A kind of nano-gold-silver alloy solution with affinity to fibers and preparation method thereof

Abstract

The invention relates to a nano-gold-silver alloy solution having affinity for fibers and a preparation method thereof. In the preparation method, silver ions and gold ions are respectively added to a deionized aqueous solution of an amino-terminated hyperbranched polymer, stirred and heated, Prepare nano-silver solution and nano-gold solution respectively, then mix nano-silver solution and nano-gold solution in proportion, first carry out high-temperature hydrothermal reaction, and then cool to obtain nano-gold-silver alloy solution with core-shell structure; the nano-gold The silver alloy is quasi-spherical, with a particle size of 2-30nm; the nano-gold-silver alloy solution of the present invention can be completely adsorbed to the surface of the fiber at high temperature, does not release silver ions during use, and has good biological safety; Fibers such as wool, calcium alginate fiber, and chitin have strong molecular recognition and binding capabilities, and can be completely assembled on the fiber surface in a normal temperature or high temperature water bath, thereby solving the problems of poor affinity between nanomaterials and fibers, low loading efficiency, and environmental pollution.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a nanometer gold-silver alloy solution with affinity for fibers and a preparation method thereof. Background technique [0002] With the continuous development of nanotechnology, the synthesis and development of nano-precious metals are also progressing. Nanometallic materials possess a series of excellent physical and chemical properties, which are crucial to modern industry. For example, nano-gold, silver, platinum and other precious metals have a strong surface Raman enhancement effect, which can be widely used in trace element detection, replacing traditional ICP detection, reducing costs and achieving online rapid detection. Nano precious metals also have excellent catalytic effect and are the most important reagents in chemical industry. Among them, nano-platinum is the leader among precious metal catalysts, nano-platinum can catalyze hydrogen oxidation r...

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Problems solved by technology

[0004] Nevertheless, the application of nano-gold-silver alloys in the antibacterial field also has many insurmountable problems.

First, the stability of high-concentration nano-gold-silver alloy solution; nano-alloy agglomeration, oxidation, etc. will directly affect the antibacterial effect and antibacterial durability of the alloy, and the shelf life of the product will decrease, which is not good for industrial production

Second, nano-alloys lack the necessary active groups, and it is difficult to firmly bond to the surface of organic fibers. During the dyeing process, there are also problems such as low dyeing rate and high content of nano-waste water; this not only reduces the efficiency of functional finishing, but also increases the cost. Cause waste of precious metals and related environmental pollution problems

Third, the safety of nano-alloys

Although the above-mentioned patents have achieved antibacterial effects, the antibacterial effects are limited, and the adsorption to biological fibers such as cotton, hemp, silk, and wool is limited, and there are environmental pollution problems at the same time.

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