Rheology of silica suspensions stabilized by ethylenediamine

• Autorzy: Gaishun, V. E. , Potapenok, Y. A. , Tulenkova, O. I. , Pakhovtchyshin, S. V. , Stręk, W.
• Języki publikacji: EN

Abstrakty

EN

The effect of ethylenediamine bridging, particle size and specific surface area of fumed silica on rheological properties of silica suspensions were studied with a cylinder rheometer. The apparent viscosity of suspensions of aerosils A-50, A-175, A-300 and A-380 irreversibly increases with shearing time at shear rates above a certain value. The critical shear rate for shear-induced bridging coagulation decreases with the increasing ethylenediamine concentration because of lowering of the energy barrier due to a compression of the electrical double layer. The suspensions become elastic pastes after the bridging coagulation.

Słowa kluczowe

EN

silica; suspension; ethylenediamine; rheological properties; viscosity

• Czasopismo: Materials Science
• Rocznik: 2003
• Tom: Vol. 21, No. 4
• Strony: 481-485
• Opis fizyczny: Bibliogr. 4 poz.,

Twórcy

autor

Gaishun, V. E.

• Francisk Skorina Gomel State University, 104 Sovetskaya St., Gomel, 246019, Belarus,

autor

Potapenok, Y. A.

• Francisk Skorina Gomel State University, 104 Sovetskaya St., Gomel, 246019, Belarus

autor

Tulenkova, O. I.

• Francisk Skorina Gomel State University, 104 Sovetskaya St., Gomel, 246019, Belarus

autor

Pakhovtchyshin, S. V.

• Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov St., 03680 Kyiv, Ukraine

autor

Stręk, W.

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 2 Okólna St., 50-950 Wrocław, Poland

Bibliografia

• [1] OTSUBO Y., WATANABE K., J. Colloid Interface Sci., 127 (1988), 214.
• [2] GAISHUN E., TULENKOVA O.I., MELNICHENKO I.M., BARYSHNIN S.A., POTAPENOK Y.A., XLEBOKAZOV A.P., STRĘK W., Mater. Sci., 20 (2) (2002), 19.
• [3] HUNTER R.J., Zeta Potential in Colloid Science, Academic Press, New York, 1981.
• [4] STUMM W., MORGAN J.J., Aquatic Chemistry, Wiley, New York, 1981.