Anomalous velocity change of surface wave near the gelation point

Hirotaka Okabe, Keiichi Kuboyama, Kazuhiro Hara, Shoichi Kai

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

We studied the properties of surface waves during the gelation process of tungstic acid and gelatin and silica gel by the time resolved surface wave measurements. The anomaly is clearly shown in the change of the wave number exponent x (ω to approximately kx, the values 1.5 and 1.0 indicate surface tension and elastic wave, respectively). x of the tungstic acid was about 1.4 in the sol state and rapidly decreased to 1.0 at the gelation point. x of gelatin was about 1.4 (same as tungstic acid) in the sol state and decreased gradually after the gelation point. On the other hand, x of silica gel remained near 1.5 after the gelation point.

Original languageEnglish
Pages (from-to)73-76
Number of pages4
JournalPhysica B: Condensed Matter
Volume263-264
DOIs
Publication statusPublished - Jan 1 1999
EventProceedings of the 1998 9th International Conference on Phonon Scattering in Condensed Matter, PHONONS 98 - Lancaster, Great Britain
Duration: Jul 26 1998Jul 31 1998

Fingerprint

gelation
Gelation
Surface waves
surface waves
Silica Gel
gelatins
Silica gel
silica gel
Polymethyl Methacrylate
Gelatin
Sols
acids
Acids
Elastic waves
elastic waves
Surface tension
interfacial tension
exponents
anomalies
tungstic(VI) acid

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Anomalous velocity change of surface wave near the gelation point. / Okabe, Hirotaka; Kuboyama, Keiichi; Hara, Kazuhiro; Kai, Shoichi.

In: Physica B: Condensed Matter, Vol. 263-264, 01.01.1999, p. 73-76.

Research output: Contribution to journalConference article

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AU - Okabe, Hirotaka

AU - Kuboyama, Keiichi

AU - Hara, Kazuhiro

AU - Kai, Shoichi

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N2 - We studied the properties of surface waves during the gelation process of tungstic acid and gelatin and silica gel by the time resolved surface wave measurements. The anomaly is clearly shown in the change of the wave number exponent x (ω to approximately kx, the values 1.5 and 1.0 indicate surface tension and elastic wave, respectively). x of the tungstic acid was about 1.4 in the sol state and rapidly decreased to 1.0 at the gelation point. x of gelatin was about 1.4 (same as tungstic acid) in the sol state and decreased gradually after the gelation point. On the other hand, x of silica gel remained near 1.5 after the gelation point.

AB - We studied the properties of surface waves during the gelation process of tungstic acid and gelatin and silica gel by the time resolved surface wave measurements. The anomaly is clearly shown in the change of the wave number exponent x (ω to approximately kx, the values 1.5 and 1.0 indicate surface tension and elastic wave, respectively). x of the tungstic acid was about 1.4 in the sol state and rapidly decreased to 1.0 at the gelation point. x of gelatin was about 1.4 (same as tungstic acid) in the sol state and decreased gradually after the gelation point. On the other hand, x of silica gel remained near 1.5 after the gelation point.

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