High-conductivity nano mineral modified full-degradable polymer composite material and preparation method thereof

Abstract

The invention discloses a preparation method of a high-conductivity nano mineral modified full-degradable polymer composite material. The method comprises the following steps: adding attapulgite and asurface treating agent into water, performing mixing, and putting the mixture into a microwave reaction kettle to obtain an intermediate-containing water-based dispersion liquid; continuously and sequentially adding a pyrrole monomer, a doping agent and an oxidizing agent into the microwave reaction kettle to obtain functionalized attapulgite water-based dispersion liquid; carrying out spray drying on the functionalized attapulgite dispersion liquid to obtain functionalized attapulgite microparticles; putting the functionalized attapulgite microparticles, degradable macromolecules, a compatilizer and a processing aid into mixing equipment for melt blending to obtain functional master batch containing functionalized attapulgite; and mixing the functional master batch and the degradable polymer, and putting the mixture into melt blending equipment for melt blending to obtain the degradable antistatic composite material. According to the invention, the surface functionalization and highconductivity of the mineral filler are realized, and the processability, conductivity and mechanical properties of the composite material are greatly improved.

Description

technical field [0001] The invention relates to an antistatic functional nanocomposite material using functionalized attapulgite to modify degradable polymers, in particular to a highly conductive nano-mineral modified fully degradable polymer with high strength, high toughness and excellent electrical conductivity The composite material and its preparation method belong to the high-performance and multi-functional technical field of degradable polymer materials. Background technique [0002] The extensive application of traditional non-degradable plastics not only consumes a lot of oil and resources, but also causes huge environmental pollution and ecological damage. Although some plastics are recycled and reused, most waste plastics are landfilled and incinerated, especially plastic packaging waste in household waste. According to statistics, more than 41% of the total plastic output is used in the packaging industry, and 47% of it is used in food packaging. Conventional...

AI Technical Summary

Problems solved by technology

However, some inherent performance defects of degradable polymer materials, such as brittleness, poor heat resistance, and low melt strength, limit their wider application in packaging materials.

The specific defects are: (1) Environmental pollution pressure of petroleum-based traditional materials: Although high-power spinning can significantly improve the orientation degree of polypropylene molecular chains and crystals, it will cause fiber surface quality defects (such as hairiness, holes), which will become obstacles instead. Major Obstacles to Fiber Performance Improvement and Its Application

(2) Conventional conductive materials are non-degradable and the color of the product is limited: the conventional addition of ordinary micron / nano-sized talc powder or mica powder can improve the nucleation ability of polypropylene and endow polypropylene fibers with a certain reinforcement effect; Agglomeration occurs, which makes the processing of fiber materials difficult, and often becomes the stress concentration failure point of polypropylene fibers

(3) The dispersion effect of fillers in the form of ordinary melt processing is poor: the introduction of fillers such as nucleating agents or reinforcing phases such as glass fibers will cause great damage to the production environment or processing equipment, and at the same time affect the environment. It is difficult to achieve low-cost, sustainable production supply

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