期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 81, 期 2, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.81.024801
关键词
memory effect; rheology; plasticity; desiccation crack
资金
- Japan Society for the Promotion of Science (JSPS) [22340112, 21540388, 23540452]
- HAS
- DST
- Grants-in-Aid for Scientific Research [22340112, 21540388, 23540452] Funding Source: KAKEN
A densely packed colloidal suspension with plasticity, called paste, is known to remember directions of vibration and flow. These memories in paste can be visualized by the morphology of desiccation crack patterns. Here, we find that paste made of charged colloidal particles cannot remember flow direction. If we add sodium chloride into such paste to screen the Coulombic repulsive interaction between particles, the paste comes to remember flow direction. That is, one drop of salt water changes memory effect in the paste and thereby we can tune the morphology of desiccation crack patterns more precisely.
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