Chemical spray silvering method of fabric

Abstract

The invention discloses a chemical spray silvering method of a fabric. The chemical spray silvering method comprises the following process steps: I, preprocessing the fabric so as to form a catalytic activity center on the surface of the fabric; and II, carrying out chemical spray silvering on the texture, and enabling the metallic silver to deposited onto the surface of a polyester fabric; the chemical spray silvering process is carried out by adopting a two-step spray-up way; and the reducing solution and the silver salt solution are respectively sprayed on the surface of the fabric during spraying up. According to the chemical spray silvering method, the reducing agent solution is not directly contacted with the silver salt solution in the implementation process of the method, so that the generation of self-decomposing reaction of the spray liquid can be avoided, and the problems of instability and environmental pollution caused by the spray liquid can be solved; and furthermore, the reducing agent solution and the silver salt solution can be recycled, and therefore, the consumption of the spray liquid can be reduced, and the cost can be lowered.

Description

technical field [0001] The invention relates to the field of textiles, in particular to a method for chemically spraying silver on fabrics including polyester fabrics. technical background [0002] There are many methods for metallizing non-metallic surfaces, but most of them require high equipment, difficult operation and narrow application range. Electroless plating is a method that does not require electricity, and based on the principle of redox reaction, uses a strong reducing agent in a solution containing metal ions to reduce metal ions to metal and deposit them on the surface of various materials to form a dense coating. The electroless plating method is widely used because it is not limited by the shape of the material, it is simple and easy to operate, and the plating layer is highly controllable. Compared with electroplating, electroless plating does not require DC power supply and is not affected by uneven distribution of power lines, so it is widely used in pla...

AI Technical Summary

Problems solved by technology

Due to the high standard potential of silver, the potential difference with the reducing agent is relatively large, so that Ag + Reduction from the bulk of the solution, resulting in instability of the electroless silver plating solution

At the same time, electroless silver plating is not a self-catalyzed reaction, and only one layer of silver can be plated at one time. If the thickness is not enough, repeated plating is required.

In addition, during electroless silver plating, the deposition rate is very critical. If the deposition rate is too slow, the utilization rate of silver will not be high, and the bonding force with the substrate will be relatively weak; if the plating speed is too fast, the plating solution will be easily decomposed, and the Affects the bonding force with the matrix

Therefore, the technical solution currently adopted is prone to the following problems: the plating solution is self-decomposed and scrapped prematurely, causing part of the silver to be discharged with the waste solution; in order to stabilize the plating solution, a stabilizer is often added, which will cause the plating speed to be too slow and the production efficiency to be low; The consumption of plating solution is large and the cost is high; there is a lot of waste solution and serious environmental pollution

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