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Pranee Lertsutthiwong Khanittha Noomun Srichalai Khunthon Sarintorn Limpanart 《自然科学进展(英文版)》2012,22(5):502-508
Chitosan–montmorillonite is a modified montmorillonite in which the sodium ions in
montmorillonite layers are replaced by biopolymeric chitosan. The effects of characteristics of
chitosan (i.e. molecular weight and degree of deacetylation) and the chitosan/montmorillonite mass
ratio on the properties of chitosan–montmorillonite were investigated. Thermogravimetric analysis,
zeta potential and X-ray diffraction results confirmed intercalation of chitosan into montmorillonite
layers. An interaction between chitosan and montmorillonite was revealed by FTIR and the
zeta potential. The amount of chitosan intercalated into the montmorillonite layers depended on
the characteristics of chitosan, with the largest amounts of intercalated chitosan achieved by
addition of chitosan with a molecular weight of 71,000 g/mol or a degree of deacetylation of 80% at
a fixed chitosan/montmorillonite mass ratio of 2:1. The resulting chitosan–montmorilllonite had
good adsorbent properties, especially for adsorption of cationic dyes, and also inhibited E. coli by
almost 100%. The chitosan–montmorillonite may be useful as a functional material for dye
adsorption and antibacterial applications. 相似文献
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