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Synthesis and property of temperature and pH sensitive xanthan-MA/PNIPAAm hydrogels

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Abstract

A novel class of xanthan-maleic anhydride (Xan-MA)/poly(N-isopropylacrylamide) hybrid hydrogels was designed and synthesized by solution polymerization. The xanthan-based precursor (Xan-MA) was prepared by substituting the hydroxyl groups in Xan by MA. This Xan-MA precursor was then polymerized with a known temperature sensitive precursor (N-isopropylacrylamide, NIPAAm) to form hybrid hydrogels with a series range of composition ratio of Xan-MA to NIPAAm precursors. These smart hydrogels were characterized by Fourier transform infrared spectroscopy for structural determination, differential scanning calorimertry for thermal property. And maximum swelling ratio, swelling kinetics and temperature response kinetics were studied. The data obtained clearly show that these smart hydrogels are responsive to the external changes of temperature as well as pH value. The magnitudes of smart and hydrogel properties of these hybrid hydrogels depend on the feed composition ratio of the two precursors. With the increase of the content of Xan-MA the maximum swelling ratio, reswelling ratio and thermo-sensitivities increase, and the feed composition ratio of Xan-MA/NIPAAm increases the maximum swelling ratio augment from 13.88 to 23.21. From XMN0, XMN1, XMN3 to XMN5, the lower critical solution temperatures (LCSTs) are 33.02, 36.15, 40.28 and 41.92 °, respectively. By changing the composition ratio of these two precursors, the LCST of the hybrid hydrogels could also be adjusted to be or near the body temperature for the potential applications in bioengineering and biotechnology fields.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China

    Qing-de Long  (隆清德), Chun-yue Pan  (潘春跃), Yan-hua Meng  (孟艳华), Bao-jin Zhang  (张报进) & Cheng-xi Xu  (许晨曦)

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  1. Qing-de Long  (隆清德)
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  2. Chun-yue Pan  (潘春跃)
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  3. Yan-hua Meng  (孟艳华)
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  4. Bao-jin Zhang  (张报进)
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  5. Cheng-xi Xu  (许晨曦)
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Correspondence to Chun-yue Pan  (潘春跃).

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Long, Qd., Pan, Cy., Meng, Yh. et al. Synthesis and property of temperature and pH sensitive xanthan-MA/PNIPAAm hydrogels. J. Cent. South Univ. Technol. 16, 66–72 (2009). https://doi.org/10.1007/s11771-009-0011-9

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  • DOI: https://doi.org/10.1007/s11771-009-0011-9

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