期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 282, 期 -, 页码 498-503出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2006.02.052
关键词
surface-initiated; atom transfer radical polymerization; polyacrylamide; attapulgite; adsorption properties
Well-defined polyacrylamide was grafted successfully from the fibrillar clay, attapulgite, by a three-step process: (i) the gamma-aminopropyltriethoxyl silane was chemical-bonded onto the surfaces of the attapulgite; (ii) the surface amino groups were amidated with bromoacetylbromide; and (iii) the bromo-acetamide modified attapulgite was used as macro-initiator for the surface-initiated atom transfer radical polymerization (SI-ATRP) of acrylamide with the catalyst of the complex of 1,10-phenanthroline and Cu(I)Br. The percentage of grafting (PG%) was found to increase linearly with the increasing of the polymerizing time and that of 21.4% was achieved after the SI-ATRP in aqueous solution at 90 degrees C for 6 h. The graft polymerizations exhibited the characteristics of a controlled/living polymerization. The product, polyacrylamide grafted attapulgite (PAM-ATP), had been characterized with elemental analysis (EA), Fourier transform infrared (FI-IR) spectroscopy analysis, thermogravimetric analysis (TGA), and transmission electron microscopy (TEM). It's adsorption properties towards the heavy metal ion (Hg(II)) and dyes (methylene blue (MB) and methyl orange (MO)) were also studied preliminarily. (c) 2006 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据