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

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 stre...

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Bibliographic Details
Published inColloid and polymer science Vol. 297; no. 4; pp. 641 - 649
Main Authors Takeno, H., Nakamura, A.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2019
Springer Nature B.V
Subjects
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Clay
Complex Fluids and Microfluidics
Composition
Ethylene oxide
Food Science
Gels
Hydrogels
Mechanical properties
Microbalances
Nanotechnology and Microengineering
Original Contribution
Physical Chemistry
Polyethylenes
Polymer Sciences
Quartz crystals
Small angle X ray scattering
Soft and Granular Matter
Tensile properties
Composite hydrogel
Clay
Poly (ethylene oxide)
Mechanical performance
Small-angle X-ray scattering
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Summary: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.
ISSN:0303-402X
1435-1536
DOI:10.1007/s00396-019-04476-8