Antibacterial polylactic acid and starch compound fully-degradable plastic film and manufacturing method thereof

Abstract

The invention discloses an antibacterial polylactic acid and starch compound fully-degradable plastic film, which is characterized by being made from the following raw materials, by weight part, 80-85 of polylactic acid, 20-25 of corn starch, a proper amount of a sodium hydroxide solution with the concentration being 1 mol / L, a proper amount of hydrochloric acid with the concentration being 1 mol / L, 25-30 of hemp fibers, 0.8-1 of a silane coupling agent kh-550, a proper amount of distilled water, 12-14 of glycerin, 1.6-2 of epichlorohydrin, 3-4 of nanometer zinc oxide, 1-1.5 of chitosan, 0.4-0.6 of OP-10, 2-3 of castor oil, and 2-3 of ultrafine zeolite powder. Components, such as nanometer zinc oxide, chitosan and castor oil, have a synergistic effect and can improve antibacterial properties of the plastic film. The plastic film has biodegradability, is good in thermostability, and is excellent in toughness, mechanical properties, and use performance. The plastic film is safe and eco-friendly, and can meet the environment-protection requirements.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to an antibacterial polylactic acid and starch composite fully degradable plastic film and a preparation method thereof. Background technique [0002] In order to reduce the use of petroleum-based plastic materials, protect the environment, and alleviate the increasingly severe shortage of petroleum resources, the development and utilization of bio-based degradable and environmentally friendly plastic materials has become the focus of research in the field of packaging materials. [0003] Polylactic acid material is one of the most widely used degradable plastic materials at present. As a packaging film material, PLA has good transparency, mechanical properties and biocompatibility, high strength, thermoplasticity, hydrophobicity, easy molding and processing, and can be completely Degradation, the degradation products are non-toxic and harmless to the human body, come from ren...

AI Technical Summary

Problems solved by technology

[0003] Polylactic acid material is one of the most widely used degradable plastic materials at present. As a packaging film material, PLA has good transparency, mechanical properties and biocompatibility, high strength, thermoplasticity, hydrophobicity, easy molding and processing, and can be completely Degradation, the degradation products are non-toxic and harmless to the human body, come from renewable resources, and are easy to recycle, etc., but the defects of polylactic acid are expensive, high brittleness, and low toughness affect its application in a wider range of fields