ELECTRORHEOLOGICAL BEHAVIOR OF SUSPENSIONS BASED ON POLYDIMETHYLSILOXANE FILLED WITH HALLOYSITE
Abstract
The rheological behavior at 20 °С of electrorheological fluids based on silicone oil filled with halloysite nanotubes with different water content was studied. Flow and viscosity curves, storage and loss moduli were measured using a cylinder-cylinder rotary viscometer. The frequency dependences of electrical conductivity and dielectric loss tangent were obtained by dielectric spectroscopy. When an electric field is applied to the samples, their rheological behavior changes - the values of the yield stress increase. In this case, the viscosity curves exhibit an elastic behavior at low shear stresses and exhibit a Newtonian flow when the yield point is overcome. The frequency dependences of the storage and loss moduli confirm the results obtained on the flow curves. The electric field intensity influence on the magnitude of the electrorheological effect was also investigated. The effect of water presence on electrorheological and electrophysical properties was shown. Electrorheological fluid with a small amount of water exhibits a better response to the electric field application, as evidenced by higher values of the yield stresses in comparison with the sample containing drained filler. The small water content does not have a strong effect on the electrical conductivity of the systems under study, but its presence significantly changes the form of the dielectric loss tangent - the contribution of the electrical conductivity to the relaxation processes is significant, and the nature of the relaxation transitions changes due to the different polarizabilities of the wet and dried filler. This work demonstrates the prospects of using nanoscaled fillers with a high aspect ratio as the dispersed phase for electrorheological fluids.
Forcitation:
Kuznetsov N.M., Belousov S.I., Bessonova N.P., Chvalun S.N. Electrorheological behavior of suspensions based on polydimethylsiloxane filled with halloysite. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 6. P. 41-47
References
Kirsanov E.A., Matveenko V.N. Non-Newtonian flow of disperse, polymer and liquid crystal systems. Structural approach. M.: Tekhnosfera. 2016. 384 p. (in Russian).
Kwon S.H., Piao S.H., Choi H.J. Electric Field-Responsive Mesoporous Suspensions: A Review. Nanomaterials. 2015. V. 5. P. 2249-2267. DOI: 10.3390/nano5042249.
Winslow W.M. US Patent N 2417 850. 1947.
Yanovskii Yu.G., Zgaevskii V.E., Karnet Yu.N., Obraztsov I.F. Electrorheological fluids. Theoretical and experimental ap-proaches to their description. Fizich. Mesomekhanika. 2003. V. 6. N 6. P. 61-69 (in Russian).
Metayer C, Sterligov V.A., Meunier A., Bossis G., Persello J., Svechnikov S.V. Field induced structures and phase separation in electrorheological and magnetorheological colloidal suspensions. J. Phys.: Condens. Matter. 2004. V. 16. P. 3975–3986. DOI: 10.1088/0953-8984/16/38/015.
Akhavan J. Electro-rheological polymers. Proc. IMechE Part G: J. Aerospace Eng. 2007. V. 221. P. 577-587.
DOI: 10.1243/09544100JAERO142.
Zhang X., Xu L., Wang Q. Electro-rheological properties of montmorillonite particles coated with titania in methyl silicone oil. J. China Univ. Mining & Technol. 2008. V. 18. P. 0427–0431. DOI: 10.1016/S1006-1266(08)60088-7.
Korobko E.V., Dostanko A.P., Korobko A.O, Roiyzman V.P., Novikova Z.A., Zhuravskiy N.A., Globa A.I. Electrostruc-turing dispersions of nanosize fillers for fabrication of adaptive composites. Nanosistemy, Nanomaterialy, Nanotekhnologii. 2011. V. 9. N 3. P. 569-581 (in Russian).
Zhang W.L., Choi H.J. Fabrication of semiconducting polyaniline-wrapped halloysite nanotube composite and its electrorheolo-gy. Colloid Polym. Sci. 2012. V. 290. P. 1743–1748. DOI: 10.1007/s00396-012-2719-6.
Wu J., Liu F., Guo J., Cui P., Xu G., Cheng Y. Preparation and electrorheological characteristics of uniform core/shell structural particles with different polar molecules shells. Colloids and Surfaces A: Physicochem. Eng. Aspects. 2012. V. 410. P. 136–143. DOI: 10.1016/j.colsurfa.2012.06.033.
Davydova O.I., Kraev A.S., Redozubov A.A., Trusova T.A., Agafonov A.V. Effect of Polydimethylsiloxane Viscosity on the Electrorheological Activity of Dispersions Based on It. Rus. J. Phys. Chem. A. 2016. V. 90. N 6. P. 1269–1273. DOI: 10.1134/S0036024416060054.
Wen W., Huang X., Yang S., Lu K., Sheng P. The giant electrorheological effect in suspensions of nano-particles. Nature Ma-terials. 2003. V. 2. P. 727–730. DOI: 10.1038/nmat993.
Huang X., Wen W., Yang S., Sheng P. Mechanisms of the giant electrorheological effect. Solid State Communications. 2006. V. 139. P. 581–588. DOI: 10.1016/j.ssc.2006.04.042.
Wen W., Huang X., Sheng P. Electrorheological fluids: structures and mechanisms. Soft Matter. 2008. V. 4. P. 200–210.
DOI: 10.1039/b710948m.
Sheng P., Wen W. Electrorheological Fluids: Mechanisms, Dynamics, and Microfluidics Applications. Annu. Rev. Fluid Mech. 2012. V. 44. P. 143–174. DOI: 10.1146/annurev-fluid-120710-101024.
Belijar G., Valdez-Nava Z., Diaham S., Laudebat L., Jones T.B., Lebey T. Dynamics of particle chain formation in a liquid polymer under ac electric field: modeling and experiments. J. Phys. D: Appl. Phys. 2017. V. 50. P. 025303-025311. DOI: 10.1088/1361-6463/50/2/025303.
Shen C., Wen W., Yang S., Sheng P. Wetting-induced electrorheological effect. J. Appl. Phys. 2006. V. 99. P. 106104. DOI: 10.1063/1.2199749.
Espin M.J., Delgado A.V., Plocharski J.Z. Effect of additives and measurement procedure on the electrorheology of hema-tite/silicone oil suspensions. Rheol Acta. 2006. V. 45. P. 865–876. DOI: 10.1007/s00397-005-0069-8.
Yin J., Zhao X. Titanate nano-whisker electrorheological fluid with high suspended stability and ER activity. Nanotechnology. 2006. V. 17. P. 192–196. DOI: 10.1088/0957-4484/17/1/031.
Lee S., Yoon C.-M., Hong J.-Y., Jang J. Enhanced electrorheological performance of a graphene oxide-wrapped silica rod with a high aspect ratio. J. Mater. Chem. C. 2014. V. 2. P. 6010 - 6016. DOI: 10.1039/c4tc00635f.
Rozhina E.V., Danilushkina A.A., Naumenko E.A., Lvov Yu.M., Fakhrullin R.F. Halloysite nanotubes is a promising bio-compatible material for «smart» composites with encapsulation of biologically active substances. Geny i Kletki. 2014. V. IX. N 3. P. 25-28 (in Russian).
Joussein E., Petit S., Churchman J., Theng B., Righi D., Delvaux B. Halloysite clay minerals - a review. Clay Minerals. 2005. V. 40. P. 383 – 426. DOI: 10.1180/0009855054040180.