Ferroferric oxide copper-loaded nanoparticle as well as preparation method and application thereof in preparation of root retarding material

Abstract

The invention discloses a ferroferric oxide copper-loaded nanoparticle as well as a preparation method and application thereof in preparation of a root retarding material. The ferroferric oxide copper-loaded nanoparticles refer to nanoparticles formed by loading reduced copper nanogrannules uniformly on the surfaces of ferroferric oxide nanospheres, wherein the weight ratio of ferroferric oxide to reduced copper in each nanoparticle is 1:(0.3-1.2). The method comprises the following steps: dispersing ferroferric oxide nanospheres in chloroform; sequentially adding a copper chloride solution, sodium citrate and hydrolyzed gelatin, performing stirring at a temperature of 40-50 DEG C for 2-4 h, performing washing, and performing magnetic attraction to separate products so as to obtain the ferroferric oxide copper-loaded nanoparticles. The root retarding effect of a root retarding agent product prepared by utilizing the ferroferric oxide copper-loaded nanoparticle as an additive is achieved by virtue of interference of copper ions on substances in plants and destruction to root cell membranes while the copper ions are in contact with root cells, taproot growth is inhibited, lateral root growth is promoted, and root retardance and puncture prevention effects are achieved.

Description

technical field [0001] The invention relates to the field of root-blocking agents for ecological buildings; in particular, it relates to ferric iron tetroxide-loaded copper nanoparticles, a preparation method thereof, and an application in preparing root-blocking materials. Background technique [0002] With the development requirements of building greening, planted roofs are rapidly developing and popularized in my country. A major problem facing planted roofs is to prevent plant roots from growing downward and destroying building structures. Copper ions can inhibit plant root growth and hinder root elongation. Reduce root mass. [0003] At present, most of the root-resistance materials in China use copper base or copper salt as the source of resistance. Copper-based polymer coils have been widely used on planted roofs, but they require a large amount of copper and are costly. There is the problem that the interface between the metal and the polymer is not firmly bonded, an...

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Problems solved by technology

[0006] The first purpose of the present invention is to provide a copper ferric oxide-loaded nano-particle and its preparation method. The method is optimized for the existing copper or copper salt as a root inhibitor, which has a large amount of copper and high cost. The production and preparation of copper root resistance agent, and greatly overcome the shortcomings of metal copper and single copper ion in the actual use of root resistance, through the addition of copper nanocomposite materials, the durability of the coil is enhanced, and the additives are optimized Compatibility in polymer matrices; the method utilizes copper nanomaterials and ferric oxide (Fe 3 o 4 ) The advantages of nanomaterials are:

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