Measurement of mechanical properties of liquid lubricants confined in nano gaps

纳米间隙内液体润滑剂机械性能的测量

• 批准号: 21760111
• 负责人: ITOH Shintaro
• 金额: $ 2.91万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21760111/
• 关键词: トライボロジー; レオロジー

Liquids confined in nanometer-sized gap width have characteristic viscoelastic properties. In our previous study, we have developed highly-sensitive shear force measuring method, which we called the "fiber wobbling method (FWM)", and revealed that liquid polymers exhibit enhanced viscoelasticity when they are sheared. Although mechanisms to explain these phenomena must involve molecular orientation confined in the gap, details are not clarified. In this study, we succeeded in simultaneously measuring viscoelasticity and molecular orientation of confined liquid crystal using FWM combined with birefringence measurement. Our experimental results showed that the relationship between nanometer-sized gap widths and viscoelasticity strongly depends on the molecular orientation.

被限制在纳米级间隙宽度的液体具有典型的粘弹性。在我们之前的研究中，我们开发了一种高灵敏度的剪切力测量方法，我们称之为“纤维摆动法（FWM）”，并揭示了液体聚合物在剪切时表现出增强的粘弹性。虽然解释这些现象的机制必须涉及限制在间隙中的分子取向，但细节尚不清楚。在这项研究中，我们成功地利用FWM结合双折射测量同时测量了受限液晶的粘弹性和分子取向。我们的实验结果表明，纳米尺寸的间隙宽度和粘弹性之间的关系强烈依赖于分子取向。

项目成果

Shear-Thinning Behavior of Confined Lubricants Measured by Fiber Wobbling Method

纤维摆动法测量受限润滑剂的剪切稀化行为

• 发表时间: 2009
• 作者: Shintaro Itoh;Kenji Fukuzawa;Yuya Hamamoto;Hedong Zhang
• 通讯作者: Hedong Zhang

Temperature Dependence of the Viscoelastic Properties of a Confined Liquid Polymer Measured by Using an Oscillating Optical Fiber Probe

使用振荡光纤探头测量受限液体聚合物粘弹性的温度依赖性

• 发表时间: 2010
• 期刊: Japanese Journal of Applied Physics 49
• 作者: S.Itoh;K.Fukuzawa;Y.Hamamoto;H.Zhang
• 通讯作者: H.Zhang

単分子液体潤滑膜のタッチダウン・テイクオフ過程における粘弾性特性計測

单分子液体润滑膜着陆和起飞过程中粘弹性的测量

• 发表时间: 2010
• 作者: 浜本裕也;伊藤伸太郎;福澤健二;張賀東
• 通讯作者: 張賀東

Opposing effects of confinement and confinement-induced shear-thinning on viscoelastic properties of liquid lubricant in nanometer-scale gaps

限制和限制引起的剪切稀化对纳米级间隙中液体润滑剂粘弹性的相反影响

• 发表时间: 2011
• 期刊: Tribology International in press
• 作者: S.Itoh;K.Fukuzawa;Y.Hamamoto;H.Zhang
• 通讯作者: H.Zhang

Shear thinning behavior of monolayer liquid lubricant films measured by fiber wobbling method

纤维摆动法测量单层液体润滑膜的剪切稀化行为

• 发表时间: 2010
• 期刊: Journal of Physics : Conference Series 258,012010
• 作者: Y.Hamamoto;S.Itoh;K.Fukuzawa;H.Zhang
• 通讯作者: H.Zhang