Supergravity field micro-reactor, and method for preparing nanometer material through liquid phase precipitation method

Abstract

The invention relates to a supergravity field micro-reactor for preparing a nanometer material. The supergravity field micro-reactor comprises a micro-reaction assembly, a material receiving groove provided with a material outlet, a first motor, a transmission system, a material inlet system and a support system, wherein the micro-reaction assembly comprises an upper disc and a lower disc, micro-grooves are respectively distributed on the bottom surface of the upper disc and the top surface of the lower disc, the center position of the lower disc is provided with a material inlet micro-pore channel, a 0.03-0.1 mm gap is arranged between the bottom surface of the upper disc and the top surface of the lower disc after the combination, the first motor drives the transmission system to operate so as to make the upper disc and the lower disc in the micro-reaction assembly rotate in opposite rotation directions, and an upper disc lifting system can be additionally arranged so as to conveniently adjust the gap between the bottom surface of the upper disc and the top surface of the lower disc in the micro-reaction assembly and wash the upper disc and the lower disc. With the supergravity field micro-reactor of the present invention, the nanometer material is prepared by using the liquid phase precipitation method, such that the high dispersion property and the uniform particle distribution of the nanometer material can be maintained while the treatment capacity can be increased and the clogging of the micro-reaction assembly can be avoided.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction, and in particular relates to a supergravity field micro-reactor for preparing nanomaterials and a method for preparing nanomaterials by liquid phase precipitation. Background technique [0002] Nanomaterials have attracted much attention in recent years, and have shown important application value in many fields by virtue of their unique surface effects, volume effects, quantum size effects, and macroscopic quantum tunneling effects, which are different from conventional materials. [0003] During the preparation of nanomaterials, the particle nucleation characteristic time t N 1ms level, microscopic mixing homogenization characteristic time t m =k m (v / ε) 1 / 2 (k m is a constant), in order to ensure high dispersion and uniform distribution of particle size, it is required that t m <t N , while in a conventional mechanically stirred tank reactor, t m =5~50ms, greater than t N ,...

AI Technical Summary

Problems solved by technology

However, there are still two problems in the industrial application of these microreactors: first, the processing capacity is small, and industrial scale-up is difficult. Since the micro-channel or membrane pore size is usually at the micron level, the flow rate is limited, and the single-channel processing capacity is extremely small. In order to achieve industrialized processing capacity, microreactors are usually enlarged in parallel, and when the number of microchannels increases sharply, the complexity of detection and control of microreactors will increase; The reactor generally integrates many microchannels or membrane pores in a closed chamber, and the inner diameter of the microchannels or membrane pores is narrow. The nanoparticles formed by the reaction or impurities in the raw materials can easily cause the microchannels to be blocked and difficult to clean.

In order to prevent blockage, it is generally connected to an external processing device, such as the Flow Plate microreactor designed by Lonza, through an external connection to an ultrasonic device, to generate ultrasonic cavitation inside the fluid to prevent blockage, but to prevent blockage through an external connection device Causes complex structure and increased cost, which is not conducive to industrialization promotion

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