Preparation method and application of graphene modified polyurethane film-forming agent

Abstract

The invention provides a preparation method of a graphene modified polyurethane film-forming agent. The method includes: reacting polyether diols or polyether polyol with isocyanate modified graphene or functional graphene to generate an isocyanate-terminated prepolymer, then subjecting the prepolymer to chain extension with diol amine or triol amine, finally performing end-capping with alkylamine, a hydroxyl compound or dialkyl alcohol amine compound, then carrying out acidizing neutralization, and adding water to conduct emulsification, removing the organic solvent by vaporization so as to obtain the graphene modified polyurethane film-forming agent. The method provided by the invention has the characteristics of low reaction temperature, simple process, and recyclability of solvent, and is atom economic reaction without ''three wastes''. The obtained film-forming agent can be used as conductive paint and film-forming agent to prepare glass fiber drawing impregnating agents, fabric sizing agents, leather finishing agents, carbon fiber sizing agents, adhesives or paint, etc. The film-forming agent can effectively reduce the material surface resistance, and can be used in the antistatic or electromagnetic shielding material field.

Description

technical field [0001] The invention relates to the technical field of preparing an antistatic or conductive film-forming agent, and specifically relates to a method for preparing a graphene-modified polyurethane film-forming agent. Background technique [0002] Sizing agent is an indispensable material in glass fiber drawing and weaving. After the drawing process, glass fiber is treated with glass fiber sizing agent to improve its processing performance, and can produce strong adhesion with reinforced resin. Sizing agent It plays the role of making fibers bonded and bundled, lubricating and wear-resistant, and removing static electricity. The raw material and formula technology of sizing agent are the most critical technology to reflect the inherent quality of various glass fiber products (including yarn, cloth, felt), and are also indispensable industrial consumables in glass fiber production. Its importance is often equated with the "chip manufacturing technology" of the...

AI Technical Summary

Problems solved by technology

[0005] The antistatic composite material prepared by conductive fiber eliminates static electricity through the principle of electron conduction and corona discharge, which can eliminate static electricity in a very short time, and the fiber fillers are intricately overlapped to form a continuous conductive network, which can be obtained at a low filling amount. High conductivity, antistatic effect is significant and durable, and can avoid the influence of powder antistatic fillers on the mechanical properties of materials, so the development of conductive fibers has become an important way to prepare antistatic composite materials, but many preparation methods are difficult to achieve conductive fibers Large-scale preparation or application has become a bottleneck in the development of antistatic composite materials