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Citation: SHI Guang, CHEN Jin-Long, HU Xiao-Yan, ZHANG LI, SUN Feng-Qiang. Intercalation of Different Molar Mass Chitosan in Montmorillonite[J]. Chinese Journal of Applied Chemistry, ;2009, 26(3): 263-267. shu

Intercalation of Different Molar Mass Chitosan in Montmorillonite

1.
South China Normal University, Department of Chemistry and Environment, Guangzhou 510006

Corresponding author: SHI Guang,
Received Date: 4 February 2008
Available Online: 18 June 2008
Fund Project: 国家自然科学基金(50503008)资助项目 (50503008)

The objective of this work is to study the effect of molar mass of chitosan(CS) on its intercalation in Na+-montmorillonite.Chitosan/montmorillonite intercalate nanocomposites with chitosan of different molar masses were successfully prepared via solution-mixing technique.Their structures were characterized by XRD,TEM and FT-IR techniques.The results show that after it was treated by diluted acetic acid solution,the interlayer distance of montmorillonite could be expended to 1.55 nm compared to originally 1.3 nm because of the existence of acetic acid residue;the interlayer distance of layered silicates in the intercalate nanocompo-sites enlarged as molar mass of chitosan decreased.When the molar mass was 4.1×10⁴,the largest interlayer distance of 2.48 nm was obtained.However,with further decrease of the molar mass,the interlayer distance of the layered silicates in the intercalate nanocomposites reduced.Strong static interaction among chitosan and montmorillonite existed in the intercalate nanocomposites.The thermal stability of the intercalate nanocompo-sites were characterized by TGA.Amount of chitosan content in the intercalate nanocomposites increased as molar mass of chitosan decreased.The thermal stability of CS in the intercalate nanocomposites decreased due to the acetic acid residue in the composite.
- chitosan,
- montmorillonite,
- molar mass,
- intercalated nanocomposite
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