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Crosslinker effects on swelling and gel properties of pH- and temperature-responsive poly (NIPAM/IA/AM) hydrogels

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Abstract

A novel pH- and temperature-responsive poly (N-isopropyl acrylamide/itaconic acid/acrylamide)(NIPAM/IA/AM) hydrogel was synthesized by inverse microemulsion polymerization and crosslinker effects on its swelling and gel properties were investigated. Water absorbency and salt solution absorbency increased with crosslinker amount increased to 0.2 wt%, and then decreased, while pH-sensitivity decreased and gel strength, temperature-and shear- resistance increased with increased crosslinker amount. The average particle size of the NIPAM/IA/AM hydrogels synthesized at crosslinker amount of 0.2 and 0.4 wt%, increased from 0.45 and 0.38 μm to 11.86 and 9.88 μm, respectively, with swelling time from 1 to 15 h. The NIPAM/IA/AM hydrogel demonstrated shear-thinning behavior and increased gel strength from 25 to 35 °C.

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Acknowledgments

The authors gratefully acknowledge the financial support of PetroChina Innovation Foundation, China (Grant No. 2012D-5006-0212), Sichuan Provincial Science and Technology Pillar Program, China (Grant No. 2013GZ0149), Opening fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, China (Grant No. SKLGP2012K004) and the Sichuan Youth Science and Technology Innovation Research Team Funding Scheme, China (Grant No. 2013TD0005).

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Authors and Affiliations

  1. State Key Lab of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China

    Tao Wan & Qihua Zhao

  2. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu University of Technology, Chengdu, 610059, China

    Tao Wan, Jing Xiong, Li Tang, Ling Liao & Qiaohe Chen

  3. PetroChina Sichuan Petrochemical Co., Ltd, Chengdu, Sichuan, 611930, China

    Daqing Wu

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  1. Tao Wan
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  2. Jing Xiong
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  3. Qihua Zhao
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  4. Daqing Wu
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  5. Li Tang
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  6. Ling Liao
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  7. Qiaohe Chen
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Correspondence to Tao Wan or Qihua Zhao.

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Wan, T., Xiong, J., Zhao, Q. et al. Crosslinker effects on swelling and gel properties of pH- and temperature-responsive poly (NIPAM/IA/AM) hydrogels. Polym. Bull. 73, 1447–1458 (2016). https://doi.org/10.1007/s00289-015-1557-3

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  • DOI: https://doi.org/10.1007/s00289-015-1557-3

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