Biodegradable anti-static macromolecule composite material and preparation method of the same

Abstract

The invention relates to a biodegradable anti-static macromolecule composite material which is prepared by mixing the following components by weight: 20-80% of polylactic acid; 10-70% of modified starch; 1-10% of anti-static agent; 1-5% of plasticizer and 1-5% compatilizer. The biodegradable anti-static macromolecule composite material achieves surface resistance of being lower than or equal to 106 ohm, tensile strength of 20-35Mpa and breaking elongation percent of 10-20% and has excellent anti-static and mechanical properties; simultaneously the biodegradable anti-static macromolecule composite material has good environmental degradation property and after 12-week composting, the biological decomposition is above 90%; and the forming processing property is remarkable, therefore the biodegradable anti-static macromolecule composite material can form various products by methods of extrusion, injection molding, hot pressing and the like on processing equipment of common plastics.

Description

technical field [0001] The invention relates to a biodegradable polymer composite material, in particular to a biodegradable antistatic polymer composite material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Plastic packaging materials are widely used in the fields of food, electronics, aerospace, weapons industry, and textiles. In daily life and production, many plastic packaging materials are prone to static electricity accumulation during use, causing vicious accidents such as vacuuming, electric shock, and even explosion after sparks are generated. At present, the most common and effective method is to use antistatic agent to reduce the surface resistivity of the material, so that it has been widely used. [0003] However, the main components of traditional anti-static plastic packaging materials are generally petroleum-based polymer materials, such as polyolefin, polyvinyl chloride, polystyrene, ...

AI Technical Summary

Problems solved by technology

Some existing heat-resistant polylactic acid and other biomass plastics are expensive, do not have the advantages of daily application, and cannot be mass-produced

Patent CN101967271A discloses a short carbon fiber reinforced antistatic polylactic acid composite material, which is prepared by mixing polylactic acid, short carbon fiber, coupling agent, antioxidant, and lubricant in proportion, and then pelletizing short carbon fiber through twin-screw melt extrusion Strengthen the antistatic polylactic acid composite material, so that polylactic acid has antistatic properties, but due to the high price of polylactic acid as a matrix material, it does not have the advantage of general promotion

Patent CN1013128301A discloses a polylactic acid multilayer film composed of a base layer and at least one covering layer composed of aliphatic hydroxycarboxylic acid, wherein the covering layer contains starch-based particles in a weight ratio of 0.002 to 20 by weight of the covering layer, Although the polylactic acid multilayer film has good antistatic properties, as a film, it cannot be formed by injection molding, hot pressing, etc., and cannot be prepared into products such as food trays, electromagnetic trays, medical trays, cutlery, and spoons, and its application range is narrow.

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