著者

Yuzuru Uehara Eita Shimoda Yuichi Iitaka Yuko Nishimoto

出版者

一般社団法人 日本MRS

雑誌

Transactions of the Materials Research Society of Japan (ISSN:13823469)

巻号頁・発行日

vol.38, no.4, pp.589-592, 2013-12-01 (Released:2014-02-18)

参考文献数

10

被引用文献数

1 2

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Methyl cellulose (MC) and Polyethylene Glycol (PEG) were considered to be environmentally and biologically friendly materials, and have been applied to industrial or biological use as a highly hydrophilic and viscous polymer. PEG-water systems in various molar ratios of ethylene oxide (constitutional repeating unit of PEG) to H2O were investigated by DSC, NIR (Near infrared spectroscopy) and 17O NMR, in order to investigate the behavior of water molecules in PEG hydrogel. The melting behavior of eutectic of PEG and water by DSC shows good agreement with those of NIR, NMR measurements. Alkali chloride aqueous solution forms a eutectic at low temperature. In this study, we focused on the MC -PEG- water system and MC-alkali chloride- water system at the water-rich region. The water state or the dynamic mechanical property was investigated. The PEG-MC-water system and MC-alkali chloride-water system form thermo reversible gel in the heating process. We found that the memory of the gel state was kept for 3 days after gelation at room temperature. The period of keeping the memory of the gel state after gelation agreed with the strength of PEG or Alkali chloride -water interaction. It was found that the interaction was detectable by DSC.