Nozzle for micro and nano material preparation by interior mixing supercritical fluid

Abstract

The invention belongs to the nanometer micro material preparing device, which especially relates to an internal mixed hypercritical fluid nanometer micro material preparing nozzle. The invention is formed by a nozzle main body and a taper end sheath and a collector which are mounted on the main body; wherein, the tail of said main body is a nozzle core; the main body and the taper end sheath are positioned by positioning surface, locked by screw connection and adjusting locking element, and sealed by sealing ring; the taper end sheath and the nozzle core form the annular slit as the nozzle; the nozzle via the feeding channel of main body is connected to the material feeding channel; the collector is outside the main body and the taper end sheath to be fixed on the main body; the collector has a valve. The invention has reasonable structure which can mix several materials synchronously to be sprayed, to realize internal mixed hypercritical fluid nanometer micro particle preparation. The annular slit of nozzle can be adjusted easily to avoid jam and prepare smaller particle. The invention can reduce the cost and improve the efficiency.

Description

1. Technical field [0001] The invention belongs to equipment for preparing nano and micro materials, and particularly relates to an internal mixing type supercritical fluid nano and micro material preparation nozzle. 2. Background technology [0002] The preparation of supercritical fluid nanomaterials includes rapid expansion method, antisolvent method, aerosol extraction method, solution-enhanced supercritical fluid dispersion method, etc., all of which require a nozzle with a very small aperture. In addition to the very small aperture of this type of nozzle, there are also considerable differences in structure. The internal mixing nozzle is a typical structure. It is characterized by mixing and spraying more than one solution. Spray the nozzle into another solution from the inner layer of the nozzle, and then spray the quickly mixed solution into another new solution from the nozzle hole of the next layer, and so on, until all the solutions are completely mixed from the nozzle...

AI Technical Summary

Problems solved by technology

The nozzles made by this method are easy to be blocked, and it is not easy to unblock after being blocked, and the materials and production costs of the nozzles are very high, so once blocked, it will cause great waste

In addition, since the size of the nozzle aperture has a great influence on the preparation of nano and micro materials, it is an important factor affecting the preparation process, and the aperture of this type of nozzle cannot be adjusted, especially in the research of material preparation, the nozzle should be replaced frequently

In this way, it is necessary to make multiple nozzles for different material preparation and research needs, which greatly increases the cost of material preparation and research

In addition, the aperture of existing nozzles is very small, the number of nozzles is limited, the amount of prepared nano-micro materials is small, the efficiency is low, and the measurement and detection errors are large.

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