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  • SHEN, RONG  (9)
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  • 1
    Online Resource
    Online Resource
    THE METHODS FOR MEASURING SHEAR STRESS OF POLAR MOLECULE DOMINATED ER FLUIDS
    World Scientific Pub Co Pte Ltd ; 2007
    In:  International Journal of Modern Physics B Vol. 21, No. 28n29 ( 2007-11-10), p. 4813-4818
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 21, No. 28n29 ( 2007-11-10), p. 4813-4818
    Abstract: A series of ER fluids materials with high shear stress have been developed recently, which named as polar molecule dominated electrorheological (PM-ER) fluids. Difficulties have been met in shear stress measurement process due to the slide of PM-ER fluids on the surface of metallic electrodes. In this paper, two shearing configurations have been developed to remove the interface effect. The intrinsic shear stress of ER fluids can be obtained by using the devices.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979207045700
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2007
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  • 2
    Online Resource
    Online Resource
    TIO 2 BASED ELECTRORHEOLOGICAL FLUID WITH HIGH YIELD STRESS
    World Scientific Pub Co Pte Ltd ; 2005
    In:  International Journal of Modern Physics B Vol. 19, No. 07n09 ( 2005-04-10), p. 1104-1109
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 19, No. 07n09 ( 2005-04-10), p. 1104-1109
    Abstract: We have fabricated several TiO 2 based ER fluids with doping and without designed doping, which exhibit the high yield stress up to more than 100kPa. The titanium oxide nanoparticles were synthesized by using wet chemical method. The ER effect of those materials is dominated by the special additives, such as amide or its ramification, as well as the remained molecules or ions in the sample preparation. It is found that the yield stress is also strongly dependent on the viscosity of the oil. The prepared ER fluids possess other attractive characters, for instance the current density is low and against sedimentation.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979205029924
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2005
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    Online Resource
  • 3
    Online Resource
    Online Resource
    POLAR MOLECULE TYPE ELECTRORHEOLOGICAL FLUIDS
    World Scientific Pub Co Pte Ltd ; 2007
    In:  International Journal of Modern Physics B Vol. 21, No. 28n29 ( 2007-11-10), p. 4798-4805
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 21, No. 28n29 ( 2007-11-10), p. 4798-4805
    Abstract: The static and dynamic shear stress of newly developed electrorheological (ER) fluids can reach more than 100 kPa and over 60 kPa at 3 kV/mm, respectively. The high yield stress of those ER fluids and its near linear dependence on the electric field are different from the conventional ER fluids and can not be explained with traditional dielectric theory. Experiment demonstrates that the polar molecules adsorbed on the particles play crucial role in those ER fluids, which can be named as polar molecule type electrorheological (PM-ER) fluids. To explain PM-ER effect a model is proposed based on the interaction of polar molecule-charge in between the particles, where the local electric field is much higher than the external one and can cause the polar molecules aligning. The main effective factors for achieving high-performance PM-ER fluids are discussed.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979207045682
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2007
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    Online Resource
  • 4
    Online Resource
    Online Resource
    LANTHANUM TITANATE NANOPARTICLES ER FLUIDS WITH HIGH PERFORMANCE
    World Scientific Pub Co Pte Ltd ; 2012
    In:  Modern Physics Letters B Vol. 26, No. 13 ( 2012-05-30), p. 1250079-
    Details
    In: Modern Physics Letters B, World Scientific Pub Co Pte Ltd, Vol. 26, No. 13 ( 2012-05-30), p. 1250079-
    Abstract: A new type of electrorheological (ER) fluid consisting of lanthanum titanate (LTO) nanoparticles is developed. The ER fluids were prepared by suspending LTO powder in silicone oil and the particles were fabricated by wet chemical method. This ER fluid shows excellent ER properties: The static yield stress reaches over 150 kPa under 5 kV/mm with linear dependence on the applied DC electric field, and the current density is below 10 μA/cm 2 . In order to investigate the affect factor on the ER behavior, the LTO powder were heated under different temperatures. The ER performances of two particles treated under different temperatures were compared and the composition changes for those particles were analyzed with TG-FTIR technique. It was found that the static yield stress of the suspensions fell from over 150 kPa to about 40 kPa and the current densities decreased prominently as the rise of the heating temperature. TG-FTIR analysis indicated that polar groups remained in the particles such as alkyl group, hydroxyl group and carbonyl group etc., contribute to the ER effect significantly. The experimental results are helpful to understand the mechanism of the high ER effect and to synthesize better ER materials.
