Preparation method of antistatic hard polyvinyl chloride material

Abstract

The invention discloses a preparation method of an antistatic hard polyvinyl chloride material, and belongs to the technical field of functional material preparation. According to the preparation method, peeling of expandable graphite is carried out with microwave so as to obtain expanded graphite; expanded graphite and one-dimensional carbon fiber are taken as conductive filling materials, and are subjected to open mill blending with PVC, and hot pressing and cold pressing moulding so as to obtain the antistatic hard polyvinyl chloride material. According to the preparation method, peeling ofexpandable graphite and surface modification are realized based on microwave technology, so that a graphite two dimensional filling material system with surface PVC compatibility and containing nanometer graphite flakes is obtained, coordinating of the carbon fiber one-dimensional filling system is realized, construction of a network structure is realized, excellent mechanical properties and antistatic performance at a low filling amount are achieved. Hard PVC is provided with antistatic performance by the microwave expanded graphite / carbon fiber / PVC multicomponent filing 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...

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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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