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Thermosensitive poly (N-isopropylacrylamide) hydrophobic associated hydrogels: optical, swelling/deswelling, and mechanical properties

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Abstract

Thermosensitive hydrophobic associated hydrogels (NI-HA gels) were prepared by free radical micellar copolymerization in aqueous solution of N-isopropylacrylamide, a small amount of hydrophobic monomer octylphenol polyoxyethylene (4) acrylate (OP4~AC), and nonionic surfactants. The mechanical properties, swelling/deswelling behaviors, and optical transmittances of NI-HA gels were studied. As OP4~AC content varied, both mechanical properties and swelling behaviors of gels changed greatly. The temperature-induced changes in optical transmittance and deswelling tests showed that NI-HA gels had rapid temperature responsive rate and clear volume phase transitions at around 34 °C, and these properties had almost no concern with OP4~AC content. Furthermore, NI-HA gels also possessed extremely sensitive swelling/deswelling switch behaviors and well swelling stabilities.

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Abbreviations

PNIPAM:

Poly (N-isopropylacrylamide)

OP4~AC:

Octylphenol polyoxyethylene (4) acrylate

OP10:

Octylphenol polyoxyethylene (10)

LCST:

Lower critical solution temperature

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Acknowledgements

The authors acknowledge financial support from Natural Sciences Foundation of China (NO.21174053).

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Authors and Affiliations

  1. College of Chemistry, Jilin University, Changchun, 130012, China

    Chang Liu, Jingfeng Yu, Xiaoli Liu, Zhiying Li, Ge Gao & Fengqi Liu

  2. Daqing Oilfield Exploration and Development Research Institute, Daqing, 163453, China

    Guoqing Jiang

Authors
  1. Chang Liu
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  2. Jingfeng Yu
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  3. Guoqing Jiang
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  4. Xiaoli Liu
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  5. Zhiying Li
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  6. Ge Gao
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  7. Fengqi Liu
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Correspondence to Fengqi Liu.

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Liu, C., Yu, J., Jiang, G. et al. Thermosensitive poly (N-isopropylacrylamide) hydrophobic associated hydrogels: optical, swelling/deswelling, and mechanical properties. J Mater Sci 48, 774–784 (2013). https://doi.org/10.1007/s10853-012-6794-3

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