草酸钛钙正负电流变液在电场下的宏观对比
MACROSCOPIC CONTRAST OF POSITIVE AND NEGATIVE ELECTRORHEOLOGICAL FLUIDS BASED ON CALCIUM TITANUM OXALATE
孙新淇,王晨阳,周昱萱,齐尉序,魏华
摘要(Abstract):
本文主要从草酸钛钙正负电流变液的宏观表现出发,通过设计光学成像对比实验,拍摄到了正负电流变液各自在直流电场下内部结构的变化过程。得到的观测结果直观地验证了电流变液的内部结构变化,也间接地验证了对应的流变液理论。实验观测一方面解释了正负电流变液的某些光学性质,另一方面探究了相应的正负电流变液样品的形成机理。我们也同时拍摄到了负流变液独特的树枝状结构以及形成过程,并且发现结构形状与电场方向有关,我们尝试对这些现象给出了推测和解释。
关键词(KeyWords): 正电流变液;负电流变液;草酸钛钙;链状结构;树枝状结构
基金项目(Foundation): 国家自然基金面上项目(11974067);; 重庆市自然基金项目(cstc2019jcyj-msxmX0145);; 重庆市大学生创新训练项目
作者(Author): 孙新淇,王晨阳,周昱萱,齐尉序,魏华
参考文献(References):
- [1] 陆坤权,刘寄星.软物质物理-物理学的新学科[J].物理,2009,38(7):453-461.LU K Q,LIU J X.Soft matter physics-a new field of physics[J].Physics,2009,38(7):453-461 .(in Chinese)
- [2] 巫金波,温维佳.场诱导软物质智能材料研究进展[J].物理学报,2016,65(18):112-124.WU J B,WEN W J.Research progress of field-inducedd soft smart materials[J].Acta Physica Sinica,2016,65(18):112-124.(in Chinese)
- [3] MARTINJE,ODINEKJ,HALSEY T C.Evolution of structure in a quiescent electrorheological fluid[J].Phys Rev Lett,1992,69(10):1524-1527.
- [4] CHEN T J,ZITTER R N,TAO R.Laser diffraction determination of the crystalline structure of an electrorheological fluid[J].Phys RevLett,1992,68(16):2555-2558.
- [5] 罗春荣,张兆东,赵晓鹏.电流变液与电磁流变液的衍射特性[J].光子学报,1997,26(12):1119-1122.LUO C R,ZHANG Z D,ZHAO X P.The diffraction character of ER fluid and EMR fluid[J].Acta Phot Sin,1997,26(12):1119-1122.(in Chinese)
- [6] 秦晓君,赵晓鹏.电流变液的近红外特性研究[J].红外技术,1996,18(1):34-37.QIN X J,ZHAO X P.Study on infrared characteristics of electrorheological fluid[J].Infrared Technology,1996,18(1):34-37.(in Chinese)
- [7] KO Y G,LEE H J,CHUN Y J,et al.Positive and negative electrorheological response of alginate salts dispersed suspensions under electric field[J].ACS Appl Mater Interfaces,2013,5:1122-1130.
- [8] WU J,SONG Z,LIU F,et al.Giant electrorheological fluids with ultrahighelectrorheological efficiency based on a micro/nano hybrid calcium titanyl oxalate composite[J].NGP Asia Mater,2016,8:e322.
- [9] 张国宇,魏华.微纳尺度下激光聚焦的探究[J],物理与工程,2020,30(2):98-102.ZHANG G Y,WEI H.Study on optical focusing of laser at micro-nano scale[J],Physics and Engineering,2020,30(2):98-102.(in Chinese)
- [10] OTSUBO Y,WATANABE K.Electrorheological behavior of barium titanate suspensions[J].J.Rheol,1990,18:111-116.
- [11] QUINCKE G.Ueber rotationen im constanten electrischen felde[J].Ann.Phys,1896,295:417-486.
- [12] BROSSEAU Q,HICKEY G,VLAHOVSKA P M.Electrohydrodynamic Quincke rotation of a prolate ellipsoid[J].Phys.Rev.Fluids,2017,2,014101.