Phase diagram of water confined in MCM-41 up to 700 MPa.
On the basis of measurements of NMR signal intensity and T1 and T2(*) relaxation times as a function of temperature (290 K-170 K) and pressure (0.1 MPa-700 MPa), the p-T phase diagram was made for the sample containing water inside and outside MCM-41 pores of 1.81 nm in radius. The temperature of nucleation of water confined in nanopores under normal pressure was 230 K. With increasing pressure this temperature decreased to 200 K under 300 MPa, but with further increase in pressure it did not change.
Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland.
A
A
Pajzderska
Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland.
P
P
Bilski
Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland.
J
J
Wąsicki