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Adsorption of Cu2+ ions with poly(N-isopropylacrylamide-co-methacrylic acid) micro/nanoparticles

✍ Scribed by Qinglin Wu; Peng Tian

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
109 KB
Volume
109
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Chelation efficiency of stimuli‐responsive poly(N‐iospropylacrylamide‐co‐methyacrylic acid) (PNIPAAm‐MAA) nanoparticles with Cu^2+^ ions from CuSO~4~·5H~2~O solution and from wood treated with copper‐based preservatives was studied. It was shown that particle size played a very important role in the adsorption process. The nano‐scale particles showed much improved Cu ion adsorption efficiency, compared with the micro hydrogels. The amount of Cu ion adsorption increased with increase of MAA ratio in copolymers and adsorption efficiency decreased with increased particle size. Furthermore, the adsorption amount varied with adsorption temperature at temperatures both below and above the corresponding low critical solution temperature (LCST). The high adsorption efficiency of Cu ions by PNIPAAm‐MAA polymer particles provides an effective technique for recovering metal ions (e.g., Cu^2+^) from wood treated with metal‐based preservatives. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

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