Silver-plated conductive polyester fiber and preparation method thereof

Abstract

The invention discloses a silver-plated conductive polyester fiber and a preparation method thereof, belonging to the field of conductive fibers. The silver-plated conductive polyester fiber comprises a polyester fiber, a silver layer coating the surface of the polyester fiber, and an ITO (Indium Tin Oxide) layer between the polyester fiber and the silver layer. The preparation method comprises the following steps in sequence: washing away an oil agent from the fiber, roughening the surface of the fiber, coating the roughened surface with an ITO sol layer, sensitizing, and plating with silver. By virtue of the introduced ITO sol layer between the silver layer and the fiber, on the one hand, the affinity of a metallic simple substance and a fiber polymer can be achieved, so that the combination strength of the silver layer and the fiber is enhanced; on the other hand, an ITO-Ag composite structure is built on the surface of the fiber; and by virtue of the composite structure, the conductivity of the silver-plated conductive fiber can be enhanced remarkably, and simultaneously the thickness of the plating layer can be reduced. The technology is simple, the conditions are moderate and the requirement on large-scale production is satisfied.

Description

technical field [0001] The invention relates to a silver-plated conductive polyester fiber and a preparation method thereof, belonging to the field of conductive fibers. Background technique [0002] The development of electroless silver-plated conductive fibers originated in the late 1990s, according to "Research and Development of Silver-plated Conductive Fibers, International Textile Herald, 1999, 4;" and the Chinese patent "A Chemical Silver Plating Method for Organic Fibers", 2000, 3 records; its typical silver plating method mainly comprises: wash with organic solvents such as acetone to remove fiber oil agent; The fiber after degreasing is soaked in the hydrochloric acid (or NaOH) solution of certain concentration, makes the surface roughness of fiber increase; After roughening the fiber surface in a certain concentration of SnCl 2 Sensitization in the solution, so that a small amount of reducing SnCl adheres to the surface of the fiber 2 ; The sensitized fibers reu...

AI Technical Summary

Problems solved by technology

[0011] 1. The contact between the silver-plated layer and the fiber is not close enough. Since the fiber is an organic substance, the silver layer is a simple metal substance, and its bonding point is the depression on the surface of the fiber after surface roughening;

[0012] 2. In order to increase its contact area, the concentration of the surface roughening solution is often high, and the surface roughening time is longer, which affects the strength of the fiber;

[0013] 3. In order to meet the needs of electrical conductivity, the concentration of silver-plating solution for silver-plated fibers is relatively high, resulting in waste of raw materials;

[0014] 4. In order to get a thicker coating, the silver plating time is longer;

[0015] 5. If the silver plating layer is too thick, the flexibility of the fiber will be greatly affected;

[0016] 6. The uniformity of the coating is poor, the surface is uneven, and the uniform thickness of the coating cannot be achieved on a single fiber;

[0017] 7. Due to the uneven thickness of the coating, the conductivity of the fiber is mostly measured in the form of short fibers, and the resistivity of some products is still very large;

[0018] 8. The precious metal palladium is only used as the nucleation point of silver, and it cannot substantially improve the conductivity of the silver-plated fiber. While increasing the cost of the silver-plated fiber, it causes a waste of resources

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