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Drag-reduction of a nonionic surfactant aqueous solution and its rheological characteristics

Science China(Technological Sciences) 2012年第3期55卷 772-778页

作者： CAI ShuPeng SUZUKI Hiroshi komoda yoshiyuki Institute of High Pressure Water Jet Hunan University of TechnologyZhuzhou 412007China Graduate of Science and technology Kobe UniversityKobe 657-8501Japan

In order to develop turbulent drag-reducing technology by using an environmentally friendly additive in a water-transporting system,the drag reducing characteristics in a non-ionic surfactant(Oleyldimethylamineoxide,ODMAO) dilute aqueous solution flowing in a circular pipe of 5 mm diameter have been experimentally investigated with an air-driven fluid resistance test *** rheological characteristics of the solution have also been examined by a rheometer with a cone-plate flow *** results show that the ODMAO solutions are drag-reducing when concentration is 400 ppm or higher,that the critical Reynolds number corresponding to the maximum drag reduction rate increases with both concentration and temperature,and that the maximum drag reduction rate can reach up to 70% in the straight *** low shear rates,the shear viscosity of ODMAO solutions with a relatively high drag-reduction behaves similarly to Newtonian fluids;at above a certain critical shear rate,it is firstly shear-thickening,then *** shear-rate-dependent characteristics of the shear viscosity are attributed to the different transitions of micellar network structure induced by different shear *** of shear stress after removing an applied constant shear rate at which the solution is in the SIS(shear-induced structure) state is found to be well expressed by a 2-step Maxwell model with a tail relaxation time much shorter than that for a drag-reducing cationic surfactant,which indicates that for the ODMAO solution,a viscoelasticity as strong as a drag-reducing cationic surfactant is not needed to realize turbulent drag-reduction.

关键词： nonionic surfactant drag-reduction shear viscosity shear stress relaxation

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Structure Control of Silica Particle Sols by Spin Coating

Structure Control of Silica Particle Sols by Spin Coating

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第四届中美化学工程会议和第三届中日化工研讨会合并的三边化学工程大会

作者： Hiroshi Yoshiba yoshiyuki komoda Hironobu Imakoma Hiromoto Usui Dai Nippon Printing Co. Ltd. Japan

The structure of mono-modal spherical silica particle sols was controlled by changing the rotation rate of the spin coating. The number of cluster formed in the spin coated layer was counted. The apparent viscosity of silica particle(13兪m dia.) sols was measured, and the cluster size and number of primary particles contained in the cluster were predicted by the Usui乫s suspension model, which makes assumption that multi-breakup of inter-particle bonding occurs when a cluster breaks into two parts under a simple shear flow by spin coating. It was certified that the maximum packing volume fraction for particles can be successfully used to predict the slurry viscosity, and this means indirectly the maximum packing volume fraction determined in this study may be reasonable. And Good agreement of the number of cluster between experimental data and the prediction was obtained. This means that the Usui乫s model can be used to predict the controlled structure of particles in spin coating technology.

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非离子表面活性剂在水流中的减阻机理

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实验流体力学 2011年第6期25卷 54-58,65页

作者：蔡书鹏铃木洋菰田悦之湖南工业大学水射流研究所湖南株洲412008 日本神户大学大学院工学研究科

为探讨非离子表面活性剂的减阻机理,在实验确认表面活性剂APG水溶液(Alkyl Polyglucoside)具有湍流减阻功效的基础上,对其剪切粘度、应力松弛特性以及剪切双折射效应,使用锥板流变仪及流动双折射测试仪进行了实验研究。最大减阻率可达70... 详细信息

为探讨非离子表面活性剂的减阻机理,在实验确认表面活性剂APG水溶液(Alkyl Polyglucoside)具有湍流减阻功效的基础上,对其剪切粘度、应力松弛特性以及剪切双折射效应,使用锥板流变仪及流动双折射测试仪进行了实验研究。最大减阻率可达70%的APG水溶液,其剪切粘度在低剪切速率区域表现为牛顿流体特性,在大于临界剪切速率区域表现为'SIS'(Shear-Induced Structure),呈现非牛顿流体特性;APG水溶液的剪切应力松弛特性与纯水基本相似,表明'SIS'并不具有粘弹性特性。由剪切双折射效应证实的的棒状胶束聚合结构和具有的较大拉伸粘度可认为是APG水溶液能够实现湍流减阻的主要原因。

关键词：非离子表面活性剂减阻机理剪切粘度剪切应力松弛拉伸粘度

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烷基聚糖苷水溶液的紊流减阻与流变特性

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四川大学学报（工程科学版） 2011年第6期43卷 53-57页

作者：蔡书鹏铃木洋薄井洋基菰田悦之湖南工业大学水射流研究所湖南株洲412008 日本神户大学大学院日本神户657-8501

为开发基于环境友好型表面活性剂的紊流输水减阻技术,使用压送流体阻力测试装置和锥板流变仪,对非离子表面活性剂烷基聚糖苷水溶液的减阻、剪切粘度和应力松弛特性进行了实验研究。结果表明:烷基聚糖苷是一种出色的减阻剂,临界雷诺数随... 详细信息

为开发基于环境友好型表面活性剂的紊流输水减阻技术,使用压送流体阻力测试装置和锥板流变仪,对非离子表面活性剂烷基聚糖苷水溶液的减阻、剪切粘度和应力松弛特性进行了实验研究。结果表明:烷基聚糖苷是一种出色的减阻剂,临界雷诺数随温度和浓度增加而提高;剪切粘度在低剪切速率区域不随剪切速率而改变,在较高剪切速率区域,呈现非牛顿特性,烷基聚糖苷水溶液表现为"SIS"(Shear-Induced Structure),但瞬间的剪切应变加载和卸载后,剪切应力的发展和松弛特性与纯水相同,未表现出任何粘弹特性,表明"SIS"与粘弹特性的出现与否没有直接的因果关系。

关键词：烷基聚糖苷压力损失阻力特性减阻剪切粘度剪切应力松弛

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Primary Malignant Lymphoma of Prostate with Silent <i>MYD</i>88 Mutation

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Case Reports in Clinical Medicine 2014年第3期3卷 125-128页

作者： Keisuke Yoshida Riko Kitazawa Munenori komoda Chihiro Ito Ryuma Haraguchi Sohei Kitazawa Department of Molecular Pathology Ehime University Graduate School of Medicine Toon City Japan

We present a case of primary malignant lymphoma of the prostate in a 77-year-old Japanese man. Immunohistochemical examinations revealed the presence of a non-GCB subtype of DLBCL (CD10 (-), Bcl-6 (-), MUM1 (+)), and genetic analysis disclosed a lack of typical codon 206 or 265 missense mutation in MYD88, suggesting that the case was of type3 (non-GCB andnon-ABC), a subtype of DLBCL. Three courses of chemotherapy (rituximab in combination with cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP)) were effective, and the patient has been free of the disease with no local or systemic recurrence for three years. Although the significance of silent mutation at hot spot of the highly oncogenic MYD88 gene in this case is unclear, a minute increase in translational efficiency by silent mutation may have contributed to the activation of MYD88.

关键词： Malignant Lymphoma Prostate MYD88

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