A kind of preparation method of antistatic rigid polyvinyl chloride material

Abstract

The invention discloses a preparation method of an antistatic rigid polyvinyl chloride material, which belongs to the technical field of preparation of functional materials. First, the expandable graphite is peeled off by microwave to obtain expanded graphite, and then the expanded graphite and one-dimensional carbon fiber are used as conductive fillers, which are blended with PVC and then subjected to hot pressing and cold pressing molding processes to obtain antistatic rigid polyvinyl chloride Material. Based on microwave technology, the present invention realizes the exfoliation and surface modification of expandable graphite, forms a surface compatible with PVC, forms a graphite two-dimensional filler system containing nano-graphite flakes, coordinates a carbon fiber one-dimensional filler system, and builds an overlapping network structure, realizing Good mechanical properties and excellent antistatic properties at low filling levels. The feature of the invention is that the rigid PVC is endowed with antistatic properties through a microwave expanded graphite / carbon fiber / PVC multi-component filling system.

Description

technical field [0001] The invention belongs to the technical field of functional material preparation. Background technique [0002] As one of the five general-purpose materials, PVC is the most widely used thermoplastic resin due to its low price and adjustable hardness. However, due to the good electrical insulation of PVC, static charges are easily generated on the surface, and these static charges are not easy to transfer on the surface. When the electrostatic charge on the surface accumulates to a certain extent, it will bring serious danger, which greatly limits its range of use. Therefore, the research on the antistatic modification of PVC is of great significance to the expansion of its application range. [0003] Due to the simple process and low cost, the filling of conductive filler is currently the main method for preparing antistatic PVC. Commonly used conductive fillers mainly include graphite, metal powder, carbon black, etc. However, these fillers have p...

AI Technical Summary

Problems solved by technology

However, these fillers have poor compatibility with PVC and weak conductivity. The antistatic effect cannot be achieved when the filling amount is small, and the mechanical properties of PVC materials will be significantly reduced when the filling amount is large.

Graphene-based nano-carbon materials can be used to modify PVC at low filling levels. However, due to the high cost and the compatibility of graphene and PVC, the commercial use of ordinary resin PVC is not yet mature.

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