A kind of silver-plated conductive polyester fiber and preparation method thereof

Abstract

The invention discloses a silver-plated conductive polyester fiber and a preparation method thereof, which belong to the field of conductive fibers. The silver-plated conductive polyester fiber of the invention comprises polyester fiber and a silver layer coated on the surface layer of the polyester fiber, and the polyester fiber and the silver layer There is an ITO layer. The preparation method sequentially includes: washing out of fiber oil, roughening of fiber surface, coating of ITO sol layer, sensitization and silver plating. The present invention introduces an indium tin oxide (ITO) sol layer between the silver layer and the fiber. The introduction of the ITO layer can solve the affinity between the metal simple substance and the fiber polymer on the one hand, and improve the bonding fastness between the silver layer and the fiber. On the other hand, the introduction of this layer realizes the construction of an ITO-Ag composite structure on the surface of the fiber, which can significantly improve the conductivity of the silver-plated conductive fiber while reducing the thickness of the coating. And the process is simple, the condition is mild, and it is suitable for the needs of large-scale production.

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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