Conductive network remodeling method based on SBS conductive fibers, conductive composite fibers prepared by using method and preparation method thereof

Abstract

The invention relates to the technical field of polymer conductive materials, in particular to a conductive network remodeling method based on SBS conductive fibers. The method comprises the following steps: (1) preparing an ethyl acetate mixed solution; and (2) soaking the SBS conductive fibers in the ethyl acetate mixed solution prepared in the step (1) for 5-15 s, taking out the SBS conductive fibers, and drying the SBS conductive fibers. According to the method, the conductive network in the conductive fibers is remodeled, the technical problem that the electrical property of the fibers is poor due to uneven distribution of conductive particles in the conductive fibers is solved, the surface of the fibers is smooth, the electrical property is effectively improved, and the strength of the fibers cannot be reduced. The invention also provides a conductive composite fiber prepared by using the conductive network remodeling method based on the SBS conductive fibers, and a preparation method of the conductive composite fiber. The preparation method is simple to operate, convenient and economical, the fibers cannot be damaged, and the prepared fibers have good spinnability, stretchability, conductivity, high strain range and stability.

Description

technical field [0001] The invention relates to the technical field of polymer conductive materials, in particular to a method for remodeling a conductive network based on SBS conductive fibers, a conductive composite fiber prepared by the method and a preparation method thereof. Background technique [0002] As people pay more and more attention to their own exercise health, the demand for real-time monitoring of human physiological signals and exercise changes is increasing. Although traditional electronic products such as smart watches have been put into use, their poor flexibility and low fit to the human body restrict the further development of wearable sensing devices. In this context, flexible fabric strain sensors based on carbon-based nanomaterials have been widely used due to their good wearing comfort. [0003] However, the traditional flexible fabric strain sensor has poor conductivity. In order to improve the sensitivity, stability and working range of the stra...

AI Technical Summary

Problems solved by technology

Although the patent uses graphene and carbon nanotubes to improve the conductivity of the composite conductive fiber, there are some obvious shortcomings in this method: the preparation process is extremely complicated and time-consuming, the production efficiency is low, and a large amount of strong acid, antioxidant, dispersant, etc. are required. Treatment in high-concentration strong acid is likely to destroy the structure of carbon nanotubes and reduce the aspect ratio, resulting in an increase in the resistance of the carbon nanotube-matrix interface, which is not conducive to the formation of a conductive network and the improvement of the conductivity of the composite material, which will affect Conductive properties of fibers

However, since graphene and nano-silver particles are located in the core layer inside the fiber, when the conductive network of the fiber is reconstructed by etching, not only will there be resistance from the cortex structure, but it will also affect the appearance of the fiber and the strength of the fiber. , so the conductive fiber prepared by this method is not suitable for the reconstruction of the conductive network

Since the conductive network of the fiber cannot be reconstructed, the electrical properties of the fiber will be affected when the conductive particles such as graphene and nano-silver particles in the core layer are piled up or partially missing.

[0008] In view of this, there is an urgent need for a new conductive network construction method to solve the technical problems of uneven distribution of conductive particles in traditional conductive composite fibers, damage to the internal and external structures of fibers, resulting in poor conductivity and low fiber strength.

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