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	Effects of modified vermiculite on water absorbency and swelling behavior of chitosan-g-poly(acrylic acid)/vermiculite superabsorbent composite
	Xie, Yuntao1,2; Wang, Aiqin1
刊名	Journal of composite materials
	2009-10-01
卷号	43期号:21页码:2401-2417
关键词	Chitosan Modified vermiculite Superabsorbent composite Swelling
ISSN号	0021-9983
DOI	10.1177/0021998309344644
通讯作者	Wang, aiqin(aqwang@lzb.ac.cn)
英文摘要	In this study, a series of chitosan-g-poly(acrylic acid)/vermiculite (cts-g-paa/vmt) superabsorbent composites containing vmt, acid-activated, ion-exchanged, and organic modified vmt were synthesized by free-radical graft polymerization in aqueous solution, using n,n'-methylenebisacrylamide as a crosslinker and ammonium persulfate as an initiator. the effects of vmt and modified vmt on equilibrium water absorbency, swelling rate, and swelling behavior in various cationic saline solutions (nacl, cacl(2), and fecl(3)) and different ph value solution of superabsorbent composites were systematically investigated. ftir spectroscopy confirmed that acrylic acid had been grafted onto cts and the -oh groups of vmt participated reaction. the introduction of acid-activated, ion-exchanged, and organic modified vmt into chitosan-g-poly(acrylic acid) polymeric network could improve water absorbency and swelling rate compared with that of vmt. the water-absorbing capacity of superabsorbent composites decrease gradually with the increasing of the concentration of nacl, cacl(2), and fecl(3) solutions from 0.01 to 10 mm. the all prepared samples have similar swelling behavior in different ph value solution and the equilibrium water absorbencies of samples keep roughly constant in the ph range from 4 to 12.
WOS关键词	CASSAVA STARCH ; HYDROGELS ; NANOCOMPOSITES ; ATTAPULGITE ; POLYMER ; PERFORMANCE ; ABSORPTION ; HUMATE
WOS研究方向	Materials Science
WOS类目	Materials Science, Composites
语种	英语
出版者	SAGE PUBLICATIONS LTD
WOS记录号	WOS:000270067800006
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2398401
专题	中国科学院大学
通讯作者	Wang, Aiqin
作者单位	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
推荐引用方式 GB/T 7714	Xie, Yuntao,Wang, Aiqin. Effects of modified vermiculite on water absorbency and swelling behavior of chitosan-g-poly(acrylic acid)/vermiculite superabsorbent composite[J]. Journal of composite materials,2009,43(21):2401-2417.
APA	Xie, Yuntao,&Wang, Aiqin.(2009).Effects of modified vermiculite on water absorbency and swelling behavior of chitosan-g-poly(acrylic acid)/vermiculite superabsorbent composite.Journal of composite materials,43(21),2401-2417.
MLA	Xie, Yuntao,et al."Effects of modified vermiculite on water absorbency and swelling behavior of chitosan-g-poly(acrylic acid)/vermiculite superabsorbent composite".Journal of composite materials 43.21(2009):2401-2417.

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