Abstract
We have found in this study, by means of steady and dynamic rheometry, that Aerosil® R816 particles, in which hydroxyl groups have been mostly substituted by alkyls groups, form nonflocculated suspensions in polypropylene glycol, in comparison to what was expected from previous studies. Steady flow curve shows shear-thickening behavior between two shear-thinning regions. The transient rheological response has been analyzed using a protocol proposed a long time ago by Cheng (Rheol Acta 25:542–554, 1986). It has been found that, within the reversible shear-thickening region, all the constant structure curves overlap, which suggests that the response at a certain shear rate does not depend significantly on the previous state. As a consequence, this protocol is proposed as an alternative technique for distinction between flocculated and nonflocculated suspensions.
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References
Barnes HA (1989) Shear thickening (“dilatancy”) in suspensions of nonaggregating solid particles dispersed in Newtonian liquids. J Rheol 33(2):329–366
Bender J, Wagner NJ (1995) Optical measurement of the contributions of colloidal forces to the rheology of concentrated suspensions. J Colloid Interface Sci 172:171–184
Bender J, Wagner NJ (1996) Reversible shear thickening in monodisperse and bidisperse colloidal suspensions. J Rheol 40(5):899–916
Boersma WH, Laven J, Stein HN (1992) Viscoelastic properties of concentrated shear-thickening dispersions. J Colloid Interface Sci 149:10–22
Bossis G, Brady JF (1989) The rheology of Brownian suspensions. J Chem Phys 91(3):1866–1874
Cheng CDH (1986) Yield stress: a time dependent property and how to measure it. Rheol Acta 25:542–554
Decker MJ, Halbach CJ, Nam CH, Wagner NJ, Wetzel E (2007) Comp Sci Technol 67:565–578
Degussa AG (1989) Fine particles. Technical Bulletin no. 18
Degussa AG (2005) Product information
Degussa AG (2006) Fine particles. Technical Bulletin no. 11
D’Haene P, Mewis J, Fuller GG (1993) Scattering dichroism measurements of flow-induced structure of a shear thickening suspension. J Colloid Interface Sci 156:350–358
Dullaert K (2005) Constitutive equations for thixotropic dispersions. PhD thesis, Katholieke Universiteit Leuven
Eisenlauer J, Killmann E (1980) Stability of colloidal silica (aerosil) hydrosols. I. Preparation and characterization of silica (aerosil) hydrosol. J Colloid Interface Sci 74(1):108–119
Fischer C, Braun SA, Bourban SE, Michaud V, Plummer CJG, Manson JAE (2006) Dynamic properties of sandwich structures with integrated shear-thickenig fluids. Smart Mater Struct 15:1467–1475
Fischer C, Plummer CJG, Michaud V, Bourban PE, Manson JAE (2007) Pre- and post-transition behavior of shear-thickening fluids in oscillating shear. Rheol Acta 46:1099–1108
Galindo-Rosales FJ, Rubio-Hernández FJ, Velázquez-Navarro JF, Gómez-Merino AI (2007) Structural level of silica-fumed aqueous suspensions. J Am Ceram Soc 90(5):1641–1643
Hoffman RL (1974) Discontinuous and dilatant viscosity behavior in concentrated suspensions. II. Theory and experimental tests. J Colloid Interface Sci 46(3):491–506
Hoffman RL (1998) Explanations for the cause of shear thickening in concentrated colloidal suspensions. J Rheol 42(1):111–123
Jaúregi-Beloqui B, Fernández-García JC, Orgilés-Barceló AC, Mahiques-Bujanda MM, Martín-Martínez JM (1999) Rheological properties of thermoplastic polyurethane adhesive solutions containing fumed silicas of different surface areas. Int J Adhes Adhes 19:321–328
Khan SA, Baker GL, Colson S (1994) Composite polymer electrolytes using fumed silica fillers: rheology and ionic conductivity. Chem Mater 6(12):2359–2363
Kirkwood K, Kirkwood J, Wetzel ED, Lee YS, Wagner NJ (2004) Yarn pull-out as a mechanism for dissipating ballistic impact energy in Kevlar KM-2 fabric. Part I: quasi-static characterization of yarn pull-out. Tex Res J 74(10):920–928
Larson RG (1999) The structure and rheology of complex fluids. Oxford University Press, New York
Lee YS, Wagner NJ (2003) Dynamic properties of shear thickening colloidal suspensions. Rheol Acta 42:199–208
Lee YS, Wagner NJ (2006) Rheological properties and small-angle neutron scattering of a shear thickening nanoparticle dispersion at high shear rates. Ind Eng Chem Res 45:7015–7024
Lee YS, Wetzel E, Wagner N (2003) J Mater Sci 38:2825–2833
Maranzano BJ, Wagner NJ (2001) The effect of interparticle interactions and particle size on reversible shear thickening: hard spheres colloidal dispersions. J Rheol 45(5):1205–1222
Maranzano BJ, Wagner NJ (2002) Flow-small angle neutron scattering measurements of colloidal dispersion microstructure evolution through the shear thickening transition. J Chem Phys 117(22):10291–10302
Nguyen QD, Jensen CTB, Kristensen PG (1998) Experimental and modelling studies of the properties of maize and waxy maize starch pastes. Chem Eng J 70:165–171
Osuji CO, Kim C, Weitz A (2008) Shear thickening and scaling of the elastic modulus in a fractal colloidal system with attractive interactions. Phys Rev E 77:060402 (R)
Raghavan SR, Khan SA (1995) Shear-induced microstructural changes in flocculated suspensions of fumed silica. J Rheol 39(6):1311–1325
Raghavan SR, Khan SA (1997) Shear-thickening response of fumed silica suspensions under steady and oscillatory shear. J Colloid Interface Sci 185:57–67
Raghavan SR, Riley M, Fedwik PS, Khan SA (1998) Composite polymer electrolytes based on poly(ethylene glycol) and hydrophobic fumed silica: dynamic rheology and microstructure. Chem Mater 10(1):244–251
Raghavan SR, Hou J, Khan SA (2000a) Colloidal interactions between particles with tethered nonpolar chains dispersed in polar media: direct correlation between dynamic rheology and interaction parameters. Langmuir 16:1066–1077
Raghavan SR, Walls HJ, Khan SA (2000b) Rheology of silica dispersions in organic liquids: new evidence for solvation forces dictated by hydrogen bonding. Langmuir 16(21):7920–7930
Sánchez A (2006) Colloidal gels of fumed silica: microstructure, surface interactions and temperature effects. PhD thesis, North Carolina State University
Sims ND, Stanway R, Johnson AR (1999) Vibration contributing smart fluids: a state-of-the-art review. Shock Vibr Dig 31(3):194–203
Torró-Palau AM, Fernández-García AC, Orgilés-Barceló MM, Martín-Martínez JM (2001) Characterization of polyurethanes containing different silicas. Int J Adhes Adhes 21:1–9
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We would like to express our gratitude to Degussa A.G. for supplying kindly Aerosil®R816.
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Galindo-Rosales, F.J., Rubio-Hernández, F.J. & Velázquez-Navarro, J.F. Shear-thickening behavior of Aerosil® R816 nanoparticles suspensions in polar organic liquids. Rheol Acta 48, 699–708 (2009). https://doi.org/10.1007/s00397-009-0367-7
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DOI: https://doi.org/10.1007/s00397-009-0367-7