On the non-freezing water interlayers between ice and a silica surface

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Abstract

A capillary dilatometer was used for measuring the thickness H of non-freezing water interlayers between ice and the surfaces of silica sol particles (radius R = 68, 56 and 16 nm), and between ice and the surfaces of very thin quartz capillaries (radius r ≈ 1 μm). Reversible H(T) dependences are obtained in the temperature range from −0.2 to – 1.5°C. The values of H(T) increase with increasing radius of the sol particles and with pressure P. Values of the heat of ice melting calculated from experimental data using the Clapeyron-Clausius equation are close to the known values for bulk ice.

Values of the viscosity of non-freezing water interlayers were assessed on the basis of the measured shift rates of ice columns in quartz capillaries. In the region where t > −0.5°C and H > 10 nm the viscosity is about 2–3 times higher compared with that of bulk water.

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