Temperature-controllable solvent vapor pressure gradiometer

Abstract

The invention provides a temperature-controllable solvent vapor pressure gradiometer which comprises a solvent diffusion tube (1), a temperature controlling cylinder (2), a temperature controlling cavity (3) for the solvent diffusion tube, an inlet tube (4) for the temperature controlling cavity for the solvent diffusion tube, an outlet tube (5) for the temperature controlling cavity for the solvent diffusion tube, a cover (6), an inner cylinder (7), an outer cylinder (8), a temperature controlling cavity (9) for the cover, an inlet tube (10) for the temperature controlling cavity for the cover, an outlet tube (11) for the temperature controlling cavity for the cover, a bracket (12), a flexible tube (13), a sample placing hole (14) and a ground stopper (15). The solvent vapor pressure gradient is obtained by diffusion of solvent vapor along the solvent diffusion tube; under the condition of balance, different positions in the solvent diffusion tube correspond to different solvent vaporpressure; and the temperature of the solvent diffusion tube and the temperature of the cover are respectively controlled by temperature controlling liquid. The temperature-controllable solvent vaporpressure gradiometer can be used for phase transition analysis and parameter measurement of materials, optimization experiments for processing conditions of materials, controllable reaction and surface chemical reaction of condensed state-gaseous state, surface absorption and the like.

Description

technical field [0001] The invention relates to a temperature-controllable solvent vapor pressure gradient instrument. Background technique [0002] A certain amount of solvent vapor pressure is often used in scientific experiments, and sometimes a continuously adjustable solvent vapor pressure is required. The current conventional practice is to mix saturated solvent vapor with air or inert gas, and adjust the solvent vapor pressure through the mixing ratio. The disadvantages of this method are: large solvent loss and serious air pollution; the mixing ratio is difficult to control for long-term stability; the temperature control of the system is difficult to achieve. (References [1] Kruger, K.M.; Sadowski, G. Macromolecules 2005, 38, 8408 [2] Cavicchi, K.A.; Russell, T.P. Macromolecules 2007, 40, 1181) Contents of the invention [0003] In order to solve the technical problem of solvent vapor pressure gradient, the object of the present invention is to provide a tempera...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: large solvent loss and serious air pollution; the mixing ratio is difficult to control for long-term stability; the temperature control of the system is difficult to achieve

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