Hybrid material water solution loading metal nanoparticles, and preparation method thereof

Abstract

The invention relates to a hybrid material water solution loading metal nanoparticles, and a preparation method thereof. The hybrid material water solution is a solution formed by dissolving a hybrid material in water. The hybrid material is composed of carrier molecules A, stabilizing agent molecules B and metal nanoparticles. The method comprises the following steps: a water solution of A and a water solution of B are mixed by stirring; the pH of the mixed solution is regulated; a metal ionic salt solution and a reducing agent solution are sequentially dropped into the mixed solution; and stirring is carried out, such that the hybrid material water solution is obtained. In the hybrid material, the metal nanoparticles are stably and effectively connected to the molecular chain of carrier molecules in forms of ion bonds and coordination bonds, such that the hybrid material has the advantages of good solubility and adjustable metal nanoparticle loading amount. The preparation method of the hybrid material water solution has the advantages of no pollution, less product impurity and simple operation. The prepared hybrid material solution loading metal nanoparticles can be widely applied in the aspects of antibacterial finishing solutions, self-assembly stock solutions, catalysis materials and the like.

Description

technical field [0001] The invention relates to an aqueous solution of a hybrid material loaded with metal nanoparticles and a preparation method thereof, in particular to a stable water-soluble aqueous solution of a hybrid material loaded with metal nanoparticles and a preparation method thereof. Background technique [0002] Hybrid materials loaded with metal nanoparticles refer to the bonding of metal nanoparticles to carrier molecules through chemical bonds or physical bonds. This type of hybrid materials is widely used in metal ion adsorption materials, catalytic materials, self-assembly units, antibacterial materials, flame retardant materials, etc. [0003] The hydroxyl group, amino group, carboxyl group and other groups in the carrier molecule have a good chelating effect on the metal nanoparticles, and can effectively adsorb or trap the metal nanoparticles in the solution. In the process of particle nucleation and growth, in order to obtain monodisperse nanoparticl...

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Problems solved by technology

Judging from the patents and literatures that have been published so far, although a large number of studies have focused on the preparation of nano-silver particles, the traditional method of synthesizing nanoparticles using green and environmentally friendly methods has uneven distribution of particle size and stability of nanoparticles. poor

Disclosed a kind of method that adopts sodium carboxymethyl cellulose as reducing agent and protective agent to prepare nano-silver particles as disclosed in the patent CN101121203A, but wherein used sodium carboxymethyl cellulose does not provide detailed molecular weight, prepares The particle size and shape of the nanoparticles are not uniform, and microwave heating devices are needed in the implementation process, which is not conducive to large-scale industrial production

In CN103480859A, the oxidized codran polysaccharide and silver nitrate solution containing carboxyl groups are used to form a mixed solution in equal volumes, and polysaccharide-based silver nanoparticles are prepared, but the particle size and shape of the prepared nano-silver products are not uniform

Another example is that although CN101450385A partially solves the problem of uniform morphology of nano-silver products, the reaction conditions must be up to 90°C, and the reaction time must be up to 20 hours, which seriously affects industrial efficiency.

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