Method for producing nanoparticles by forced ultra-thin film rotary processing

Abstract

A method for producing nanoparticles is characterized in that two processing surfaces capable of approaching each other and separating from each other and rotating relative to each other are held with a small gap of 1 mm or less, that the space between the surfaces is used as a passage for a fluid under processing, and that a forced thin film of the fluid is formed and nanoparticles are precipitated in the forced thin film.

Description

technical field [0001] The invention of the present application relates to a nanoparticle production method for processing an object to be processed between processing surfaces of a processing member which is capable of approaching and separating at least one of which is relatively rotated relative to the other. Background technique [0002] Non-Patent Document 1: Mitsue Koizumi (et al.), "Latest Technology of NanoMaterial", 1st Edition, Published by Symi Co., Ltd., April 2001 [0003] Non-Patent Document 2: Edited by the Nanotechnology Handbook Editorial Committee, "NanoTechnoloji Handbook-I Compiled Creation", 1st Edition, OIM Co., Ltd., May 2003 [0004] Patent Document 1: Japanese Unexamined Patent Publication No. 7-144102 [0005] Patent Document 2: JP-A-2002-97281 [0006] Patent Document 3: JP-A-2007-8924 [0007] Patent Document 4: JP-A-2004-49957 [0008] Microparticles with a volume average particle diameter of less than 1 μm in the particle size distribution (...

AI Technical Summary

Problems solved by technology

However, in the case of using a general microreactor, although there are some advantages of micro devices and systems, in fact, if the diameter of the micro flow path becomes narrower, the pressure loss is inversely proportional to the fourth power of the flow path, that is In fact, it is difficult to obtain a pump that feeds the fluid and requires a large liquid delivery pressure. In addition, in the case of a reaction accompanied by precipitation, the phenomenon of product clogging in the flow path or the closure of the microfluidic path caused by bubbles generated by the reaction, Furthermore, the reaction is basically expected in terms of the diffusion rate of molecules, so the microspace cannot be said to be effective and suitable for all reactions. In reality, there is a need to try out the reaction in a trial-and-error manner and to select a good beginning and end. There are many problems

Furthermore, even for scaling up, the method of increasing the number of microreactors itself, that is, solving by stacking (numbering up), but in fact, the number of layers that can be stacked is limited to tens of layers, and stacking is only used for products with high value. In addition, as the number of devices increases, the absolute number of causes of their failures also increases. In fact, in the case of problems such as congestion, it may become very difficult to find out the location of the failure, etc., or the location of the problem.

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