Premium
Sustained release of iodine from a polymeric hydrogel device for water disinfection
Author(s) -
Punyani Supriya,
Narayanan Priya,
Vasudevan Padma,
Singh Harpal
Publication year - 2006
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.25496
Subject(s) - ammonium persulfate , differential scanning calorimetry , self healing hydrogels , monomer , methacrylate , iodine , fourier transform infrared spectroscopy , potassium persulfate , polymer chemistry , persulfate , materials science , polymerization , radical polymerization , polymer , nuclear chemistry , scanning electron microscope , chemical engineering , chemistry , organic chemistry , composite material , catalysis , physics , engineering , metallurgy , thermodynamics
2‐Hydroxyethyl methacrylate (HEMA) based polymeric hydrogels were synthesized by free‐radical redox bulk polymerization technique using 1% ethyleneglycol dimethacrylate (EGDMA) as crosslinking monomer and ammonium persulfate (APS) and N , N , N ′, N ′‐tetramethyl ethylenediamine (TEMED) as redox initiator. Polymeric hydrogel samples were loaded with solid elemental iodine. Thermal and physical characteristics of polymer before loading and after 3 months release of iodine were evaluated by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). On immersing in water, different forms of iodine were released from the hydrogel device. The amount and rate of release of I − and I 3 −were measured by analytical techniques. Released iodine species showed broad spectrum antimicrobial properties and release was sustained for about 120 days. Polymeric hydrogel iodine‐based system developed can be used as a device for controlled release of iodine species at concentration levels sufficient for disinfection to get potable water. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3334–3340, 2007