Antibacterial polylactic acid and starch compound fully-degradable plastic film and manufacturing method thereof
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A technology of plastic film and polylactic acid, applied in the field of plastic film, can solve the problems of low toughness and high price of polylactic acid, and achieve the effects of good thermal stability, improved interface contact effect and compatibility, and improved mechanical properties.
Inactive Publication Date: 2016-09-28
ANHUI MENGNIU COLOR PRINTING&PACKAGING
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[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
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[0017] specific implementation plan
[0018] The present invention will be described in detail below through specific examples.
[0019] An antibacterial polylactic acid and starch composite fully degradable plastic film is prepared from the following raw materials in parts by weight (kg): 80 polylactic acid, 20 corn starch, an appropriate amount of 1mol / L sodium hydroxide solution, and 1mol / L hydrochloric acid Appropriate amount, hemp fiber 25, silane coupling agent kh-550 0.8, appropriate amount of distilled water, glycerin 12, epichlorohydrin 1.6, nano zinc oxide 3, chitosan 1, OP-10 0.4, castor oil 2, ultrafine zeolite Powder 2;
[0020] An antibacterial polylactic acid and starch composite fully degradable plastic film described in the present invention is made by the following specific steps:
[0021] (1) Put the hemp fiber into a double amount of 1mol / L sodium hydroxide solution, heat it to 100°C under normal pressure, cook for 2.5 hours, take it out after cooling, wa...
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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...
Claims
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