Abstract
A potential alternative to achieve smart materials for biomedical applications is the combination of natural and synthetic polymers. In order to understand the structure and properties of two γ-radiation grafted biopolymers, chitosan-g-poly(N-isopropylacrylamide) (CS/PNIPAAm) and cotton-g-2-(dimethylamino) ethyl methacrylate (CG-DMAEMA) were analyzed by solid state nuclear magnetic resonance (SSNMR) 13C-CPMAS at different contact times (tCP). The use of different tCP in this grafted biopolymers showed that chemical shifting, broadening, size and symmetry of the some signals, gives important information for structure elucidation and molecular mobility. SSNMR spectra indicate changes in the local order structure, CG suffered less modifications when it is grafted than CS. CG-g-DMAEMA spectrum is very similar to CG spectrum, in contrast with spectrum of CS-g-NIPAAm, is very different than CS. Spectra of swelling polymers in water showed more structural information about secondary structure.
Similar content being viewed by others
References
H. Saito, I. Ando and A. Naito, Solid State NMR Spectroscopy for Biopolymers: Principles and Applications (Springer, The Netherlands,} (2006), p. 1-2, 289, 296–309.
M. A. Luna-Straffon, G. Cedillo, and E. Bucio, in Radiation-Grafting of Cotton-g-DMAEMA for Biomedical Applications, Edited by J. Godinez, L. Fomina, G. Cedillo and M. P. Carreon-Castro, (Mater. Res. Soc. Symp. Proc. Vol. 1483, Cancun, México, 2012).
A. Sosnik Et Al. Temperature sensitive behavior of poly(N-isopropylacrylamide) grafted onto chitosane by gamma-irradiation (unpublished).
Jerschow., Angew Chem. Int. Ed., 41, 3096–3129 (2002)
G. Facey (Private communication).
C. Lorthioir., Macromolecules, 42, 218–230 (2009)
S. Perrier., Chem. Soc. Rev., 38, 2046–2064 (2009).
T. Heinze. Prog. Polym. Sci.26, 1689–1762 (2001).
K. V. Harish Prashanth and R.N. Tharanathan, Carbohydrate Polymers 54, 343–351 (2003)
C. Alvarez-Lorenzo., Cellulose, 19, 2165–2177 (2012).
Acknowledgements
The authors thank to Eng. F. Silvar, Sr. C. González, Eng. A. López and Eng. Joaquin Morales from IIM-UNAM for their technical assistance.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cedillo, G., Bucio, E. Solid State NMR Analysis of Two Grafted Biopolymers. MRS Online Proceedings Library 1767, 113–118 (2015). https://doi.org/10.1557/opl.2015.234
Published:
Issue Date:
DOI: https://doi.org/10.1557/opl.2015.234