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Effects of molecular mass of polymer on mechanical properties of clay/poly (ethylene oxide) blend hydrogels, and comparison between them and clay/sodium polyacrylate blend hydrogels

  • H. TakenoEmail author
  • A. Nakamura
Original Contribution
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Abstract

In this study, we examined mechanical properties of clay/polyethylene oxide (PEO) hydrogels as functions of the molecular mass of PEO and the composition. The hydrogels using ultra-high molecular mass PEOs higher than a few millions possessed very high extension (1000~2000%) and higher fracture stress in comparison with the gels using lower molecular mass PEOs. The mechanical strength was significantly affected by the composition, e.g., the moduli increased with increasing clay concentrations, whereas they decreased with the increase of the PEO concentration. The tensile properties between the clay/PEO gel and the clay/sodium polyacrylate (PAAS) gel with almost the same molecular masses were compared, so that their moduli had almost the same values, whereas the tensile strength for the former was much lower than that for the latter. Synchrotron small-angle X-ray scattering and quartz crystal microbalance analyses have revealed that the tensile behavior is attributed to weaker interactions between clay and PEO in comparison with those between clay and PAAS.

Graphical abstract

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Keywords

Mechanical performance Composite hydrogel Clay Poly (ethylene oxide) Small-angle X-ray scattering 
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Notes

Acknowledgments

The synchrotron SAXS measurements were conducted under the approval of Photon Factory Program Advisory Committee.

Funding information

This work was supported by JSPS KAKENHI Grant Number JP15K05242.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

396_2019_4476_MOESM1_ESM.doc (428 kb)
ESM 1 (DOC 428 kb)

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© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Division of Molecular Science, Graduate School of Science and TechnologyGunma UniversityKiryuJapan
  2. 2.Gunma University Center for Food Science and WellnessMaebashiJapan

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