在這項研究中，我們使用了一個高壓密度儀來測量離子液體溶液在溫度介於298.15 K至348.15 K，壓力為0.1至 50 MPa的密度數據。這些混合物溶液共含11組雙成分系統，其中包含3種溶劑：anisole, acetophenone和2-propanol和5種離子液體： [ C3mpip ] [ NTf2]，[ C3mpyr ] [ NTf2]，[ C4mim ] [ NTf2]，[ Et2MeS ] [ NTf2]和[ Bmpy ] [ NTf2]。在整個壓力範圍內的密度數據可用Tait模式準確關聯。
過剩體積可由實驗的密度數據計算來取得。在一般情況下，在離子液體富集區之外其過剩體積皆為負值。這些混合物的過剩體積與組成之變化均可用Redlich-Kister和modified Redlich-Kister模式表示。實驗所得知雙成份PVT數據均可用FOV與Schotte狀態方程式準確關聯，各系統之雙成份交互作用參數可由雙成份之PVT數據擬合狀態方程式訂定。 Schotte狀態方程式關聯結果略優於FOV狀態方程式。

In this study, we used a high-pressure vibrating tube densimeter to measure the densities of ionic liquid solutions at temperatures from 298.15 K to 348.15 K and pressures from 0.1 to 50 MPa. The mixture solutions included 11 binary systems, which contained 3 solvents : anisole, acetophenone, and 2-propanol, and 5 ionic liquids : [C3mpip][NTf2], [C3mpyr][NTf2], [C4mim][NTf2], [Et2MeS][NTf2], and [Bmpy][NTf2]. The Tait equation correlate well the experimental density data over the entire pressure range.
The excess volumes were calculated from the experimental density data.. In general, the excess volumes are negative except in the ionic liquid-rich region.. The Redlich-Kister and the modified Redlich-Kister model represented well the excess volumes varying with composition at specific temperature and pressure. The FOV (Flory-Orwoll-Vrij) and the Schotte equations of state were also employed to correlate the PVT data. The binary interaction parameter for each binary system was determined by fitting the binary PVT data to the equations of state. The Schotte equation of state is slightly better than the FOV equation of state.

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