Separation and purification device and method for one-dimensional nano material

Abstract

The invention discloses a separation and purification device and method for a one-dimensional nano material. The separation and purification device comprises a filter, a stock solution tank, a particle-containing waste liquid tank, a deionized water tank and a tank for liquid containing the one-dimensional material. The separation and purification method includes the steps of firstly, preparing astock solution; secondly, setting up the separation and purification device; thirdly, performing separation and purification, to be more specific, performing filtering and backwashing to obtain the dispersion liquid of the one-dimensional nano material. By the separation and purification method which is green, environmentally friendly and simple to operate, continuous separation and purification of the one-dimensional nano material can be achieve, separation and purification efficiency is increased greatly, the use of chemical reagents harmful to human bodies is not needed, and the one-dimensional nano material which is single in morphology, high in purity and uniform in dimension distribution can be obtained.

Description

Technical field [0001] The invention relates to a one-dimensional nano material separation and purification device and method. Background technique [0002] As people's demand for thinner, lighter, and lower-cost optoelectronic devices and related electronic display devices has grown rapidly, the transparent conductive film material market has expanded rapidly. In the field of optoelectronics, one-dimensional nanomaterials, as a new type of material that can be used to replace ITO, have very broad application prospects. At present, one-dimensional nanomaterials are mainly prepared by polyol reduction method, usually using ethylene glycol as solvent and reducing agent, and the boiling point of ethylene glycol is low (below 200℃), which is not conducive to Ostwald ripening The progress of the process will cause the yield of one-dimensional nanomaterials to be too low. One-dimensional nanomaterials contain a large number of nanoparticles. In the later stage, centrifugal separation ...

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Problems solved by technology

At present, one-dimensional nanomaterials are mainly prepared by the reduction method of polyols, usually using ethylene glycol as a solvent and reducing agent, and ethylene glycol has a low boiling point (less than 200 ° C), which is not conducive to Ostwald ripening The progress of the process will lead to a low yield of one-dimensional nanomaterials. One-dimensional nanomaterials contain a large number of nanoparticles, which need to be separated by centrifugation and other methods in the later stage, resulting in a decrease in production efficiency and an increase in production costs.

[0003] At present, the separation and purification of one-dimensional nanomaterials is mainly done by precipitation and centrifugation. Although good separation and purification effects can be achieved, the following problems exist: 1) The environment is seriously polluted: during the process of precipitation and centrifugation, some A certain amount of acetone is proportional to the amount of one-dimensional nanomaterial dispersion to be separated. After the separation, the amount of acetone does not decrease. Due to the lack of recycling mechanism, it can only be treated as waste liquid in the end, which will cause environmental damage. 2) Low separation efficiency: Both sedimentation and centrifugation are limited by the capacity of the container used, cannot operate continuously, and take up a lot of space, which will greatly reduce production efficiency

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