Phase diagram of water confined in MCM-41 up to 700 MPa

A Pajzderska; P Bilski; J Wąsicki

doi:10.1063/1.4913427

Phase diagram of water confined in MCM-41 up to 700 MPa

J Chem Phys. 2015 Feb 28;142(8):084505. doi: 10.1063/1.4913427.

Authors

A Pajzderska¹, P Bilski¹, J Wąsicki¹

Affiliation

¹ Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland.

PMID: 25725743
DOI: 10.1063/1.4913427

Abstract

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.