Synthesis and aqueous solution behavior of phosphonate-functionalized chitosans |
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| Authors: | Hongmei Kang Junjie Deng Haijia Zhang Yufang Tang Pengsheng Liu |
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| Affiliation: | Institute of Polymer Science and Engineering, College of Chemistry, Xiangtan University, Xiangtan 411105, PR China |
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| Abstract: | A series of novel phosphonate-functionalized pH-responsive chitosans were directly synthesized via Michael addition of chitosan with mono-(2-acryloyloxyethyl) phosphonate. The conformational and phase transitions of these phosphonate-functionalized chitosans were investigated by turbidity and UV-vis spectroscopy studies. The results indicated that the inter- or intra-chain electrostatic interactions of the phosphonate-functionalized chitosans could be controlled via adjusting the solution pH, leading to the reversible conformational and phase transitions of these chitosans. These phosphonate-functionalized chitosans exhibited typical anti-polyelectrolyte effect and polyelectrolyte effect. |
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| Keywords: | Chitosan pH-responsive Polyelectrolyte Anti-polyelectrolyte Conformational transition |
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