| Project/Area Number |
20500663
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General human life sciences
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| Research Institution | Iwate University |
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Principal Investigator |
AMAKI Keiko Iwate University, 教育学部, 准教授 (80193019)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | 洗浄 / 界面活性剤水溶液 / 流体力 / 抗力 / 粘性 / 抵抗減少効果 / 界面活性剤永溶液 |
|---|
| Research Abstract |
The effect of fluid force on detergency has been experimentally investigated. It was conducted on the flow of aqueous solutions of detergent through mesh screens to mimic cloth washing. Pressure losses across the mesh screens were measured for water, dilute polymer and several aqueous surfactant solutions. A reduction of pressure losses was observed for the flow of aqueous solutions of surfactants, but not for the dilute solutions of polymers, through mesh screens. On the other way, viscosity of solutions was measured. For all solutions used, the viscosity increase with an increase of concentration. And it decreases with an increase of temperature. So the results of viscosity are different from those of drag.
These mean that aqueous solutions of surfactants provide an effect to reduce the drag of flow through yarns or fibers and to increase the flow rate, resulting in easier removal of soil than in water, as well as the effect to lesson the chemical potential between soil and substrate.
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