Periodicals, Inc.
关键词: poly(AA-co-Am)/kaolin ; urea ; water absorbency ; diffusion coefficient ; mesh size
作者部门: Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China ; Henan Normal Univ, Coll Chem & Environm Sci, Xinxiang 453007, Peoples R China
通讯作者: Liu, MZ (reprint author), Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China.
学科分类: Polymer Science
文章类型: Article
语种: 英语
DOI: 10.1002/app.26919
ISSN号: 0021-8995
WOS记录号: WOS:000250410500020
EI记录号: 20074610919997
第一机构:
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/77803
Appears in Collections:化学化工学院_期刊论文

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Recommended Citation:
Liang, R; Liu, MZ.Preparation of poly(acrylic acid-co-acrylamide)/kaolin and release kinetics of urea from it,JOURNAL OF APPLIED POLYMER SCIENCE,2007,106(5):
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