    Type of Medium: Online Resource
    ISSN: 0217-9849 , 1793-6640
    URL: Article
    DOI: 10.1142/S0217984912500790
    RVK:
    UA 5534.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2012
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  • 5
    Online Resource
    Online Resource
    POLAR-MOLECULE-DOMINATED ELECTRORHEOLOGICAL (PM-ER) FLUIDS: THE PROPERTIES AND EVALUATIONS
    World Scientific Pub Co Pte Ltd ; 2011
    In:  International Journal of Modern Physics B Vol. 25, No. 07 ( 2011-03-20), p. 957-962
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 25, No. 07 ( 2011-03-20), p. 957-962
    Abstract: In recent years, a new type ER fluids named as polar-molecule-dominated electrorheological (PM-ER) fluids have been developed, of which the yield stress can reach more than 100 kPa and behaves a linear dependence on the electric field. A brief description on the composition and synthesizing method for the materials is given. The main merits of PM-ER fluid are as follows: high yield stress, the shear stress increasing with shear rate up to more than 10 3 s -1 , low current density, rapid electric response and anti-sedimentation. Some perspectives on PM-ER fluid and its applications are presented.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S021797921105850X
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2011
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    Online Resource
  • 6
    Online Resource
    Online Resource
    THE ELECTRORHEOLOGICAL FLUIDS WITH HIGH SHEAR STRESS
    World Scientific Pub Co Pte Ltd ; 2005
    In:  International Journal of Modern Physics B Vol. 19, No. 07n09 ( 2005-04-10), p. 1065-1070
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 19, No. 07n09 ( 2005-04-10), p. 1065-1070
    Abstract: A series of high performance ER fluids newly manufactured in our laboratory are presented. The yield stress of those ER fluids can reach several tens of kPa, 100 kPa and even 200 kPa, respectively. For understanding the high shear stress effect a model is proposed base on the electric field induced molecular bounding effect. The main effective factors in fabricating the high performance ER are discussed.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979205029869
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2005
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  • 7
    Online Resource
    Online Resource
    HIGH PERFORMANCE CALCIUM TITANATE NANOPARTICLE ER FLUIDS
    World Scientific Pub Co Pte Ltd ; 2005
    In:  International Journal of Modern Physics B Vol. 19, No. 07n09 ( 2005-04-10), p. 1110-1113
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 19, No. 07n09 ( 2005-04-10), p. 1110-1113
    Abstract: A type of calcium titanate (CTO) nanoparticles was synthesized by means of wet chemical method [1] without coating on the particles. The CTO/silicone oil ER fluid exhibits excellent electrorheological properties: high shear stress (~50-100 kPa ) under dc electric field, a low current density (less than 2μA/cm2 at 5kV/mm), and long term stability against sedimentation. Although there are not special additives in the ER fluids, it is found from the chemical analysis that a trace of alkyl group, hydroxyl group, carbonyl group and some ions is remained in the particles which may dominate the ER response.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979205029936
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2005
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    Online Resource
  • 8
    Online Resource
    Online Resource
    ELECTRIC FIELD-INDUCED INTERACTION FORCE BETWEEN TWO SPHERES
    World Scientific Pub Co Pte Ltd ; 2005
    In:  International Journal of Modern Physics B Vol. 19, No. 07n09 ( 2005-04-10), p. 1209-1214
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 19, No. 07n09 ( 2005-04-10), p. 1209-1214
    Abstract: An apparatus is developed to study field-induced forces between two spheres. The mutual forces of a couple of identical spheres made of different materials in various media have been measured precisely as the function of inter-spherical spacing, field strength and field frequency. The respective dependences of the forces on inter-spherical spacing, field strength, field frequency and sphere size are obtained. By comparing the measured results with available theoretical calculations we conclude that a further improvement on the theoretical model should be carried out for explaining the most experimental results when the particle nearly contact.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979205030086
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2005
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    Online Resource
  • 9
    Online Resource
    Online Resource
    THE MODIFIED ELECTRODES FOR THE APPLICATION OF POLAR MOLECULE DOMINATED ELECTRORHEOLOGICAL (PM-ER) FLUIDS
    World Scientific Pub Co Pte Ltd ; 2007
    In:  International Journal of Modern Physics B Vol. 21, No. 28n29 ( 2007-11-10), p. 4940-4944
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 21, No. 28n29 ( 2007-11-10), p. 4940-4944
    Abstract: For polar molecule dominated electrorheological (PM-ER) fluids [1], the surfaces of ordinary metallic electrodes cannot satisfy the condition of polar molecules' aligning and interaction. Slide must occur at the interface between PM-ER fluids and electrodes so that the measured shear stress is much lower than the true value. Several modified electrodes are developed and tested for increasing the adhesion of PM-ER fluids to the electrodes and weakening the slide in shearing. The modified electrodes can not only improve the measured shear stress to approach the intrinsic one, but also greatly reduce the current density of PM-ER fluids. Using the modified electrodes is certainly necessary for measuring and applying the PM-ER fluids.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979207045864
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2007
    Location Call Number Limitation Availability
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