ON THE NON-FREEZING WATER INTERLAYERS BETWEEN ICE AND A SILICA SURFACE

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 surfa ces of very thin quartz capillaries (radius r almost-equal-to 1 mum). Reversible H(T) dependences are obtained in the temperature range from -0.2 to -1.5 The values of H(T) increase with increasing radius of th e sol particles and with pressure P. Values of the heat of ice melting calculated from experimental data using the Clapeyron-Clausius equati on 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 m easured shift rates of ice columns in quartz capillaries. In the regio n where t > -0.5-degrees-C and H > 10 nm the viscosity is about 2-3 ti mes higher compared with that of bulk water.