Smart pH/temperature Sensitive Hydrogels with Tailored Transition Temperature

Authors

  • Rodolfo Salgado-Rodríguez Instituto Tecnológico de Tijuana
  • Ángel Licea-Claverie Instituto Tecnológico de Tijuana
  • Arturo Zizumbo-López Instituto Tecnológico de Tijuana
  • Karl-Friedrich Arndt Dresden University of Technology

DOI:

https://doi.org/10.29356/jmcs.v57i2.223

Keywords:

Smart polymers, polymer gels, N-isopropylacrylamide, hydrogels, swelling

Abstract

Dual pH- and temperature-sensitive hydrogels have been prepared based on N-isopropylacrylamide (NIPAAm) and either potassium 5-methacryloyloxy-pentanoate (M4K) or potassium11-methacryloyloxy-undecanoate (M10K) as comonomers. The gels containing M10K (longer methylene chain) showed a slightly lower swelling capacity than the gels containing M4K. Hydrogels were produced with specific phase transition temperature (Tcr) in the range from 12 to 76 oC for NIPAAm-C4 hydrogels (containing M4K) and from 16 to 36 oC for NIPAAm-C10 hydrogels (containing M10K) by controlling: the type and comonomer content, and the pH of water. The type of transition changes from discontinuous (below the critical pH of the acid comonomer) to continuous (above de critical pH of the acid comonomer). The title hydrogel materials are promising candidates for biomedical applications.

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Author Biographies

Rodolfo Salgado-Rodríguez, Instituto Tecnológico de Tijuana

Centro de Graduados e Investigación

Ángel Licea-Claverie, Instituto Tecnológico de Tijuana

Centro de Graduados e Investigación

Arturo Zizumbo-López, Instituto Tecnológico de Tijuana

Centro de Graduados e Investigación

Karl-Friedrich Arndt, Dresden University of Technology

Physical Chemistry of Polymers

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Published

2017-10-12

Issue

Section

Regular Articles

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