Monomolecular film preparation instrument

Abstract

Disclosed is a monomolecular film preparation instrument. A mounting rack is arranged on the outer wall of a constant temperature water bath. The mounting rack is provided with an interfacial tension detector, a film coating device and a controller. The constant temperature water bath is arranged in a dust-free tank. The cross section of the constant temperature water bath is a circle. A motor is arranged at the top of the mounting rack. The motor is connected with the controller through a wire. A power output shaft of the motor is provided with a rotating shaft. The other end of the rotating shaft is provided with a movable sliding barrier and the movable sliding barrier stretches into the rotating shaft in the water bath. The center line of the rotating shaft coincides with the center line of the constant temperature water bath. A fixed sliding barrier is arranged on the inner wall of the constant temperature water bath. The lower surface of the movable sliding barrier and the lower surface of the fixed sliding barrier are located on the same plane. The length of the movable sliding barrier and the length of the fixed sliding barrier are the same and equal to the inner section radius of the constant temperature water bath. The bottom of the constant temperature water bath is provided with a liquid discharging pipe 11 which stretches out of the dust-free tank and is provided with a liquid stopping valve. A computer is arranged on the outer side of the dust-free tank. The controller is connected with the computer through a wire.

Description

technical field [0001] The invention belongs to the technical field of measuring the chemical or physical structural properties of monomolecular layer materials, and in particular relates to a monolayer film preparation system with adjustable liquid-gas interface concentration. Background technique [0002] Self-assembled monolayer film refers to the thermodynamically stable and lowest-energy monolayer film formed by molecules interacting through chemical bonds and spontaneously adsorbing on the gas / liquid or gas / solid interface. The formation of self-assembled monomolecular film is based on the chemical bonding of the head group of long-chain organic molecules on the substrate, the van der Waals interaction between the film-forming molecular chains, and the interaction between special functional groups on the molecular chains. The interaction of different kinds of forces promotes the self-assembly process, and also promotes the recombination of self-assembled molecules from...

AI Technical Summary

Problems solved by technology

The water tank of the existing film forming instrument is rectangular and the temperature is provided by heating the bottom of the water tank. The depth of the water tank is small. When studying the collapse mechanism and collapse phenomenon of the monolayer film during the film production process, the monolayer film often overflows the subphase interface due to the existence of pressure. Cause environmental pollution, lead to failure of film production, and uneven heating of the water tank, and the existing film forming apparatus is placed in the air to form films, the subphase is easy to evaporate, it is difficult to form a uniformly dispersed film, the film forming area is small and the shape of the film Irregularity, and the concentration of film-forming materials cannot be controlled, the success rate of film formation is low, and the obtained monomolecular film area-surface pressure curve has a large error

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