کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5210547 | 1382900 | 2011 | 8 صفحه PDF | دانلود رایگان |
Optically active macroporous poly(N-isopropylacrylamide) (PNIPAM) hydrogels were synthesized via free radical copolymerization of NIPAM, helical macromonomer, and cross-linker N,Nâ²-methylenebisacrylamide. The helical macromonomer not only contained catechol groups but also vinyl groups in side chains. Polyethylene glycols were used as pore-forming agent to give rise to macroporous structures in the optically active hydrogels. The hydrogels were characterized by FT-IR, SEM, DSC, swelling ratio and circular dichroism spectra analyses and exhibited the expected optical activity and macroporous architectures. The chiral resolution tests demonstrated the preferential adsorption of the hydrogels towards d-tryptophan and d-phenylalanine in the corresponding two amino acid enantiomers.
Journal: Reactive and Functional Polymers - Volume 71, Issue 9, September 2011, Pages 972-979