Sedimentation Pattern of Polymer Colloidal Dispersions in the External Fields View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2006-2007

FUNDING AMOUNT

14580000 JPY

ABSTRACT

In this project, the convectional, sedimentation and drying dissipative patterns during the course of drying polymer colloidal dispersions and others were studied intensively Main results obtained are summarized as following:(1) The broad ring-like sedimentation patterns were formed on a cover glass, a watch glass and a glass dish, which demonstrates the important role of the convectional flow of water and colloidal spheres. The sedimentary spheres changed their semi-equilibrium position floating over the substrates by the balancing between the outside and/or upward convectional flow and inner ward and/or downward sedimentation.(2) Macroscopic (broad rings and spoke-like lines) and microscopic (fine multiple spoke lines, sting-like, star-like patterns, etc) drying patterns formed.(3) Convectional patterns of Chinese black ink and aqueous suspensions of poly (methyl methacrylate), PMMA spheres have been studied in detail at the elevated and the room temperatures, respectively. Broad ring, spoke line ("Terada cells") and the circulating cell structures were observed, for the first time, on the substrates.(4) Patterns in a flow field and theoretical discussion including computational simulation on the convectional, sedimentation and drying dissipative patterns are still open for further study. More... »

URL

https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18350057

Related SciGraph Publications

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  • 2010-01. Convectional, sedimentary, and drying dissipative patterns of colloidal suspensions of polymer complexes of poly(acrylic acid) with poly(ethylene glycol) and poly(vinyl pyrrolidone) in COLLOID AND POLYMER SCIENCE
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  • 2009-04. Drying dissipative patterns of aqueous solutions of simple electrolytes and their binary mixtures on a cover glass in COLLOID AND POLYMER SCIENCE
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  • 2008-10. Convectional, sedimentation, and drying dissipative patterns of colloidal silica (183 nm in diameter) suspensions in a glass dish and a watch glass in COLLOID AND POLYMER SCIENCE
  • 2008-09. Convectional, sedimentation and drying dissipative patterns of colloidal crystals of poly(methyl methacrylate) spheres on a watch glass in COLLOID AND POLYMER SCIENCE
  • 2008-09. Convectional, sedimentation, and drying dissipative patterns of colloidal crystals of poly (methyl methacrylate) spheres on a cover glass in COLLOID AND POLYMER SCIENCE
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  • 2008-06. Drying dissipative patterns of colloidal crystals of silica spheres on a cover glass at the regulated temperature and humidity in COLLOID AND POLYMER SCIENCE
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  • 2006-12. Thermo-sensitive colloidal crystals of silica spheres in the presence of large spheres with poly (N-isopropyl acrylamide) shells in COLLOID AND POLYMER SCIENCE
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