Sedimentation Pattern of Polymer Colloidal Dispersions in the External Fields

聚合物胶体分散体在外场的沉降规律

• 批准号: 18350057
• 负责人: OKUBO Tsuneo
• 金额: $ 9.33万
• 依托单位: Yamagata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18350057/
• 关键词: Sedimentation dissipative pattern; Convectional dissipative pattern; Drvine dissinative pattern; Gravitational convection; Maraneoni convection; Colloidal silica spheres; PMMA spheres; 外場応答性; 電場応答性; コロイダルシリカ粒子

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.

本课题对聚合物胶体分散体干燥过程中的对流、沉降和干燥耗散模式等进行了深入研究，主要结果如下：(1)在盖玻璃、表玻璃和玻璃盘上形成了宽环状的沉积模式，说明了水和胶体球对流流动的重要作用。沉积球通过向外和/或向上的对流流动与向内和/或向下的沉积作用的平衡，改变了其漂浮在基底上的半平衡位置。(2)宏观（宽环状、辐状纹路）和微观（细多辐状、刺状、星形纹路等）干燥纹路形成。(3)研究了中国黑色墨水和聚甲基丙烯酸甲酯、PMMA微球悬浮液在高温和室温下的对流模式。在基质上首次观察到宽环、辐线（“Terada细胞”）和循环细胞结构。(4)对流耗散、沉降耗散和干燥耗散的计算模拟等理论讨论仍有待进一步研究。

项目成果

高分子

高分子

• 发表时间: 2007
• 作者: 西山伸宏;片岡一則
• 通讯作者: 片岡一則

Thermo-sensitive colloidal crystals of silica spheres in the presence of large spheres with poly (N-isopropyl acrylamide) shells

• DOI: 10.1007/s00396-006-1578-4
• 发表时间: 2006-10
• 期刊: Colloid and Polymer Science
• 影响因子: 2.4
• 作者: T. Okubo;Taro Mizutani;J. Okamoto;Keisuke Kimura;A. Tsuchida;K. Tauer;V. Khrenov;H. Kawaguchi;Sakiko Tsuji

Self-organization in colloidal suspension

胶体悬浮液中的自组织

• 发表时间: 2008
• 期刊: Handbook of Self Organization, NTS Pub (in press)
• 作者: T. Okubo;J. Okamoto and A. Tsuchrda;T. Okubo J. Okamoto and A. Tsuchida;T. Okubo;T. Okubo
• 通讯作者: T. Okubo

Drying dissipative patterns of the colloidal crystals of silica spheres in an d,c-electric field

二氧化硅球胶体晶体在直流电场中的干燥耗散模式

• 发表时间: 2007
• 期刊: Colloids Surfaces, Biomtelface B, 56, No.1-2
• 作者: T. Okubo;K. Kimura and A. Tsuchida
• 通讯作者: K. Kimura and A. Tsuchida

Color and Chemistry(Japanese)

颜色与化学（日语）

• 发表时间: 2006
• 期刊: Kobunsht 55
• 作者: T. Okubo;T. Mizutam;J. Okamoto;K. Kimura;A. Tsuchida;K. Tauer;V. Khrenov;H. Kawaguchi and S. Tsuji;A. Tsuchida and T. Okubo;T. Okubo;T. Okubo;T. Okubo;T. Okubo
• 通讯作者: T. Okubo