This study provides a rapid and low-energy method for the preparation of nanocomposite hydrogels with excellent mechanical properties and electrical conductivity.
Extractive
distillation is often used to separate difficult separation
systems so as to realize the recovery and utilization of resources
in industry. Based on the separation of ethylene glycol (EG), isoamyl
alcohol, and water, the separation of ternary azeotropic mixtures
by extractive distillation was studied. The study of extraction mechanism
is very important for solvent screening and molecular design. To compare
the selectivity of solvents, the interaction energies between solvent–water,
solvent–EG, and solvent–isoamyl alcohol were calculated
by the quantum chemical method. Atoms in molecules, reduced density
gradient, and electrostatic potential were used to study the microextraction
mechanism of solvents in the water–EG–isoamyl alcohol
system. In extractive distillation, vapor–liquid equilibrium
(VLE) data is used as the basic data for designing and optimizing
the process. In order to solve the problem of lack of VLE data between N,N-dimethylformamide, dimethyl sulfoxide,
choline-based deep eutectic solvents, and azeotropes, the VLE experiment
of the solvent and azeotrope system was carried out. In this work,
the selectivity of different solvents was compared by the quantum
chemical method, the microextraction mechanism of solvents was explored,
and the lack of VLE experimental data was supplemented, which provided
theoretical guidance for the selection and design of solvent molecules
with excellent performance.
In this paper, betaine (Bet) was used as a hydrogen bond acceptor (HBA), and acrylic acid (AA) and acrylamide (AM) were used as hydrogen bond donors (HBD) and mixed to form a deep eutectic solvent (DES).
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