Abstract
An efficient method for covalently linking of cellulose and clay using a click chemistry based strategy is reported. Azide and alkynyl derivatives of silane were synthesized and used for silanization of cellulose and clay respectively. Functionalized cellulose and clay were then coupled using Cu(I) catalyzed azide–alkyne cycloaddition reaction, resulting in a covalent linkage between them. Successful synthesis of the silane derivates was established using Fourier transform infrared (FTIR) and nuclear magnetic resonance. Silanization of cellulose and clay with azide and alkynyl derivatives and the formation of a triazole linkage were confirmed using FTIR.
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Abbreviations
- APTES:
-
(3-aminopropyl)triethoxysilane
- DCC:
-
N,N’-dicyclohexylcarbodiimide
- DMAP:
-
4-dimethylaminopyridine
- DCM:
-
Dichloromethane
- DMSO:
-
Dimethylsulphoxide
- DMA:
-
Dimethylacetamide
- EtOAc:
-
Ethyl acetate
- EDC.HCl:
-
1-Ethyl-3-(3-dimethyllaminopropyl)carbodiimide hydrochloride
- PyBOP:
-
Benzotriazol-1-yl-oxytripyrrolidinophosphonium-hexafluorophosphat PyBOP
- HBTU:
-
O-Benzotriazole-N,N,N’,N’-tetramethyl-uronium-hexafluoro-phosphate
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Acknowledgments
The research was supported by Department of Science and Technology – Science and Engineering Research Board (DST-SERB), Grant number SERB/CESE/20120156. FTIR and NMR spectroscopy was done in the Chemistry department at IIT Kanpur. The authors are grateful to Prof. Amit Prashant of IIT Gandhinagar for generously donating kaolinite clay.
Conflict of interest
The authors declare no competing financial interest.
Funding Sources
This work is supported by DST-SERB (SR/S3/CE/038/2012).
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Yadav, P., Chacko, S., Kumar, G. et al. Click chemistry route to covalently link cellulose and clay. Cellulose 22, 1615–1624 (2015). https://doi.org/10.1007/s10570-015-0594-2
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DOI: https://doi.org/10.1007/s10570-015-0594-2