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Opal Hydrogels Derived by Sulfonation of Polystyrene Colloidal Crystals
Author(s) -
Yang Zhenzhong,
Li Dan,
Rong Jianhua,
Yan Weidong,
Niu Zhongwei
Publication year - 2002
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20020901)287:9<627::aid-mame627>3.0.co;2-u
Subject(s) - self healing hydrogels , materials science , sulfonic acid , polystyrene , chemical engineering , polymer chemistry , surface modification , template , sulfuric acid , colloid , layer (electronics) , nanotechnology , composite material , polymer , engineering , metallurgy
Opal hydrogels were prepared by sulfonation of dry polystyrene (PS) colloidal crystals with sulfuric acid, in which the introduced sulfonic acid and sulfone groups were responsible for the hydrophilic and crosslinked performances, respectively. The sulfonation occurred inwardly from the latex particles surface forming a hydrogel layer, whose thickness increased with temperature and modification time. The chemical compositions, water uptake and morphologies of the hydrogels were characterized. An application of the hydrogels as templates was demonstrated to prepare structured silica by a sol‐gel process.