Preparation method of polylactic acid/sliver composite conductive fiber

Abstract

The invention discloses a preparation method of polylactic acid / sliver composite conductive fiber. The preparation method comprises the following steps of: (1), plastifying and modifying polyvinyl alcohol, wherein the polyvinyl alcohol, polyhydric alcohols and flow promoter are added to a high-speed mixer for uniformly mixing under the condition of 50 DEG C to 70 DEG C to obtain plastified polyvinyl alcohol slices in a double-screw extruder or a single-screw extruder; (2), spinning blended fiber, wherein the plastified polyvinyl alcohol slices and polylactic acid slices are added to a normal fusion spinning machine for spinning to obtain polyvinyl alcohol / polylactic acid blended fiber; (3), removing polyvinyl alcohol by dissolving, wherein the polyvinyl alcohol / polylactic acid blended fiber is placed in water of 40 DEG C to 90 DEG C for 20-60 minutes to obtain polylactic acid porous fiber; and (4), preparing the polylactic acid / sliver composite conductive fiber by an ultraviolet radiation method, so that the polylactic acid / sliver composite conductive fiber is obtained. According to the preparation method of the polylactic acid / sliver composite conductive fiber, silver nitrate is reduced to metal sliver by adopting the ultraviolet radiation method, and therefore, the preparation method is simple to operate, non-toxic and pollution-free, free of the three wastes in the whole process and environment-friendly.

Description

technical field [0001] The invention belongs to the field of composite conductive fiber and its preparation, in particular to a polylactic acid / silver composite conductive fiber and its preparation method. Background technique [0002] As a high-tech, high value-added product, conductive fiber not only has the excellent electrical properties of conductive components, but also has the flexibility and processability of textile fibers. Since its advent, it has been marketed for more than 50 years. In addition to excellent textile performance, conductive fiber also has excellent electrical conductivity, which can be used to eliminate static electricity and absorb electromagnetic waves, and has a unique position in the antistatic field of chemical fiber products, so it can not only be used in petrochemical, military and other industries. Anti-static explosion-proof clothing, and can also be used to prepare dust-free and sterile clothing in the fields of microelectronics, medi...

AI Technical Summary

Problems solved by technology

First of all, in the preparation method of silver fiber, electroless plating has a serious problem of waste liquid treatment because of the large amount of metal salt solution used, which is likely to cause environmental pollution

Although the coating method, vacuum plating method and sputtering method avoid the problem of waste liquid treatment of electroless plating, the process itself is complicated and the operation is inconvenient

Furthermore, the coating method cannot form a good metal coating, and the bonding force is weak

The vacuum plating method also has the problem that the metal layer is not firmly bonded to the substrate and is easy to fall off.

And the general feel of the fabric obtained by the above method is very poor, most of them cannot be cleaned, and there is environmental pollution etc. in the production.