Dehydration and vitrification of corneal gel

Annaka Masahiko, Toyoaki Matsuura, Shinji Maruoka, Nahoko Ogata

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

Temporal changes in the weight and elastic properties during the dehydration of pig corneal gel were investigated. The moisture from the corneal gel evaporated in two stages. At the crossover point between these two stages, the elastic modulus of the corneal gel showed an anomaly: the loss tangent (tan δ) showed an anomalous peak with the jump of the dynamic elastic modulus, E′. Two fractions of water exist in the corneal gel: one strongly bound to the relaxation centers, and the other almost freely diffusible as liquid bulk water. A quantitative analysis shows that the bound fraction of the corneal water under physiological hydration makes up about 3% of the total water. The abrupt increase in non-freezing water content, and the distinct change in the bound water fraction η of the cornea were also observed near the crossover point of weight reduction. From these observations, water exerts a plasticizing effect on the corneal gel, thereby reducing the elastic stiffness below that of the dry cornea. The absolute value of the elastic stiffness of the corneal gel is smaller than that for non-crystalline polymeric glasses by about a few orders of magnitude. It is plausible to explain that the monolayer coverage of bound water on the lattice of the cornea prevents direct contact of the polymer chains of the corneal gel.

元の言語英語
ページ(範囲)8157-8163
ページ数7
ジャーナルSoft Matter
8
発行部数31
DOI
出版物ステータス出版済み - 8 21 2012

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vitrification
Vitrification
Dehydration
dehydration
Gels
gels
Water
cornea
water
stiffness
modulus of elasticity
crossovers
Polymeric glass
Elastic moduli
Stiffness
weight reduction
swine
tangents
moisture
Hydration

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

これを引用

Masahiko, A., Matsuura, T., Maruoka, S., & Ogata, N. (2012). Dehydration and vitrification of corneal gel. Soft Matter, 8(31), 8157-8163. https://doi.org/10.1039/c2sm25370d

Dehydration and vitrification of corneal gel. / Masahiko, Annaka; Matsuura, Toyoaki; Maruoka, Shinji; Ogata, Nahoko.

:: Soft Matter, 巻 8, 番号 31, 21.08.2012, p. 8157-8163.

研究成果: ジャーナルへの寄稿記事

Masahiko, A, Matsuura, T, Maruoka, S & Ogata, N 2012, 'Dehydration and vitrification of corneal gel', Soft Matter, 巻. 8, 番号 31, pp. 8157-8163. https://doi.org/10.1039/c2sm25370d
Masahiko, Annaka ; Matsuura, Toyoaki ; Maruoka, Shinji ; Ogata, Nahoko. / Dehydration and vitrification of corneal gel. :: Soft Matter. 2012 ; 巻 8, 番号 31. pp. 8157-8163.
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