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Adsorption of Cu 2+ ions with poly( N ‐isopropylacrylamide‐ co ‐methacrylic acid) micro/nanoparticles
Author(s) -
Wu Qinglin,
Tian Peng
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28450
Subject(s) - adsorption , lower critical solution temperature , methacrylic acid , particle size , metal ions in aqueous solution , nanoparticle , copper , materials science , polymer , poly(n isopropylacrylamide) , ion , inorganic chemistry , particle (ecology) , chelation , polymer chemistry , chemistry , nuclear chemistry , chemical engineering , copolymer , organic chemistry , nanotechnology , oceanography , geology , engineering
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