Abstract
A novel biodegradable pH- and salinity-responsive cellulose copolymer was prepared by grafting 2-(Dimethylamino) ethylmethacrylate (DMAEMA) onto bagasse cellulose in ionic liquid. The grafting polymerization was achieved in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) under microwave irradiation. Copolymers were then characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and thermo gravimetric analysis measurements. The results revealed that polymer chains had been successfully bonded to the cellulose backbone. Furthermore, the self-assembly of cellulose-g-DMAEMA copolymers at various salt concentrations and pH solution were investigated by means of swelling behavior measurement. It indicated that the copolymers presented dual pH and salinity-responsive properties. The synthetic strategy showed great potential in the modification of other cellulosic biomass to afford new biomaterials with desired properties.
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Acknowledgments
We gratefully acknowledge the Fundamental Scientific Research Funds for Chinese Academy of Tropical Agricultural Sciences (No.1630062013012). The work is also partially supported by Major Science and Technology Projects of Hainan Province (ZDZX2013023-3).
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Wei, X., Chang, G., Li, J. et al. Preparation of pH- and salinity-responsive cellulose copolymer in ionic liquid. J Polym Res 21, 535 (2014). https://doi.org/10.1007/s10965-014-0535-z
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DOI: https://doi.org/10.1007/s10965-014-0535-z