Abstract
In order to investigate the effect of the substitution groups on the intercalation, nine quaternized carboxymethyl chitosans (QCMCs) with different degree of substitution (DS) of carboxymethyl and quaternary ammonium groups were intercalated into the interlayer of organic montmorillonite (OMMT). Small-angle XRD, TEM and FT-IR techniques were used to characterize the structure and morphology of QCMC/OMMT nanocomposites, the thermogravity analysis (TGA) was performed to evaluate the thermal stability. The results revealed that positively charged quaternary ammonium groups contributed to the intercalation of QCMC, certain amount of negatively charged carboxymethyl groups could also induce better intercalation, but too much carboxymethyl groups prevented the entrance of QCMC into the interlayer of OMMT. In addition, as carboxymethyl and quaternary ammonium groups increased, the interaction between QCMC and OMMT was stronger, but the thermal stability was lower. When DS of carboxymethyl groups and quaternary ammonium groups in QCMC were respectively 53 % and 41 %, the exfoliated nanocomposite was obtained, in this case, its thermal stability was the highest.
Keywords: Quaternized carboxymethyl chitosan, organic montmorillonite, intercalation, nanocomposite, degree of substitution, thermal stability
Current Nanoscience
Title:Quaternized Carboxymethyl Chitosan/Organic Montmorillonite Nanocomposite: Effect of Carboxymethyl and Quaternary Ammonium Groups
Volume: 9 Issue: 1
Author(s): Jiwen Luo, Qiuyun Zhang, Xiaoying Wang and Runcang Sun
Affiliation:
Keywords: Quaternized carboxymethyl chitosan, organic montmorillonite, intercalation, nanocomposite, degree of substitution, thermal stability
Abstract: In order to investigate the effect of the substitution groups on the intercalation, nine quaternized carboxymethyl chitosans (QCMCs) with different degree of substitution (DS) of carboxymethyl and quaternary ammonium groups were intercalated into the interlayer of organic montmorillonite (OMMT). Small-angle XRD, TEM and FT-IR techniques were used to characterize the structure and morphology of QCMC/OMMT nanocomposites, the thermogravity analysis (TGA) was performed to evaluate the thermal stability. The results revealed that positively charged quaternary ammonium groups contributed to the intercalation of QCMC, certain amount of negatively charged carboxymethyl groups could also induce better intercalation, but too much carboxymethyl groups prevented the entrance of QCMC into the interlayer of OMMT. In addition, as carboxymethyl and quaternary ammonium groups increased, the interaction between QCMC and OMMT was stronger, but the thermal stability was lower. When DS of carboxymethyl groups and quaternary ammonium groups in QCMC were respectively 53 % and 41 %, the exfoliated nanocomposite was obtained, in this case, its thermal stability was the highest.
Export Options
About this article
Cite this article as:
Luo Jiwen, Zhang Qiuyun, Wang Xiaoying and Sun Runcang, Quaternized Carboxymethyl Chitosan/Organic Montmorillonite Nanocomposite: Effect of Carboxymethyl and Quaternary Ammonium Groups, Current Nanoscience 2013; 9 (1) . https://dx.doi.org/10.2174/1573413711309010020
DOI https://dx.doi.org/10.2174/1573413711309010020 |
Print ISSN 1573-4137 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6786 |

- Author Guidelines
- Bentham Author Support Services (BASS)
- Graphical Abstracts
- Fabricating and Stating False Information
- Research Misconduct
- Post Publication Discussions and Corrections
- Publishing Ethics and Rectitude
- Increase Visibility of Your Article
- Archiving Policies
- Peer Review Workflow
- Order Your Article Before Print
- Promote Your Article
- Manuscript Transfer Facility
- Editorial Policies
- Allegations from Whistleblowers