Method for preparing antistatic polyacrylonitrile fibers from double-component nano electroconductive agent

Abstract

The invention discloses a method for preparing antistatic polyacrylonitrile fibers from a double-component nano electroconductive agent. The method comprises the following steps of: (1) compounding nano ATO (antimony tin oxide) with carbon nanotubes at a mass ratio of 1: (1-100) to obtain the double-component nano electroconductive agent, placing the double-component nano electroconductive agent,polyacrylonitrile and a dispersant in a spinning solvent, sufficiently stirring for dissolving polyacrylonitrile to obtain a blend solution, and treating in an ultrasonic dispersion device to prepare a blend spinning stock solution; and (2) passing through the blend spinning stock solution through a filtering and metering pump, and intruding to a coagulation bath composed of the spinning solvent and water through spinneret orifices to prepare the polyacrylonitrile fibers. The method has a simple process and high production efficiency, and can easily realize fiber production by adopting a conventional wet spinning process. By reasonable matching of different features and properties of nano ATO and carbon nanotubes, an electroconductive channel is formed in a polyacrylonitrile matrix, thus the electric conductivity of the polyacrylonitrile fiber is greatly improved.

Description

technical field [0001] The technology of the invention belongs to the field of antistatic nanocomposite materials, and in particular relates to an antistatic polyacrylonitrile antistatic fiber with nano-ATO and carbon nanotubes as compound components and a preparation method thereof. Background technique [0002] Since the advent of chemical fiber, it has developed rapidly and the market has been expanding continuously due to its excellent properties that many natural fibers cannot match. But at the same time, an important common feature of their existence is also exposed in the process of production and use, that is, poor hygroscopicity, easy to generate static electricity in the process of use, and thus bring harm to industrial production and people's lives, which makes it harmful to synthetic materials. The research on the antistatic properties of fibers has attracted more and more attention. [0003] Acrylic fiber is a widely used chemical fiber with fluffy texture, sof...

AI Technical Summary

Problems solved by technology

At present, there are three main methods for preparing antistatic fibers: one is to use physical or chemical methods to form a metal coating on the fiber surface on the surface of textiles such as fibers. This method often makes the fiber feel rough due to the metal coating formed. It is difficult to carry out textile processing, and the investment in production equipment is large, the efficiency is low, and the production cost is high; the second is to use a chemical method to form a semiconductor thin layer on the surface of the fiber. The chemical method is relatively simple and has little effect on the physical and mechanical properties of the fiber. Good, but the conductive durability is poor; the third is to mix conductive particles into the spinning melt, and make conductive fibers with skin-core structure or sea-island structure through composite spinning. The fibers prepared by this method have excellent conductive durability. And because it adds less conductive particles and does not damage the physical properties of the fiber, it has received widespread attention

However, when using this process to prepare antistatic fibers, the size of the conductive filler particles usually used is mostly in the μm range, which does not have the characteristics of nanomaterials, and in the molding process, the loss of equipment is often increased, which is not conducive to reducing Cost of production